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mfd: Move arizona digital core supply management to the regulator API 

Rather than open coding the enable GPIO control in the MFD core use the
API to push the management on to the regulator driver. The immediate
advantage is slight for most systems but this will in future allow device
configurations where an external regulator is used for DCVDD.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Mark Brown 2012-07-09 00:31:36 +02:00 committed by Samuel Ortiz
parent 14b5bd5cf5
commit 59db96913c
2 changed files with 36 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
drivers/mfd/arizona-core.c
View File

@ -11,6 +11,7 @@
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
@ -28,7 +29,6 @@
static const char *wm5102_core_supplies[] = {
"AVDD",
"DBVDD1",
"DCVDD",
};
int arizona_clk32k_enable(struct arizona *arizona)
@ -223,8 +223,11 @@ static int arizona_runtime_resume(struct device *dev)
struct arizona *arizona = dev_get_drvdata(dev);
int ret;
if (arizona->pdata.ldoena)
gpio_set_value_cansleep(arizona->pdata.ldoena, 1);
ret = regulator_enable(arizona->dcvdd);
if (ret != 0) {
dev_err(arizona->dev, "Failed to enable DCVDD: %d\n", ret);
return ret;
}
regcache_cache_only(arizona->regmap, false);
@ -241,11 +244,9 @@ static int arizona_runtime_suspend(struct device *dev)
{
struct arizona *arizona = dev_get_drvdata(dev);
if (arizona->pdata.ldoena) {
gpio_set_value_cansleep(arizona->pdata.ldoena, 0);
regulator_disable(arizona->dcvdd);
regcache_cache_only(arizona->regmap, true);
regcache_mark_dirty(arizona->regmap);
}
return 0;
}
@ -314,6 +315,13 @@ int __devinit arizona_dev_init(struct arizona *arizona)
goto err_early;
}
arizona->dcvdd = devm_regulator_get(arizona->dev, "DCVDD");
if (IS_ERR(arizona->dcvdd)) {
ret = PTR_ERR(arizona->dcvdd);
dev_err(dev, "Failed to request DCVDD: %d\n", ret);
goto err_early;
}
ret = regulator_bulk_enable(arizona->num_core_supplies,
arizona->core_supplies);
if (ret != 0) {
@ -322,6 +330,12 @@ int __devinit arizona_dev_init(struct arizona *arizona)
goto err_early;
}
ret = regulator_enable(arizona->dcvdd);
if (ret != 0) {
dev_err(dev, "Failed to enable DCVDD: %d\n", ret);
goto err_enable;
}
if (arizona->pdata.reset) {
/* Start out with /RESET low to put the chip into reset */
ret = gpio_request_one(arizona->pdata.reset,
@ -329,35 +343,25 @@ int __devinit arizona_dev_init(struct arizona *arizona)
"arizona /RESET");
if (ret != 0) {
dev_err(dev, "Failed to request /RESET: %d\n", ret);
goto err_enable;
goto err_dcvdd;
}
gpio_set_value_cansleep(arizona->pdata.reset, 1);
}
if (arizona->pdata.ldoena) {
ret = gpio_request_one(arizona->pdata.ldoena,
GPIOF_DIR_OUT | GPIOF_INIT_HIGH,
"arizona LDOENA");
if (ret != 0) {
dev_err(dev, "Failed to request LDOENA: %d\n", ret);
goto err_reset;
}
}
regcache_cache_only(arizona->regmap, false);
ret = regmap_read(arizona->regmap, ARIZONA_SOFTWARE_RESET, &reg);
if (ret != 0) {
dev_err(dev, "Failed to read ID register: %d\n", ret);
goto err_ldoena;
goto err_reset;
}
ret = regmap_read(arizona->regmap, ARIZONA_DEVICE_REVISION,
&arizona->rev);
if (ret != 0) {
dev_err(dev, "Failed to read revision register: %d\n", ret);
goto err_ldoena;
goto err_reset;
}
arizona->rev &= ARIZONA_DEVICE_REVISION_MASK;
@ -374,7 +378,7 @@ int __devinit arizona_dev_init(struct arizona *arizona)
default:
dev_err(arizona->dev, "Unknown device ID %x\n", reg);
goto err_ldoena;
goto err_reset;
}
dev_info(dev, "%s revision %c\n", type_name, arizona->rev + 'A');
@ -387,7 +391,7 @@ int __devinit arizona_dev_init(struct arizona *arizona)
ret = regmap_write(arizona->regmap, ARIZONA_SOFTWARE_RESET, 0);
if (ret != 0) {
dev_err(dev, "Failed to reset device: %d\n", ret);
goto err_ldoena;
goto err_reset;
}
}
@ -424,7 +428,7 @@ int __devinit arizona_dev_init(struct arizona *arizona)
dev_err(arizona->dev, "Invalid 32kHz clock source: %d\n",
arizona->pdata.clk32k_src);
ret = -EINVAL;
goto err_ldoena;
goto err_reset;
}
for (i = 0; i < ARIZONA_MAX_INPUT; i++) {
@ -470,7 +474,7 @@ int __devinit arizona_dev_init(struct arizona *arizona)
/* Set up for interrupts */
ret = arizona_irq_init(arizona);
if (ret != 0)
goto err_ldoena;
goto err_reset;
arizona_request_irq(arizona, ARIZONA_IRQ_CLKGEN_ERR, "CLKGEN error",
arizona_clkgen_err, arizona);
@ -491,20 +495,21 @@ int __devinit arizona_dev_init(struct arizona *arizona)
goto err_irq;
}
#ifdef CONFIG_PM_RUNTIME
regulator_disable(arizona->dcvdd);
#endif
return 0;
err_irq:
arizona_irq_exit(arizona);
err_ldoena:
if (arizona->pdata.ldoena) {
gpio_set_value_cansleep(arizona->pdata.ldoena, 0);
gpio_free(arizona->pdata.ldoena);
}
err_reset:
if (arizona->pdata.reset) {
gpio_set_value_cansleep(arizona->pdata.reset, 1);
gpio_free(arizona->pdata.reset);
}
err_dcvdd:
regulator_disable(arizona->dcvdd);
err_enable:
regulator_bulk_disable(ARRAY_SIZE(arizona->core_supplies),
arizona->core_supplies);

1
include/linux/mfd/arizona/core.h
View File

@ -77,6 +77,7 @@ struct arizona {
int num_core_supplies;
struct regulator_bulk_data core_supplies[ARIZONA_MAX_CORE_SUPPLIES];
struct regulator *dcvdd;
struct arizona_pdata pdata;