Merge tag 'reset-for-v5.15' of git://git.pengutronix.de/pza/linux into arm/drivers

Reset controller updates for v5.15

Add support for the SC7280 PDC Global and RZ/G2L USB/PHY reset
controllers, convert UniPhier glue device tree bindings to json-schema
and remove a leftover mention of ZTE zx2967 from Kconfig.

* tag 'reset-for-v5.15' of git://git.pengutronix.de/pza/linux:
  reset: simple: remove ZTE details in Kconfig help
  reset: renesas: Add RZ/G2L usbphy control driver
  dt-bindings: reset: Document RZ/G2L USBPHY Control bindings
  dt-bindings: reset: Convert UniPhier glue reset to json-schema
  reset: qcom: Add PDC Global reset signals for WPSS
  dt-bindings: reset: pdc: Add PDC Global bindings
  dt-bindings: reset: aoss: Add AOSS reset controller binding

Link: https://lore.kernel.org/r/d42a75fc17ce718ef1b3fa4c5d3f5c7fb0bd2bc2.camel@pengutronix.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

4 files changed, 234 insertions, 12 deletions

diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index 328f70f633eb..1af8a7e4c601 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -181,6 +181,13 @@ config RESET_RASPBERRYPI
 	  interfacing with RPi4's co-processor and model these firmware
 	  initialization routines as reset lines.
 
+config RESET_RZG2L_USBPHY_CTRL
+	tristate "Renesas RZ/G2L USBPHY control driver"
+	depends on ARCH_R9A07G044 || COMPILE_TEST
+	help
+	  Support for USBPHY Control found on RZ/G2L family. It mainly
+	  controls reset and power down of the USB/PHY.
+
 config RESET_SCMI
 	tristate "Reset driver controlled via ARM SCMI interface"
 	depends on ARM_SCMI_PROTOCOL || COMPILE_TEST
@@ -207,7 +214,6 @@ config RESET_SIMPLE
 	   - Realtek SoCs
 	   - RCC reset controller in STM32 MCUs
 	   - Allwinner SoCs
-	   - ZTE's zx2967 family
 	   - SiFive FU740 SoCs
 
 config RESET_SOCFPGA
diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
index ea8b8d9ca565..21d46d8869ff 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_RESET_PISTACHIO) += reset-pistachio.o
 obj-$(CONFIG_RESET_QCOM_AOSS) += reset-qcom-aoss.o
 obj-$(CONFIG_RESET_QCOM_PDC) += reset-qcom-pdc.o
 obj-$(CONFIG_RESET_RASPBERRYPI) += reset-raspberrypi.o
+obj-$(CONFIG_RESET_RZG2L_USBPHY_CTRL) += reset-rzg2l-usbphy-ctrl.o
 obj-$(CONFIG_RESET_SCMI) += reset-scmi.o
 obj-$(CONFIG_RESET_SIMPLE) += reset-simple.o
 obj-$(CONFIG_RESET_SOCFPGA) += reset-socfpga.o
diff --git a/drivers/reset/reset-qcom-pdc.c b/drivers/reset/reset-qcom-pdc.c
index ab74bccd4a5b..f22bb49a4ac8 100644
--- a/drivers/reset/reset-qcom-pdc.c
+++ b/drivers/reset/reset-qcom-pdc.c
@@ -11,18 +11,26 @@
 
 #include <dt-bindings/reset/qcom,sdm845-pdc.h>
 
-#define RPMH_PDC_SYNC_RESET	0x100
+#define RPMH_SDM845_PDC_SYNC_RESET	0x100
+#define RPMH_SC7280_PDC_SYNC_RESET	0x1000
 
 struct qcom_pdc_reset_map {
 	u8 bit;
 };
 
