9e5b0cc19c
Sync the patches with those sent upstream for v3.12. Signed-off-by: John Crispin <blogic@openwrt.org> SVN-Revision: 37778
126 lines
3.1 KiB
Diff
126 lines
3.1 KiB
Diff
From 4e694014a11a407e309f62c7daade545ba71dcf1 Mon Sep 17 00:00:00 2001
|
|
From: John Crispin <blogic@openwrt.org>
|
|
Date: Sun, 28 Jul 2013 13:54:22 +0200
|
|
Subject: [PATCH 09/25] MIPS: ralink: add support for reset-controller API
|
|
|
|
Add a helper for reseting different devices on the SoC.
|
|
|
|
Signed-off-by: John Crispin <blogic@openwrt.org>
|
|
---
|
|
arch/mips/Kconfig | 1 +
|
|
arch/mips/ralink/common.h | 2 ++
|
|
arch/mips/ralink/of.c | 3 +++
|
|
arch/mips/ralink/reset.c | 62 +++++++++++++++++++++++++++++++++++++++++++++
|
|
4 files changed, 68 insertions(+)
|
|
|
|
--- a/arch/mips/Kconfig
|
|
+++ b/arch/mips/Kconfig
|
|
@@ -373,6 +373,7 @@ config MACH_VR41XX
|
|
select CSRC_R4K
|
|
select SYS_HAS_CPU_VR41XX
|
|
select ARCH_REQUIRE_GPIOLIB
|
|
+ select ARCH_HAS_RESET_CONTROLLER
|
|
|
|
config NXP_STB220
|
|
bool "NXP STB220 board"
|
|
--- a/arch/mips/ralink/common.h
|
|
+++ b/arch/mips/ralink/common.h
|
|
@@ -46,6 +46,8 @@ extern void ralink_of_remap(void);
|
|
extern void ralink_clk_init(void);
|
|
extern void ralink_clk_add(const char *dev, unsigned long rate);
|
|
|
|
+extern void ralink_rst_init(void);
|
|
+
|
|
extern void prom_soc_init(struct ralink_soc_info *soc_info);
|
|
|
|
__iomem void *plat_of_remap_node(const char *node);
|
|
--- a/arch/mips/ralink/of.c
|
|
+++ b/arch/mips/ralink/of.c
|
|
@@ -110,6 +110,9 @@ static int __init plat_of_setup(void)
|
|
if (of_platform_populate(NULL, of_ids, NULL, NULL))
|
|
panic("failed to populate DT\n");
|
|
|
|
+ /* make sure ithat the reset controller is setup early */
|
|
+ ralink_rst_init();
|
|
+
|
|
return 0;
|
|
}
|
|
|
|
--- a/arch/mips/ralink/reset.c
|
|
+++ b/arch/mips/ralink/reset.c
|
|
@@ -10,6 +10,8 @@
|
|
|
|
#include <linux/pm.h>
|
|
#include <linux/io.h>
|
|
+#include <linux/of.h>
|
|
+#include <linux/reset-controller.h>
|
|
|
|
#include <asm/reboot.h>
|
|
|
|
@@ -19,6 +21,66 @@
|
|
#define SYSC_REG_RESET_CTRL 0x034
|
|
#define RSTCTL_RESET_SYSTEM BIT(0)
|
|
|
|
+static int ralink_assert_device(struct reset_controller_dev *rcdev,
|
|
+ unsigned long id)
|
|
+{
|
|
+ u32 val;
|
|
+
|
|
+ if (id < 8)
|
|
+ return -1;
|
|
+
|
|
+ val = rt_sysc_r32(SYSC_REG_RESET_CTRL);
|
|
+ val |= BIT(id);
|
|
+ rt_sysc_w32(val, SYSC_REG_RESET_CTRL);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int ralink_deassert_device(struct reset_controller_dev *rcdev,
|
|
+ unsigned long id)
|
|
+{
|
|
+ u32 val;
|
|
+
|
|
+ if (id < 8)
|
|
+ return -1;
|
|
+
|
|
+ val = rt_sysc_r32(SYSC_REG_RESET_CTRL);
|
|
+ val &= ~BIT(id);
|
|
+ rt_sysc_w32(val, SYSC_REG_RESET_CTRL);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int ralink_reset_device(struct reset_controller_dev *rcdev,
|
|
+ unsigned long id)
|
|
+{
|
|
+ ralink_assert_device(rcdev, id);
|
|
+ return ralink_deassert_device(rcdev, id);
|
|
+}
|
|
+
|
|
+static struct reset_control_ops reset_ops = {
|
|
+ .reset = ralink_reset_device,
|
|
+ .assert = ralink_assert_device,
|
|
+ .deassert = ralink_deassert_device,
|
|
+};
|
|
+
|
|
+static struct reset_controller_dev reset_dev = {
|
|
+ .ops = &reset_ops,
|
|
+ .owner = THIS_MODULE,
|
|
+ .nr_resets = 32,
|
|
+ .of_reset_n_cells = 1,
|
|
+};
|
|
+
|
|
+void ralink_rst_init(void)
|
|
+{
|
|
+ reset_dev.of_node = of_find_compatible_node(NULL, NULL,
|
|
+ "ralink,rt2880-reset");
|
|
+ if (!reset_dev.of_node)
|
|
+ pr_err("Failed to find reset controller node");
|
|
+ else
|
|
+ reset_controller_register(&reset_dev);
|
|
+}
|
|
+
|
|
static void ralink_restart(char *command)
|
|
{
|
|
local_irq_disable();
|