diff options
| author | Sean Anderson <sean.anderson@seco.com> | 2023-07-11 22:45:39 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-07-12 19:57:44 +0300 |
| commit | 76009ee76e05e30e29aade02e788aebe9ce9ffd2 (patch) | |
| tree | dd53844fa229dd28d81495159d9af6af36803b95 /drivers/phy/xilinx | |
| parent | 20b5c6ae18ffdbac410f1711c932cf0fd80d2539 (diff) | |
| download | linux-76009ee76e05e30e29aade02e788aebe9ce9ffd2.tar.xz | |
phy: zynqmp: Allow variation in refclk rate
Due to limited available frequency ratios, the reference clock rate may
not be exactly the same as the required rate. Allow a small (100 ppm)
deviation.
Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Link: https://lore.kernel.org/r/20230711194542.898230-1-sean.anderson@seco.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/phy/xilinx')
| -rw-r--r-- | drivers/phy/xilinx/phy-zynqmp.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/phy/xilinx/phy-zynqmp.c b/drivers/phy/xilinx/phy-zynqmp.c index b0c2045b886e..2559c6594cea 100644 --- a/drivers/phy/xilinx/phy-zynqmp.c +++ b/drivers/phy/xilinx/phy-zynqmp.c @@ -904,7 +904,10 @@ static int xpsgtr_get_ref_clocks(struct xpsgtr_dev *gtr_dev) rate = clk_get_rate(clk); for (i = 0 ; i < ARRAY_SIZE(ssc_lookup); i++) { - if (rate == ssc_lookup[i].refclk_rate) { + /* Allow an error of 100 ppm */ + unsigned long error = ssc_lookup[i].refclk_rate / 10000; + + if (abs(rate - ssc_lookup[i].refclk_rate) < error) { gtr_dev->refclk_sscs[refclk] = &ssc_lookup[i]; break; } |