Merge tag 'staging-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging driver updates from Greg KH:
 "Here is the big set of staging driver updates for 5.18-rc1.

  Loads of tiny cleanups for almost all staging drivers in here, nothing
  major at all. Highlights include:

   - remove the ashmem Android driver. It is long-dead and if there are
     any legacy userspace applications still using it, the Android
     kernel images will maintain it, the community shouldn't care about
     it anymore

   - wfx wifi driver major cleanups. Should be ready to merge out of
     staging soon, and will coordinate with the wifi maintainers after
     -rc1 is out

   - major cleanups and unwinding of the layers of the r8188eu driver.
     It's amazing just how many unneeded layers of abstraction is in
     there, just when we think it's done, another is found...

   - lots of tiny coding style cleanups in many other staging drivers.

  All have been in linux-next for a while with no reported problems"

* tag 'staging-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (455 commits)
  staging: r8188eu: remove unnecessary memset in r8188eu
  staging: greybus: introduce pwm_ops::apply
  staging: rts5208: Resolve checkpatch.pl issues.
  staging: sm750fb: fix naming style
  staging: fbtft: Consider type of init sequence values in fbtft_init_display()
  staging: fbtft: Constify buf parameter in fbtft_dbg_hex()
  staging: mmal-vchiq: clear redundant item named bulk_scratch
  mips: dts: ralink: add MT7621 SoC
  staging: r8188eu: remove some unused local ieee80211 macros
  staging: r8188eu: make rtl8188e_process_phy_info static
  staging: r8188eu: remove unused function prototype
  staging: r8188eu: remove three unused receive defines
  staging: r8188eu: remove unnecessary initializations
  staging: rtl8192e: Fix spelling mistake "RESQUEST" -> "REQUEST"
  MAINTAINERS: remove the obsolete file entry for staging in ANDROID DRIVERS
  staging: r8188eu: proper error handling in rtw_init_drv_sw
  staging: r8188eu: call _cancel_timer_ex from _rtw_free_recv_priv
  staging: vt6656: Removed unused variable vt3342_vnt_threshold
  staging: vt6656: Removed unused variable bb_vga_0
  staging: remove ashmem
  ...

1 files changed, 91 insertions, 1 deletions

diff --git a/drivers/clk/ralink/clk-mt7621.c b/drivers/clk/ralink/clk-mt7621.c
index a2c045390f00..99256659dd96 100644
--- a/drivers/clk/ralink/clk-mt7621.c
+++ b/drivers/clk/ralink/clk-mt7621.c
@@ -11,14 +11,17 @@
 #include <linux/mfd/syscon.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
+#include <linux/reset-controller.h>
 #include <linux/slab.h>
 #include <dt-bindings/clock/mt7621-clk.h>
+#include <dt-bindings/reset/mt7621-reset.h>
 
 /* Configuration registers */
 #define SYSC_REG_SYSTEM_CONFIG0         0x10
 #define SYSC_REG_SYSTEM_CONFIG1         0x14
 #define SYSC_REG_CLKCFG0		0x2c
 #define SYSC_REG_CLKCFG1		0x30
+#define SYSC_REG_RESET_CTRL		0x34
 #define SYSC_REG_CUR_CLK_STS		0x44
 #define MEMC_REG_CPU_PLL		0x648
 
@@ -398,6 +401,82 @@ free_clk_priv:
 }
 CLK_OF_DECLARE_DRIVER(mt7621_clk, "mediatek,mt7621-sysc", mt7621_clk_init);
 
+struct mt7621_rst {
+	struct reset_controller_dev rcdev;
+	struct regmap *sysc;
+};
+
+static struct mt7621_rst *to_mt7621_rst(struct reset_controller_dev *dev)
+{
+	return container_of(dev, struct mt7621_rst, rcdev);
+}
+
+static int mt7621_assert_device(struct reset_controller_dev *rcdev,
+				unsigned long id)
+{
+	struct mt7621_rst *data = to_mt7621_rst(rcdev);
+	struct regmap *sysc = data->sysc;
+
+	return regmap_update_bits(sysc, SYSC_REG_RESET_CTRL, BIT(id), BIT(id));
+}
+
+static int mt7621_deassert_device(struct reset_controller_dev *rcdev,
+				  unsigned long id)
+{
+	struct mt7621_rst *data = to_mt7621_rst(rcdev);
+	struct regmap *sysc = data->sysc;
+
+	return regmap_update_bits(sysc, SYSC_REG_RESET_CTRL, BIT(id), 0);
+}
+
+static int mt7621_reset_device(struct reset_controller_dev *rcdev,
+			       unsigned long id)
+{
+	int ret;
+
+	ret = mt7621_assert_device(rcdev, id);
+	if (ret < 0)
+		return ret;
+
+	return mt7621_deassert_device(rcdev, id);
+}
+
+static int mt7621_rst_xlate(struct reset_controller_dev *rcdev,
+			    const struct of_phandle_args *reset_spec)
+{
+	unsigned long id = reset_spec->args[0];
+
+	if (id == MT7621_RST_SYS || id >= rcdev->nr_resets)
+		return -EINVAL;
+
+	return id;
+}
+
+static const struct reset_control_ops reset_ops = {
+	.reset = mt7621_reset_device,
+	.assert = mt7621_assert_device,
+	.deassert = mt7621_deassert_device
+};
+
+static int mt7621_reset_init(struct device *dev, struct regmap *sysc)
+{
+	struct mt7621_rst *rst_data;
+
+	rst_data = devm_kzalloc(dev, sizeof(*rst_data), GFP_KERNEL);
+	if (!rst_data)
+		return -ENOMEM;
+
+	rst_data->sysc = sysc;
+	rst_data->rcdev.ops = &reset_ops;
+	rst_data->rcdev.owner = THIS_MODULE;
+	rst_data->rcdev.nr_resets = 32;
+	rst_data->rcdev.of_reset_n_cells = 1;
+	rst_data->rcdev.of_xlate = mt7621_rst_xlate;
+	rst_data->rcdev.of_node = dev_of_node(dev);
+
+	return devm_reset_controller_register(dev, &rst_data->rcdev);
+}
+
 static int mt7621_clk_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
@@ -424,6 +503,12 @@ static int mt7621_clk_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	ret = mt7621_reset_init(dev, priv->sysc);
+	if (ret) {
+		dev_err(dev, "Could not init reset controller\n");
+		return ret;
+	}
+
 	count = ARRAY_SIZE(mt7621_clks_base) +
 		ARRAY_SIZE(mt7621_fixed_clks) + ARRAY_SIZE(mt7621_gates);
 	clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, count),
@@ -485,4 +570,9 @@ static struct platform_driver mt7621_clk_driver = {
 		.of_match_table = mt7621_clk_of_match,
 	},
 };
-builtin_platform_driver(mt7621_clk_driver);
+
+static int __init mt7621_clk_reset_init(void)
+{
+	return platform_driver_register(&mt7621_clk_driver);
+}
+arch_initcall(mt7621_clk_reset_init);