kernel/linux.git/drivers/power/reset/at91-reset.c, branch v6.7

power: reset: at91-reset: add sysfs interface to the power on reason

2023-07-19T21:15:21+00:00

Introduce a list of generic reset sources and use them to export the power on reason through sysfs. Update the ABI documentation to describe this new interface. Signed-off-by: Kamel Bouhara Acked-by: Nicolas Ferre [Miquel Raynal: Follow-up on Kamel's work, 4 years later] Signed-off-by: Miquel Raynal Signed-off-by: Sebastian Reichel

power: reset: at91-reset: change the power on reason prototype

2023-06-19T21:33:14+00:00

It is quite uncommon to use a driver helper with parameters like *pdev and __iomem *base. It is much cleaner and close to today's standards to provide the per-device driver structure and then access its internals. Let's do this with the helper which returns the power on reason. While we change the parameters, we can as well rename the function from at91_reset_status() to at91_reset_reason() to be more accurate with what the helper actually does, and finally because we don't really need the pdev argument in this helper besides for printing the reset reason, we can move the dev_info() call into the probe. All these modifications prepare the introduction of a sysfs entry to access this information. This way the diff will be much smaller. Thus, there is no intended functional change. Signed-off-by: Miquel Raynal Acked-by: Nicolas Ferre Signed-off-by: Sebastian Reichel

power: reset: at91-reset: add support for SAMA7G5

2022-06-17T15:20:00+00:00

Add support for SAMA7G5 including reset_controller_dev support for 3 lines (which are USB PHYs). Signed-off-by: Claudiu Beznea Signed-off-by: Sebastian Reichel

power: reset: at91-reset: add reset_controller_dev support

2022-06-17T15:20:00+00:00

SAMA7G5 reset controller has 5 extra lines that goes to different devices (3 lines to USB PHYs, 1 line to DDR controller, 1 line to DDR PHY controller). These reset lines could be requested by different controller drivers (e.g. USB PHY driver) and these controllers' drivers could assert/deassert these lines when necessary. Thus add support for reset_controller_dev which brings this functionality. Signed-off-by: Claudiu Beznea Reviewed-by: Philipp Zabel Signed-off-by: Sebastian Reichel

power: reset: at91-reset: add at91_reset_data

2022-06-17T15:20:00+00:00

Add struct at91_reset_data to keep per platform related information. This is a prerequisite for adding reset_controller_dev support. Signed-off-by: Claudiu Beznea Signed-off-by: Sebastian Reichel

power: reset: at91-reset: document structures and enums

2022-06-17T15:20:00+00:00

Document structures and enums. Signed-off-by: Claudiu Beznea Signed-off-by: Sebastian Reichel

power: reset: at91-reset: check properly the return value of devm_of_iomap

2021-10-02T15:40:34+00:00

devm_of_iomap() returns error code or valid pointer. Check its return value with IS_ERR(). Fixes: bd3127733f2c ("power: reset: at91-reset: use devm_of_iomap") Reported-by: Cristian Birsan Signed-off-by: Claudiu Beznea Signed-off-by: Sebastian Reichel

power: reset: at91-reset: use devm_of_iomap

2021-04-02T11:11:45+00:00

Use devm_of_iomap() to map resources. This will avoid the necessity to track the mapped resources and free them on failure path or on remove. Reported-by: kernel test robot Reported-by: Dan Carpenter Suggested-by: Nicolas Ferre Signed-off-by: Claudiu Beznea Signed-off-by: Sebastian Reichel

power: reset: at91-reset: handle nrst async for sam9x60

2020-03-08T18:38:04+00:00

Handle NRST asynchronously for SAM9X60 to avoid problem with fast drop of VDDCORE on shutdown operations in the first 100 us after CPU is shutdown. Signed-off-by: Claudiu Beznea Signed-off-by: Sebastian Reichel

power: reset: at91-reset: get rid of at91_reset_data

2020-03-08T18:38:04+00:00

After refactoring struct at91_reset_data and struct at91_reset_data at91sam9260_reset_data are not needed anymore. Signed-off-by: Claudiu Beznea Signed-off-by: Sebastian Reichel