Merge tag 'at91-soc-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux into arm/soc

AT91 soc for 5.15:

- add new SoC based on a Cortex-A7 core: the SAMA7G5 family
  - mach-at91 entry, Kconfig and header files
  - Power Management Controller (PMC) code and associated power management
    changes. Support for suspend/resume, Ultra Low Power modes and
    Backup with Memory in Self-Refresh mode.
  - Power management association with DDR controller and
    shutdown controller for addressing this variety of modes.

* tag 'at91-soc-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux: (26 commits)
  ARM: at91: pm: add sama7g5 shdwc
  ARM: at91: pm: add pm support for SAMA7G5
  ARM: at91: sama7: introduce sama7 SoC family
  ARM: at91: pm: add sama7g5's pmc
  ARM: at91: pm: add backup mode support for SAMA7G5
  ARM: at91: pm: save ddr phy calibration data to securam
  ARM: at91: pm: add sama7g5 ddr phy controller
  ARM: at91: pm: add sama7g5 ddr controller
  ARM: at91: pm: wait for ddr power mode off
  ARM: at91: pm: add support for 2.5V LDO regulator control
  ARM: at91: pm: add support for MCK1..4 save/restore for ulp modes
  ARM: at91: pm: add self-refresh support for sama7g5
  ARM: at91: ddr: add registers definitions for sama7g5's ddr
  ARM: at91: sfrbu: add sfrbu registers definitions for sama7g5
  ARM: at91: pm: add support for waiting MCK1..4
  ARM: at91: pm: s/CONFIG_SOC_SAM9X60/CONFIG_HAVE_AT91_SAM9X60_PLL/g
  ARM: at91: pm: avoid push and pop on stack while memory is in self-refersh
  ARM: at91: pm: use r7 instead of tmp1
  ARM: at91: pm: do not initialize pdev
  ARM: at91: pm: check for different controllers in at91_pm_modes_init()
  ...

Link: https://lore.kernel.org/r/20210804084316.12641-1-nicolas.ferre@microchip.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

12 files changed, 1090 insertions, 289 deletions

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 1c4384db223d..98436702e0c7 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -193,6 +193,14 @@ choice
 		  their output to the USART1 port on SAMV7 based
 		  machines.
 
+	config DEBUG_AT91_SAMA7G5_FLEXCOM3
+		bool "Kernel low-level debugging on SAMA7G5 FLEXCOM3"
+		select DEBUG_AT91_UART
+		depends on SOC_SAMA7G5
+		help
+		  Say Y here if you want kernel low-level debugging support
+		  on the FLEXCOM3 port of SAMA7G5.
+
 	config DEBUG_BCM2835
 		bool "Kernel low-level debugging on BCM2835 PL011 UART"
 		depends on ARCH_BCM2835 && ARCH_MULTI_V6
@@ -1668,6 +1676,7 @@ config DEBUG_UART_PHYS
 	default 0xd4017000 if DEBUG_MMP_UART2
 	default 0xd4018000 if DEBUG_MMP_UART3
 	default 0xe0000000 if DEBUG_SPEAR13XX
+	default 0xe1824200 if DEBUG_AT91_SAMA7G5_FLEXCOM3
 	default 0xe4007000 if DEBUG_HIP04_UART
 	default 0xe6c40000 if DEBUG_RMOBILE_SCIFA0
 	default 0xe6c50000 if DEBUG_RMOBILE_SCIFA1
@@ -1729,6 +1738,7 @@ config DEBUG_UART_VIRT
 	default 0xc8821000 if DEBUG_RV1108_UART1
 	default 0xc8912000 if DEBUG_RV1108_UART0
 	default 0xe0010fe0 if ARCH_RPC
+	default 0xe0824200 if DEBUG_AT91_SAMA7G5_FLEXCOM3
 	default 0xf0010000 if DEBUG_ASM9260_UART
 	default 0xf0100000 if DEBUG_DIGICOLOR_UA0
 	default 0xf01fb000 if DEBUG_NOMADIK_UART
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index ccd7e80ce943..b09bb2279f7f 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -57,6 +57,16 @@ config SOC_SAMA5D4
 	help
 	  Select this if you are using one of Microchip's SAMA5D4 family SoC.
 
+config SOC_SAMA7G5
+	bool "SAMA7G5 family"
+	depends on ARCH_MULTI_V7
+	select HAVE_AT91_GENERATED_CLK
+	select HAVE_AT91_SAM9X60_PLL
+	select HAVE_AT91_UTMI
+	select SOC_SAMA7
+	help
+	  Select this if you are using one of Microchip's SAMA7G5 family SoC.
+
 config SOC_AT91RM9200
 	bool "AT91RM9200"
 	depends on ARCH_MULTI_V4T
@@ -191,4 +201,12 @@ config SOC_SAMA5
 config ATMEL_PM
 	bool
 
+config SOC_SAMA7
+	bool
+	select ARM_GIC
+	select ATMEL_PM if PM
+	select ATMEL_SDRAMC
+	select MEMORY
+	select SOC_SAM_V7
+	select SRAM if PM
 endif
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index f565490f1b70..522b680b6446 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_SOC_AT91RM9200)	+= at91rm9200.o
 obj-$(CONFIG_SOC_AT91SAM9)	+= at91sam9.o
 obj-$(CONFIG_SOC_SAM9X60)	+= sam9x60.o
 obj-$(CONFIG_SOC_SAMA5)		+= sama5.o
+obj-$(CONFIG_SOC_SAMA7)		+= sama7.o
 obj-$(CONFIG_SOC_SAMV7)		+= samv7.o
 
 # Power Management
diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h
index 0a4cdcb4985b..0c3960a8b3eb 100644
--- a/arch/arm/mach-at91/generic.h
+++ b/arch/arm/mach-at91/generic.h
@@ -14,12 +14,14 @@ extern void __init at91sam9_pm_init(void);
 extern void __init sam9x60_pm_init(void);
 extern void __init sama5_pm_init(void);
 extern void __init sama5d2_pm_init(void);
+extern void __init sama7_pm_init(void);
 #else
 static inline void __init at91rm9200_pm_init(void) { }
 static inline void __init at91sam9_pm_init(void) { }
 static inline void __init sam9x60_pm_init(void) { }
 static inline void __init sama5_pm_init(void) { }
 static inline void __init sama5d2_pm_init(void) { }
+static inline void __init sama7_pm_init(void) { }
 #endif
 
 #endif /* _AT91_GENERIC_H */
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 90dcdfe3b3d0..d6cfe7c4bb00 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -10,6 +10,7 @@
 #include <linux/io.h>
 #include <linux/of_address.h>
 #include <linux/of.h>
+#include <linux/of_fdt.h>
 #include <linux/of_platform.h>
 #include <linux/parser.h>
 #include <linux/suspend.h>
@@ -27,13 +28,55 @@
 #include "generic.h"
 #include "pm.h"
 
+#define BACKUP_DDR_PHY_CALIBRATION	(9)
+
+/**
+ * struct at91_pm_bu - AT91 power management backup unit data structure
+ * @suspended: true if suspended to backup mode
+ * @reserved: reserved
+ * @canary: canary data for memory checking after exit from backup mode
+ * @resume: resume API
+ * @ddr_phy_calibration: DDR PHY calibration data: ZQ0CR0, first 8 words
+ * of the memory
+ */
+struct at91_pm_bu {
+	int suspended;
+	unsigned long reserved;
+	phys_addr_t canary;
+	phys_addr_t resume;
+	unsigned long ddr_phy_calibration[BACKUP_DDR_PHY_CALIBRATION];
+};
+
+/**
+ * struct at91_soc_pm - AT91 SoC power management data structure
+ * @config_shdwc_ws: wakeup sources configuration function for SHDWC
+ * @config_pmc_ws: wakeup srouces configuration function for PMC
+ * @ws_ids: wakup sources of_device_id array
+ * @data: PM data to be used on last phase of suspend
+ * @bu: backup unit mapped data (for backup mode)
+ * @memcs: memory chip select
+ */
 struct at91_soc_pm {
 	int (*config_shdwc_ws)(void __iomem *shdwc, u32 *mode, u32 *polarity);
 	int (*config_pmc_ws)(void __iomem *pmc, u32 mode, u32 polarity);
 	const struct of_device_id *ws_ids;
+	struct at91_pm_bu *bu;
 	struct at91_pm_data data;
+	void *memcs;
 };
 
+/**
+ * enum at91_pm_iomaps:	IOs that needs to be mapped for different PM modes
+ * @AT91_PM_IOMAP_SHDWC:	SHDWC controller
+ * @AT91_PM_IOMAP_SFRBU:	SFRBU controller
+ */
+enum at91_pm_iomaps {
+	AT91_PM_IOMAP_SHDWC,
+	AT91_PM_IOMAP_SFRBU,
+};
+
+#define AT91_PM_IOMAP(name)	BIT(AT91_PM_IOMAP_##name)
+
 static struct at91_soc_pm soc_pm = {
 	.data = {
 		.standby_mode = AT91_PM_STANDBY,
@@ -71,13 +114,6 @@ static int at91_pm_valid_state(suspend_state_t state)
 
 static int canary = 0xA5A5A5A5;
 
-static struct at91_pm_bu {
-	int suspended;
-	unsigned long reserved;
-	phys_addr_t canary;
-	phys_addr_t resume;
-} *pm_bu;
-
 struct wakeup_source_info {
 	unsigned int pmc_fsmr_bit;
 	unsigned int shdwc_mr_bit;
@@ -116,6 +152,17 @@ static const struct of_device_id sam9x60_ws_ids[] = {
 	{ /* sentinel */ }
 };
 
+static const struct of_device_id sama7g5_ws_ids[] = {
+	{ .compatible = "atmel,at91sam9x5-rtc",		.data = &ws_info[1] },
+	{ .compatible = "microchip,sama7g5-ohci",	.data = &ws_info[2] },
+	{ .compatible = "usb-ohci",			.data = &ws_info[2] },
+	{ .compatible = "atmel,at91sam9g45-ehci",	.data = &ws_info[2] },
+	{ .compatible = "usb-ehci",			.data = &ws_info[2] },
+	{ .compatible = "microchip,sama7g5-sdhci",	.data = &ws_info[3] },
+	{ .compatible = "atmel,at91sam9260-rtt",	.data = &ws_info[4] },
+	{ /* sentinel */ }
+};
+
 static int at91_pm_config_ws(unsigned int pm_mode, bool set)
 {
 	const struct wakeup_source_info *wsi;
@@ -206,6 +253,8 @@ static int at91_sam9x60_config_pmc_ws(void __iomem *pmc, u32 mode, u32 polarity)
  */
 static int at91_pm_begin(suspend_state_t state)
 {
+	int ret;
+
 	switch (state) {
 	case PM_SUSPEND_MEM:
 		soc_pm.data.mode = soc_pm.data.suspend_mode;
@@ -219,7 +268,16 @@ static int at91_pm_begin(suspend_state_t state)
 		soc_pm.data.mode = -1;
 	}
 
