diff options
| author | Neo Chang <YLCHANG2@nuvoton.com> | 2026-04-08 13:26:39 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2026-04-08 13:01:06 +0100 |
| commit | f4c90fb761f696ebbcf1e8fb7f83d83cbb30cb0c (patch) | |
| tree | 695677571c715117e86e8c81a7a0ae97bc622323 | |
| parent | c5408d818316061d6063c11a4f47f1ba25a3a708 (diff) | |
ASoC: nau8325: Add software reset during probe
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>
| -rw-r--r-- | sound/soc/codecs/nau8325.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/sound/soc/codecs/nau8325.c b/sound/soc/codecs/nau8325.c index e651263a9812..58ef5c493835 100644 --- a/sound/soc/codecs/nau8325.c +++ b/sound/soc/codecs/nau8325.c @@ -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); |