clk: rockchip: add restart handler
From: Heiko Stuebner <heiko@...> Date: Sun, 6 Jul 2014 13:35:31 +0200
Commit-Message
Add infrastructure to write the correct value to the restart register and register the restart notifier for both rk3188 (including rk3066) and rk3288. Signed-off-by: Heiko Stuebner <heiko@...>
Patch-Comment
This of course needs the restart generalization from Guenter Roeck and would need to go with that series. changes since v1: - adapt to changed restart notifier handling drivers/clk/rockchip/clk-rk3188.c | 2 ++ drivers/clk/rockchip/clk-rk3288.c | 2 ++ drivers/clk/rockchip/clk.c | 25 +++++++++++++++++++++++++ drivers/clk/rockchip/clk.h | 1 + 4 files changed, 30 insertions(+)
Statistics
- 30 lines added
- 0 lines removed
Changes
---------------------- drivers/clk/rockchip/clk-rk3188.c -----------------------
index a83a6d8..71b661a 100644
@@ -631,6 +631,8 @@ static void __init rk3188_common_clk_init(struct device_node *np)
rockchip_register_softrst(np, 9, reg_base + RK2928_SOFTRST_CON(0),
ROCKCHIP_SOFTRST_HIWORD_MASK);
+
+ rockchip_register_restart_notifier(RK2928_GLB_SRST_FST);
}
static void __init rk3066a_clk_init(struct device_node *np)
---------------------- drivers/clk/rockchip/clk-rk3288.c -----------------------
index 0d8c6c5..b604217 100644
@@ -713,5 +713,7 @@ static void __init rk3288_clk_init(struct device_node *np)
rockchip_register_softrst(np, 9, reg_base + RK3288_SOFTRST_CON(0),
ROCKCHIP_SOFTRST_HIWORD_MASK);
+
+ rockchip_register_restart_notifier(RK3288_GLB_SRST_FST);
}
CLK_OF_DECLARE(rk3288_cru, "rockchip,rk3288-cru", rk3288_clk_init);
-------------------------- drivers/clk/rockchip/clk.c --------------------------
index 278cf9d..aa41433 100644
@@ -25,6 +25,7 @@
#include <linux/clk-provider.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
+#include <linux/reboot.h>
#include "clk.h"
/**
@@ -242,3 +243,27 @@ void __init rockchip_clk_register_branches(
rockchip_clk_add_lookup(clk, list->id);
}
}
+
+static unsigned int reg_restart;
+static int rockchip_restart_notify(struct notifier_block *this,
+ unsigned long mode, void *cmd)
+{
+ writel(0xfdb9, reg_base + reg_restart);
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block rockchip_restart_handler = {
+ .notifier_call = rockchip_restart_notify,
+ .priority = 128,
+};
+
+void __init rockchip_register_restart_notifier(unsigned int reg)
+{
+ int ret;
+
+ reg_restart = reg;
+ ret = register_restart_handler(&rockchip_restart_handler);
+ if (ret)
+ pr_err("%s: cannot register restart handler, %d\n",
+ __func__, ret);
+}
-------------------------- drivers/clk/rockchip/clk.h --------------------------
index 887cbde..0b5eab5 100644
@@ -329,6 +329,7 @@ void rockchip_clk_register_branches(struct rockchip_clk_branch *clk_list,
unsigned int nr_clk);
void rockchip_clk_register_plls(struct rockchip_pll_clock *pll_list,
unsigned int nr_pll, int grf_lock_offset);
+void rockchip_register_restart_notifier(unsigned int reg);
#define ROCKCHIP_SOFTRST_HIWORD_MASK BIT(0)