-	return at91_pm_config_ws(soc_pm.data.mode, true);
+	ret = at91_pm_config_ws(soc_pm.data.mode, true);
+	if (ret)
+		return ret;
+
+	if (soc_pm.data.mode == AT91_PM_BACKUP)
+		soc_pm.bu->suspended = 1;
+	else if (soc_pm.bu)
+		soc_pm.bu->suspended = 0;
+
+	return 0;
 }
 
 /*
@@ -277,6 +335,19 @@ extern u32 at91_pm_suspend_in_sram_sz;
 
 static int at91_suspend_finish(unsigned long val)
 {
+	int i;
+
+	if (soc_pm.data.mode == AT91_PM_BACKUP && soc_pm.data.ramc_phy) {
+		/*
+		 * The 1st 8 words of memory might get corrupted in the process
+		 * of DDR PHY recalibration; it is saved here in securam and it
+		 * will be restored later, after recalibration, by bootloader
+		 */
+		for (i = 1; i < BACKUP_DDR_PHY_CALIBRATION; i++)
+			soc_pm.bu->ddr_phy_calibration[i] =
+				*((unsigned int *)soc_pm.memcs + (i - 1));
+	}
+
 	flush_cache_all();
 	outer_disable();
 
@@ -288,8 +359,6 @@ static int at91_suspend_finish(unsigned long val)
 static void at91_pm_suspend(suspend_state_t state)
 {
 	if (soc_pm.data.mode == AT91_PM_BACKUP) {
-		pm_bu->suspended = 1;
-
 		cpu_suspend(0, at91_suspend_finish);
 
 		/* The SRAM is lost between suspend cycles */
@@ -511,10 +580,16 @@ static const struct of_device_id ramc_ids[] __initconst = {
 	{ .compatible = "atmel,at91sam9260-sdramc", .data = &ramc_infos[1] },
 	{ .compatible = "atmel,at91sam9g45-ddramc", .data = &ramc_infos[2] },
 	{ .compatible = "atmel,sama5d3-ddramc", .data = &ramc_infos[3] },
+	{ .compatible = "microchip,sama7g5-uddrc", },
 	{ /*sentinel*/ }
 };
 
-static __init void at91_dt_ramc(void)
+static const struct of_device_id ramc_phy_ids[] __initconst = {
+	{ .compatible = "microchip,sama7g5-ddr3phy", },
+	{ /* Sentinel. */ },
+};
+
+static __init void at91_dt_ramc(bool phy_mandatory)
 {
 	struct device_node *np;
 	const struct of_device_id *of_id;
@@ -528,9 +603,11 @@ static __init void at91_dt_ramc(void)
 			panic(pr_fmt("unable to map ramc[%d] cpu registers\n"), idx);
 
 		ramc = of_id->data;
-		if (!standby)
-			standby = ramc->idle;
-		soc_pm.data.memctrl = ramc->memctrl;
+		if (ramc) {
+			if (!standby)
+				standby = ramc->idle;
+			soc_pm.data.memctrl = ramc->memctrl;
+		}
 
 		idx++;
 	}
@@ -538,6 +615,16 @@ static __init void at91_dt_ramc(void)
 	if (!idx)
 		panic(pr_fmt("unable to find compatible ram controller node in dtb\n"));
 
+	/* Lookup for DDR PHY node, if any. */
+	for_each_matching_node_and_match(np, ramc_phy_ids, &of_id) {
+		soc_pm.data.ramc_phy = of_iomap(np, 0);
+		if (!soc_pm.data.ramc_phy)
+			panic(pr_fmt("unable to map ramc phy cpu registers\n"));
+	}
+
+	if (phy_mandatory && !soc_pm.data.ramc_phy)
+		panic(pr_fmt("DDR PHY is mandatory!\n"));
+
 	if (!standby) {
 		pr_warn("ramc no standby function available\n");
 		return;
@@ -618,37 +705,57 @@ static bool __init at91_is_pm_mode_active(int pm_mode)
 		soc_pm.data.suspend_mode == pm_mode);
 }
 
+static int __init at91_pm_backup_scan_memcs(unsigned long node,
+					    const char *uname, int depth,
+					    void *data)
+{
+	const char *type;
+	const __be32 *reg;
+	int *located = data;
+	int size;
+
+	/* Memory node already located. */
+	if (*located)
+		return 0;
+
+	type = of_get_flat_dt_prop(node, "device_type", NULL);
+
+	/* We are scanning "memory" nodes only. */
+	if (!type || strcmp(type, "memory"))
+		return 0;
+
+	reg = of_get_flat_dt_prop(node, "reg", &size);
+	if (reg) {
+		soc_pm.memcs = __va((phys_addr_t)be32_to_cpu(*reg));
+		*located = 1;
+	}
+
+	return 0;
+}
+
 static int __init at91_pm_backup_init(void)
 {
 	struct gen_pool *sram_pool;
 	struct device_node *np;
-	struct platform_device *pdev = NULL;
-	int ret = -ENODEV;
+	struct platform_device *pdev;
+	int ret = -ENODEV, located = 0;
 
-	if (!IS_ENABLED(CONFIG_SOC_SAMA5D2))
+	if (!IS_ENABLED(CONFIG_SOC_SAMA5D2) &&
+	    !IS_ENABLED(CONFIG_SOC_SAMA7G5))
 		return -EPERM;
 
 	if (!at91_is_pm_mode_active(AT91_PM_BACKUP))
 		return 0;
 
-	np = of_find_compatible_node(NULL, NULL, "atmel,sama5d2-sfrbu");
-	if (!np) {
-		pr_warn("%s: failed to find sfrbu!\n", __func__);
-		return ret;
-	}
-
-	soc_pm.data.sfrbu = of_iomap(np, 0);
-	of_node_put(np);
-
 	np = of_find_compatible_node(NULL, NULL, "atmel,sama5d2-securam");
 	if (!np)
-		goto securam_fail_no_ref_dev;
+		return ret;
 
 	pdev = of_find_device_by_node(np);
 	of_node_put(np);
 	if (!pdev) {
 		pr_warn("%s: failed to find securam device!\n", __func__);
-		goto securam_fail_no_ref_dev;
+		return ret;
 	}
 
 	sram_pool = gen_pool_get(&pdev->dev, NULL);
@@ -657,79 +764,117 @@ static int __init at91_pm_backup_init(void)
 		goto securam_fail;
 	}
 
-	pm_bu = (void *)gen_pool_alloc(sram_pool, sizeof(struct at91_pm_bu));
-	if (!pm_bu) {
+	soc_pm.bu = (void *)gen_pool_alloc(sram_pool, sizeof(struct at91_pm_bu));
+	if (!soc_pm.bu) {
 		pr_warn("%s: unable to alloc securam!\n", __func__);
 		ret = -ENOMEM;
 		goto securam_fail;
 	}
 
-	pm_bu->suspended = 0;
-	pm_bu->canary = __pa_symbol(&canary);
-	pm_bu->resume = __pa_symbol(cpu_resume);
+	soc_pm.bu->suspended = 0;
+	soc_pm.bu->canary = __pa_symbol(&canary);
+	soc_pm.bu->resume = __pa_symbol(cpu_resume);
+	if (soc_pm.data.ramc_phy) {
+		of_scan_flat_dt(at91_pm_backup_scan_memcs, &located);
+		if (!located)
+			goto securam_fail;
+
+		/* DDR3PHY_ZQ0SR0 */
+		soc_pm.bu->ddr_phy_calibration[0] = readl(soc_pm.data.ramc_phy +
+							  0x188);
+	}
 
 	return 0;
 
 securam_fail:
 	put_device(&pdev->dev);
-securam_fail_no_ref_dev:
-	iounmap(soc_pm.data.sfrbu);
-	soc_pm.data.sfrbu = NULL;
 	return ret;
 }
 
-static void __init at91_pm_use_default_mode(int pm_mode)
-{
-	if (pm_mode != AT91_PM_ULP1 && pm_mode != AT91_PM_BACKUP)
-		return;
-
-	if (soc_pm.data.standby_mode == pm_mode)
-		soc_pm.data.standby_mode = AT91_PM_ULP0;
-	if (soc_pm.data.suspend_mode == pm_mode)
-		soc_pm.data.suspend_mode = AT91_PM_ULP0;
-}
-
 static const struct of_device_id atmel_shdwc_ids[] = {
 	{ .compatible = "atmel,sama5d2-shdwc" },
 	{ .compatible = "microchip,sam9x60-shdwc" },
+	{ .compatible = "microchip,sama7g5-shdwc" },
 	{ /* sentinel. */ }
 };
 
-static void __init at91_pm_modes_init(void)
+static void __init at91_pm_modes_init(const u32 *maps, int len)
 {
 	struct device_node *np;
-	int ret;
+	int ret, mode;
 
-	if (!at91_is_pm_mode_active(AT91_PM_BACKUP) &&
-	    !at91_is_pm_mode_active(AT91_PM_ULP1))
-		return;
+	ret = at91_pm_backup_init();
+	if (ret) {
+		if (soc_pm.data.standby_mode == AT91_PM_BACKUP)
+			soc_pm.data.standby_mode = AT91_PM_ULP0;
+		if (soc_pm.data.suspend_mode == AT91_PM_BACKUP)
+			soc_pm.data.suspend_mode = AT91_PM_ULP0;
+	}
 
-	np = of_find_matching_node(NULL, atmel_shdwc_ids);
-	if (!np) {
-		pr_warn("%s: failed to find shdwc!\n", __func__);
-		goto ulp1_default;
+	if (maps[soc_pm.data.standby_mode] & AT91_PM_IOMAP(SHDWC) ||
+	    maps[soc_pm.data.suspend_mode] & AT91_PM_IOMAP(SHDWC)) {
+		np = of_find_matching_node(NULL, atmel_shdwc_ids);
+		if (!np) {
+			pr_warn("%s: failed to find shdwc!\n", __func__);
+
+			/* Use ULP0 if it doesn't needs SHDWC.*/
+			if (!(maps[AT91_PM_ULP0] & AT91_PM_IOMAP(SHDWC)))
+				mode = AT91_PM_ULP0;
+			else
+				mode = AT91_PM_STANDBY;
+
+			if (maps[soc_pm.data.standby_mode] & AT91_PM_IOMAP(SHDWC))
+				soc_pm.data.standby_mode = mode;
+			if (maps[soc_pm.data.suspend_mode] & AT91_PM_IOMAP(SHDWC))
+				soc_pm.data.suspend_mode = mode;
+		} else {
+			soc_pm.data.shdwc = of_iomap(np, 0);
+			of_node_put(np);
+		}
 	}
 
