Merge remote-tracking branch 'docularxu/working-hikey-tracking-hisi-reset-v4.4' into lts-4.4.y-hikey

7 files changed, 283 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/reset/hisilicon,hi6220-reset.txt b/Documentation/devicetree/bindings/reset/hisilicon,hi6220-reset.txt
new file mode 100644
index 000000000000..d0f91c557e27
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/hisilicon,hi6220-reset.txt
@@ -0,0 +1,36 @@
+Hisilicon System Reset Controller
+======================================
+
+Please also refer to reset.txt in this directory for common reset
+controller binding usage.
+
+The reset controller registers are part of the system-ctl block on
+hi6220 SoC.
+
+Required properties:
+- compatible: should be one of the following:
+   "hisilicon,hi6220-sysctrl", "syscon" for peritheral reset,
+   "hisilicon,hi6220-pmctrl", "syscon" for media system reset.
+- reg: should be register base and length as documented in the
+  datasheet
+- #reset-cells: 1, see below
+
+Example:
+sys_ctrl: sys_ctrl@f7030000 {
+	compatible = "hisilicon,hi6220-sysctrl", "syscon";
+	reg = <0x0 0xf7030000 0x0 0x2000>;
+	#clock-cells = <1>;
+	#reset-cells = <1>;
+};
+
+Specifying reset lines connected to IP modules
+==============================================
+example:
+
+        uart1: serial@..... {
+                ...
+                resets = <&sys_ctrl PERIPH_RSTEN3_UART1>;
+                ...
+        };
+
+The index could be found in <dt-bindings/reset/hisi,hi6220-resets.h>.
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index 0615f50a14cd..df37212a5cbd 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 85d5904e5480..99e18c875e8a 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -4,5 +4,6 @@ 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-$(CONFIG_ATH79) += reset-ath79.o
diff --git a/drivers/reset/hisilicon/Kconfig b/drivers/reset/hisilicon/Kconfig
new file mode 100644
index 000000000000..26bf95a83a8e
--- /dev/null
+++ b/drivers/reset/hisilicon/Kconfig
@@ -0,0 +1,5 @@
+config COMMON_RESET_HI6220
+	tristate "Hi6220 Reset Driver"
+	depends on (ARCH_HISI && RESET_CONTROLLER)
+	help
+	  Build the Hisilicon Hi6220 reset driver.
diff --git a/drivers/reset/hisilicon/Makefile b/drivers/reset/hisilicon/Makefile
new file mode 100644
index 000000000000..c932f86e2f10
--- /dev/null
+++ b/drivers/reset/hisilicon/Makefile
@@ -0,0 +1 @@
+obj-$(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 000000000000..ad708bdb2448
--- /dev/null
+++ b/drivers/reset/hisilicon/hi6220_reset.c
@@ -0,0 +1,164 @@
+/*
+ * Hisilicon Hi6220 reset controller driver
+ *
+ * Copyright (c) 2015-2016 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/of_device.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/reset-controller.h>
+#include <linux/reset.h>
+#include <linux/platform_device.h>
+
+/*
+ * peripheral ctrl regs
+ */
+#define PERIPH_ASSERT_OFFSET      0x300
+#define PERIPH_DEASSERT_OFFSET    0x304
+#define PERIPH_MAX_INDEX          0x509
+
+/*
+ * media ctrl regs
+ */
+#define SC_MEDIA_RSTEN            0x052C
+#define SC_MEDIA_RSTDIS           0x0530
+#define MEDIA_MAX_INDEX           8
+
+enum hi6220_reset_ctrl_type {
+	PERIPHERAL,
+	MEDIA,
+};
+
+#define to_reset_data(x) container_of(x, struct hi6220_reset_data, rc_dev)
