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firmware: raspberrypi: Introduce devm_rpi_firmware_get()

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[ Upstream commit f663204c9a ]

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>
Stable-dep-of: 5bca3688bd ("Input: raspberrypi-ts - fix refcount leak in rpi_ts_probe")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Nicolas Saenz Julienne 2021-01-18 13:32:35 +01:00 committed by Greg Kroah-Hartman
parent d537afa08e
commit de85be00a8
2 changed files with 37 additions and 0 deletions
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29
drivers/firmware/raspberrypi.c
View file

@ -232,6 +232,13 @@ void rpi_firmware_put(struct rpi_firmware *fw)
}
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)
{
struct device *dev = &pdev->dev;
@ -320,6 +327,28 @@ struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node)
}
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[] = {
{ .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 rpi_firmware_put(struct rpi_firmware *fw);
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
static inline int rpi_firmware_property(struct rpi_firmware *fw, u32 tag,
void *data, size_t len)
@ -160,6 +162,12 @@ static inline struct rpi_firmware *rpi_firmware_get(struct device_node *firmware
{
return NULL;
}
static inline struct rpi_firmware *devm_rpi_firmware_get(struct device *dev,
struct device_node *firmware_node)
{
return NULL;
}
#endif
#endif /* __SOC_RASPBERRY_FIRMWARE_H__ */