kernel/linux.git/include/linux/regmap.h, branch v6.12.80

regmap: Allow setting IRQ domain name suffix

2024-08-13T11:45:01+00:00

When multiple IRQ domains are created from the same device-tree node they will get the same name based on the device-tree path. This will cause a naming collision in debugFS when IRQ domain specific entries are created. The regmap-IRQ creates per instance IRQ domains. This will lead to a domain name conflict when a device which provides more than one interrupt line uses the regmap-IRQ. Add support for specifying an IRQ domain name suffix when creating a regmap-IRQ controller. Signed-off-by: Matti Vaittinen Link: https://patch.msgid.link/776bc4996969e5081bcf61b9bdb5517e537147a3.1723120028.git.mazziesaccount@gmail.com Signed-off-by: Mark Brown

regmap: Implement regmap_multi_reg_read()

2024-07-10T22:05:45+00:00

Merge series from Guenter Roeck : regmap_multi_reg_read() is similar to regmap_bilk_read() but reads from an array of non-sequential registers. It is helpful if multiple non- sequential registers need to be read in a single operation which would otherwise have to be mutex protected. The name of the new function was chosen to match the existing function regmap_multi_reg_write().

regmap: Implement regmap_multi_reg_read()

2024-07-10T17:45:34+00:00

regmap_multi_reg_read() is similar to regmap_bilk_read() but reads from an array of non-sequential registers. Signed-off-by: Guenter Roeck Link: https://lore.kernel.org/r/20240710015622.1960522-2-linux@roeck-us.net Signed-off-by: Mark Brown

regmap-irq: handle const struct regmap_irq_sub_irq_map

2024-07-08T11:50:16+00:00

The struct instances supplied by the drivers are never modified. Handle them as const in the regmap core allowing the drivers to put them into .rodata. Also add a new entry to const_structs.checkpatch to make sure future instances of this struct already enter the tree as const. Signed-off-by: Thomas Weißschuh Link: https://patch.msgid.link/20240706-regmap-const-structs-v1-2-d08c776da787@weissschuh.net Signed-off-by: Mark Brown

regmap: Reorder fields in 'struct regmap_config' to save some memory

2024-05-07T01:31:42+00:00

On x86_64 and allmodconfig, this shrinks the size of 'struct regmap_config' from 328 to 312 bytes. This is usually a win, because this structure is used as a static global variable. When moving the kerneldoc fields, I've tried to keep the layout as consistent as possible, which is not really easy! Before: /* size: 328, cachelines: 6, members: 55 */ /* sum members: 296, holes: 6, sum holes: 25 */ /* padding: 7 */ /* last cacheline: 8 bytes */ After: /* size: 312, cachelines: 5, members: 55 */ /* sum members: 296, holes: 5, sum holes: 16 */ /* last cacheline: 56 bytes */ For the records, this is also widely used: $git grep static.*regmap_config | wc -l 1327 Signed-off-by: Christophe JAILLET Link: https://lore.kernel.org/r/5e039cd8fe415dd7ab3169948c08a5311db9fb9a.1715024007.git.christophe.jaillet@wanadoo.fr Signed-off-by: Mark Brown

regmap: Add regmap_read_bypassed()

2024-04-08T13:09:58+00:00

Add a regmap_read_bypassed() to allow reads from the hardware registers while the regmap is in cache-only mode. A typical use for this is to keep the cache in cache-only mode until the hardware has reached a valid state, but one or more status registers must be polled to determine when this state is reached. For example, firmware download on the cs35l56 can take several seconds if there are multiple amps sharing limited bus bandwidth. This is too long to block in probe() so it is done as a background task. The device must be soft-reset to reboot the firmware and during this time the registers are not accessible, so the cache should be in cache-only. But the driver must poll a register to detect when reboot has completed. Signed-off-by: Richard Fitzgerald Fixes: 8a731fd37f8b ("ASoC: cs35l56: Move utility functions to shared file") Link: https://msgid.link/r/20240408101803.43183-2-rf@opensource.cirrus.com Signed-off-by: Mark Brown

regmap: rework ->max_register handling

2024-02-05T14:32:35+00:00

When regmap consists of single register, 'regmap' subsystem is unable to understand whether ->max_register is set or not, because in both cases it is equal to zero. It leads to that the logic based on value of ->max_register doesn't work. For example using of REGCACHE_FLAT fails. This patch introduces an extra parameter to regmap config, indicating that zero value in ->max_register is authentic. Signed-off-by: Jan Dakinevich Link: https://lore.kernel.org/r/20240126200836.1829995-1-jan.dakinevich@salutedevices.com Signed-off-by: Mark Brown

regmap: Let users check if a register is cached

2023-07-18T14:05:10+00:00

The HDA driver has a use case for checking if a register is cached which it bodges in awkwardly and unclearly. Provide an API which allows it to directly do what it's trying to do. Reviewed-by: Takashi Iwai Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20230717-regmap-cache-check-v1-1-73ef688afae3@kernel.org Signed-off-by: Mark Brown

regmap-irq: Remove support for not_fixed_stride

2023-05-12T01:28:01+00:00

No remaining users, use a custom .get_irq_reg() callback instead. Signed-off-by: Aidan MacDonald

regmap-irq: Remove type registers

2023-05-12T01:28:01+00:00

No remaining users, these have been replaced by config registers. Signed-off-by: Aidan MacDonald