diff options
| author | Tomas Melin <tomas.melin@vaisala.com> | 2026-01-22 13:53:45 +0000 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2026-03-04 07:20:50 -0500 |
| commit | 3800f5a1a541d1b2709c483f5150163d9c79be64 (patch) | |
| tree | d6dedbef90d554bed9f6f0ca7c46e61c9540d0db /drivers/rtc | |
| parent | 5774ea2dc5ce8c481420f00cd4991d15ce98c31e (diff) | |
rtc: zynqmp: correct frequency value
[ Upstream commit 2724fb4d429cbb724dcb6fa17953040918ebe3a2 ]
Fix calibration value in case a clock reference is provided.
The actual calibration value written into register is
frequency - 1.
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-v4-1-d4edb966b499@vaisala.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-zynqmp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-zynqmp.c b/drivers/rtc/rtc-zynqmp.c index 3baa2b481d9f..856bc1678e7d 100644 --- a/drivers/rtc/rtc-zynqmp.c +++ b/drivers/rtc/rtc-zynqmp.c @@ -345,7 +345,10 @@ static int xlnx_rtc_probe(struct platform_device *pdev) &xrtcdev->freq); if (ret) xrtcdev->freq = RTC_CALIB_DEF; + } else { + xrtcdev->freq--; } + ret = readl(xrtcdev->reg_base + RTC_CALIB_RD); if (!ret) writel(xrtcdev->freq, (xrtcdev->reg_base + RTC_CALIB_WR)); |