+struct qcom_pdc_reset_desc {
+	const struct qcom_pdc_reset_map *resets;
+	size_t num_resets;
+	unsigned int offset;
+};
+
 struct qcom_pdc_reset_data {
 	struct reset_controller_dev rcdev;
 	struct regmap *regmap;
+	const struct qcom_pdc_reset_desc *desc;
 };
 
-static const struct regmap_config sdm845_pdc_regmap_config = {
+static const struct regmap_config pdc_regmap_config = {
 	.name		= "pdc-reset",
 	.reg_bits	= 32,
 	.reg_stride	= 4,
@@ -44,6 +52,33 @@ static const struct qcom_pdc_reset_map sdm845_pdc_resets[] = {
 	[PDC_MODEM_SYNC_RESET] = {9},
 };
 
+static const struct qcom_pdc_reset_desc sdm845_pdc_reset_desc = {
+	.resets = sdm845_pdc_resets,
+	.num_resets = ARRAY_SIZE(sdm845_pdc_resets),
+	.offset = RPMH_SDM845_PDC_SYNC_RESET,
+};
+
+static const struct qcom_pdc_reset_map sc7280_pdc_resets[] = {
+	[PDC_APPS_SYNC_RESET] = {0},
+	[PDC_SP_SYNC_RESET] = {1},
+	[PDC_AUDIO_SYNC_RESET] = {2},
+	[PDC_SENSORS_SYNC_RESET] = {3},
+	[PDC_AOP_SYNC_RESET] = {4},
+	[PDC_DEBUG_SYNC_RESET] = {5},
+	[PDC_GPU_SYNC_RESET] = {6},
+	[PDC_DISPLAY_SYNC_RESET] = {7},
+	[PDC_COMPUTE_SYNC_RESET] = {8},
+	[PDC_MODEM_SYNC_RESET] = {9},
+	[PDC_WLAN_RF_SYNC_RESET] = {10},
+	[PDC_WPSS_SYNC_RESET] = {11},
+};
+
+static const struct qcom_pdc_reset_desc sc7280_pdc_reset_desc = {
+	.resets = sc7280_pdc_resets,
+	.num_resets = ARRAY_SIZE(sc7280_pdc_resets),
+	.offset = RPMH_SC7280_PDC_SYNC_RESET,
+};
+
 static inline struct qcom_pdc_reset_data *to_qcom_pdc_reset_data(
 				struct reset_controller_dev *rcdev)
 {
@@ -54,19 +89,18 @@ static int qcom_pdc_control_assert(struct reset_controller_dev *rcdev,
 					unsigned long idx)
 {
 	struct qcom_pdc_reset_data *data = to_qcom_pdc_reset_data(rcdev);
+	u32 mask = BIT(data->desc->resets[idx].bit);
 
-	return regmap_update_bits(data->regmap, RPMH_PDC_SYNC_RESET,
-				  BIT(sdm845_pdc_resets[idx].bit),
-				  BIT(sdm845_pdc_resets[idx].bit));
+	return regmap_update_bits(data->regmap, data->desc->offset, mask, mask);
 }
 
 static int qcom_pdc_control_deassert(struct reset_controller_dev *rcdev,
 					unsigned long idx)
 {
 	struct qcom_pdc_reset_data *data = to_qcom_pdc_reset_data(rcdev);
+	u32 mask = BIT(data->desc->resets[idx].bit);
 
-	return regmap_update_bits(data->regmap, RPMH_PDC_SYNC_RESET,
-				  BIT(sdm845_pdc_resets[idx].bit), 0);
+	return regmap_update_bits(data->regmap, data->desc->offset, mask, 0);
 }
 
 static const struct reset_control_ops qcom_pdc_reset_ops = {
@@ -76,22 +110,27 @@ static const struct reset_control_ops qcom_pdc_reset_ops = {
 
 static int qcom_pdc_reset_probe(struct platform_device *pdev)
 {
+	const struct qcom_pdc_reset_desc *desc;
 	struct qcom_pdc_reset_data *data;
 	struct device *dev = &pdev->dev;
 	void __iomem *base;
 	struct resource *res;
 
