From: Frieder Schrempf Date: Mon, 3 Mar 2025 13:22:54 +0000 (+0100) Subject: regulator: pca9450: Handle hardware with fixed SD_VSEL for LDO5 X-Git-Tag: v6.15-rc1~183^2~7 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c8c1ab2c5cb797fe455aa18b4ab7bf39897627f6;p=thirdparty%2Fkernel%2Flinux.git regulator: pca9450: Handle hardware with fixed SD_VSEL for LDO5 There are two ways to set the output voltage of the LD05 regulator. First by writing to the voltage selection registers and second by toggling the SD_VSEL signal. Usually board designers connect SD_VSEL to the VSELECT signal controlled by the USDHC controller, but in some cases the signal is hardwired to a fixed low level (therefore selecting 3.3V as initial value for allowing to boot from the SD card). In these cases, the voltage is only determined by the value of the LDO5CTRL_L register. Introduce a property nxp,sd-vsel-fixed-low to let the driver know that SD_VSEL is low and there is no GPIO to actually get that information from dynamically. Signed-off-by: Frieder Schrempf Link: https://patch.msgid.link/20250303132258.50204-1-frieder@fris.de Signed-off-by: Mark Brown --- diff --git a/drivers/regulator/pca9450-regulator.c b/drivers/regulator/pca9450-regulator.c index 8f81d813640d9..a56f3ab754fa9 100644 --- a/drivers/regulator/pca9450-regulator.c +++ b/drivers/regulator/pca9450-regulator.c @@ -36,6 +36,7 @@ struct pca9450 { enum pca9450_chip_type type; unsigned int rcnt; int irq; + bool sd_vsel_fixed_low; }; static const struct regmap_range pca9450_status_range = { @@ -102,6 +103,9 @@ static unsigned int pca9450_ldo5_get_reg_voltage_sel(struct regulator_dev *rdev) { struct pca9450 *pca9450 = rdev_get_drvdata(rdev); + if (pca9450->sd_vsel_fixed_low) + return PCA9450_REG_LDO5CTRL_L; + if (pca9450->sd_vsel_gpio && !gpiod_get_value(pca9450->sd_vsel_gpio)) return PCA9450_REG_LDO5CTRL_L; @@ -1100,6 +1104,9 @@ static int pca9450_i2c_probe(struct i2c_client *i2c) return ret; } + pca9450->sd_vsel_fixed_low = + of_property_read_bool(ldo5->dev.of_node, "nxp,sd-vsel-fixed-low"); + dev_info(&i2c->dev, "%s probed.\n", type == PCA9450_TYPE_PCA9450A ? "pca9450a" : (type == PCA9450_TYPE_PCA9451A ? "pca9451a" : "pca9450bc"));