Linux-libre 4.5-gnu

13 files changed, 220 insertions, 36 deletions

diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index 0615f50a1..df37212a5 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -13,3 +13,4 @@ menuconfig RESET_CONTROLLER
 	  If unsure, say no.
 
 source "drivers/reset/sti/Kconfig"
+source "drivers/reset/hisilicon/Kconfig"
diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
index 85d5904e5..4d7178e46 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -1,8 +1,9 @@
-obj-$(CONFIG_RESET_CONTROLLER) += core.o
+obj-y += core.o
 obj-$(CONFIG_ARCH_LPC18XX) += reset-lpc18xx.o
 obj-$(CONFIG_ARCH_SOCFPGA) += reset-socfpga.o
 obj-$(CONFIG_ARCH_BERLIN) += reset-berlin.o
 obj-$(CONFIG_ARCH_SUNXI) += reset-sunxi.o
 obj-$(CONFIG_ARCH_STI) += sti/
+obj-$(CONFIG_ARCH_HISI) += hisilicon/
 obj-$(CONFIG_ARCH_ZYNQ) += reset-zynq.o
 obj-$(CONFIG_ATH79) += reset-ath79.o
diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index 7955e00d0..873766389 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -30,7 +30,6 @@ static LIST_HEAD(reset_controller_list);
  */
 struct reset_control {
 	struct reset_controller_dev *rcdev;
-	struct device *dev;
 	unsigned int id;
 };
 
@@ -95,7 +94,7 @@ int reset_control_reset(struct reset_control *rstc)
 	if (rstc->rcdev->ops->reset)
 		return rstc->rcdev->ops->reset(rstc->rcdev, rstc->id);
 
-	return -ENOSYS;
+	return -ENOTSUPP;
 }
 EXPORT_SYMBOL_GPL(reset_control_reset);
 
@@ -108,7 +107,7 @@ int reset_control_assert(struct reset_control *rstc)
 	if (rstc->rcdev->ops->assert)
 		return rstc->rcdev->ops->assert(rstc->rcdev, rstc->id);
 
-	return -ENOSYS;
+	return -ENOTSUPP;
 }
 EXPORT_SYMBOL_GPL(reset_control_assert);
 
@@ -121,7 +120,7 @@ int reset_control_deassert(struct reset_control *rstc)
 	if (rstc->rcdev->ops->deassert)
 		return rstc->rcdev->ops->deassert(rstc->rcdev, rstc->id);
 
-	return -ENOSYS;
+	return -ENOTSUPP;
 }
 EXPORT_SYMBOL_GPL(reset_control_deassert);
 
@@ -136,32 +135,29 @@ int reset_control_status(struct reset_control *rstc)
 	if (rstc->rcdev->ops->status)
 		return rstc->rcdev->ops->status(rstc->rcdev, rstc->id);
 
-	return -ENOSYS;
+	return -ENOTSUPP;
 }
 EXPORT_SYMBOL_GPL(reset_control_status);
 
 /**
- * of_reset_control_get - Lookup and obtain a reference to a reset controller.
+ * of_reset_control_get_by_index - Lookup and obtain a reference to a reset
+ * controller by index.
  * @node: device to be reset by the controller
- * @id: reset line name
+ * @index: index of the reset controller
  *
- * Returns a struct reset_control or IS_ERR() condition containing errno.
- *
- * Use of id names is optional.
+ * This is to be used to perform a list of resets for a device or power domain
+ * in whatever order. Returns a struct reset_control or IS_ERR() condition
+ * containing errno.
  */
-struct reset_control *of_reset_control_get(struct device_node *node,
-					   const char *id)
+struct reset_control *of_reset_control_get_by_index(struct device_node *node,
+					   int index)
 {
 	struct reset_control *rstc = ERR_PTR(-EPROBE_DEFER);
 	struct reset_controller_dev *r, *rcdev;
 	struct of_phandle_args args;
-	int index = 0;
 	int rstc_id;
 	int ret;
 
-	if (id)
-		index = of_property_match_string(node,
-						 "reset-names", id);
 	ret = of_parse_phandle_with_args(node, "resets", "#reset-cells",
 					 index, &args);
 	if (ret)
@@ -202,6 +198,30 @@ struct reset_control *of_reset_control_get(struct device_node *node,
 
 	return rstc;
 }
+EXPORT_SYMBOL_GPL(of_reset_control_get_by_index);
+
+/**
+ * of_reset_control_get - Lookup and obtain a reference to a reset controller.
+ * @node: device to be reset by the controller
+ * @id: reset line name
+ *
+ * Returns a struct reset_control or IS_ERR() condition containing errno.
+ *
+ * Use of id names is optional.
+ */
+struct reset_control *of_reset_control_get(struct device_node *node,
+					   const char *id)
+{
+	int index = 0;
+
+	if (id) {
+		index = of_property_match_string(node,
+						 "reset-names", id);
+		if (index < 0)
+			return ERR_PTR(-ENOENT);
+	}
+	return of_reset_control_get_by_index(node, index);
+}
 EXPORT_SYMBOL_GPL(of_reset_control_get);
 