-	soc_pm.data.shdwc = of_iomap(np, 0);
-	of_node_put(np);
+	if (maps[soc_pm.data.standby_mode] & AT91_PM_IOMAP(SFRBU) ||
+	    maps[soc_pm.data.suspend_mode] & AT91_PM_IOMAP(SFRBU)) {
+		np = of_find_compatible_node(NULL, NULL, "atmel,sama5d2-sfrbu");
+		if (!np) {
+			pr_warn("%s: failed to find sfrbu!\n", __func__);
+
+			/*
+			 * Use ULP0 if it doesn't need SHDWC or if SHDWC
+			 * was already located.
+			 */
+			if (!(maps[AT91_PM_ULP0] & AT91_PM_IOMAP(SHDWC)) ||
+			    soc_pm.data.shdwc)
+				mode = AT91_PM_ULP0;
+			else
+				mode = AT91_PM_STANDBY;
+
+			if (maps[soc_pm.data.standby_mode] & AT91_PM_IOMAP(SFRBU))
+				soc_pm.data.standby_mode = mode;
+			if (maps[soc_pm.data.suspend_mode] & AT91_PM_IOMAP(SFRBU))
+				soc_pm.data.suspend_mode = mode;
+		} else {
+			soc_pm.data.sfrbu = of_iomap(np, 0);
+			of_node_put(np);
+		}
+	}
 
-	ret = at91_pm_backup_init();
-	if (ret) {
-		if (!at91_is_pm_mode_active(AT91_PM_ULP1))
-			goto unmap;
-		else
-			goto backup_default;
+	/* Unmap all unnecessary. */
+	if (soc_pm.data.shdwc &&
+	    !(maps[soc_pm.data.standby_mode] & AT91_PM_IOMAP(SHDWC) ||
+	      maps[soc_pm.data.suspend_mode] & AT91_PM_IOMAP(SHDWC))) {
+		iounmap(soc_pm.data.shdwc);
+		soc_pm.data.shdwc = NULL;
 	}
 
-	return;
+	if (soc_pm.data.sfrbu &&
+	    !(maps[soc_pm.data.standby_mode] & AT91_PM_IOMAP(SFRBU) ||
+	      maps[soc_pm.data.suspend_mode] & AT91_PM_IOMAP(SFRBU))) {
+		iounmap(soc_pm.data.sfrbu);
+		soc_pm.data.sfrbu = NULL;
+	}
 
-unmap:
-	iounmap(soc_pm.data.shdwc);
-	soc_pm.data.shdwc = NULL;
-ulp1_default:
-	at91_pm_use_default_mode(AT91_PM_ULP1);
-backup_default:
-	at91_pm_use_default_mode(AT91_PM_BACKUP);
+	return;
 }
 
 struct pmc_info {
@@ -764,6 +909,11 @@ static const struct pmc_info pmc_infos[] __initconst = {
 		.mckr = 0x28,
 		.version = AT91_PMC_V2,
 	},
+	{
+		.mckr = 0x28,
+		.version = AT91_PMC_V2,
+	},
+
 };
 
 static const struct of_device_id atmel_pmc_ids[] __initconst = {
@@ -779,6 +929,7 @@ static const struct of_device_id atmel_pmc_ids[] __initconst = {
 	{ .compatible = "atmel,sama5d4-pmc", .data = &pmc_infos[1] },
 	{ .compatible = "atmel,sama5d2-pmc", .data = &pmc_infos[1] },
 	{ .compatible = "microchip,sam9x60-pmc", .data = &pmc_infos[4] },
+	{ .compatible = "microchip,sama7g5-pmc", .data = &pmc_infos[5] },
 	{ /* sentinel */ },
 };
 
@@ -877,7 +1028,7 @@ void __init at91rm9200_pm_init(void)
 	soc_pm.data.standby_mode = AT91_PM_STANDBY;
 	soc_pm.data.suspend_mode = AT91_PM_ULP0;
 
-	at91_dt_ramc();
+	at91_dt_ramc(false);
 
 	/*
 	 * AT91RM9200 SDRAM low-power mode cannot be used with self-refresh.
@@ -892,13 +1043,16 @@ void __init sam9x60_pm_init(void)
 	static const int modes[] __initconst = {
 		AT91_PM_STANDBY, AT91_PM_ULP0, AT91_PM_ULP0_FAST, AT91_PM_ULP1,
 	};
+	static const int iomaps[] __initconst = {
+		[AT91_PM_ULP1]		= AT91_PM_IOMAP(SHDWC),
+	};
 
 	if (!IS_ENABLED(CONFIG_SOC_SAM9X60))
 		return;
 
 	at91_pm_modes_validate(modes, ARRAY_SIZE(modes));
-	at91_pm_modes_init();
-	at91_dt_ramc();
+	at91_pm_modes_init(iomaps, ARRAY_SIZE(iomaps));
+	at91_dt_ramc(false);
 	at91_pm_init(NULL);
 
 	soc_pm.ws_ids = sam9x60_ws_ids;
@@ -918,7 +1072,7 @@ void __init at91sam9_pm_init(void)
 	soc_pm.data.standby_mode = AT91_PM_STANDBY;
 	soc_pm.data.suspend_mode = AT91_PM_ULP0;
 
-	at91_dt_ramc();
+	at91_dt_ramc(false);
 	at91_pm_init(at91sam9_idle);
 }
 
@@ -932,7 +1086,7 @@ void __init sama5_pm_init(void)
 		return;
 
 	at91_pm_modes_validate(modes, ARRAY_SIZE(modes));
-	at91_dt_ramc();
+	at91_dt_ramc(false);
 	at91_pm_init(NULL);
 }
 
@@ -942,13 +1096,18 @@ void __init sama5d2_pm_init(void)
 		AT91_PM_STANDBY, AT91_PM_ULP0, AT91_PM_ULP0_FAST, AT91_PM_ULP1,
 		AT91_PM_BACKUP,
 	};
+	static const u32 iomaps[] __initconst = {
+		[AT91_PM_ULP1]		= AT91_PM_IOMAP(SHDWC),
+		[AT91_PM_BACKUP]	= AT91_PM_IOMAP(SHDWC) |
+					  AT91_PM_IOMAP(SFRBU),
+	};
 
 	if (!IS_ENABLED(CONFIG_SOC_SAMA5D2))
 		return;
 
 	at91_pm_modes_validate(modes, ARRAY_SIZE(modes));
-	at91_pm_modes_init();
-	at91_dt_ramc();
+	at91_pm_modes_init(iomaps, ARRAY_SIZE(iomaps));
+	at91_dt_ramc(false);
 	at91_pm_init(NULL);
 
 	soc_pm.ws_ids = sama5d2_ws_ids;
@@ -956,6 +1115,32 @@ void __init sama5d2_pm_init(void)
 	soc_pm.config_pmc_ws = at91_sama5d2_config_pmc_ws;
 }
 
+void __init sama7_pm_init(void)
+{
+	static const int modes[] __initconst = {
+		AT91_PM_STANDBY, AT91_PM_ULP0, AT91_PM_ULP1, AT91_PM_BACKUP,
+	};
+	static const u32 iomaps[] __initconst = {
+		[AT91_PM_ULP0]		= AT91_PM_IOMAP(SFRBU),
+		[AT91_PM_ULP1]		= AT91_PM_IOMAP(SFRBU) |
+					  AT91_PM_IOMAP(SHDWC),
+		[AT91_PM_BACKUP]	= AT91_PM_IOMAP(SFRBU) |
+					  AT91_PM_IOMAP(SHDWC),
+	};
+
+	if (!IS_ENABLED(CONFIG_SOC_SAMA7))
+		return;
+
+	at91_pm_modes_validate(modes, ARRAY_SIZE(modes));
+
+	at91_dt_ramc(true);
+	at91_pm_modes_init(iomaps, ARRAY_SIZE(iomaps));
+	at91_pm_init(NULL);
+
+	soc_pm.ws_ids = sama7g5_ws_ids;
+	soc_pm.config_pmc_ws = at91_sam9x60_config_pmc_ws;
+}
+
 static int __init at91_pm_modes_select(char *str)
 {
 	char *s;
diff --git a/arch/arm/mach-at91/pm.h b/arch/arm/mach-at91/pm.h
index bfb260be371e..53bdc9000e44 100644
--- a/arch/arm/mach-at91/pm.h
+++ b/arch/arm/mach-at91/pm.h
@@ -12,6 +12,8 @@
 #include <linux/mfd/syscon/atmel-mc.h>
 #include <soc/at91/at91sam9_ddrsdr.h>
 #include <soc/at91/at91sam9_sdramc.h>
+#include <soc/at91/sama7-ddr.h>
+#include <soc/at91/sama7-sfrbu.h>
 
 #define AT91_MEMCTRL_MC		0
 #define AT91_MEMCTRL_SDRAMC	1
@@ -27,6 +29,7 @@
 struct at91_pm_data {
 	void __iomem *pmc;
 	void __iomem *ramc[2];
+	void __iomem *ramc_phy;
 	unsigned long uhp_udp_mask;
 	unsigned int memctrl;
 	unsigned int mode;
diff --git a/arch/arm/mach-at91/pm_data-offsets.c b/arch/arm/mach-at91/pm_data-offsets.c
index 82089ff258c0..40bd4e8fe40a 100644
--- a/arch/arm/mach-at91/pm_data-offsets.c
+++ b/arch/arm/mach-at91/pm_data-offsets.c
@@ -8,6 +8,8 @@ int main(void)
 	DEFINE(PM_DATA_PMC,		offsetof(struct at91_pm_data, pmc));
 	DEFINE(PM_DATA_RAMC0,		offsetof(struct at91_pm_data, ramc[0]));
 	DEFINE(PM_DATA_RAMC1,		offsetof(struct at91_pm_data, ramc[1]));
+	DEFINE(PM_DATA_RAMC_PHY,	offsetof(struct at91_pm_data,
+						 ramc_phy));
 	DEFINE(PM_DATA_MEMCTRL,	offsetof(struct at91_pm_data, memctrl));
 	DEFINE(PM_DATA_MODE,		offsetof(struct at91_pm_data, mode));
 	DEFINE(PM_DATA_SHDWC,		offsetof(struct at91_pm_data, shdwc));
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index b683c2caa40b..cbd61a3bcab1 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -22,39 +22,57 @@ tmp3	.req	r6
 
 /*
  * Wait until master clock is ready (after switching master clock source)
+ *
+ * @r_mckid:	register holding master clock identifier
+ *
+ * Side effects: overwrites r7, r8
  */
-	.macro wait_mckrdy
-1:	ldr	tmp1, [pmc, #AT91_PMC_SR]
-	tst	tmp1, #AT91_PMC_MCKRDY
-	beq	1b
+	.macro wait_mckrdy r_mckid
+#ifdef CONFIG_SOC_SAMA7
+	cmp	\r_mckid, #0
+	beq	1f
+	mov	r7, #AT91_PMC_MCKXRDY
+	b	2f
+#endif
+1:	mov	r7, #AT91_PMC_MCKRDY
+2:	ldr	r8, [pmc, #AT91_PMC_SR]
+	and	r8, r7
+	cmp	r8, r7
+	bne	2b
 	.endm
 
