diff options
| author | Daniel Machon <daniel.machon@microchip.com> | 2023-04-17 20:03:32 +0200 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-05-08 13:43:01 +0200 |
| commit | 044f3a1a8d331ef1a96a8445cafb8a23376cbf52 (patch) | |
| tree | 5423c7aba48f4b2b87843d3b5601efd4b9b3ca15 /drivers/phy | |
| parent | phy: sparx5-serdes: reorder CMU functions (diff) | |
| download | linux-044f3a1a8d331ef1a96a8445cafb8a23376cbf52.tar.xz linux-044f3a1a8d331ef1a96a8445cafb8a23376cbf52.zip | |
phy: sparx5-serdes: power down all CMUs by default
All CMUs are powered up initially. This uses needless power. This patch
makes sure all CMUs are powered down by default. This involves
configuring a number reference clock and power-down registers of the
CMU.
Individual CMUs are later powered up, when the serdes lanes are
configured.
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Link: https://lore.kernel.org/r/20230417180335.2787494-5-daniel.machon@microchip.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/phy')
| -rw-r--r-- | drivers/phy/microchip/sparx5_serdes.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/phy/microchip/sparx5_serdes.c b/drivers/phy/microchip/sparx5_serdes.c index d8620e0fae7b..0e9db7b36b60 100644 --- a/drivers/phy/microchip/sparx5_serdes.c +++ b/drivers/phy/microchip/sparx5_serdes.c @@ -1078,6 +1078,54 @@ leave: return err; } +static void sparx5_serdes_cmu_power_off(struct sparx5_serdes_private *priv) +{ + void __iomem *cmu_inst, *cmu_cfg_inst; + int i; + + /* Power down each CMU */ + for (i = 0; i < SPX5_CMU_MAX; i++) { + cmu_inst = sdx5_inst_get(priv, TARGET_SD_CMU, i); + cmu_cfg_inst = sdx5_inst_get(priv, TARGET_SD_CMU_CFG, i); + + sdx5_inst_rmw(SD_CMU_CFG_SD_CMU_CFG_EXT_CFG_RST_SET(0), + SD_CMU_CFG_SD_CMU_CFG_EXT_CFG_RST, cmu_cfg_inst, + SD_CMU_CFG_SD_CMU_CFG(0)); + + sdx5_inst_rmw(SD_CMU_CMU_05_CFG_REFCK_TERM_EN_SET(0), + SD_CMU_CMU_05_CFG_REFCK_TERM_EN, cmu_inst, + SD_CMU_CMU_05(0)); + + sdx5_inst_rmw(SD_CMU_CMU_09_CFG_EN_TX_CK_DN_SET(0), + SD_CMU_CMU_09_CFG_EN_TX_CK_DN, cmu_inst, + SD_CMU_CMU_09(0)); + + sdx5_inst_rmw(SD_CMU_CMU_06_CFG_VCO_PD_SET(1), + SD_CMU_CMU_06_CFG_VCO_PD, cmu_inst, + SD_CMU_CMU_06(0)); + + sdx5_inst_rmw(SD_CMU_CMU_09_CFG_EN_TX_CK_UP_SET(0), + SD_CMU_CMU_09_CFG_EN_TX_CK_UP, cmu_inst, + SD_CMU_CMU_09(0)); + + sdx5_inst_rmw(SD_CMU_CMU_08_CFG_CK_TREE_PD_SET(1), + SD_CMU_CMU_08_CFG_CK_TREE_PD, cmu_inst, + SD_CMU_CMU_08(0)); + + sdx5_inst_rmw(SD_CMU_CMU_0D_CFG_REFCK_PD_SET(1) | + SD_CMU_CMU_0D_CFG_PD_DIV64_SET(1) | + SD_CMU_CMU_0D_CFG_PD_DIV66_SET(1), + SD_CMU_CMU_0D_CFG_REFCK_PD | + SD_CMU_CMU_0D_CFG_PD_DIV64 | + SD_CMU_CMU_0D_CFG_PD_DIV66, cmu_inst, + SD_CMU_CMU_0D(0)); + + sdx5_inst_rmw(SD_CMU_CMU_06_CFG_CTRL_LOGIC_PD_SET(1), + SD_CMU_CMU_06_CFG_CTRL_LOGIC_PD, cmu_inst, + SD_CMU_CMU_06(0)); + } +} + static void sparx5_sd25g28_reset(void __iomem *regs[], struct sparx5_sd25g28_params *params, u32 sd_index) @@ -2521,6 +2569,9 @@ static int sparx5_serdes_probe(struct platform_device *pdev) return err; } + /* Power down all CMUs by default */ + sparx5_serdes_cmu_power_off(priv); + provider = devm_of_phy_provider_register(priv->dev, sparx5_serdes_xlate); return PTR_ERR_OR_ZERO(provider); |