 /**
@@ -215,16 +235,10 @@ EXPORT_SYMBOL_GPL(of_reset_control_get);
  */
 struct reset_control *reset_control_get(struct device *dev, const char *id)
 {
-	struct reset_control *rstc;
-
 	if (!dev)
 		return ERR_PTR(-EINVAL);
 
-	rstc = of_reset_control_get(dev->of_node, id);
-	if (!IS_ERR(rstc))
-		rstc->dev = dev;
-
-	return rstc;
+	return of_reset_control_get(dev->of_node, id);
 }
 EXPORT_SYMBOL_GPL(reset_control_get);
 
diff --git a/drivers/reset/hisilicon/Kconfig b/drivers/reset/hisilicon/Kconfig
new file mode 100644
index 000000000..26bf95a83
--- /dev/null
+++ b/drivers/reset/hisilicon/Kconfig
@@ -0,0 +1,5 @@
+config COMMON_RESET_HI6220
+	tristate "Hi6220 Reset Driver"
+	depends on (ARCH_HISI && RESET_CONTROLLER)
+	help
+	  Build the Hisilicon Hi6220 reset driver.
diff --git a/drivers/reset/hisilicon/Makefile b/drivers/reset/hisilicon/Makefile
new file mode 100644
index 000000000..c932f86e2
--- /dev/null
+++ b/drivers/reset/hisilicon/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_COMMON_RESET_HI6220) += hi6220_reset.o
diff --git a/drivers/reset/hisilicon/hi6220_reset.c b/drivers/reset/hisilicon/hi6220_reset.c
new file mode 100644
index 000000000..7787a9b1c
--- /dev/null
+++ b/drivers/reset/hisilicon/hi6220_reset.c
@@ -0,0 +1,109 @@
+/*
+ * Hisilicon Hi6220 reset controller driver
+ *
+ * Copyright (c) 2015 Hisilicon Limited.
+ *
+ * Author: Feng Chen <puck.chen@hisilicon.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/bitops.h>
+#include <linux/of.h>
+#include <linux/reset-controller.h>
+#include <linux/reset.h>
+#include <linux/platform_device.h>
+
+#define ASSERT_OFFSET            0x300
+#define DEASSERT_OFFSET          0x304
+#define MAX_INDEX                0x509
+
+#define to_reset_data(x) container_of(x, struct hi6220_reset_data, rc_dev)
+
+struct hi6220_reset_data {
+	void __iomem			*assert_base;
+	void __iomem			*deassert_base;
+	struct reset_controller_dev	rc_dev;
+};
+
+static int hi6220_reset_assert(struct reset_controller_dev *rc_dev,
+			       unsigned long idx)
+{
+	struct hi6220_reset_data *data = to_reset_data(rc_dev);
+
+	int bank = idx >> 8;
+	int offset = idx & 0xff;
+
+	writel(BIT(offset), data->assert_base + (bank * 0x10));
+
+	return 0;
+}
+
+static int hi6220_reset_deassert(struct reset_controller_dev *rc_dev,
+				 unsigned long idx)
+{
+	struct hi6220_reset_data *data = to_reset_data(rc_dev);
+
+	int bank = idx >> 8;
+	int offset = idx & 0xff;
+
+	writel(BIT(offset), data->deassert_base + (bank * 0x10));
+
+	return 0;
+}
+
+static struct reset_control_ops hi6220_reset_ops = {
+	.assert = hi6220_reset_assert,
+	.deassert = hi6220_reset_deassert,
+};
+
+static int hi6220_reset_probe(struct platform_device *pdev)
+{
+	struct hi6220_reset_data *data;
+	struct resource *res;
+	void __iomem *src_base;
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	src_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(src_base))
+		return PTR_ERR(src_base);
+
+	data->assert_base = src_base + ASSERT_OFFSET;
+	data->deassert_base = src_base + DEASSERT_OFFSET;
+	data->rc_dev.nr_resets = MAX_INDEX;
+	data->rc_dev.ops = &hi6220_reset_ops;
+	data->rc_dev.of_node = pdev->dev.of_node;
+
+	reset_controller_register(&data->rc_dev);
+
+	return 0;
+}
+
+static const struct of_device_id hi6220_reset_match[] = {
+	{ .compatible = "hisilicon,hi6220-sysctrl" },
+	{ },
+};
+
+static struct platform_driver hi6220_reset_driver = {
+	.probe = hi6220_reset_probe,
+	.driver = {
+		.name = "reset-hi6220",
+		.of_match_table = hi6220_reset_match,
+	},
+};
+
+static int __init hi6220_reset_init(void)
+{
+	return platform_driver_register(&hi6220_reset_driver);
+}
+
+postcore_initcall(hi6220_reset_init);
diff --git a/drivers/reset/reset-ath79.c b/drivers/reset/reset-ath79.c
index 9aaf646ec..692fc890e 100644
--- a/drivers/reset/reset-ath79.c
+++ b/drivers/reset/reset-ath79.c
@@ -15,13 +15,17 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/reset-controller.h>
+#include <linux/reboot.h>
 
