diff options
| author |   Anson Huang <Anson.Huang@nxp.com> | 2019-08-15 20:38:42 -0400 |
|---|---|---|
| committer |   Daniel Lezcano <daniel.lezcano@linaro.org> | 2019-08-27 00:31:39 +0200 |
| commit | 4419e19d8117dda6bccfbc62090e766f469ff20a (patch) | |
| tree | 40cde6606f21703137ef3173dadbadac02140a5e /drivers/clocksource | |
| parent | clocksource/drivers/tcb_clksrc: Register delay timer (diff) | |
| download | linux-dev-4419e19d8117dda6bccfbc62090e766f469ff20a.tar.xz linux-dev-4419e19d8117dda6bccfbc62090e766f469ff20a.zip | |
clocksource/drivers/imx-sysctr: Add internal clock divider handle
The system counter block guide states that the base clock is
internally divided by 3 before use, that means the clock input of
system counter defined in DT should be base clock which is normally
from OSC, and then internally divided by 3 before use.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/timer-imx-sysctr.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/clocksource/timer-imx-sysctr.c b/drivers/clocksource/timer-imx-sysctr.c index fd7d68066efb..b7c80a368a1b 100644 --- a/drivers/clocksource/timer-imx-sysctr.c +++ b/drivers/clocksource/timer-imx-sysctr.c @@ -20,6 +20,8 @@ #define SYS_CTR_EN 0x1 #define SYS_CTR_IRQ_MASK 0x2 +#define SYS_CTR_CLK_DIV 0x3 + static void __iomem *sys_ctr_base; static u32 cmpcr; @@ -134,6 +136,9 @@ static int __init sysctr_timer_init(struct device_node *np) if (ret) return ret; + /* system counter clock is divided by 3 internally */ + to_sysctr.of_clk.rate /= SYS_CTR_CLK_DIV; + sys_ctr_base = timer_of_base(&to_sysctr); cmpcr = readl(sys_ctr_base + CMPCR); cmpcr &= ~SYS_CTR_EN; |