Use regmap instead of open-coding IO access and caching
Signed-off-by: Lars-Peter Clausen lars@metafoo.de [koike: port for upstream] Signed-off-by: Helen Koike helen.koike@collabora.co.uk --- sound/soc/codecs/tpa6130a2.c | 166 ++++++++++++------------------------------- sound/soc/codecs/tpa6130a2.h | 2 - 2 files changed, 46 insertions(+), 122 deletions(-)
diff --git a/sound/soc/codecs/tpa6130a2.c b/sound/soc/codecs/tpa6130a2.c index f700d92..0be70a4 100644 --- a/sound/soc/codecs/tpa6130a2.c +++ b/sound/soc/codecs/tpa6130a2.c @@ -32,6 +32,7 @@ #include <sound/tlv.h> #include <linux/of.h> #include <linux/of_gpio.h> +#include <linux/regmap.h>
#include "tpa6130a2.h"
@@ -45,92 +46,16 @@ static struct i2c_client *tpa6130a2_client; /* This struct is used to save the context */ struct tpa6130a2_data { struct mutex mutex; - unsigned char regs[TPA6130A2_CACHEREGNUM]; + struct regmap *regmap; struct regulator *supply; int power_gpio; u8 power_state:1; enum tpa_model id; };
-static int tpa6130a2_i2c_read(int reg) -{ - struct tpa6130a2_data *data; - int val; - - if (WARN_ON(!tpa6130a2_client)) - return -EINVAL; - data = i2c_get_clientdata(tpa6130a2_client); - - /* If powered off, return the cached value */ - if (data->power_state) { - val = i2c_smbus_read_byte_data(tpa6130a2_client, reg); - if (val < 0) - dev_err(&tpa6130a2_client->dev, "Read failed\n"); - else - data->regs[reg] = val; - } else { - val = data->regs[reg]; - } - - return val; -} - -static int tpa6130a2_i2c_write(int reg, u8 value) -{ - struct tpa6130a2_data *data; - int val = 0; - - if (WARN_ON(!tpa6130a2_client)) - return -EINVAL; - data = i2c_get_clientdata(tpa6130a2_client); - - if (data->power_state) { - val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value); - if (val < 0) { - dev_err(&tpa6130a2_client->dev, "Write failed\n"); - return val; - } - } - - /* Either powered on or off, we save the context */ - data->regs[reg] = value; - - return val; -} - -static u8 tpa6130a2_read(int reg) -{ - struct tpa6130a2_data *data; - - if (WARN_ON(!tpa6130a2_client)) - return 0; - data = i2c_get_clientdata(tpa6130a2_client); - - return data->regs[reg]; -} - -static int tpa6130a2_initialize(void) -{ - struct tpa6130a2_data *data; - int i, ret = 0; - - if (WARN_ON(!tpa6130a2_client)) - return -EINVAL; - data = i2c_get_clientdata(tpa6130a2_client); - - for (i = 1; i < TPA6130A2_REG_VERSION; i++) { - ret = tpa6130a2_i2c_write(i, data->regs[i]); - if (ret < 0) - break; - } - - return ret; -} - static int tpa6130a2_power(u8 power) { struct tpa6130a2_data *data; - u8 val; int ret = 0;
if (WARN_ON(!tpa6130a2_client)) @@ -153,7 +78,7 @@ static int tpa6130a2_power(u8 power) gpio_set_value(data->power_gpio, 1);
data->power_state = 1; - ret = tpa6130a2_initialize(); + ret = regcache_sync(data->regmap); if (ret < 0) { dev_err(&tpa6130a2_client->dev, "Failed to initialize chip\n"); @@ -165,9 +90,8 @@ static int tpa6130a2_power(u8 power) } } else { /* set SWS */ - val = tpa6130a2_read(TPA6130A2_REG_CONTROL); - val |= TPA6130A2_SWS; - tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); + regmap_update_bits(data->regmap, TPA6130A2_REG_CONTROL, + TPA6130A2_SWS, TPA6130A2_SWS);
/* Power off */ if (data->power_gpio >= 0) @@ -181,6 +105,8 @@ static int tpa6130a2_power(u8 power) }
data->power_state = 0; + /* device regs does not match the cache state anymore */ + regcache_mark_dirty(data->regmap); }
exit: @@ -196,7 +122,7 @@ static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol, struct tpa6130a2_data *data; unsigned int reg = mc->reg; unsigned int shift = mc->shift; - int max = mc->max; + int max = mc->max, val; unsigned int mask = (1 << fls(max)) - 1; unsigned int invert = mc->invert;
@@ -206,8 +132,8 @@ static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol,
mutex_lock(&data->mutex);
- ucontrol->value.integer.value[0] = - (tpa6130a2_read(reg) >> shift) & mask; + regmap_read(data->regmap, reg, &val); + ucontrol->value.integer.value[0] = (val >> shift) & mask;
if (invert) ucontrol->value.integer.value[0] = @@ -229,7 +155,7 @@ static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol, unsigned int mask = (1 << fls(max)) - 1; unsigned int invert = mc->invert; unsigned int val = (ucontrol->value.integer.value[0] & mask); - unsigned int val_reg; + bool change;