 struct ath79_reset {
 	struct reset_controller_dev rcdev;
+	struct notifier_block restart_nb;
 	void __iomem *base;
 	spinlock_t lock;
 };
 
+#define FULL_CHIP_RESET 24
+
 static int ath79_reset_update(struct reset_controller_dev *rcdev,
 			unsigned long id, bool assert)
 {
@@ -72,10 +76,22 @@ static struct reset_control_ops ath79_reset_ops = {
 	.status = ath79_reset_status,
 };
 
+static int ath79_reset_restart_handler(struct notifier_block *nb,
+				unsigned long action, void *data)
+{
+	struct ath79_reset *ath79_reset =
+		container_of(nb, struct ath79_reset, restart_nb);
+
+	ath79_reset_assert(&ath79_reset->rcdev, FULL_CHIP_RESET);
+
+	return NOTIFY_DONE;
+}
+
 static int ath79_reset_probe(struct platform_device *pdev)
 {
 	struct ath79_reset *ath79_reset;
 	struct resource *res;
+	int err;
 
 	ath79_reset = devm_kzalloc(&pdev->dev,
 				sizeof(*ath79_reset), GFP_KERNEL);
@@ -96,13 +112,25 @@ static int ath79_reset_probe(struct platform_device *pdev)
 	ath79_reset->rcdev.of_reset_n_cells = 1;
 	ath79_reset->rcdev.nr_resets = 32;
 
-	return reset_controller_register(&ath79_reset->rcdev);
+	err = reset_controller_register(&ath79_reset->rcdev);
+	if (err)
+		return err;
+
+	ath79_reset->restart_nb.notifier_call = ath79_reset_restart_handler;
+	ath79_reset->restart_nb.priority = 128;
+
+	err = register_restart_handler(&ath79_reset->restart_nb);
+	if (err)
+		dev_warn(&pdev->dev, "Failed to register restart handler\n");
+
+	return 0;
 }
 
 static int ath79_reset_remove(struct platform_device *pdev)
 {
 	struct ath79_reset *ath79_reset = platform_get_drvdata(pdev);
 
+	unregister_restart_handler(&ath79_reset->restart_nb);
 	reset_controller_unregister(&ath79_reset->rcdev);
 
 	return 0;
diff --git a/drivers/reset/reset-berlin.c b/drivers/reset/reset-berlin.c
index 3c922d372..970b1ad60 100644
--- a/drivers/reset/reset-berlin.c
+++ b/drivers/reset/reset-berlin.c
@@ -87,9 +87,7 @@ static int berlin2_reset_probe(struct platform_device *pdev)
 	priv->rcdev.of_reset_n_cells = 2;
 	priv->rcdev.of_xlate = berlin_reset_xlate;
 
-	reset_controller_register(&priv->rcdev);
-
-	return 0;
+	return reset_controller_register(&priv->rcdev);
 }
 
 static const struct of_device_id berlin_reset_dt_match[] = {
diff --git a/drivers/reset/reset-socfpga.c b/drivers/reset/reset-socfpga.c
index 1a6c5d66c..b7d773d92 100644
--- a/drivers/reset/reset-socfpga.c
+++ b/drivers/reset/reset-socfpga.c
@@ -133,9 +133,8 @@ static int socfpga_reset_probe(struct platform_device *pdev)
 	data->rcdev.nr_resets = NR_BANKS * BITS_PER_LONG;
 	data->rcdev.ops = &socfpga_reset_ops;
 	data->rcdev.of_node = pdev->dev.of_node;
-	reset_controller_register(&data->rcdev);
 
-	return 0;
+	return reset_controller_register(&data->rcdev);
 }
 
 static int socfpga_reset_remove(struct platform_device *pdev)
diff --git a/drivers/reset/reset-sunxi.c b/drivers/reset/reset-sunxi.c
index 3d95c8716..8d41a18da 100644
--- a/drivers/reset/reset-sunxi.c
+++ b/drivers/reset/reset-sunxi.c
@@ -108,9 +108,8 @@ static int sunxi_reset_init(struct device_node *np)
 	data->rcdev.nr_resets = size * 32;
 	data->rcdev.ops = &sunxi_reset_ops;
 	data->rcdev.of_node = np;
-	reset_controller_register(&data->rcdev);
 
