[PATCH V2 1/2] clocksource: imx-gpt: add support for ARM64

[Anson Huang]

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.hu...@nxp.com>
---
no change since V1.
 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 55c77e4..5e892ca 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -580,7 +580,7 @@ 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 165fbbb..a3d6ccb 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;
 
-- 
2.7.4