From: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx> Unlock expert registers for act8945a. This is based on orginal work of Boris Brezillon at [1]. [1] https://www.spinics.net/lists/kernel/msg2942960.html Signed-off-by: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx> --- drivers/regulator/act8945a-regulator.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/regulator/act8945a-regulator.c b/drivers/regulator/act8945a-regulator.c index 43fda8b4455a..8d71d9893d0d 100644 --- a/drivers/regulator/act8945a-regulator.c +++ b/drivers/regulator/act8945a-regulator.c @@ -15,6 +15,7 @@ #include <linux/module.h> #include <linux/of_device.h> #include <linux/platform_device.h> +#include <linux/regmap.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> @@ -23,6 +24,7 @@ */ #define ACT8945A_SYS_MODE 0x00 #define ACT8945A_SYS_CTRL 0x01 +#define ACT8945A_SYS_UNLK_REGS 0x0b #define ACT8945A_DCDC1_VSET1 0x20 #define ACT8945A_DCDC1_VSET2 0x21 #define ACT8945A_DCDC1_CTRL 0x22 @@ -123,9 +125,17 @@ static int act8945a_pmic_probe(struct platform_device *pdev) struct regulator_config config = { }; const struct regulator_desc *regulators; struct regulator_dev *rdev; + struct regmap *regmap; int i, num_regulators; bool voltage_select; + regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!regmap) { + dev_err(&pdev->dev, + "could not retrieve regmap from parent device\n"); + return -EINVAL; + } + voltage_select = of_property_read_bool(pdev->dev.parent->of_node, "active-semi,vsel-high"); @@ -149,7 +159,8 @@ static int act8945a_pmic_probe(struct platform_device *pdev) } } - return 0; + /* Unlock expert registers. */ + return regmap_write(regmap, ACT8945A_SYS_UNLK_REGS, 0xef); } static struct platform_driver act8945a_pmic_driver = { -- 2.7.4
