microblaze: Convert generic platform to DM gpio

Converting GPIO to DM requires to do changes in reset subsystem
that's why support for Microblaze soft reset via sysreset and GPIO
sysreset support was added.
These two patches enables enabling GPIO DM.
Microblaze soft reset is bind at last reset method.

GPIO reset is handled via sysreset with adding this fragment to DT.

gpio-restart {
	compatible = "gpio-restart";
	gpios = <&reset_gpio 0 0 0>;
	/* 3rd cell ACTIVE_HIGH = 0, ACTIVE_LOW = 1 */
};

hard-reset-gpio property is not documented and also handled.
Conversion is required.

Unfortunately do_reset is required for SPL that's why use only soft
microblaze reset for now.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

2 files changed, 11 insertions, 38 deletions

diff --git a/board/xilinx/microblaze-generic/microblaze-generic.c b/board/xilinx/microblaze-generic/microblaze-generic.c
index 556d0de7f14..44fb48b347a 100644
--- a/board/xilinx/microblaze-generic/microblaze-generic.c
+++ b/board/xilinx/microblaze-generic/microblaze-generic.c
@@ -1,8 +1,8 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
- * (C) Copyright 2007 Michal Simek
+ * (C) Copyright 2007-2018 Michal Simek
  *
- * Michal  SIMEK <monstr@monstr.eu>
+ * Michal SIMEK <monstr@monstr.eu>
  */
 
 /*
@@ -12,6 +12,8 @@
 
 #include <common.h>
 #include <config.h>
+#include <dm.h>
+#include <dm/lists.h>
 #include <fdtdec.h>
 #include <asm/processor.h>
 #include <asm/microblaze_intc.h>
@@ -22,10 +24,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-#ifdef CONFIG_XILINX_GPIO
-static int reset_pin = -1;
-#endif
-
 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_WDT)
 static struct udevice *watchdog_dev;
 #endif /* !CONFIG_SPL_BUILD && CONFIG_WDT */
@@ -66,33 +64,6 @@ int dram_init(void)
 	return 0;
 };
 
-#if !defined(CONFIG_SYSRESET) || defined(CONFIG_SPL_BUILD)
-int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
-{
-#ifndef CONFIG_SPL_BUILD
-#ifdef CONFIG_XILINX_GPIO
-	if (reset_pin != -1)
-		gpio_direction_output(reset_pin, 1);
-#endif
-#endif
-	puts("Resetting board\n");
-	__asm__ __volatile__ ("	mts rmsr, r0;" \
-				"bra r0");
-
-	return 0;
-}
-#endif
-
-static int gpio_init(void)
-{
-#ifdef CONFIG_XILINX_GPIO
-	reset_pin = gpio_alloc(CONFIG_SYS_GPIO_0_ADDR, "reset", 1);
-	if (reset_pin != -1)
-		gpio_request(reset_pin, "reset_pin");
-#endif
-	return 0;
-}
-
 #ifdef CONFIG_WDT
 /* Called by macro WATCHDOG_RESET */
 void watchdog_reset(void)
@@ -117,8 +88,6 @@ void watchdog_reset(void)
 
 int board_late_init(void)
 {
-	gpio_init();
-
 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_WDT)
 	watchdog_dev = NULL;
 
@@ -133,6 +102,13 @@ int board_late_init(void)
 	wdt_start(watchdog_dev, 0, 0);
 	puts("Watchdog: Started\n");
 #endif /* !CONFIG_SPL_BUILD && CONFIG_WDT */
+#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_SYSRESET_MICROBLAZE)
+	int ret;
 
+	ret = device_bind_driver(gd->dm_root, "mb_soft_reset",
+				 "reset_soft", NULL);
+	if (ret)
+		printf("Warning: No reset driver: ret=%d\n", ret);
+#endif
 	return 0;
 }
diff --git a/board/xilinx/microblaze-generic/xparameters.h b/board/xilinx/microblaze-generic/xparameters.h
index 01116d827c6..5e0911faf63 100644
--- a/board/xilinx/microblaze-generic/xparameters.h
+++ b/board/xilinx/microblaze-generic/xparameters.h
@@ -13,9 +13,6 @@
 /* Microblaze is microblaze_0 */
 #define XILINX_FSL_NUMBER	3
 
-/* GPIO is LEDs_4Bit*/
-#define XILINX_GPIO_BASEADDR	0x40000000
-
 /* Flash Memory is FLASH_2Mx32 */
 #define XILINX_FLASH_START	0x2c000000
 #define XILINX_FLASH_SIZE	0x00800000