diff options
Diffstat (limited to 'target/linux/ramips/patches-3.10/0009-MIPS-ralink-add-support-for-reset-controller-API.patch')
| -rw-r--r-- | target/linux/ramips/patches-3.10/0009-MIPS-ralink-add-support-for-reset-controller-API.patch | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-3.10/0009-MIPS-ralink-add-support-for-reset-controller-API.patch b/target/linux/ramips/patches-3.10/0009-MIPS-ralink-add-support-for-reset-controller-API.patch new file mode 100644 index 0000000000..d0f7f20b7e --- /dev/null +++ b/target/linux/ramips/patches-3.10/0009-MIPS-ralink-add-support-for-reset-controller-API.patch @@ -0,0 +1,126 @@ +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(); |