+	desc = device_get_match_data(&pdev->dev);
+	if (!desc)
+		return -EINVAL;
+
 	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;
 
+	data->desc = desc;
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
-	data->regmap = devm_regmap_init_mmio(dev, base,
-					     &sdm845_pdc_regmap_config);
+	data->regmap = devm_regmap_init_mmio(dev, base, &pdc_regmap_config);
 	if (IS_ERR(data->regmap)) {
 		dev_err(dev, "Unable to initialize regmap\n");
 		return PTR_ERR(data->regmap);
@@ -99,14 +138,15 @@ static int qcom_pdc_reset_probe(struct platform_device *pdev)
 
 	data->rcdev.owner = THIS_MODULE;
 	data->rcdev.ops = &qcom_pdc_reset_ops;
-	data->rcdev.nr_resets = ARRAY_SIZE(sdm845_pdc_resets);
+	data->rcdev.nr_resets = desc->num_resets;
 	data->rcdev.of_node = dev->of_node;
 
 	return devm_reset_controller_register(dev, &data->rcdev);
 }
 
 static const struct of_device_id qcom_pdc_reset_of_match[] = {
-	{ .compatible = "qcom,sdm845-pdc-global" },
+	{ .compatible = "qcom,sc7280-pdc-global", .data = &sc7280_pdc_reset_desc },
+	{ .compatible = "qcom,sdm845-pdc-global", .data = &sdm845_pdc_reset_desc },
 	{}
 };
 MODULE_DEVICE_TABLE(of, qcom_pdc_reset_of_match);
diff --git a/drivers/reset/reset-rzg2l-usbphy-ctrl.c b/drivers/reset/reset-rzg2l-usbphy-ctrl.c
new file mode 100644
index 000000000000..e0704fd2b533
--- /dev/null
+++ b/drivers/reset/reset-rzg2l-usbphy-ctrl.c
@@ -0,0 +1,175 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas RZ/G2L USBPHY control driver
+ *
+ * Copyright (C) 2021 Renesas Electronics Corporation
+ */
+
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/reset-controller.h>
+
+#define RESET			0x000
+
+#define RESET_SEL_PLLRESET	BIT(12)
+#define RESET_PLLRESET		BIT(8)
+
+#define RESET_SEL_P2RESET	BIT(5)
+#define RESET_SEL_P1RESET	BIT(4)
+#define RESET_PHYRST_2		BIT(1)
+#define RESET_PHYRST_1		BIT(0)
+
+#define PHY_RESET_PORT2		(RESET_SEL_P2RESET | RESET_PHYRST_2)
+#define PHY_RESET_PORT1		(RESET_SEL_P1RESET | RESET_PHYRST_1)
+
+#define NUM_PORTS		2
+
+struct rzg2l_usbphy_ctrl_priv {
+	struct reset_controller_dev rcdev;
+	struct reset_control *rstc;
+	void __iomem *base;
+
+	spinlock_t lock;
+};
+
+#define rcdev_to_priv(x)	container_of(x, struct rzg2l_usbphy_ctrl_priv, rcdev)
+
+static int rzg2l_usbphy_ctrl_assert(struct reset_controller_dev *rcdev,
+				    unsigned long id)
+{
+	struct rzg2l_usbphy_ctrl_priv *priv = rcdev_to_priv(rcdev);
+	u32 port_mask = PHY_RESET_PORT1 | PHY_RESET_PORT2;
+	void __iomem *base = priv->base;
+	unsigned long flags;
+	u32 val;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	val = readl(base + RESET);
+	val |= id ? PHY_RESET_PORT2 : PHY_RESET_PORT1;
+	if (port_mask == (val & port_mask))
+		val |= RESET_PLLRESET;
+	writel(val, base + RESET);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+static int rzg2l_usbphy_ctrl_deassert(struct reset_controller_dev *rcdev,
+				      unsigned long id)
+{
