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rtc: zynqmp: check calibration max value

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Enable check to not overflow the calibration
max value.

Reviewed-by: Harini T <harini.t@amd.com>
Tested-by: Harini T <harini.t@amd.com>
Signed-off-by: Tomas Melin <tomas.melin@vaisala.com>
Acked-by: Michal Simek <michal.simek@amd.com>
Link: https://patch.msgid.link/20260122-zynqmp-rtc-updates-v4-2-d4edb966b499@vaisala.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Tomas Melin 2026-01-22 13:53:46 +00:00 committed by Alexandre Belloni
parent 2724fb4d42
commit 83b9e5eb04
1 changed files with 5 additions and 0 deletions
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5
drivers/rtc/rtc-zynqmp.c
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@ -349,6 +349,11 @@ static int xlnx_rtc_probe(struct platform_device *pdev)
xrtcdev->freq--;
}
if (xrtcdev->freq > RTC_TICK_MASK) {
dev_err(&pdev->dev, "Invalid RTC calibration value\n");
return -EINVAL;
}
ret = readl(xrtcdev->reg_base + RTC_CALIB_RD);
if (!ret)
writel(xrtcdev->freq, (xrtcdev->reg_base + RTC_CALIB_WR));