Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver updates from Arnd Bergmann:
 "This branch contains platform-related driver updates for ARM and
  ARM64, these are the areas that bring the changes:

  New drivers:

   - driver support for Renesas R-Car V3M (R8A77970)

   - power management support for Amlogic GX

   - a new driver for the Tegra BPMP thermal sensor

   - a new bus driver for Technologic Systems NBUS

  Changes for subsystems that prefer to merge through arm-soc:

   - the usual updates for reset controller drivers from Philipp Zabel,
     with five added drivers for SoCs in the arc, meson, socfpa,
     uniphier and mediatek families

   - updates to the ARM SCPI and PSCI frameworks, from Sudeep Holla,
     Heiner Kallweit and Lorenzo Pieralisi

  Changes specific to some ARM-based SoC

   - the Freescale/NXP DPAA QBMan drivers from PowerPC can now work on
     ARM as well

   - several changes for power management on Broadcom SoCs

   - various improvements on Qualcomm, Broadcom, Amlogic, Atmel,
     Mediatek

   - minor Cleanups for Samsung, TI OMAP SoCs"

[ NOTE! This doesn't work without the previous ARM SoC device-tree pull,
  because the R8A77970 driver is missing a header file that came from
  that pull.

  The fact that this got merged afterwards only fixes it at this point,
  and bisection of that driver will fail if/when you walk into the
  history of that driver.           - Linus ]

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (96 commits)
  soc: amlogic: meson-gx-pwrc-vpu: fix power-off when powered by bootloader
  bus: add driver for the Technologic Systems NBUS
  memory: omap-gpmc: Remove deprecated gpmc_update_nand_reg()
  soc: qcom: remove unused label
  soc: amlogic: gx pm domain: add PM and OF dependencies
  drivers/firmware: psci_checker: Add missing destroy_timer_on_stack()
  dt-bindings: power: add amlogic meson power domain bindings
  soc: amlogic: add Meson GX VPU Domains driver
  soc: qcom: Remote filesystem memory driver
  dt-binding: soc: qcom: Add binding for rmtfs memory
  of: reserved_mem: Accessor for acquiring reserved_mem
  of/platform: Generalize /reserved-memory handling
  soc: mediatek: pwrap: fix fatal compiler error
  soc: mediatek: pwrap: fix compiler errors
  arm64: mediatek: cleanup message for platform selection
  soc: Allow test-building of MediaTek drivers
  soc: mediatek: place Kconfig for all SoC drivers under menu
  soc: mediatek: pwrap: add support for MT7622 SoC
  soc: mediatek: pwrap: add common way for setup CS timing extenstion
  soc: mediatek: pwrap: add MediaTek MT6380 as one slave of pwrap
  ..

1 files changed, 58 insertions, 7 deletions

diff --git a/drivers/reset/reset-meson.c b/drivers/reset/reset-meson.c
index a8b915eb8b58..c419a3753d00 100644
--- a/drivers/reset/reset-meson.c
+++ b/drivers/reset/reset-meson.c
@@ -62,13 +62,16 @@
 #include <linux/reset-controller.h>
 #include <linux/slab.h>
 #include <linux/types.h>
+#include <linux/of_device.h>
 
 #define REG_COUNT	8
 #define BITS_PER_REG	32
+#define LEVEL_OFFSET	0x7c
 
 struct meson_reset {
 	void __iomem *reg_base;
 	struct reset_controller_dev rcdev;
+	spinlock_t lock;
 };
 
 static int meson_reset_reset(struct reset_controller_dev *rcdev,
@@ -80,26 +83,68 @@ static int meson_reset_reset(struct reset_controller_dev *rcdev,
 	unsigned int offset = id % BITS_PER_REG;
 	void __iomem *reg_addr = data->reg_base + (bank << 2);
 
-	if (bank >= REG_COUNT)
-		return -EINVAL;
-
 	writel(BIT(offset), reg_addr);
 
 	return 0;
 }
 
-static const struct reset_control_ops meson_reset_ops = {
+static int meson_reset_level(struct reset_controller_dev *rcdev,
+			    unsigned long id, bool assert)
+{
+	struct meson_reset *data =
+		container_of(rcdev, struct meson_reset, rcdev);
+	unsigned int bank = id / BITS_PER_REG;
+	unsigned int offset = id % BITS_PER_REG;
+	void __iomem *reg_addr = data->reg_base + LEVEL_OFFSET + (bank << 2);
+	unsigned long flags;
+	u32 reg;
+
+	spin_lock_irqsave(&data->lock, flags);
+
+	reg = readl(reg_addr);
+	if (assert)
+		writel(reg & ~BIT(offset), reg_addr);
+	else
+		writel(reg | BIT(offset), reg_addr);
+
+	spin_unlock_irqrestore(&data->lock, flags);
+
+	return 0;
+}
+
+static int meson_reset_assert(struct reset_controller_dev *rcdev,
+			      unsigned long id)
+{
+	return meson_reset_level(rcdev, id, true);
+}
+
+static int meson_reset_deassert(struct reset_controller_dev *rcdev,
+				unsigned long id)
+{
+	return meson_reset_level(rcdev, id, false);
+}
+
+static const struct reset_control_ops meson_reset_meson8_ops = {
 	.reset		= meson_reset_reset,
 };
 
+static const struct reset_control_ops meson_reset_gx_ops = {
+	.reset		= meson_reset_reset,
+	.assert		= meson_reset_assert,
+	.deassert	= meson_reset_deassert,
+};
+
 static const struct of_device_id meson_reset_dt_ids[] = {
-	 { .compatible = "amlogic,meson8b-reset", },
-	 { .compatible = "amlogic,meson-gxbb-reset", },
+	 { .compatible = "amlogic,meson8b-reset",
+	   .data = &meson_reset_meson8_ops, },
+	 { .compatible = "amlogic,meson-gxbb-reset",
+	   .data = &meson_reset_gx_ops, },
 	 { /* sentinel */ },
 };
 
 static int meson_reset_probe(struct platform_device *pdev)
 {
+	const struct reset_control_ops *ops;
 	struct meson_reset *data;
 	struct resource *res;
 
@@ -107,6 +152,10 @@ static int meson_reset_probe(struct platform_device *pdev)
 	if (!data)
 		return -ENOMEM;
 
+	ops = of_device_get_match_data(&pdev->dev);
+	if (!ops)
+		return -EINVAL;
+
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	data->reg_base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(data->reg_base))
@@ -114,9 +163,11 @@ static int meson_reset_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, data);
 
+	spin_lock_init(&data->lock);
+
 	data->rcdev.owner = THIS_MODULE;
 	data->rcdev.nr_resets = REG_COUNT * BITS_PER_REG;
-	data->rcdev.ops = &meson_reset_ops;
+	data->rcdev.ops = ops;
 	data->rcdev.of_node = pdev->dev.of_node;
 
 	return devm_reset_controller_register(&pdev->dev, &data->rcdev);