 /*
  * Wait until master oscillator has stabilized.
+ *
+ * Side effects: overwrites r7
  */
 	.macro wait_moscrdy
-1:	ldr	tmp1, [pmc, #AT91_PMC_SR]
-	tst	tmp1, #AT91_PMC_MOSCS
+1:	ldr	r7, [pmc, #AT91_PMC_SR]
+	tst	r7, #AT91_PMC_MOSCS
 	beq	1b
 	.endm
 
 /*
  * Wait for main oscillator selection is done
+ *
+ * Side effects: overwrites r7
  */
 	.macro wait_moscsels
-1:	ldr	tmp1, [pmc, #AT91_PMC_SR]
-	tst	tmp1, #AT91_PMC_MOSCSELS
+1:	ldr	r7, [pmc, #AT91_PMC_SR]
+	tst	r7, #AT91_PMC_MOSCSELS
 	beq	1b
 	.endm
 
 /*
  * Put the processor to enter the idle state
+ *
+ * Side effects: overwrites r7
  */
 	.macro at91_cpu_idle
 
 #if defined(CONFIG_CPU_V7)
-	mov	tmp1, #AT91_PMC_PCK
-	str	tmp1, [pmc, #AT91_PMC_SCDR]
+	mov	r7, #AT91_PMC_PCK
+	str	r7, [pmc, #AT91_PMC_SCDR]
 
 	dsb
 
@@ -65,102 +83,375 @@ tmp3	.req	r6
 
 	.endm
 
+/**
+ * Set state for 2.5V low power regulator
+ * @ena: 0 - disable regulator
+ *	 1 - enable regulator
+ *
+ * Side effects: overwrites r7, r8, r9, r10
+ */
+	.macro at91_2_5V_reg_set_low_power ena
+#ifdef CONFIG_SOC_SAMA7
+	ldr	r7, .sfrbu
+	mov	r8, #\ena
+	ldr	r9, [r7, #AT91_SFRBU_25LDOCR]
+	orr	r9, r9, #AT91_SFRBU_25LDOCR_LP
+	cmp	r8, #1
+	beq	lp_done_\ena
+	bic	r9, r9, #AT91_SFRBU_25LDOCR_LP
+lp_done_\ena:
+	ldr	r10, =AT91_SFRBU_25LDOCR_LDOANAKEY
+	orr	r9, r9, r10
+	str	r9, [r7, #AT91_SFRBU_25LDOCR]
+#endif
+	.endm
+
+	.macro at91_backup_set_lpm reg
+#ifdef CONFIG_SOC_SAMA7
+	orr	\reg, \reg, #0x200000
+#endif
+	.endm
+
 	.text
 
 	.arm
 
-/*
- * void at91_suspend_sram_fn(struct at91_pm_data*)
- * @input param:
- * 	@r0: base address of struct at91_pm_data
+#ifdef CONFIG_SOC_SAMA7
+/**
+ * Enable self-refresh
+ *
+ * Side effects: overwrites r2, r3, tmp1, tmp2, tmp3, r7
  */
-/* at91_pm_suspend_in_sram must be 8-byte aligned per the requirements of fncpy() */
-	.align 3
-ENTRY(at91_pm_suspend_in_sram)
-	/* Save registers on stack */
-	stmfd	sp!, {r4 - r12, lr}
+.macro at91_sramc_self_refresh_ena
+	ldr	r2, .sramc_base
+	ldr	r3, .sramc_phy_base
+	ldr	r7, .pm_mode
 
-	/* Drain write buffer */
+	dsb
+
+	/* Disable all AXI ports. */
+	ldr	tmp1, [r2, #UDDRC_PCTRL_0]
+	bic	tmp1, tmp1, #0x1
+	str	tmp1, [r2, #UDDRC_PCTRL_0]
+
+	ldr	tmp1, [r2, #UDDRC_PCTRL_1]
+	bic	tmp1, tmp1, #0x1
+	str	tmp1, [r2, #UDDRC_PCTRL_1]
+
+	ldr	tmp1, [r2, #UDDRC_PCTRL_2]
+	bic	tmp1, tmp1, #0x1
+	str	tmp1, [r2, #UDDRC_PCTRL_2]
+
+	ldr	tmp1, [r2, #UDDRC_PCTRL_3]
+	bic	tmp1, tmp1, #0x1
+	str	tmp1, [r2, #UDDRC_PCTRL_3]
+
+	ldr	tmp1, [r2, #UDDRC_PCTRL_4]
+	bic	tmp1, tmp1, #0x1
+	str	tmp1, [r2, #UDDRC_PCTRL_4]
+
+sr_ena_1:
+	/* Wait for all ports to disable. */
+	ldr	tmp1, [r2, #UDDRC_PSTAT]
+	ldr	tmp2, =UDDRC_PSTAT_ALL_PORTS
+	tst	tmp1, tmp2
+	bne	sr_ena_1
+
+	/* Switch to self-refresh. */
+	ldr	tmp1, [r2, #UDDRC_PWRCTL]
+	orr	tmp1, tmp1, #UDDRC_PWRCTRL_SELFREF_SW
+	str	tmp1, [r2, #UDDRC_PWRCTL]
+
+sr_ena_2:
+	/* Wait for self-refresh enter. */
+	ldr	tmp1, [r2, #UDDRC_STAT]
+	bic	tmp1, tmp1, #~UDDRC_STAT_SELFREF_TYPE_MSK
+	cmp	tmp1, #UDDRC_STAT_SELFREF_TYPE_SW
+	bne	sr_ena_2
+
+	/* Put DDR PHY's DLL in bypass mode for non-backup modes. */
+	cmp	r7, #AT91_PM_BACKUP
+	beq	sr_ena_3
+	ldr	tmp1, [r3, #DDR3PHY_PIR]
+	orr	tmp1, tmp1, #DDR3PHY_PIR_DLLBYP
+	str	tmp1, [r3, #DDR3PHY_PIR]
+
+sr_ena_3:
+	/* Power down DDR PHY data receivers. */
+	ldr	tmp1, [r3, #DDR3PHY_DXCCR]
+	orr	tmp1, tmp1, #DDR3PHY_DXCCR_DXPDR
+	str	tmp1, [r3, #DDR3PHY_DXCCR]
+
+	/* Power down ADDR/CMD IO. */
+	ldr	tmp1, [r3, #DDR3PHY_ACIOCR]
+	orr	tmp1, tmp1, #DDR3PHY_ACIORC_ACPDD
+	orr	tmp1, tmp1, #DDR3PHY_ACIOCR_CKPDD_CK0
+	orr	tmp1, tmp1, #DDR3PHY_ACIOCR_CSPDD_CS0
+	str	tmp1, [r3, #DDR3PHY_ACIOCR]
+
+	/* Power down ODT. */
+	ldr	tmp1, [r3, #DDR3PHY_DSGCR]
+	orr	tmp1, tmp1, #DDR3PHY_DSGCR_ODTPDD_ODT0
+	str	tmp1, [r3, #DDR3PHY_DSGCR]
+.endm
+
+/**
+ * Disable self-refresh
+ *
+ * Side effects: overwrites r2, r3, tmp1, tmp2, tmp3
+ */
+.macro at91_sramc_self_refresh_dis
+	ldr	r2, .sramc_base
+	ldr	r3, .sramc_phy_base
+
+	/* Power up DDR PHY data receivers. */
+	ldr	tmp1, [r3, #DDR3PHY_DXCCR]
+	bic	tmp1, tmp1, #DDR3PHY_DXCCR_DXPDR
+	str	tmp1, [r3, #DDR3PHY_DXCCR]
+
+	/* Power up the output of CK and CS pins. */
+	ldr	tmp1, [r3, #DDR3PHY_ACIOCR]
+	bic	tmp1, tmp1, #DDR3PHY_ACIORC_ACPDD
+	bic	tmp1, tmp1, #DDR3PHY_ACIOCR_CKPDD_CK0
+	bic	tmp1, tmp1, #DDR3PHY_ACIOCR_CSPDD_CS0
+	str	tmp1, [r3, #DDR3PHY_ACIOCR]
+
+	/* Power up ODT. */
+	ldr	tmp1, [r3, #DDR3PHY_DSGCR]
+	bic	tmp1, tmp1, #DDR3PHY_DSGCR_ODTPDD_ODT0
+	str	tmp1, [r3, #DDR3PHY_DSGCR]
+
+	/* Take DDR PHY's DLL out of bypass mode. */
+	ldr	tmp1, [r3, #DDR3PHY_PIR]
+	bic	tmp1, tmp1, #DDR3PHY_PIR_DLLBYP
+	str	tmp1, [r3, #DDR3PHY_PIR]
+
+	/* Enable quasi-dynamic programming. */
 	mov	tmp1, #0
-	mcr	p15, 0, tmp1, c7, c10, 4
+	str	tmp1, [r2, #UDDRC_SWCTRL]
+
+	/* De-assert SDRAM initialization. */
+	ldr	tmp1, [r2, #UDDRC_DFIMISC]
+	bic	tmp1, tmp1, #UDDRC_DFIMISC_DFI_INIT_COMPLETE_EN
+	str	tmp1, [r2, #UDDRC_DFIMISC]
+
+	/* Quasi-dynamic programming done. */
+	mov	tmp1, #UDDRC_SWCTRL_SW_DONE
+	str	tmp1, [r2, #UDDRC_SWCTRL]
+
+sr_dis_1:
+	ldr	tmp1, [r2, #UDDRC_SWSTAT]
+	tst	tmp1, #UDDRC_SWSTAT_SW_DONE_ACK
+	beq	sr_dis_1
+
+	/* DLL soft-reset + DLL lock wait + ITM reset */
+	mov	tmp1, #(DDR3PHY_PIR_INIT | DDR3PHY_PIR_DLLSRST | \
+			DDR3PHY_PIR_DLLLOCK | DDR3PHY_PIR_ITMSRST)
+	str	tmp1, [r3, #DDR3PHY_PIR]
+
+sr_dis_4:
+	/* Wait for it. */
+	ldr	tmp1, [r3, #DDR3PHY_PGSR]
+	tst	tmp1, #DDR3PHY_PGSR_IDONE
+	beq	sr_dis_4
+
+	/* Enable quasi-dynamic programming. */
+	mov	tmp1, #0
+	str	tmp1, [r2, #UDDRC_SWCTRL]
+
+	/* Assert PHY init complete enable signal. */
+	ldr	tmp1, [r2, #UDDRC_DFIMISC]
+	orr	tmp1, tmp1, #UDDRC_DFIMISC_DFI_INIT_COMPLETE_EN
+	str	tmp1, [r2, #UDDRC_DFIMISC]
+
+	/* Programming is done. Set sw_done. */
+	mov	tmp1, #UDDRC_SWCTRL_SW_DONE
+	str	tmp1, [r2, #UDDRC_SWCTRL]
+
+sr_dis_5:
+	/* Wait for it. */
+	ldr	tmp1, [r2, #UDDRC_SWSTAT]
+	tst	tmp1, #UDDRC_SWSTAT_SW_DONE_ACK
+	beq	sr_dis_5
+
+	/* Trigger self-refresh exit. */
+	ldr	tmp1, [r2, #UDDRC_PWRCTL]
+	bic	tmp1, tmp1, #UDDRC_PWRCTRL_SELFREF_SW
+	str	tmp1, [r2, #UDDRC_PWRCTL]
+
+sr_dis_6:
+	/* Wait for self-refresh exit done. */
+	ldr	tmp1, [r2, #UDDRC_STAT]
+	bic	tmp1, tmp1, #~UDDRC_STAT_OPMODE_MSK
+	cmp	tmp1, #UDDRC_STAT_OPMODE_NORMAL
+	bne	sr_dis_6
+
+	/* Enable all AXI ports. */
+	ldr	tmp1, [r2, #UDDRC_PCTRL_0]
+	orr	tmp1, tmp1, #0x1
+	str	tmp1, [r2, #UDDRC_PCTRL_0]
+
+	ldr	tmp1, [r2, #UDDRC_PCTRL_1]
+	orr	tmp1, tmp1, #0x1
+	str	tmp1, [r2, #UDDRC_PCTRL_1]
+
+	ldr	tmp1, [r2, #UDDRC_PCTRL_2]
+	orr	tmp1, tmp1, #0x1
+	str	tmp1, [r2, #UDDRC_PCTRL_2]
+
+	ldr	tmp1, [r2, #UDDRC_PCTRL_3]
+	orr	tmp1, tmp1, #0x1
+	str	tmp1, [r2, #UDDRC_PCTRL_3]
+
+	ldr	tmp1, [r2, #UDDRC_PCTRL_4]
+	orr	tmp1, tmp1, #0x1
+	str	tmp1, [r2, #UDDRC_PCTRL_4]
 
