diff options
Diffstat (limited to 'target/linux/mediatek/patches/0041-arm-mediatek-enable-gpt6-on-boot-up-to-make-arch-tim.patch')
| -rw-r--r-- | target/linux/mediatek/patches/0041-arm-mediatek-enable-gpt6-on-boot-up-to-make-arch-tim.patch | 63 |
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 + |