sunxi: initial 3.14 patchset

[openwrt/openwrt.git] / target / linux / sunxi / patches-3.14 / 176-clk-sun5i-add-support-for-reset-ctrler.patch

diff --git a/target/linux/sunxi/patches-3.14/176-clk-sun5i-add-support-for-reset-ctrler.patch b/target/linux/sunxi/patches-3.14/176-clk-sun5i-add-support-for-reset-ctrler.patch
new file mode 100644 (file)
index 0000000..6d322c7
--- /dev/null
+++ b/target/linux/sunxi/patches-3.14/176-clk-sun5i-add-support-for-reset-ctrler.patch
@@ -0,0 +1,69 @@
+From 3ec31fa2ce161d35f787354037f94d9d22d825d1 Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime.ripard@free-electrons.com>
+Date: Fri, 20 Dec 2013 22:41:08 +0100
+Subject: [PATCH] clocksource: sun5i: Add support for reset controller
+
+The Allwinner A31 that uses this timer has the timer IP asserted in reset.
+Add an optional reset property to the DT, and deassert the timer from reset if
+it's there.
+
+Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
+---
+ .../devicetree/bindings/timer/allwinner,sun5i-a13-hstimer.txt       | 4 ++++
+ drivers/clocksource/timer-sun5i.c                                   | 6 ++++++
+ 2 files changed, 10 insertions(+)
+
+diff --git a/Documentation/devicetree/bindings/timer/allwinner,sun5i-a13-hstimer.txt b/Documentation/devicetree/bindings/timer/allwinner,sun5i-a13-hstimer.txt
+index 7c26154..27cfc7d 100644
+--- a/Documentation/devicetree/bindings/timer/allwinner,sun5i-a13-hstimer.txt
++++ b/Documentation/devicetree/bindings/timer/allwinner,sun5i-a13-hstimer.txt
+@@ -9,6 +9,9 @@ Required properties:
+               one)
+ - clocks: phandle to the source clock (usually the AHB clock)
+ 
++Optionnal properties:
++- resets: phandle to a reset controller asserting the timer
++
+ Example:
+ 
+ timer@01c60000 {
+@@ -19,4 +22,5 @@ timer@01c60000 {
+                    <0 53 1>,
+                    <0 54 1>;
+       clocks = <&ahb1_gates 19>;
++      resets = <&ahb1rst 19>;
+ };
+diff --git a/drivers/clocksource/timer-sun5i.c b/drivers/clocksource/timer-sun5i.c
+index deebcd6..0226844 100644
+--- a/drivers/clocksource/timer-sun5i.c
++++ b/drivers/clocksource/timer-sun5i.c
+@@ -16,6 +16,7 @@
+ #include <linux/interrupt.h>
+ #include <linux/irq.h>
+ #include <linux/irqreturn.h>
++#include <linux/reset.h>
+ #include <linux/sched_clock.h>
+ #include <linux/of.h>
+ #include <linux/of_address.h>
+@@ -143,6 +144,7 @@ static u64 sun5i_timer_sched_read(void)
+ 
+ static void __init sun5i_timer_init(struct device_node *node)
+ {
++      struct reset_control *rstc;
+       unsigned long rate;
+       struct clk *clk;
+       int ret, irq;
+@@ -162,6 +164,10 @@ static void __init sun5i_timer_init(struct device_node *node)
+       clk_prepare_enable(clk);
+       rate = clk_get_rate(clk);
+ 
++      rstc = of_reset_control_get(node, NULL);
++      if (!IS_ERR(rstc))
++              reset_control_deassert(rstc);
++
+       writel(~0, timer_base + TIMER_INTVAL_LO_REG(1));
+       writel(TIMER_CTL_ENABLE | TIMER_CTL_RELOAD,
+              timer_base + TIMER_CTL_REG(1));
+-- 
+2.0.3
+