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clocksource/drivers/imx-gpt: Add support for ARM64 

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>
hifive-unleashed-5.1
Anson Huang 2018-11-05 01:10:27 +00:00 committed by Daniel Lezcano
parent fa83c6f45a
commit df181e3828
2 changed files with 5 additions and 1 deletions
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2
drivers/clocksource/Kconfig
View File

@ -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

4
drivers/clocksource/timer-imx-gpt.c
View File

@ -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;