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| author | Matthias Brugger <matthias.bgg@gmail.com> | 2015-10-02 23:19:37 +0800 |
|---|---|---|
| committer | Matthias Brugger <matthias.bgg@gmail.com> | 2015-10-14 15:34:44 +0200 |
| commit | 9821e545c5e02ac28af7c595ce71d037a1f74dc9 (patch) | |
| tree | 987f838e8baaeb2ea808b630f87dde5ba9db481b /arch/arm/mach-mediatek/mediatek.c | |
| parent | 41b3e0f067c26dd17837aa49fba13fcb5c6319e1 (diff) | |
| download | op-kernel-dev-9821e545c5e02ac28af7c595ce71d037a1f74dc9.zip op-kernel-dev-9821e545c5e02ac28af7c595ce71d037a1f74dc9.tar.gz | |
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>
Diffstat (limited to 'arch/arm/mach-mediatek/mediatek.c')
| -rw-r--r-- | arch/arm/mach-mediatek/mediatek.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/arm/mach-mediatek/mediatek.c b/arch/arm/mach-mediatek/mediatek.c index a954900..19dc738 100644 --- a/arch/arm/mach-mediatek/mediatek.c +++ b/arch/arm/mach-mediatek/mediatek.c @@ -16,6 +16,32 @@ */ #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; + + 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); + + /* enable clock and set to free-run */ + 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 +53,5 @@ 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 |