+
+struct hi6220_reset_data {
+	struct reset_controller_dev rc_dev;
+	enum hi6220_reset_ctrl_type type;
+	struct regmap *regmap;
+};
+
+static int hi6220_media_assert(struct reset_controller_dev *rc_dev,
+			       unsigned long idx)
+{
+	struct hi6220_reset_data *data = to_reset_data(rc_dev);
+	struct regmap *regmap = data->regmap;
+
+	return regmap_write(regmap, SC_MEDIA_RSTEN, BIT(idx));
+}
+
+static int hi6220_media_deassert(struct reset_controller_dev *rc_dev,
+				 unsigned long idx)
+{
+	struct hi6220_reset_data *data = to_reset_data(rc_dev);
+	struct regmap *regmap = data->regmap;
+
+	return regmap_write(regmap, SC_MEDIA_RSTDIS, BIT(idx));
+}
+
+static int hi6220_peripheral_assert(struct reset_controller_dev *rc_dev,
+				    unsigned long idx)
+{
+	struct hi6220_reset_data *data = to_reset_data(rc_dev);
+	struct regmap *regmap = data->regmap;
+	u32 bank = idx >> 8;
+	u32 offset = idx & 0xff;
+	u32 reg = PERIPH_ASSERT_OFFSET + bank * 0x10;
+
+	return regmap_write(regmap, reg, BIT(offset));
+}
+
+static int hi6220_peripheral_deassert(struct reset_controller_dev *rc_dev,
+				      unsigned long idx)
+{
+	struct hi6220_reset_data *data = to_reset_data(rc_dev);
+	struct regmap *regmap = data->regmap;
+	u32 bank = idx >> 8;
+	u32 offset = idx & 0xff;
+	u32 reg = PERIPH_DEASSERT_OFFSET + bank * 0x10;
+
+	return regmap_write(regmap, reg, BIT(offset));
+}
+
+static const struct reset_control_ops hi6220_media_reset_ops = {
+	.assert = hi6220_media_assert,
+	.deassert = hi6220_media_deassert,
+};
+
+static const struct reset_control_ops hi6220_peripheral_reset_ops = {
+	.assert = hi6220_peripheral_assert,
+	.deassert = hi6220_peripheral_deassert,
+};
+
+static int hi6220_reset_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct device *dev = &pdev->dev;
+	enum hi6220_reset_ctrl_type type;
+	struct hi6220_reset_data *data;
+	struct regmap *regmap;
+
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	type = (enum hi6220_reset_ctrl_type)of_device_get_match_data(dev);
+
+	regmap = syscon_node_to_regmap(np);
+	if (IS_ERR(regmap)) {
+		dev_err(dev, "failed to get reset controller regmap\n");
+		return PTR_ERR(regmap);
+	}
+
+	data->type = type;
+	data->regmap = regmap;
+	data->rc_dev.of_node = np;
+	if (type == MEDIA) {
+		data->rc_dev.ops = &hi6220_media_reset_ops;
+		data->rc_dev.nr_resets = MEDIA_MAX_INDEX;
+	} else {
+		data->rc_dev.ops = &hi6220_peripheral_reset_ops;
+		data->rc_dev.nr_resets = PERIPH_MAX_INDEX;
+	}
+
+	return reset_controller_register(&data->rc_dev);
+}
+
+static const struct of_device_id hi6220_reset_match[] = {
+	{
+		.compatible = "hisilicon,hi6220-sysctrl",
+		.data = (void *)PERIPHERAL,
+	},
+	{
+		.compatible = "hisilicon,hi6220-mediactrl",
+		.data = (void *)MEDIA,
+	},
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, hi6220_reset_match);
+
+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/include/dt-bindings/reset/hisi,hi6220-resets.h b/include/dt-bindings/reset/hisi,hi6220-resets.h
new file mode 100644
index 000000000000..322ec5335b65
--- /dev/null
+++ b/include/dt-bindings/reset/hisi,hi6220-resets.h
@@ -0,0 +1,75 @@
+/**
+ * This header provides index for the reset controller
+ * based on hi6220 SoC.