-	ldr	tmp1, [r0, #PM_DATA_PMC]
-	str	tmp1, .pmc_base
-	ldr	tmp1, [r0, #PM_DATA_RAMC0]
-	str	tmp1, .sramc_base
-	ldr	tmp1, [r0, #PM_DATA_RAMC1]
-	str	tmp1, .sramc1_base
-	ldr	tmp1, [r0, #PM_DATA_MEMCTRL]
-	str	tmp1, .memtype
-	ldr	tmp1, [r0, #PM_DATA_MODE]
-	str	tmp1, .pm_mode
-	ldr	tmp1, [r0, #PM_DATA_PMC_MCKR_OFFSET]
-	str	tmp1, .mckr_offset
-	ldr	tmp1, [r0, #PM_DATA_PMC_VERSION]
-	str	tmp1, .pmc_version
-	/* Both ldrne below are here to preload their address in the TLB */
-	ldr	tmp1, [r0, #PM_DATA_SHDWC]
-	str	tmp1, .shdwc
-	cmp	tmp1, #0
-	ldrne	tmp2, [tmp1, #0]
-	ldr	tmp1, [r0, #PM_DATA_SFRBU]
-	str	tmp1, .sfrbu
-	cmp	tmp1, #0
-	ldrne	tmp2, [tmp1, #0x10]
+	dsb
+.endm
+#else
+/**
+ * Enable self-refresh
+ *
+ * register usage:
+ * 	@r1: memory type
+ *	@r2: base address of the sram controller
+ *	@r3: temporary
+ */
+.macro at91_sramc_self_refresh_ena
+	ldr	r1, .memtype
+	ldr	r2, .sramc_base
 
-	/* Active the self-refresh mode */
-	mov	r0, #SRAMC_SELF_FRESH_ACTIVE
-	bl	at91_sramc_self_refresh
+	cmp	r1, #AT91_MEMCTRL_MC
+	bne	sr_ena_ddrc_sf
 
-	ldr	r0, .pm_mode
-	cmp	r0, #AT91_PM_STANDBY
-	beq	standby
-	cmp	r0, #AT91_PM_BACKUP
-	beq	backup_mode
+	/* Active SDRAM self-refresh mode */
+	mov	r3, #1
+	str	r3, [r2, #AT91_MC_SDRAMC_SRR]
+	b	sr_ena_exit
 
-	bl	at91_ulp_mode
-	b	exit_suspend
+sr_ena_ddrc_sf:
+	cmp	r1, #AT91_MEMCTRL_DDRSDR
+	bne	sr_ena_sdramc_sf
 
-standby:
-	/* Wait for interrupt */
-	ldr	pmc, .pmc_base
-	at91_cpu_idle
-	b	exit_suspend
+	/*
+	 * DDR Memory controller
+	 */
 
-backup_mode:
-	bl	at91_backup_mode
-	b	exit_suspend
+	/* LPDDR1 --> force DDR2 mode during self-refresh */
+	ldr	r3, [r2, #AT91_DDRSDRC_MDR]
+	str	r3, .saved_sam9_mdr
+	bic	r3, r3, #~AT91_DDRSDRC_MD
+	cmp	r3, #AT91_DDRSDRC_MD_LOW_POWER_DDR
+	ldreq	r3, [r2, #AT91_DDRSDRC_MDR]
+	biceq	r3, r3, #AT91_DDRSDRC_MD
+	orreq	r3, r3, #AT91_DDRSDRC_MD_DDR2
+	streq	r3, [r2, #AT91_DDRSDRC_MDR]
 
-exit_suspend:
-	/* Exit the self-refresh mode */
-	mov	r0, #SRAMC_SELF_FRESH_EXIT
-	bl	at91_sramc_self_refresh
+	/* Active DDRC self-refresh mode */
+	ldr	r3, [r2, #AT91_DDRSDRC_LPR]
+	str	r3, .saved_sam9_lpr
+	bic	r3, r3, #AT91_DDRSDRC_LPCB
+	orr	r3, r3, #AT91_DDRSDRC_LPCB_SELF_REFRESH
+	str	r3, [r2, #AT91_DDRSDRC_LPR]
 
-	/* Restore registers, and return */
-	ldmfd	sp!, {r4 - r12, pc}
-ENDPROC(at91_pm_suspend_in_sram)
+	/* If using the 2nd ddr controller */
+	ldr	r2, .sramc1_base
+	cmp	r2, #0
+	beq	sr_ena_no_2nd_ddrc
 
-ENTRY(at91_backup_mode)
-	/* Switch the master clock source to slow clock. */
-	ldr	pmc, .pmc_base
-	ldr	tmp2, .mckr_offset
-	ldr	tmp1, [pmc, tmp2]
-	bic	tmp1, tmp1, #AT91_PMC_CSS
-	str	tmp1, [pmc, tmp2]
+	ldr	r3, [r2, #AT91_DDRSDRC_MDR]
+	str	r3, .saved_sam9_mdr1
+	bic	r3, r3, #~AT91_DDRSDRC_MD
+	cmp	r3, #AT91_DDRSDRC_MD_LOW_POWER_DDR
+	ldreq	r3, [r2, #AT91_DDRSDRC_MDR]
+	biceq	r3, r3, #AT91_DDRSDRC_MD
+	orreq	r3, r3, #AT91_DDRSDRC_MD_DDR2
+	streq	r3, [r2, #AT91_DDRSDRC_MDR]
 
-	wait_mckrdy
+	/* Active DDRC self-refresh mode */
+	ldr	r3, [r2, #AT91_DDRSDRC_LPR]
+	str	r3, .saved_sam9_lpr1
+	bic	r3, r3, #AT91_DDRSDRC_LPCB
+	orr	r3, r3, #AT91_DDRSDRC_LPCB_SELF_REFRESH
+	str	r3, [r2, #AT91_DDRSDRC_LPR]
 
-	/*BUMEN*/
-	ldr	r0, .sfrbu
-	mov	tmp1, #0x1
-	str	tmp1, [r0, #0x10]
+sr_ena_no_2nd_ddrc:
+	b	sr_ena_exit
 
-	/* Shutdown */
-	ldr	r0, .shdwc
-	mov	tmp1, #0xA5000000
-	add	tmp1, tmp1, #0x1
-	str	tmp1, [r0, #0]
-ENDPROC(at91_backup_mode)
+	/*
+	 * SDRAMC Memory controller
+	 */
+sr_ena_sdramc_sf:
+	/* Active SDRAMC self-refresh mode */
+	ldr	r3, [r2, #AT91_SDRAMC_LPR]
+	str	r3, .saved_sam9_lpr
+	bic	r3, r3, #AT91_SDRAMC_LPCB
+	orr	r3, r3, #AT91_SDRAMC_LPCB_SELF_REFRESH
+	str	r3, [r2, #AT91_SDRAMC_LPR]
+
+	ldr	r3, .saved_sam9_lpr
+	str	r3, [r2, #AT91_SDRAMC_LPR]
+
+sr_ena_exit:
+.endm
+
+/**
+ * Disable self-refresh
+ *
+ * register usage:
+ * 	@r1: memory type
+ *	@r2: base address of the sram controller
+ *	@r3: temporary
+ */
+.macro at91_sramc_self_refresh_dis
+	ldr	r1, .memtype
+	ldr	r2, .sramc_base
+
+	cmp	r1, #AT91_MEMCTRL_MC
+	bne	sr_dis_ddrc_exit_sf
+
+	/*
+	 * at91rm9200 Memory controller
+	 */
+
+	 /*
+	  * For exiting the self-refresh mode, do nothing,
+	  * automatically exit the self-refresh mode.
+	  */
+	b	sr_dis_exit
+
+sr_dis_ddrc_exit_sf:
+	cmp	r1, #AT91_MEMCTRL_DDRSDR
+	bne	sdramc_exit_sf
+
+	/* DDR Memory controller */
+
+	/* Restore MDR in case of LPDDR1 */
+	ldr	r3, .saved_sam9_mdr
+	str	r3, [r2, #AT91_DDRSDRC_MDR]
+	/* Restore LPR on AT91 with DDRAM */
+	ldr	r3, .saved_sam9_lpr
+	str	r3, [r2, #AT91_DDRSDRC_LPR]
+
+	/* If using the 2nd ddr controller */
+	ldr	r2, .sramc1_base
+	cmp	r2, #0
+	ldrne	r3, .saved_sam9_mdr1
+	strne	r3, [r2, #AT91_DDRSDRC_MDR]
+	ldrne	r3, .saved_sam9_lpr1
+	strne	r3, [r2, #AT91_DDRSDRC_LPR]
+
+	b	sr_dis_exit
+
+sdramc_exit_sf:
+	/* SDRAMC Memory controller */
+	ldr	r3, .saved_sam9_lpr
+	str	r3, [r2, #AT91_SDRAMC_LPR]
+
+sr_dis_exit:
+.endm
+#endif
 
