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net: stmmac: qcom-ethqos: correct prg_rclk_dly comment

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The comment for calculating the prg_rclk_dly value is incorrect as it
omits the brackets around the divisor. Add the brackets to allow the
reader to correctly evaluate the value. Validated with the values given
in the driver.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>
Link: https://patch.msgid.link/E1w62ny-0000000E3D8-38Yp@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Russell King (Oracle) 2026-03-27 08:44:34 +00:00 committed by Jakub Kicinski
parent 67343aa24e
commit 2d350a892a
1 changed files with 4 additions and 2 deletions
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6
drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
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@ -450,8 +450,10 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos, int speed)
rgmii_setmask(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
SDCC_HC_REG_DDR_CONFIG);
} else {
/* PRG_RCLK_DLY = TCXO period * TCXO_CYCLES_CNT / 2 * RX delay ns,
* in practice this becomes PRG_RCLK_DLY = 52 * 4 / 2 * RX delay ns
/* PRG_RCLK_DLY = TCXO period * TCXO_CYCLES_CNT /
* (2 * RX delay ns),
* in practice this becomes PRG_RCLK_DLY = 52 * 4 /
* (2 * RX delay ns)
*/
if (ethqos->has_emac_ge_3) {
/* 0.9 ns */