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firmware: raspberrypi: Introduce devm_rpi_firmware_get()

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It'll simplify the firmware handling for most consumers.

Suggested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
This commit is contained in:
Nicolas Saenz Julienne 2021-01-18 13:32:35 +01:00
parent 1e7c57355a
commit f663204c9a
2 changed files with 37 additions and 0 deletions
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29
drivers/firmware/raspberrypi.c
View file

@ -243,6 +243,13 @@ void rpi_firmware_put(struct rpi_firmware *fw)
} }
EXPORT_SYMBOL_GPL(rpi_firmware_put); EXPORT_SYMBOL_GPL(rpi_firmware_put);
static void devm_rpi_firmware_put(void *data)
{
struct rpi_firmware *fw = data;
rpi_firmware_put(fw);
}
static int rpi_firmware_probe(struct platform_device *pdev) static int rpi_firmware_probe(struct platform_device *pdev)
{ {
struct device *dev = &pdev->dev; struct device *dev = &pdev->dev;
@ -331,6 +338,28 @@ struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node)
} }
EXPORT_SYMBOL_GPL(rpi_firmware_get); EXPORT_SYMBOL_GPL(rpi_firmware_get);
/**
* devm_rpi_firmware_get - Get pointer to rpi_firmware structure.
* @firmware_node: Pointer to the firmware Device Tree node.
*
* Returns NULL is the firmware device is not ready.
*/
struct rpi_firmware *devm_rpi_firmware_get(struct device *dev,
struct device_node *firmware_node)
{
struct rpi_firmware *fw;
fw = rpi_firmware_get(firmware_node);
if (!fw)
return NULL;
if (devm_add_action_or_reset(dev, devm_rpi_firmware_put, fw))
return NULL;
return fw;
}
EXPORT_SYMBOL_GPL(devm_rpi_firmware_get);
static const struct of_device_id rpi_firmware_of_match[] = { static const struct of_device_id rpi_firmware_of_match[] = {
{ .compatible = "raspberrypi,bcm2835-firmware", }, { .compatible = "raspberrypi,bcm2835-firmware", },
{}, {},

8
include/soc/bcm2835/raspberrypi-firmware.h
View file

@ -142,6 +142,8 @@ int rpi_firmware_property_list(struct rpi_firmware *fw,
void *data, size_t tag_size); void *data, size_t tag_size);
void rpi_firmware_put(struct rpi_firmware *fw); void rpi_firmware_put(struct rpi_firmware *fw);
struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node); struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node);
struct rpi_firmware *devm_rpi_firmware_get(struct device *dev,
struct device_node *firmware_node);
#else #else
static inline int rpi_firmware_property(struct rpi_firmware *fw, u32 tag, static inline int rpi_firmware_property(struct rpi_firmware *fw, u32 tag,
void *data, size_t len) void *data, size_t len)
@ -160,6 +162,12 @@ static inline struct rpi_firmware *rpi_firmware_get(struct device_node *firmware
{ {
return NULL; return NULL;
} }
static inline struct rpi_firmware *devm_rpi_firmware_get(struct device *dev,
struct device_node *firmware_node)
{
return NULL;
}
#endif #endif
#endif /* __SOC_RASPBERRY_FIRMWARE_H__ */ #endif /* __SOC_RASPBERRY_FIRMWARE_H__ */