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regmap: sdw: Remove 8-bit value size restriction

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Some SoundWire devices have larger width device specific register
maps, in addition to the standard SoundWire 8-bit map. Update the
helpers to allow accessing arbitrarily sized register values and remove
the explicit 8-bit restriction from regmap_sdw_config_check.

Signed-off-by: Lucas Tanure <tanureal@opensource.cirrus.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230112171840.2098463-3-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Lucas Tanure 2023-01-12 17:18:40 +00:00 committed by Mark Brown
parent 6466b376e9
commit 522272047d
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GPG Key ID: 24D68B725D5487D0
1 changed files with 24 additions and 15 deletions
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39
drivers/base/regmap/regmap-sdw.c
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@ -6,43 +6,52 @@
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/soundwire/sdw.h>
#include <linux/types.h>
#include "internal.h"
static int regmap_sdw_write(void *context, unsigned int reg, unsigned int val)
static int regmap_sdw_write(void *context, const void *val_buf, size_t val_size)
{
struct device *dev = context;
struct sdw_slave *slave = dev_to_sdw_dev(dev);
/* First word of buffer contains the destination address */
u32 addr = le32_to_cpu(*(const __le32 *)val_buf);
const u8 *val = val_buf;
return sdw_write_no_pm(slave, reg, val);
return sdw_nwrite_no_pm(slave, addr, val_size - sizeof(addr), val + sizeof(addr));
}
static int regmap_sdw_read(void *context, unsigned int reg, unsigned int *val)
static int regmap_sdw_gather_write(void *context,
const void *reg_buf, size_t reg_size,
const void *val_buf, size_t val_size)
{
struct device *dev = context;
struct sdw_slave *slave = dev_to_sdw_dev(dev);
int read;
u32 addr = le32_to_cpu(*(const __le32 *)reg_buf);
read = sdw_read_no_pm(slave, reg);
if (read < 0)
return read;
return sdw_nwrite_no_pm(slave, addr, val_size, val_buf);
}
*val = read;
return 0;
static int regmap_sdw_read(void *context,
const void *reg_buf, size_t reg_size,
void *val_buf, size_t val_size)
{
struct device *dev = context;
struct sdw_slave *slave = dev_to_sdw_dev(dev);
u32 addr = le32_to_cpu(*(const __le32 *)reg_buf);
return sdw_nread_no_pm(slave, addr, val_size, val_buf);
}
static const struct regmap_bus regmap_sdw = {
.reg_read = regmap_sdw_read,
.reg_write = regmap_sdw_write,
.write = regmap_sdw_write,
.gather_write = regmap_sdw_gather_write,
.read = regmap_sdw_read,
.reg_format_endian_default = REGMAP_ENDIAN_LITTLE,
.val_format_endian_default = REGMAP_ENDIAN_LITTLE,
};
static int regmap_sdw_config_check(const struct regmap_config *config)
{
/* All register are 8-bits wide as per MIPI Soundwire 1.0 Spec */
if (config->val_bits != 8)
return -ENOTSUPP;
/* Register addresses are 32 bits wide */
if (config->reg_bits != 32)
return -ENOTSUPP;