 .macro at91_pm_ulp0_mode
 	ldr	pmc, .pmc_base
@@ -176,7 +467,9 @@ ENDPROC(at91_backup_mode)
 	bic	tmp1, tmp1, #AT91_PMC_PRES
 	orr	tmp1, tmp1, #AT91_PMC_PRES_64
 	str	tmp1, [pmc, tmp3]
-	wait_mckrdy
+
+	mov	tmp3, #0
+	wait_mckrdy tmp3
 	b	1f
 
 0:
@@ -212,10 +505,13 @@ ENDPROC(at91_backup_mode)
 	bne	5f
 
 	/* Set lowest prescaler for fast resume. */
+	ldr	tmp3, .mckr_offset
 	ldr	tmp1, [pmc, tmp3]
 	bic	tmp1, tmp1, #AT91_PMC_PRES
 	str	tmp1, [pmc, tmp3]
-	wait_mckrdy
+
+	mov	tmp3, #0
+	wait_mckrdy tmp3
 	b	6f
 
 5:	/* Restore RC oscillator state */
@@ -252,6 +548,7 @@ ENDPROC(at91_backup_mode)
 .macro at91_pm_ulp1_mode
 	ldr	pmc, .pmc_base
 	ldr	tmp2, .mckr_offset
+	mov	tmp3, #0
 
 	/* Save RC oscillator state and check if it is enabled. */
 	ldr	tmp1, [pmc, #AT91_PMC_SR]
@@ -293,7 +590,7 @@ ENDPROC(at91_backup_mode)
 	orr	tmp1, tmp1, #AT91_PMC_CSS_MAIN
 	str	tmp1, [pmc, tmp2]
 
-	wait_mckrdy
+	wait_mckrdy tmp3
 
 	/* Enter the ULP1 mode by set WAITMODE bit in CKGR_MOR */
 	ldr	tmp1, [pmc, #AT91_CKGR_MOR]
@@ -306,7 +603,7 @@ ENDPROC(at91_backup_mode)
 	nop
 	nop
 
-	wait_mckrdy
+	wait_mckrdy tmp3
 
 	/* Enable the crystal oscillator */
 	ldr	tmp1, [pmc, #AT91_CKGR_MOR]
@@ -322,7 +619,7 @@ ENDPROC(at91_backup_mode)
 	bic	tmp1, tmp1, #AT91_PMC_CSS
 	str	tmp1, [pmc, tmp2]
 
-	wait_mckrdy
+	wait_mckrdy tmp3
 
 	/* Switch main clock source to crystal oscillator */
 	ldr	tmp1, [pmc, #AT91_CKGR_MOR]
@@ -339,7 +636,7 @@ ENDPROC(at91_backup_mode)
 	orr	tmp1, tmp1, #AT91_PMC_CSS_MAIN
 	str	tmp1, [pmc, tmp2]
 
-	wait_mckrdy
+	wait_mckrdy tmp3
 
 	/* Restore RC oscillator state */
 	ldr	tmp1, .saved_osc_status
@@ -367,7 +664,7 @@ ENDPROC(at91_backup_mode)
 	cmp	tmp1, #AT91_PMC_V1
 	beq	1f
 
-#ifdef CONFIG_SOC_SAM9X60
+#ifdef CONFIG_HAVE_AT91_SAM9X60_PLL
 	/* Save PLLA settings. */
 	ldr	tmp2, [pmc, #AT91_PMC_PLL_UPDT]
 	bic	tmp2, tmp2, #AT91_PMC_PLL_UPDT_ID
@@ -434,7 +731,7 @@ ENDPROC(at91_backup_mode)
 	cmp	tmp3, #AT91_PMC_V1
 	beq	4f
 
-#ifdef CONFIG_SOC_SAM9X60
+#ifdef CONFIG_HAVE_AT91_SAM9X60_PLL
 	/* step 1. */
 	ldr	tmp1, [pmc, #AT91_PMC_PLL_UPDT]
 	bic	tmp1, tmp1, #AT91_PMC_PLL_UPDT_ID
@@ -497,7 +794,122 @@ ENDPROC(at91_backup_mode)
 2:
 .endm
 
-ENTRY(at91_ulp_mode)
+/**
+ * at91_mckx_ps_enable:	save MCK1..4 settings and switch it to main clock
+ *
+ * Side effects: overwrites tmp1, tmp2
+ */
+.macro at91_mckx_ps_enable
+#ifdef CONFIG_SOC_SAMA7
+	ldr	pmc, .pmc_base
+
+	/* There are 4 MCKs we need to handle: MCK1..4 */
+	mov	tmp1, #1
+e_loop:	cmp	tmp1, #5
+	beq	e_done
+
+	/* Write MCK ID to retrieve the settings. */
+	str	tmp1, [pmc, #AT91_PMC_MCR_V2]
+	ldr	tmp2, [pmc, #AT91_PMC_MCR_V2]
+
+e_save_mck1:
+	cmp	tmp1, #1
+	bne	e_save_mck2
+	str	tmp2, .saved_mck1
+	b	e_ps
+
+e_save_mck2:
+	cmp	tmp1, #2
+	bne	e_save_mck3
+	str	tmp2, .saved_mck2
+	b	e_ps
+
+e_save_mck3:
+	cmp	tmp1, #3
+	bne	e_save_mck4
+	str	tmp2, .saved_mck3
+	b	e_ps
+
+e_save_mck4:
+	str	tmp2, .saved_mck4
+
+e_ps:
+	/* Use CSS=MAINCK and DIV=1. */
+	bic	tmp2, tmp2, #AT91_PMC_MCR_V2_CSS
+	bic	tmp2, tmp2, #AT91_PMC_MCR_V2_DIV
+	orr	tmp2, tmp2, #AT91_PMC_MCR_V2_CSS_MAINCK
+	orr	tmp2, tmp2, #AT91_PMC_MCR_V2_DIV1
+	str	tmp2, [pmc, #AT91_PMC_MCR_V2]
+
+	wait_mckrdy tmp1
+
+	add	tmp1, tmp1, #1
+	b	e_loop
+
+e_done:
+#endif
+.endm
+
+/**
+ * at91_mckx_ps_restore: restore MCK1..4 settings
+ *
+ * Side effects: overwrites tmp1, tmp2
+ */
+.macro at91_mckx_ps_restore
+#ifdef CONFIG_SOC_SAMA7
+	ldr	pmc, .pmc_base
+
+	/* There are 4 MCKs we need to handle: MCK1..4 */
+	mov	tmp1, #1
+r_loop:	cmp	tmp1, #5
+	beq	r_done
+
+r_save_mck1:
+	cmp	tmp1, #1
+	bne	r_save_mck2
+	ldr	tmp2, .saved_mck1
+	b	r_ps
+
+r_save_mck2:
+	cmp	tmp1, #2
+	bne	r_save_mck3
+	ldr	tmp2, .saved_mck2
+	b	r_ps
+
+r_save_mck3:
+	cmp	tmp1, #3
+	bne	r_save_mck4
+	ldr	tmp2, .saved_mck3
+	b	r_ps
+
+r_save_mck4:
+	ldr	tmp2, .saved_mck4
+
+r_ps:
+	/* Write MCK ID to retrieve the settings. */
+	str	tmp1, [pmc, #AT91_PMC_MCR_V2]
+	ldr	tmp3, [pmc, #AT91_PMC_MCR_V2]
+
+	/* We need to restore CSS and DIV. */
+	bic	tmp3, tmp3, #AT91_PMC_MCR_V2_CSS
+	bic	tmp3, tmp3, #AT91_PMC_MCR_V2_DIV
+	orr	tmp3, tmp3, tmp2
+	bic	tmp3, tmp3, #AT91_PMC_MCR_V2_ID_MSK
+	orr	tmp3, tmp3, tmp1
+	orr	tmp3, tmp3, #AT91_PMC_MCR_V2_CMD
+	str	tmp2, [pmc, #AT91_PMC_MCR_V2]
+
+	wait_mckrdy tmp1
+
+	add	tmp1, tmp1, #1
+	b	r_loop
+r_done:
+#endif
+.endm
+
+.macro at91_ulp_mode
+	at91_mckx_ps_enable
+
 	ldr	pmc, .pmc_base
 	ldr	tmp2, .mckr_offset
 	ldr	tmp3, .pm_mode
@@ -518,10 +930,15 @@ ENTRY(at91_ulp_mode)
 save_mck:
 	str	tmp1, [pmc, tmp2]
 
-	wait_mckrdy
+	mov	tmp3, #0
+	wait_mckrdy tmp3
 
 	at91_plla_disable
 
+	/* Enable low power mode for 2.5V regulator. */
+	at91_2_5V_reg_set_low_power 1
+
+	ldr	tmp3, .pm_mode
 	cmp	tmp3, #AT91_PM_ULP1
 	beq	ulp1_mode
 
@@ -533,6 +950,9 @@ ulp1_mode:
 	b	ulp_exit
 
 ulp_exit:
+	/* Disable low power mode for 2.5V regulator. */
+	at91_2_5V_reg_set_low_power 0
+
 	ldr	pmc, .pmc_base
 
 	at91_plla_enable
@@ -544,135 +964,110 @@ ulp_exit:
 	ldr	tmp2, .saved_mckr
 	str	tmp2, [pmc, tmp1]
 
-	wait_mckrdy
-
-	mov	pc, lr
-ENDPROC(at91_ulp_mode)
+	mov	tmp3, #0
+	wait_mckrdy tmp3
 
-/*
- * void at91_sramc_self_refresh(unsigned int is_active)
- *
- * @input param:
- *	@r0: 1 - active self-refresh mode
- *	     0 - exit self-refresh mode
- * register usage:
- * 	@r1: memory type
- *	@r2: base address of the sram controller
- */
-
-ENTRY(at91_sramc_self_refresh)
-	ldr	r1, .memtype
-	ldr	r2, .sramc_base
-
-	cmp	r1, #AT91_MEMCTRL_MC
-	bne	ddrc_sf
-
-	/*
-	 * at91rm9200 Memory controller
-	 */
-
-	 /*
-	  * For exiting the self-refresh mode, do nothing,
-	  * automatically exit the self-refresh mode.
-	  */
-	tst	r0, #SRAMC_SELF_FRESH_ACTIVE
-	beq	exit_sramc_sf
-
-	/* Active SDRAM self-refresh mode */
-	mov	r3, #1
-	str	r3, [r2, #AT91_MC_SDRAMC_SRR]
-	b	exit_sramc_sf
+	at91_mckx_ps_restore
+.endm
 
