Messages in this thread Patch in this message | | | From | Charles Keepax <> | Subject | [PATCH 2/2] mfd: arizona: Add DT/ACPI u32 helper functions | Date | Mon, 25 May 2015 10:28:35 +0100 |
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Add helpers to read u32's and arrays of u32's from device tree or ACPI using the new device properties API.
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> --- drivers/mfd/arizona-core.c | 39 ++++++++++++++++++++++++++++++++++++++ include/linux/mfd/arizona/core.h | 5 ++++ 2 files changed, 44 insertions(+), 0 deletions(-)
diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c index bebf58a..fb55769 100644 --- a/drivers/mfd/arizona-core.c +++ b/drivers/mfd/arizona-core.c @@ -20,6 +20,7 @@ #include <linux/of_device.h> #include <linux/of_gpio.h> #include <linux/pm_runtime.h> +#include <linux/property.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <linux/regulator/machine.h> @@ -746,6 +747,44 @@ int arizona_of_get_named_gpio(struct arizona *arizona, const char *prop, } EXPORT_SYMBOL_GPL(arizona_of_get_named_gpio); +int arizona_device_read_u32_array(struct arizona *arizona, + const char *prop, bool mandatory, + u32 *data, size_t num) +{ + int ret; + + ret = device_property_read_u32_array(arizona->dev, prop, data, num); + switch (ret) { + case 0: + break; + case -EINVAL: + if (!mandatory) + break; + + dev_err(arizona->dev, "Mandatory property %s is missing\n", + prop); + break; + default: + dev_err(arizona->dev, "Property %s is malformed: %d\n", + prop, ret); + break; + } + + return ret; +} +EXPORT_SYMBOL_GPL(arizona_device_read_u32_array); + +unsigned int arizona_device_read_u32(struct arizona *arizona, + const char *prop, bool mandatory) +{ + u32 data = 0; + + arizona_device_read_u32_array(arizona, prop, mandatory, &data, 1); + + return data; +} +EXPORT_SYMBOL_GPL(arizona_device_read_u32); + static int arizona_of_get_core_pdata(struct arizona *arizona) { struct arizona_pdata *pdata = &arizona->pdata; diff --git a/include/linux/mfd/arizona/core.h b/include/linux/mfd/arizona/core.h index 847bdaf..1c3d39d 100644 --- a/include/linux/mfd/arizona/core.h +++ b/include/linux/mfd/arizona/core.h @@ -160,5 +160,10 @@ int wm8997_patch(struct arizona *arizona); extern int arizona_of_get_named_gpio(struct arizona *arizona, const char *prop, bool mandatory); +extern int arizona_device_read_u32_array(struct arizona *arizona, + const char *prop, bool mandatory, + u32 *data, size_t num); +extern unsigned int arizona_device_read_u32(struct arizona *arizona, + const char *prop, bool mandatory); #endif -- 1.7.2.5
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