-	return 0;
+	return reset_controller_register(&data->rcdev);
 
 err_alloc:
 	kfree(data);
@@ -122,7 +121,7 @@ err_alloc:
  * our system, before we can even think of using a regular device
  * driver for it.
  */
-static const struct of_device_id sunxi_early_reset_dt_ids[] __initdata = {
+static const struct of_device_id sunxi_early_reset_dt_ids[] __initconst = {
 	{ .compatible = "allwinner,sun6i-a31-ahb1-reset", },
 	{ /* sentinel */ },
 };
diff --git a/drivers/reset/reset-zynq.c b/drivers/reset/reset-zynq.c
index 89318a5d5..c6b3cd8b4 100644
--- a/drivers/reset/reset-zynq.c
+++ b/drivers/reset/reset-zynq.c
@@ -121,9 +121,8 @@ static int zynq_reset_probe(struct platform_device *pdev)
 	priv->rcdev.nr_resets = resource_size(res) / 4 * BITS_PER_LONG;
 	priv->rcdev.ops = &zynq_reset_ops;
 	priv->rcdev.of_node = pdev->dev.of_node;
-	reset_controller_register(&priv->rcdev);
 
-	return 0;
+	return reset_controller_register(&priv->rcdev);
 }
 
 static int zynq_reset_remove(struct platform_device *pdev)
diff --git a/drivers/reset/sti/reset-stih407.c b/drivers/reset/sti/reset-stih407.c
index 827eb3dae..6fb22af99 100644
--- a/drivers/reset/sti/reset-stih407.c
+++ b/drivers/reset/sti/reset-stih407.c
@@ -52,6 +52,7 @@ static const struct syscfg_reset_channel_data stih407_powerdowns[] = {
 };
 
 /* Reset Generator control 0/1 */
+#define SYSCFG_5128	0x200
 #define SYSCFG_5131	0x20c
 #define SYSCFG_5132	0x210
 
@@ -96,6 +97,10 @@ static const struct syscfg_reset_channel_data stih407_softresets[] = {
 	[STIH407_ERAM_HVA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 1),
 	[STIH407_LPM_SOFTRESET] = STIH407_SRST_SBC(SYSCFG_4002, 2),
 	[STIH407_KEYSCAN_SOFTRESET] = STIH407_SRST_LPM(LPM_SYSCFG_1, 8),
+	[STIH407_ST231_AUD_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 26),
+	[STIH407_ST231_DMU_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 27),
+	[STIH407_ST231_GP0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 28),
+	[STIH407_ST231_GP1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5128, 2),
 };
 
 /* PicoPHY reset/control */
diff --git a/drivers/reset/sti/reset-syscfg.c b/drivers/reset/sti/reset-syscfg.c
index a145cc066..1600cc755 100644
--- a/drivers/reset/sti/reset-syscfg.c
+++ b/drivers/reset/sti/reset-syscfg.c
@@ -103,17 +103,42 @@ static int syscfg_reset_deassert(struct reset_controller_dev *rcdev,
 static int syscfg_reset_dev(struct reset_controller_dev *rcdev,
 			    unsigned long idx)
 {
-	int err = syscfg_reset_assert(rcdev, idx);
+	int err;
+
+	err = syscfg_reset_assert(rcdev, idx);
 	if (err)
 		return err;
 
 	return syscfg_reset_deassert(rcdev, idx);
 }
 
+static int syscfg_reset_status(struct reset_controller_dev *rcdev,
+			       unsigned long idx)
+{
+	struct syscfg_reset_controller *rst = to_syscfg_reset_controller(rcdev);
+	const struct syscfg_reset_channel *ch;
+	u32 ret_val = 0;
+	int err;
+
+	if (idx >= rcdev->nr_resets)
+		return -EINVAL;
+
+	ch = &rst->channels[idx];
+	if (ch->ack)
+		err = regmap_field_read(ch->ack, &ret_val);
+	else
+		err = regmap_field_read(ch->reset, &ret_val);
+	if (err)
+		return err;
+
+	return rst->active_low ? !ret_val : !!ret_val;
+}
+
 static struct reset_control_ops syscfg_reset_ops = {
 	.reset    = syscfg_reset_dev,
 	.assert   = syscfg_reset_assert,
 	.deassert = syscfg_reset_deassert,
+	.status   = syscfg_reset_status,
 };
 
 static int syscfg_reset_controller_register(struct device *dev,