+ */
+#ifndef _DT_BINDINGS_RESET_CONTROLLER_HI6220
+#define _DT_BINDINGS_RESET_CONTROLLER_HI6220
+
+#define PERIPH_RSTDIS0_MMC0             0x000
+#define PERIPH_RSTDIS0_MMC1             0x001
+#define PERIPH_RSTDIS0_MMC2             0x002
+#define PERIPH_RSTDIS0_NANDC            0x003
+#define PERIPH_RSTDIS0_USBOTG_BUS       0x004
+#define PERIPH_RSTDIS0_POR_PICOPHY      0x005
+#define PERIPH_RSTDIS0_USBOTG           0x006
+#define PERIPH_RSTDIS0_USBOTG_32K       0x007
+#define PERIPH_RSTDIS1_HIFI             0x100
+#define PERIPH_RSTDIS1_DIGACODEC        0x105
+#define PERIPH_RSTEN2_IPF               0x200
+#define PERIPH_RSTEN2_SOCP              0x201
+#define PERIPH_RSTEN2_DMAC              0x202
+#define PERIPH_RSTEN2_SECENG            0x203
+#define PERIPH_RSTEN2_ABB               0x204
+#define PERIPH_RSTEN2_HPM0              0x205
+#define PERIPH_RSTEN2_HPM1              0x206
+#define PERIPH_RSTEN2_HPM2              0x207
+#define PERIPH_RSTEN2_HPM3              0x208
+#define PERIPH_RSTEN3_CSSYS             0x300
+#define PERIPH_RSTEN3_I2C0              0x301
+#define PERIPH_RSTEN3_I2C1              0x302
+#define PERIPH_RSTEN3_I2C2              0x303
+#define PERIPH_RSTEN3_I2C3              0x304
+#define PERIPH_RSTEN3_UART1             0x305
+#define PERIPH_RSTEN3_UART2             0x306
+#define PERIPH_RSTEN3_UART3             0x307
+#define PERIPH_RSTEN3_UART4             0x308
+#define PERIPH_RSTEN3_SSP               0x309
+#define PERIPH_RSTEN3_PWM               0x30a
+#define PERIPH_RSTEN3_BLPWM             0x30b
+#define PERIPH_RSTEN3_TSENSOR           0x30c
+#define PERIPH_RSTEN3_DAPB              0x312
+#define PERIPH_RSTEN3_HKADC             0x313
+#define PERIPH_RSTEN3_CODEC_SSI         0x314
+#define PERIPH_RSTEN3_PMUSSI1           0x316
+#define PERIPH_RSTEN8_RS0               0x400
+#define PERIPH_RSTEN8_RS2               0x401
+#define PERIPH_RSTEN8_RS3               0x402
+#define PERIPH_RSTEN8_MS0               0x403
+#define PERIPH_RSTEN8_MS2               0x405
+#define PERIPH_RSTEN8_XG2RAM0           0x406
+#define PERIPH_RSTEN8_X2SRAM_TZMA       0x407
+#define PERIPH_RSTEN8_SRAM              0x408
+#define PERIPH_RSTEN8_HARQ              0x40a
+#define PERIPH_RSTEN8_DDRC              0x40c
+#define PERIPH_RSTEN8_DDRC_APB          0x40d
+#define PERIPH_RSTEN8_DDRPACK_APB       0x40e
+#define PERIPH_RSTEN8_DDRT              0x411
+#define PERIPH_RSDIST9_CARM_DAP         0x500
+#define PERIPH_RSDIST9_CARM_ATB         0x501
+#define PERIPH_RSDIST9_CARM_LBUS        0x502
+#define PERIPH_RSDIST9_CARM_POR         0x503
+#define PERIPH_RSDIST9_CARM_CORE        0x504
+#define PERIPH_RSDIST9_CARM_DBG         0x505
+#define PERIPH_RSDIST9_CARM_L2          0x506
+#define PERIPH_RSDIST9_CARM_SOCDBG      0x507
+#define PERIPH_RSDIST9_CARM_ETM         0x508
+
+#define MEDIA_G3D                       0
+#define MEDIA_CODEC_VPU                 2
+#define MEDIA_CODEC_JPEG                3
+#define MEDIA_ISP                       4
+#define MEDIA_ADE                       5
+#define MEDIA_MMU                       6
+#define MEDIA_XG2RAM1                   7
+
+#endif /*_DT_BINDINGS_RESET_CONTROLLER_HI6220*/