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Subject[PATCH 08/25] clocksource/drivers/imx-gpt: Add support for ARM64
Date
From: Anson Huang <anson.huang@nxp.com>

This patch allows building and compile-testing the i.MX GPT driver
also for ARM64. The delay_timer is only supported on ARMv7.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/clocksource/Kconfig | 2 +-
drivers/clocksource/timer-imx-gpt.c | 4 ++++
2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 64d5759ddf0e..8761a1c21b6c 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -567,7 +567,7 @@ config H8300_TPU

config CLKSRC_IMX_GPT
bool "Clocksource using i.MX GPT" if COMPILE_TEST
- depends on ARM && CLKDEV_LOOKUP
+ depends on (ARM || ARM64) && CLKDEV_LOOKUP
select CLKSRC_MMIO

config CLKSRC_IMX_TPM
diff --git a/drivers/clocksource/timer-imx-gpt.c b/drivers/clocksource/timer-imx-gpt.c
index 165fbbb1c9a0..a3d6ccbf4a16 100644
--- a/drivers/clocksource/timer-imx-gpt.c
+++ b/drivers/clocksource/timer-imx-gpt.c
@@ -141,21 +141,25 @@ static u64 notrace mxc_read_sched_clock(void)
return sched_clock_reg ? readl_relaxed(sched_clock_reg) : 0;
}

+#if defined(CONFIG_ARM)
static struct delay_timer imx_delay_timer;

static unsigned long imx_read_current_timer(void)
{
return readl_relaxed(sched_clock_reg);
}
+#endif

static int __init mxc_clocksource_init(struct imx_timer *imxtm)
{
unsigned int c = clk_get_rate(imxtm->clk_per);
void __iomem *reg = imxtm->base + imxtm->gpt->reg_tcn;

+#if defined(CONFIG_ARM)
imx_delay_timer.read_current_timer = &imx_read_current_timer;
imx_delay_timer.freq = c;
register_current_timer_delay(&imx_delay_timer);
+#endif

sched_clock_reg = reg;

--
2.17.1
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