if (WARN_ON(!tpa6130a2_client)) return -EINVAL; @@ -239,20 +165,11 @@ static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol, val = max - val;
mutex_lock(&data->mutex); - - val_reg = tpa6130a2_read(reg); - if (((val_reg >> shift) & mask) == val) { - mutex_unlock(&data->mutex); - return 0; - } - - val_reg &= ~(mask << shift); - val_reg |= val << shift; - tpa6130a2_i2c_write(reg, val_reg); - + regmap_update_bits_check(data->regmap, reg, mask << shift, val << shift, + &change); mutex_unlock(&data->mutex);
- return 1; + return change; }
/* @@ -301,31 +218,26 @@ static const struct snd_kcontrol_new tpa6140a2_controls[] = { */ static void tpa6130a2_channel_enable(u8 channel, int enable) { - u8 val; + struct tpa6130a2_data *data = i2c_get_clientdata(tpa6130a2_client);
if (enable) { /* Enable channel */ /* Enable amplifier */ - val = tpa6130a2_read(TPA6130A2_REG_CONTROL); - val |= channel; - val &= ~TPA6130A2_SWS; - tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); + regmap_update_bits(data->regmap, TPA6130A2_REG_CONTROL, + channel | TPA6130A2_SWS, channel & ~TPA6130A2_SWS);
/* Unmute channel */ - val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE); - val &= ~channel; - tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val); + regmap_update_bits(data->regmap, TPA6130A2_REG_VOL_MUTE, + channel, 0); } else { /* Disable channel */ /* Mute channel */ - val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE); - val |= channel; - tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val); + regmap_update_bits(data->regmap, TPA6130A2_REG_VOL_MUTE, + channel, channel);
/* Disable amplifier */ - val = tpa6130a2_read(TPA6130A2_REG_CONTROL); - val &= ~channel; - tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); + regmap_update_bits(data->regmap, TPA6130A2_REG_CONTROL, + channel, 0); } }
@@ -365,6 +277,20 @@ struct snd_soc_component_driver tpa6130a2_component_driver = { .probe = tpa6130a2_component_probe, };
+static const struct reg_default tpa6130a2_reg_defaults[] = { + { TPA6130A2_REG_CONTROL, TPA6130A2_SWS }, + { TPA6130A2_REG_VOL_MUTE, TPA6130A2_MUTE_R | TPA6130A2_MUTE_L }, +}; + +static const struct regmap_config tpa6130a2_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = TPA6130A2_REG_VERSION, + .reg_defaults = tpa6130a2_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(tpa6130a2_reg_defaults), + .cache_type = REGCACHE_RBTREE, +}; + static int tpa6130a2_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -373,6 +299,7 @@ static int tpa6130a2_probe(struct i2c_client *client, struct tpa6130a2_platform_data *pdata = client->dev.platform_data; struct device_node *np = client->dev.of_node; const char *regulator; + unsigned int version; int ret;
dev = &client->dev; @@ -381,6 +308,10 @@ static int tpa6130a2_probe(struct i2c_client *client, if (!data) return -ENOMEM;
+ data->regmap = devm_regmap_init_i2c(client, &tpa6130a2_regmap_config); + if (IS_ERR(data->regmap)) + return PTR_ERR(data->regmap); + if (pdata) { data->power_gpio = pdata->power_gpio; } else if (np) { @@ -399,11 +330,6 @@ static int tpa6130a2_probe(struct i2c_client *client,
mutex_init(&data->mutex);
- /* Set default register values */ - data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS; - data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R | - TPA6130A2_MUTE_L; - if (data->power_gpio >= 0) { ret = devm_gpio_request(dev, data->power_gpio, "tpa6130a2 enable"); @@ -440,10 +366,10 @@ static int tpa6130a2_probe(struct i2c_client *client,
/* Read version */ - ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) & - TPA6130A2_VERSION_MASK; - if ((ret != 1) && (ret != 2)) - dev_warn(dev, "UNTESTED version detected (%d)\n", ret); + regmap_read(data->regmap, TPA6130A2_REG_VERSION, &version); + version &= TPA6130A2_VERSION_MASK; + if ((version != 1) && (version != 2)) + dev_warn(dev, "UNTESTED version detected (%d)\n", version);
/* Disable the chip */ ret = tpa6130a2_power(0); diff --git a/sound/soc/codecs/tpa6130a2.h b/sound/soc/codecs/tpa6130a2.h index 78ee723..ef05a3f 100644 --- a/sound/soc/codecs/tpa6130a2.h +++ b/sound/soc/codecs/tpa6130a2.h @@ -30,8 +30,6 @@ #define TPA6130A2_REG_OUT_IMPEDANCE 0x03 #define TPA6130A2_REG_VERSION 0x04
-#define TPA6130A2_CACHEREGNUM (TPA6130A2_REG_VERSION + 1) - /* Register bits */ /* TPA6130A2_REG_CONTROL (0x01) */ #define TPA6130A2_SWS (0x01 << 0)