ich777/linux_media
1
0
Fork 0
mirror of https://github.com/tbsdtv/linux_media.git synced 2025-07-24 05:01:03 +02:00
Code Issues Packages Projects Releases Wiki Activity

regmap: Support accelerated noinc operations

Browse Source 
Several architectures have accelerated operations for MMIO
operations writing to a single register, such as writesb, writesw,
writesl, writesq, readsb, readsw, readsl and readsq but regmap
currently cannot use them because we have no hooks for providing
an accelerated noinc back-end for MMIO.

Solve this by providing reg_[read/write]_noinc callbacks for
the bus abstraction, so that the regmap-mmio bus can use this.

Currently I do not see a need to support this for custom regmaps
so it is only added to the bus.

Callbacks are passed a void * with the array of values and a
count which is the number of items of the byte chunk size for
the specific register width.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220816204832.265837-1-linus.walleij@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Linus Walleij
2022-08-16 22:48:31 +02:00
committed by Mark Brown
parent 77672e0387
commit c20cc099b3
2 changed files with 128 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
include/linux/regmap.h
View File

@@ -492,8 +492,12 @@ typedef int (*regmap_hw_read)(void *context,
void *val_buf, size_t val_size);
typedef int (*regmap_hw_reg_read)(void *context, unsigned int reg,
unsigned int *val);
typedef int (*regmap_hw_reg_noinc_read)(void *context, unsigned int reg,
void *val, size_t val_count);
typedef int (*regmap_hw_reg_write)(void *context, unsigned int reg,
unsigned int val);
typedef int (*regmap_hw_reg_noinc_write)(void *context, unsigned int reg,
const void *val, size_t val_count);
typedef int (*regmap_hw_reg_update_bits)(void *context, unsigned int reg,
unsigned int mask, unsigned int val);
typedef struct regmap_async *(*regmap_hw_async_alloc)(void);
@@ -514,6 +518,8 @@ typedef void (*regmap_hw_free_context)(void *context);
* must serialise with respect to non-async I/O.
* @reg_write: Write a single register value to the given register address. This
* write operation has to complete when returning from the function.
* @reg_write_noinc: Write multiple register value to the same register. This
* write operation has to complete when returning from the function.
* @reg_update_bits: Update bits operation to be used against volatile
* registers, intended for devices supporting some mechanism
* for setting clearing bits without having to
@@ -541,9 +547,11 @@ struct regmap_bus {
regmap_hw_gather_write gather_write;
regmap_hw_async_write async_write;
regmap_hw_reg_write reg_write;
regmap_hw_reg_noinc_write reg_noinc_write;
regmap_hw_reg_update_bits reg_update_bits;
regmap_hw_read read;
regmap_hw_reg_read reg_read;
regmap_hw_reg_noinc_read reg_noinc_read;
regmap_hw_free_context free_context;
regmap_hw_async_alloc async_alloc;
u8 read_flag_mask;