-ddrc_sf:
-	cmp	r1, #AT91_MEMCTRL_DDRSDR
-	bne	sdramc_sf
+.macro at91_backup_mode
+	/* Switch the master clock source to slow clock. */
+	ldr	pmc, .pmc_base
+	ldr	tmp2, .mckr_offset
+	ldr	tmp1, [pmc, tmp2]
+	bic	tmp1, tmp1, #AT91_PMC_CSS
+	str	tmp1, [pmc, tmp2]
 
-	/*
-	 * DDR Memory controller
-	 */
-	tst	r0, #SRAMC_SELF_FRESH_ACTIVE
-	beq	ddrc_exit_sf
+	mov	tmp3, #0
+	wait_mckrdy tmp3
 
-	/* LPDDR1 --> force DDR2 mode during self-refresh */
-	ldr	r3, [r2, #AT91_DDRSDRC_MDR]
-	str	r3, .saved_sam9_mdr
-	bic	r3, r3, #~AT91_DDRSDRC_MD
-	cmp	r3, #AT91_DDRSDRC_MD_LOW_POWER_DDR
-	ldreq	r3, [r2, #AT91_DDRSDRC_MDR]
-	biceq	r3, r3, #AT91_DDRSDRC_MD
-	orreq	r3, r3, #AT91_DDRSDRC_MD_DDR2
-	streq	r3, [r2, #AT91_DDRSDRC_MDR]
+	/*BUMEN*/
+	ldr	r0, .sfrbu
+	mov	tmp1, #0x1
+	str	tmp1, [r0, #0x10]
 
-	/* Active DDRC self-refresh mode */
-	ldr	r3, [r2, #AT91_DDRSDRC_LPR]
-	str	r3, .saved_sam9_lpr
-	bic	r3, r3, #AT91_DDRSDRC_LPCB
-	orr	r3, r3, #AT91_DDRSDRC_LPCB_SELF_REFRESH
-	str	r3, [r2, #AT91_DDRSDRC_LPR]
+	/* Wait for it. */
+1:	ldr	tmp1, [r0, #0x10]
+	tst	tmp1, #0x1
+	beq	1b
 
-	/* If using the 2nd ddr controller */
-	ldr	r2, .sramc1_base
-	cmp	r2, #0
-	beq	no_2nd_ddrc
+	/* Shutdown */
+	ldr	r0, .shdwc
+	mov	tmp1, #0xA5000000
+	add	tmp1, tmp1, #0x1
+	at91_backup_set_lpm tmp1
+	str	tmp1, [r0, #0]
+.endm
 
-	ldr	r3, [r2, #AT91_DDRSDRC_MDR]
-	str	r3, .saved_sam9_mdr1
-	bic	r3, r3, #~AT91_DDRSDRC_MD
-	cmp	r3, #AT91_DDRSDRC_MD_LOW_POWER_DDR
-	ldreq	r3, [r2, #AT91_DDRSDRC_MDR]
-	biceq	r3, r3, #AT91_DDRSDRC_MD
-	orreq	r3, r3, #AT91_DDRSDRC_MD_DDR2
-	streq	r3, [r2, #AT91_DDRSDRC_MDR]
+/*
+ * void at91_suspend_sram_fn(struct at91_pm_data*)
+ * @input param:
+ * 	@r0: base address of struct at91_pm_data
+ */
+/* at91_pm_suspend_in_sram must be 8-byte aligned per the requirements of fncpy() */
+	.align 3
+ENTRY(at91_pm_suspend_in_sram)
+	/* Save registers on stack */
+	stmfd	sp!, {r4 - r12, lr}
 
-	/* Active DDRC self-refresh mode */
-	ldr	r3, [r2, #AT91_DDRSDRC_LPR]
-	str	r3, .saved_sam9_lpr1
-	bic	r3, r3, #AT91_DDRSDRC_LPCB
-	orr	r3, r3, #AT91_DDRSDRC_LPCB_SELF_REFRESH
-	str	r3, [r2, #AT91_DDRSDRC_LPR]
+	/* Drain write buffer */
+	mov	tmp1, #0
+	mcr	p15, 0, tmp1, c7, c10, 4
 
-no_2nd_ddrc:
-	b	exit_sramc_sf
+	ldr	tmp1, [r0, #PM_DATA_PMC]
+	str	tmp1, .pmc_base
+	ldr	tmp1, [r0, #PM_DATA_RAMC0]
+	str	tmp1, .sramc_base
+	ldr	tmp1, [r0, #PM_DATA_RAMC1]
+	str	tmp1, .sramc1_base
+	ldr	tmp1, [r0, #PM_DATA_RAMC_PHY]
+	str	tmp1, .sramc_phy_base
+	ldr	tmp1, [r0, #PM_DATA_MEMCTRL]
+	str	tmp1, .memtype
+	ldr	tmp1, [r0, #PM_DATA_MODE]
+	str	tmp1, .pm_mode
+	ldr	tmp1, [r0, #PM_DATA_PMC_MCKR_OFFSET]
+	str	tmp1, .mckr_offset
+	ldr	tmp1, [r0, #PM_DATA_PMC_VERSION]
+	str	tmp1, .pmc_version
+	/* Both ldrne below are here to preload their address in the TLB */
+	ldr	tmp1, [r0, #PM_DATA_SHDWC]
+	str	tmp1, .shdwc
+	cmp	tmp1, #0
+	ldrne	tmp2, [tmp1, #0]
+	ldr	tmp1, [r0, #PM_DATA_SFRBU]
+	str	tmp1, .sfrbu
+	cmp	tmp1, #0
+	ldrne	tmp2, [tmp1, #0x10]
 
-ddrc_exit_sf:
-	/* Restore MDR in case of LPDDR1 */
-	ldr	r3, .saved_sam9_mdr
-	str	r3, [r2, #AT91_DDRSDRC_MDR]
-	/* Restore LPR on AT91 with DDRAM */
-	ldr	r3, .saved_sam9_lpr
-	str	r3, [r2, #AT91_DDRSDRC_LPR]
+	/* Active the self-refresh mode */
+	at91_sramc_self_refresh_ena
 
-	/* If using the 2nd ddr controller */
-	ldr	r2, .sramc1_base
-	cmp	r2, #0
-	ldrne	r3, .saved_sam9_mdr1
-	strne	r3, [r2, #AT91_DDRSDRC_MDR]
-	ldrne	r3, .saved_sam9_lpr1
-	strne	r3, [r2, #AT91_DDRSDRC_LPR]
+	ldr	r0, .pm_mode
+	cmp	r0, #AT91_PM_STANDBY
+	beq	standby
+	cmp	r0, #AT91_PM_BACKUP
+	beq	backup_mode
 
-	b	exit_sramc_sf
+	at91_ulp_mode
+	b	exit_suspend
 
-	/*
-	 * SDRAMC Memory controller
-	 */
-sdramc_sf:
-	tst	r0, #SRAMC_SELF_FRESH_ACTIVE
-	beq	sdramc_exit_sf
+standby:
+	/* Wait for interrupt */
+	ldr	pmc, .pmc_base
+	at91_cpu_idle
+	b	exit_suspend
 
-	/* Active SDRAMC self-refresh mode */
-	ldr	r3, [r2, #AT91_SDRAMC_LPR]
-	str	r3, .saved_sam9_lpr
-	bic	r3, r3, #AT91_SDRAMC_LPCB
-	orr	r3, r3, #AT91_SDRAMC_LPCB_SELF_REFRESH
-	str	r3, [r2, #AT91_SDRAMC_LPR]
+backup_mode:
+	at91_backup_mode
 
-sdramc_exit_sf:
-	ldr	r3, .saved_sam9_lpr
-	str	r3, [r2, #AT91_SDRAMC_LPR]
+exit_suspend:
+	/* Exit the self-refresh mode */
+	at91_sramc_self_refresh_dis
 
-exit_sramc_sf:
-	mov	pc, lr
-ENDPROC(at91_sramc_self_refresh)
+	/* Restore registers, and return */
+	ldmfd	sp!, {r4 - r12, pc}
+ENDPROC(at91_pm_suspend_in_sram)
 
 .pmc_base:
 	.word 0
@@ -680,6 +1075,8 @@ ENDPROC(at91_sramc_self_refresh)
 	.word 0
 .sramc1_base:
 	.word 0
+.sramc_phy_base:
+	.word 0
 .shdwc:
 	.word 0
 .sfrbu:
@@ -706,6 +1103,16 @@ ENDPROC(at91_sramc_self_refresh)
 	.word 0
 .saved_osc_status:
 	.word 0
+#ifdef CONFIG_SOC_SAMA7
+.saved_mck1:
+	.word 0
+.saved_mck2:
+	.word 0
+.saved_mck3:
+	.word 0
+.saved_mck4:
+	.word 0
+#endif
 
 ENTRY(at91_pm_suspend_in_sram_sz)
 	.word .-at91_pm_suspend_in_sram
diff --git a/arch/arm/mach-at91/sama7.c b/arch/arm/mach-at91/sama7.c
new file mode 100644
index 000000000000..bd43733ede18
--- /dev/null
+++ b/arch/arm/mach-at91/sama7.c
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Setup code for SAMA7
+ *
+ * Copyright (C) 2021 Microchip Technology, Inc. and its subsidiaries
+ *
+ */
+
+#include <linux/of.h>
+#include <linux/of_platform.h>
+
+#include <asm/mach/arch.h>
+#include <asm/system_misc.h>
+
+#include "generic.h"
+
+static void __init sama7_dt_device_init(void)
+{
+	of_platform_default_populate(NULL, NULL, NULL);
+	sama7_pm_init();
+}
+
+static const char *const sama7_dt_board_compat[] __initconst = {
+	"microchip,sama7",
+	NULL
+};
+
+DT_MACHINE_START(sama7_dt, "Microchip SAMA7")
+	/* Maintainer: Microchip */
+	.init_machine	= sama7_dt_device_init,
+	.dt_compat	= sama7_dt_board_compat,
+MACHINE_END
+
diff --git a/include/linux/clk/at91_pmc.h b/include/linux/clk/at91_pmc.h
index a4f82e836a7c..ccb3f034bfa9 100644
--- a/include/linux/clk/at91_pmc.h
+++ b/include/linux/clk/at91_pmc.h
@@ -137,6 +137,32 @@
 #define			AT91_PMC_PLLADIV2_ON		(1 << 12)
 #define		AT91_PMC_H32MXDIV	BIT(24)
 
