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-rw-r--r--target/linux/mediatek/patches/0041-arm-mediatek-enable-gpt6-on-boot-up-to-make-arch-tim.patch63
1 files changed, 63 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches/0041-arm-mediatek-enable-gpt6-on-boot-up-to-make-arch-tim.patch b/target/linux/mediatek/patches/0041-arm-mediatek-enable-gpt6-on-boot-up-to-make-arch-tim.patch
new file mode 100644
index 0000000..728792c
--- /dev/null
+++ b/target/linux/mediatek/patches/0041-arm-mediatek-enable-gpt6-on-boot-up-to-make-arch-tim.patch
@@ -0,0 +1,63 @@
+From eec99287ace37015ed313b4fc27ba205a158b66c Mon Sep 17 00:00:00 2001
+From: Matthias Brugger <matthias.bgg@gmail.com>
+Date: Fri, 1 May 2015 15:43:26 +0800
+Subject: [PATCH 41/76] arm: mediatek: enable gpt6 on boot up to make arch
+ timer working
+
+We enable GTP6 which ungates the arch timer clock.
+In the future this should be done in the bootloader.
+
+Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
+Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
+---
+ arch/arm/mach-mediatek/mediatek.c | 29 +++++++++++++++++++++++++++++
+ 1 file changed, 29 insertions(+)
+
+diff --git a/arch/arm/mach-mediatek/mediatek.c b/arch/arm/mach-mediatek/mediatek.c
+index a954900..6b38d67 100644
+--- a/arch/arm/mach-mediatek/mediatek.c
++++ b/arch/arm/mach-mediatek/mediatek.c
+@@ -16,6 +16,34 @@
+ */
+ #include <linux/init.h>
+ #include <asm/mach/arch.h>
++#include <linux/of.h>
++#include <linux/clk-provider.h>
++#include <linux/clocksource.h>
++
++
++#define GPT6_CON_MT65xx 0x10008060
++#define GPT_ENABLE 0x31
++
++static void __init mediatek_timer_init(void)
++{
++ void __iomem *gpt_base = 0;
++
++ if (of_machine_is_compatible("mediatek,mt6589") ||
++ of_machine_is_compatible("mediatek,mt8135") ||
++ of_machine_is_compatible("mediatek,mt8127")) {
++ /* turn on GPT6 which ungates arch timer clocks */
++ gpt_base = ioremap(GPT6_CON_MT65xx, 0x04);
++ }
++
++ /* enabel clock and set to free-run */
++ if (gpt_base) {
++ writel(GPT_ENABLE, gpt_base);
++ iounmap(gpt_base);
++ }
++
++ of_clk_init(NULL);
++ clocksource_of_init();
++};
+
+ static const char * const mediatek_board_dt_compat[] = {
+ "mediatek,mt6589",
+@@ -27,4 +55,5 @@ static const char * const mediatek_board_dt_compat[] = {
+
+ DT_MACHINE_START(MEDIATEK_DT, "Mediatek Cortex-A7 (Device Tree)")
+ .dt_compat = mediatek_board_dt_compat,
++ .init_time = mediatek_timer_init,
+ MACHINE_END
+--
+1.7.10.4
+