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ASoC: nau8325: Add software reset during probe

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Currently, the driver only performs a hardware reset during the I2C probe
sequence. To ensure all internal states of the codec are properly cleared
without affecting the configuration registers, a software reset is also
required.

According to the hardware specification, writing to the Software Reset
register (R01) twice will reset all internal states safely.

This patch adds the nau8325_software_reset() function, executes it right
after the hardware reset in the probe function, and marks the R01 register
as writeable in the regmap configuration.

Signed-off-by: Neo Chang <YLCHANG2@nuvoton.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/20260408052639.187149-1-YLCHANG2@nuvoton.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Neo Chang
2026-04-08 13:26:39 +08:00
committed by Mark Brown
parent c5408d8183
commit f4c90fb761
1 changed files with 8 additions and 1 deletions
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9
sound/soc/codecs/nau8325.c
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@@ -142,7 +142,7 @@ static bool nau8325_readable_reg(struct device *dev, unsigned int reg)
static bool nau8325_writeable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case NAU8325_R00_HARDWARE_RST:
case NAU8325_R00_HARDWARE_RST ... NAU8325_R01_SOFTWARE_RST:
case NAU8325_R03_CLK_CTRL ... NAU8325_R06_INT_CLR_STATUS:
case NAU8325_R09_IRQOUT ... NAU8325_R13_DAC_VOLUME:
case NAU8325_R29_DAC_CTRL1 ... NAU8325_R2A_DAC_CTRL2:
@@ -670,6 +670,12 @@ static void nau8325_reset_chip(struct regmap *regmap)
regmap_write(regmap, NAU8325_R00_HARDWARE_RST, 0x0000);
}
static void nau8325_software_reset(struct regmap *regmap)
{
regmap_write(regmap, NAU8325_R01_SOFTWARE_RST, 0x0000);
regmap_write(regmap, NAU8325_R01_SOFTWARE_RST, 0x0000);
}
static void nau8325_init_regs(struct nau8325 *nau8325)
{
struct regmap *regmap = nau8325->regmap;
@@ -856,6 +862,7 @@ static int nau8325_i2c_probe(struct i2c_client *i2c)
nau8325_print_device_properties(nau8325);
nau8325_reset_chip(nau8325->regmap);
nau8325_software_reset(nau8325->regmap);
ret = regmap_read(nau8325->regmap, NAU8325_R02_DEVICE_ID, &value);
if (ret) {
dev_dbg(dev, "Failed to read device id (%d)", ret);