From 3d61a1f83effc3a7f2238d389e06f00110f0acdc Mon Sep 17 00:00:00 2001 From: Daniel Machon Date: Mon, 17 Apr 2023 20:03:30 +0200 Subject: [PATCH] phy: sparx5-serdes: configure optimal quiet mode for serdes lanes All the serdes lanes of the sparx5 will transition between normal mode and quiet mode, depending on activity. Make sure that the quiet mode is configured optimally for all lanes initially. Although not much, this will save a small amount of power. Signed-off-by: Daniel Machon Link: https://lore.kernel.org/r/20230417180335.2787494-3-daniel.machon@microchip.com Signed-off-by: Vinod Koul --- drivers/phy/microchip/sparx5_serdes.c | 32 +++++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) diff --git a/drivers/phy/microchip/sparx5_serdes.c b/drivers/phy/microchip/sparx5_serdes.c index ab1b098..6ba058b 100644 --- a/drivers/phy/microchip/sparx5_serdes.c +++ b/drivers/phy/microchip/sparx5_serdes.c @@ -26,6 +26,9 @@ #define SPX5_SERDES_10G_START 13 #define SPX5_SERDES_25G_START 25 +/* Optimal power settings from GUC */ +#define SPX5_SERDES_QUIET_MODE_VAL 0x01ef4e0c + enum sparx5_10g28cmu_mode { SPX5_SD10G28_CMU_MAIN = 0, SPX5_SD10G28_CMU_AUX1 = 1, @@ -1899,7 +1902,7 @@ static int sparx5_sd10g28_config(struct sparx5_serdes_macro *macro, bool reset) static int sparx5_serdes_power_save(struct sparx5_serdes_macro *macro, u32 pwdn) { struct sparx5_serdes_private *priv = macro->priv; - void __iomem *sd_inst; + void __iomem *sd_inst, *sd_lane_inst; if (macro->serdestype == SPX5_SDT_6G) sd_inst = sdx5_inst_get(priv, TARGET_SD6G_LANE, macro->stpidx); @@ -1909,12 +1912,36 @@ static int sparx5_serdes_power_save(struct sparx5_serdes_macro *macro, u32 pwdn) sd_inst = sdx5_inst_get(priv, TARGET_SD25G_LANE, macro->stpidx); if (macro->serdestype == SPX5_SDT_25G) { + sd_lane_inst = sdx5_inst_get(priv, TARGET_SD_LANE_25G, + macro->stpidx); + /* Take serdes out of reset */ + sdx5_inst_rmw(SD_LANE_25G_SD_LANE_CFG_EXT_CFG_RST_SET(0), + SD_LANE_25G_SD_LANE_CFG_EXT_CFG_RST, sd_lane_inst, + SD_LANE_25G_SD_LANE_CFG(0)); + + /* Configure optimal settings for quiet mode */ + sdx5_inst_rmw(SD_LANE_25G_QUIET_MODE_6G_QUIET_MODE_SET(SPX5_SERDES_QUIET_MODE_VAL), + SD_LANE_25G_QUIET_MODE_6G_QUIET_MODE, + sd_lane_inst, SD_LANE_25G_QUIET_MODE_6G(0)); + sdx5_inst_rmw(SD25G_LANE_LANE_04_LN_CFG_PD_DRIVER_SET(pwdn), SD25G_LANE_LANE_04_LN_CFG_PD_DRIVER, sd_inst, SD25G_LANE_LANE_04(0)); } else { /* 6G and 10G */ + sd_lane_inst = sdx5_inst_get(priv, TARGET_SD_LANE, macro->sidx); + + /* Take serdes out of reset */ + sdx5_inst_rmw(SD_LANE_SD_LANE_CFG_EXT_CFG_RST_SET(0), + SD_LANE_SD_LANE_CFG_EXT_CFG_RST, sd_lane_inst, + SD_LANE_SD_LANE_CFG(0)); + + /* Configure optimal settings for quiet mode */ + sdx5_inst_rmw(SD_LANE_QUIET_MODE_6G_QUIET_MODE_SET(SPX5_SERDES_QUIET_MODE_VAL), + SD_LANE_QUIET_MODE_6G_QUIET_MODE, sd_lane_inst, + SD_LANE_QUIET_MODE_6G(0)); + sdx5_inst_rmw(SD10G_LANE_LANE_06_CFG_PD_DRIVER_SET(pwdn), SD10G_LANE_LANE_06_CFG_PD_DRIVER, sd_inst, @@ -2308,6 +2335,9 @@ static int sparx5_phy_create(struct sparx5_serdes_private *priv, phy_set_drvdata(*phy, macro); + /* Power off serdes by default */ + sparx5_serdes_power_off(*phy); + return 0; } -- 2.7.4