diff options
Diffstat (limited to 'drivers/regulator/ab8500.c')
| -rw-r--r-- | drivers/regulator/ab8500.c | 114 |
1 files changed, 113 insertions, 1 deletions
diff --git a/drivers/regulator/ab8500.c b/drivers/regulator/ab8500.c index d4d8c641378..6cc76430824 100644 --- a/drivers/regulator/ab8500.c +++ b/drivers/regulator/ab8500.c @@ -21,6 +21,8 @@ #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/regulator/ab8500.h> +#include <linux/mfd/ab8500/ab8500-gpio.h> /* for sysclkreq pins */ +#include <mach/gpio.h> /* for sysclkreq pins */ /** * struct ab8500_regulator_info - ab8500 regulator information @@ -40,6 +42,7 @@ * @voltages: supported voltage table * @voltages_len: number of supported voltages for the regulator * @delay: startup delay in ms + * @gpio_pin: gpio pin number (for sysclkreq regulator only) */ struct ab8500_regulator_info { struct device *dev; @@ -58,6 +61,7 @@ struct ab8500_regulator_info { int const *voltages; int voltages_len; unsigned int delay; + unsigned int gpio_pin; }; /* voltage tables for the vauxn/vintcore supplies */ @@ -325,6 +329,88 @@ static struct regulator_ops ab8500_regulator_fixed_ops = { .list_voltage = ab8500_list_voltage, }; +static int ab8500_sysclkreq_enable(struct regulator_dev *rdev) +{ + int ret; + struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); + + if (info == NULL) { + dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); + return -EINVAL; + } + + ret = ab8500_gpio_config_select(info->dev, info->gpio_pin, false); + if (ret < 0) { + dev_err(rdev_get_dev(rdev), + "couldn't set sysclkreq pin selection\n"); + return ret; + } + + dev_vdbg(rdev_get_dev(rdev), + "%s-enable (gpio_pin, gpio_select): %i, false\n", + info->desc.name, info->gpio_pin); + + return ret; +} + +static int ab8500_sysclkreq_disable(struct regulator_dev *rdev) +{ + int ret; + struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); + + if (info == NULL) { + dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); + return -EINVAL; + } + + ret = ab8500_gpio_config_select(info->dev, info->gpio_pin, true); + if (ret < 0) { + dev_err(rdev_get_dev(rdev), + "couldn't set gpio pin selection\n"); + return ret; + } + + dev_vdbg(rdev_get_dev(rdev), + "%s-disable (gpio_pin, gpio_select): %i, true\n", + info->desc.name, info->gpio_pin); + + return ret; +} + +static int ab8500_sysclkreq_is_enabled(struct regulator_dev *rdev) +{ + int ret; + struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); + bool gpio_select; + + if (info == NULL) { + dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); + return -EINVAL; + } + + ret = ab8500_gpio_config_get_select(info->dev, info->gpio_pin, + &gpio_select); + if (ret < 0) { + dev_err(rdev_get_dev(rdev), + "couldn't read gpio pin selection\n"); + return ret; + } + + dev_vdbg(rdev_get_dev(rdev), + "%s-is_enabled (gpio_pin, is_enabled): %i, %i\n", + info->desc.name, info->gpio_pin, !gpio_select); + + return !gpio_select; +} + +static struct regulator_ops ab8500_sysclkreq_ops = { + .enable = ab8500_sysclkreq_enable, + .disable = ab8500_sysclkreq_disable, + .is_enabled = ab8500_sysclkreq_is_enabled, + .get_voltage = ab8500_fixed_get_voltage, + .list_voltage = ab8500_list_voltage, +}; + static struct ab8500_regulator_info ab8500_regulator_info[AB8500_NUM_REGULATORS] = { /* @@ -510,7 +596,33 @@ static struct ab8500_regulator_info .update_val_enable = 0x04, }, - + /* + * SysClkReq regulators + */ + [AB8500_SYSCLKREQ_2] = { + .desc = { + .name = "SYSCLKREQ-2", + .ops = &ab8500_sysclkreq_ops, + .type = REGULATOR_VOLTAGE, + .id = AB8500_SYSCLKREQ_2, + .owner = THIS_MODULE, + .n_voltages = 1, + }, + .fixed_uV = 1, /* bogus value */ + .gpio_pin = AB8500_PIN_GPIO1, + }, + [AB8500_SYSCLKREQ_4] = { + .desc = { + .name = "SYSCLKREQ-4", + .ops = &ab8500_sysclkreq_ops, + .type = REGULATOR_VOLTAGE, + .id = AB8500_SYSCLKREQ_4, + .owner = THIS_MODULE, + .n_voltages = 1, + }, + .fixed_uV = 1, /* bogus value */ + .gpio_pin = AB8500_PIN_GPIO3, + }, }; struct ab8500_reg_init { |