+	struct rzg2l_usbphy_ctrl_priv *priv = rcdev_to_priv(rcdev);
+	void __iomem *base = priv->base;
+	unsigned long flags;
+	u32 val;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	val = readl(base + RESET);
+
+	val |= RESET_SEL_PLLRESET;
+	val &= ~(RESET_PLLRESET | (id ? PHY_RESET_PORT2 : PHY_RESET_PORT1));
+	writel(val, base + RESET);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+static int rzg2l_usbphy_ctrl_status(struct reset_controller_dev *rcdev,
+				    unsigned long id)
+{
+	struct rzg2l_usbphy_ctrl_priv *priv = rcdev_to_priv(rcdev);
+	u32 port_mask;
+
+	port_mask = id ? PHY_RESET_PORT2 : PHY_RESET_PORT1;
+
+	return !!(readl(priv->base + RESET) & port_mask);
+}
+
+static const struct of_device_id rzg2l_usbphy_ctrl_match_table[] = {
+	{ .compatible = "renesas,rzg2l-usbphy-ctrl" },
+	{ /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, rzg2l_usbphy_ctrl_match_table);
+
+static const struct reset_control_ops rzg2l_usbphy_ctrl_reset_ops = {
+	.assert = rzg2l_usbphy_ctrl_assert,
+	.deassert = rzg2l_usbphy_ctrl_deassert,
+	.status = rzg2l_usbphy_ctrl_status,
+};
+
+static int rzg2l_usbphy_ctrl_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct rzg2l_usbphy_ctrl_priv *priv;
+	unsigned long flags;
+	int error;
+	u32 val;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(priv->base))
+		return PTR_ERR(priv->base);
+
+	priv->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
+	if (IS_ERR(priv->rstc))
+		return dev_err_probe(dev, PTR_ERR(priv->rstc),
+				     "failed to get reset\n");
+
+	reset_control_deassert(priv->rstc);
+
+	priv->rcdev.ops = &rzg2l_usbphy_ctrl_reset_ops;
+	priv->rcdev.of_reset_n_cells = 1;
+	priv->rcdev.nr_resets = NUM_PORTS;
+	priv->rcdev.of_node = dev->of_node;
+	priv->rcdev.dev = dev;
+
+	error = devm_reset_controller_register(dev, &priv->rcdev);
+	if (error)
+		return error;
+
+	spin_lock_init(&priv->lock);
+	dev_set_drvdata(dev, priv);
+
+	pm_runtime_enable(&pdev->dev);
+	pm_runtime_resume_and_get(&pdev->dev);
+
+	/* put pll and phy into reset state */
+	spin_lock_irqsave(&priv->lock, flags);
+	val = readl(priv->base + RESET);
+	val |= RESET_SEL_PLLRESET | RESET_PLLRESET | PHY_RESET_PORT2 | PHY_RESET_PORT1;
+	writel(val, priv->base + RESET);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+static int rzg2l_usbphy_ctrl_remove(struct platform_device *pdev)
+{
+	struct rzg2l_usbphy_ctrl_priv *priv = dev_get_drvdata(&pdev->dev);
+
+	pm_runtime_put(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+	reset_control_assert(priv->rstc);
+
+	return 0;
+}
+
+static struct platform_driver rzg2l_usbphy_ctrl_driver = {
+	.driver = {
+		.name		= "rzg2l_usbphy_ctrl",
+		.of_match_table	= rzg2l_usbphy_ctrl_match_table,
+	},
+	.probe	= rzg2l_usbphy_ctrl_probe,
+	.remove	= rzg2l_usbphy_ctrl_remove,
+};
+module_platform_driver(rzg2l_usbphy_ctrl_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Renesas RZ/G2L USBPHY Control");
+MODULE_AUTHOR("biju.das.jz@bp.renesas.com>");