[PATCH V2 2/2] timer: imx-tpm: add imx tpm timer support
From: Alexander Stein <hidden>
Date: 2017-06-13 08:19:56
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On Tuesday 13 June 2017 15:58:45, Dong Aisheng wrote:
quoted hunk ↗ jump to hunk
diff --git a/drivers/clocksource/timer-imx-tpm.cb/drivers/clocksource/timer-imx-tpm.c new file mode 100644 index 0000000..940a4f75--- /dev/null +++ b/drivers/clocksource/timer-imx-tpm.c@@ -0,0 +1,227 @@[...] +static int tpm_set_next_event(unsigned long delta, + struct clock_event_device *evt) +{ + unsigned long next, now; + + next = readl(timer_base + TPM_CNT) + delta; + writel(next, timer_base + TPM_C0V); + now = readl(timer_base + TPM_CNT);
What about:
now = readl(timer_base + TPM_CNT); next = now + delta; writel(next, timer_base + TPM_C0V); return 0;
+ return (int)((next - now) <= 0) ? -ETIME : 0;
Can this error actually happen, even with your implementation? Best regards, Alexander