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regulator: act8945a-regulator: unlock expert registers

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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@microchip.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Claudiu Beznea 2018-12-11 15:56:36 +00:00 committed by Mark Brown
parent f306d76082
commit 90bc8ac220
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GPG key ID: 24D68B725D5487D0
1 changed files with 12 additions and 1 deletions
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13
drivers/regulator/act8945a-regulator.c
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@ -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 = {