+#define	AT91_PMC_MCR_V2		0x30				/* Master Clock Register [SAMA7G5 only] */
+#define		AT91_PMC_MCR_V2_ID_MSK	(0xF)
+#define			AT91_PMC_MCR_V2_ID(_id)		((_id) & AT91_PMC_MCR_V2_ID_MSK)
+#define		AT91_PMC_MCR_V2_CMD	(1 << 7)
+#define		AT91_PMC_MCR_V2_DIV	(7 << 8)
+#define			AT91_PMC_MCR_V2_DIV1		(0 << 8)
+#define			AT91_PMC_MCR_V2_DIV2		(1 << 8)
+#define			AT91_PMC_MCR_V2_DIV4		(2 << 8)
+#define			AT91_PMC_MCR_V2_DIV8		(3 << 8)
+#define			AT91_PMC_MCR_V2_DIV16		(4 << 8)
+#define			AT91_PMC_MCR_V2_DIV32		(5 << 8)
+#define			AT91_PMC_MCR_V2_DIV64		(6 << 8)
+#define			AT91_PMC_MCR_V2_DIV3		(7 << 8)
+#define		AT91_PMC_MCR_V2_CSS	(0x1F << 16)
+#define			AT91_PMC_MCR_V2_CSS_MD_SLCK	(0 << 16)
+#define			AT91_PMC_MCR_V2_CSS_TD_SLCK	(1 << 16)
+#define			AT91_PMC_MCR_V2_CSS_MAINCK	(2 << 16)
+#define			AT91_PMC_MCR_V2_CSS_MCK0	(3 << 16)
+#define			AT91_PMC_MCR_V2_CSS_SYSPLL	(5 << 16)
+#define			AT91_PMC_MCR_V2_CSS_DDRPLL	(6 << 16)
+#define			AT91_PMC_MCR_V2_CSS_IMGPLL	(7 << 16)
+#define			AT91_PMC_MCR_V2_CSS_BAUDPLL	(8 << 16)
+#define			AT91_PMC_MCR_V2_CSS_AUDIOPLL	(9 << 16)
+#define			AT91_PMC_MCR_V2_CSS_ETHPLL	(10 << 16)
+#define		AT91_PMC_MCR_V2_EN	(1 << 28)
+
 #define AT91_PMC_XTALF		0x34			/* Main XTAL Frequency Register [SAMA7G5 only] */
 
 #define	AT91_PMC_USB		0x38			/* USB Clock Register [some SAM9 only] */
diff --git a/include/soc/at91/sama7-ddr.h b/include/soc/at91/sama7-ddr.h
new file mode 100644
index 000000000000..f6542584ca13
--- /dev/null
+++ b/include/soc/at91/sama7-ddr.h
@@ -0,0 +1,80 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Microchip SAMA7 UDDR Controller and DDR3 PHY Controller registers offsets
+ * and bit definitions.
+ *
+ * Copyright (C) [2020] Microchip Technology Inc. and its subsidiaries
+ *
+ * Author: Claudu Beznea <claudiu.beznea@microchip.com>
+ */
+
+#ifndef __SAMA7_DDR_H__
+#define __SAMA7_DDR_H__
+
+#ifdef CONFIG_SOC_SAMA7
+
+/* DDR3PHY */
+#define DDR3PHY_PIR				(0x04)		/* DDR3PHY PHY Initialization Register	*/
+#define	DDR3PHY_PIR_DLLBYP		(1 << 17)	/* DLL Bypass */
+#define		DDR3PHY_PIR_ITMSRST		(1 << 4)	/* Interface Timing Module Soft Reset */
+#define	DDR3PHY_PIR_DLLLOCK		(1 << 2)	/* DLL Lock */
+#define		DDR3PHY_PIR_DLLSRST		(1 << 1)	/* DLL Soft Rest */
+#define	DDR3PHY_PIR_INIT		(1 << 0)	/* Initialization Trigger */
+
+#define DDR3PHY_PGCR				(0x08)		/* DDR3PHY PHY General Configuration Register */
+#define		DDR3PHY_PGCR_CKDV1		(1 << 13)	/* CK# Disable Value */
+#define		DDR3PHY_PGCR_CKDV0		(1 << 12)	/* CK Disable Value */
+
+#define	DDR3PHY_PGSR				(0x0C)		/* DDR3PHY PHY General Status Register */
+#define		DDR3PHY_PGSR_IDONE		(1 << 0)	/* Initialization Done */
+
+#define DDR3PHY_ACIOCR				(0x24)		/*  DDR3PHY AC I/O Configuration Register */
+#define		DDR3PHY_ACIOCR_CSPDD_CS0	(1 << 18)	/* CS#[0] Power Down Driver */
+#define		DDR3PHY_ACIOCR_CKPDD_CK0	(1 << 8)	/* CK[0] Power Down Driver */
+#define		DDR3PHY_ACIORC_ACPDD		(1 << 3)	/* AC Power Down Driver */
+
+#define DDR3PHY_DXCCR				(0x28)		/* DDR3PHY DATX8 Common Configuration Register */
+#define		DDR3PHY_DXCCR_DXPDR		(1 << 3)	/* Data Power Down Receiver */
+
+#define DDR3PHY_DSGCR				(0x2C)		/* DDR3PHY DDR System General Configuration Register */
+#define		DDR3PHY_DSGCR_ODTPDD_ODT0	(1 << 20)	/* ODT[0] Power Down Driver */
+
+#define DDR3PHY_ZQ0SR0				(0x188)		/* ZQ status register 0 */
+
+/* UDDRC */
+#define UDDRC_STAT				(0x04)		/* UDDRC Operating Mode Status Register */
+#define		UDDRC_STAT_SELFREF_TYPE_DIS	(0x0 << 4)	/* SDRAM is not in Self-refresh */
+#define		UDDRC_STAT_SELFREF_TYPE_PHY	(0x1 << 4)	/* SDRAM is in Self-refresh, which was caused by PHY Master Request */
+#define		UDDRC_STAT_SELFREF_TYPE_SW	(0x2 << 4)	/* SDRAM is in Self-refresh, which was not caused solely under Automatic Self-refresh control */
+#define		UDDRC_STAT_SELFREF_TYPE_AUTO	(0x3 << 4)	/* SDRAM is in Self-refresh, which was caused by Automatic Self-refresh only */
+#define		UDDRC_STAT_SELFREF_TYPE_MSK	(0x3 << 4)	/* Self-refresh type mask */
+#define		UDDRC_STAT_OPMODE_INIT		(0x0 << 0)	/* Init */
+#define		UDDRC_STAT_OPMODE_NORMAL	(0x1 << 0)	/* Normal */
+#define		UDDRC_STAT_OPMODE_PWRDOWN	(0x2 << 0)	/* Power-down */
+#define		UDDRC_STAT_OPMODE_SELF_REFRESH	(0x3 << 0)	/* Self-refresh */
+#define		UDDRC_STAT_OPMODE_MSK		(0x7 << 0)	/* Operating mode mask */
+
+#define UDDRC_PWRCTL				(0x30)		/* UDDRC Low Power Control Register */
+#define		UDDRC_PWRCTRL_SELFREF_SW	(1 << 5)	/* Software self-refresh */
+
+#define UDDRC_DFIMISC				(0x1B0)		/* UDDRC DFI Miscellaneous Control Register */
+#define		UDDRC_DFIMISC_DFI_INIT_COMPLETE_EN (1 << 0)	/* PHY initialization complete enable signal */
+
+#define UDDRC_SWCTRL				(0x320)		/* UDDRC Software Register Programming Control Enable */
+#define		UDDRC_SWCTRL_SW_DONE		(1 << 0)	/* Enable quasi-dynamic register programming outside reset */
+
+#define UDDRC_SWSTAT				(0x324)		/* UDDRC Software Register Programming Control Status */
+#define		UDDRC_SWSTAT_SW_DONE_ACK	(1 << 0)	/* Register programming done */
+
+#define UDDRC_PSTAT				(0x3FC)		/* UDDRC Port Status Register */
+#define	UDDRC_PSTAT_ALL_PORTS		(0x1F001F)	/* Read + writes outstanding transactions on all ports */
+
+#define UDDRC_PCTRL_0				(0x490)		/* UDDRC Port 0 Control Register */
+#define UDDRC_PCTRL_1				(0x540)		/* UDDRC Port 1 Control Register */
+#define UDDRC_PCTRL_2				(0x5F0)		/* UDDRC Port 2 Control Register */
+#define UDDRC_PCTRL_3				(0x6A0)		/* UDDRC Port 3 Control Register */
+#define UDDRC_PCTRL_4				(0x750)		/* UDDRC Port 4 Control Register */
+
+#endif /* CONFIG_SOC_SAMA7 */
+
+#endif /* __SAMA7_DDR_H__ */
diff --git a/include/soc/at91/sama7-sfrbu.h b/include/soc/at91/sama7-sfrbu.h
new file mode 100644
index 000000000000..76b740810d34
--- /dev/null
+++ b/include/soc/at91/sama7-sfrbu.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Microchip SAMA7 SFRBU registers offsets and bit definitions.
+ *
+ * Copyright (C) [2020] Microchip Technology Inc. and its subsidiaries
+ *
+ * Author: Claudu Beznea <claudiu.beznea@microchip.com>
+ */
+
+#ifndef __SAMA7_SFRBU_H__
+#define __SAMA7_SFRBU_H__
+
+#ifdef CONFIG_SOC_SAMA7
+
+#define AT91_SFRBU_PSWBU			(0x00)		/* SFRBU Power Switch BU Control Register */
+#define		AT91_SFRBU_PSWBU_PSWKEY		(0x4BD20C << 8)	/* Specific value mandatory to allow writing of other register bits */
+#define		AT91_SFRBU_PSWBU_STATE		(1 << 2)	/* Power switch BU state */
+#define		AT91_SFRBU_PSWBU_SOFTSWITCH	(1 << 1)	/* Power switch BU source selection */
+#define		AT91_SFRBU_PSWBU_CTRL		(1 << 0)	/* Power switch BU control */
+
+#define AT91_SFRBU_25LDOCR			(0x0C)		/* SFRBU 2.5V LDO Control Register */
+#define		AT91_SFRBU_25LDOCR_LDOANAKEY	(0x3B6E18 << 8)	/* Specific value mandatory to allow writing of other register bits. */
+#define		AT91_SFRBU_25LDOCR_STATE	(1 << 3)	/* LDOANA Switch On/Off Control */
+#define		AT91_SFRBU_25LDOCR_LP		(1 << 2)	/* LDOANA Low-Power Mode Control */
+#define		AT91_SFRBU_PD_VALUE_MSK		(0x3)
+#define		AT91_SFRBU_25LDOCR_PD_VALUE(v)	((v) & AT91_SFRBU_PD_VALUE_MSK)	/* LDOANA Pull-down value */
+
+#define AT91_FRBU_DDRPWR			(0x10)		/* SFRBU DDR Power Control Register */
+#define		AT91_FRBU_DDRPWR_STATE		(1 << 0)	/* DDR Power Mode State */
+
+#endif /* CONFIG_SOC_SAMA7 */
+
+#endif /* __SAMA7_SFRBU_H__ */
+