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- From eec99287ace37015ed313b4fc27ba205a158b66c Mon Sep 17 00:00:00 2001
- From: Matthias Brugger <[email protected]>
- 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 <[email protected]>
- Signed-off-by: Yingjoe Chen <[email protected]>
- ---
- arch/arm/mach-mediatek/mediatek.c | 29 +++++++++++++++++++++++++++++
- 1 file changed, 29 insertions(+)
- --- 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_MACHINE_START(MEDIATEK_DT, "Mediatek Cortex-A7 (Device Tree)")
- .dt_compat = mediatek_board_dt_compat,
- + .init_time = mediatek_timer_init,
- MACHINE_END
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