This patch adds device tree support for the CS42L52 Codec

v3 Adds better descriptors for platform data. Change mic differential setting to boolean Change chgfreq to chgfreq-divisor Add vendor cirrus to of properties

Signed-off-by: Brian Austin brian.austin@cirrus.com --- sound/soc/codecs/cs42l52.c | 45 ++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 42 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/cs42l52.c b/sound/soc/codecs/cs42l52.c index e68450e..ed3c20f 100644 --- a/sound/soc/codecs/cs42l52.c +++ b/sound/soc/codecs/cs42l52.c @@ -17,7 +17,7 @@ #include <linux/kernel.h> #include <linux/init.h> #include <linux/delay.h> -#include <linux/gpio.h> +#include <linux/of_gpio.h> #include <linux/pm.h> #include <linux/i2c.h> #include <linux/input.h> @@ -1193,6 +1193,7 @@ static int cs42l52_i2c_probe(struct i2c_client *i2c_client, int ret; unsigned int devid = 0; unsigned int reg; + u32 val32;

cs42l52 = devm_kzalloc(&i2c_client->dev, sizeof(struct cs42l52_private), GFP_KERNEL); @@ -1206,9 +1207,39 @@ static int cs42l52_i2c_probe(struct i2c_client *i2c_client, dev_err(&i2c_client->dev, "regmap_init() failed: %d\n", ret); return ret; } - - if (pdata) + if (pdata) { + cs42l52->pdata = *pdata; + } else { + pdata = devm_kzalloc(&i2c_client->dev, + sizeof(struct cs42l52_platform_data), + GFP_KERNEL); + if (!pdata) { + dev_err(&i2c_client->dev, "could not allocate pdata\n"); + return -ENOMEM; + } + if (i2c_client->dev.of_node) { + if (of_property_read_bool(i2c_client->dev.of_node, + "cirrus,mica-differential-cfg")) + pdata->mica_diff_cfg = true; + + if (of_property_read_bool(i2c_client->dev.of_node, + "cirrus,micb-differential-cfg")) + pdata->micb_diff_cfg = true; + + if (of_property_read_u32(i2c_client->dev.of_node, + "cirrus,micbias-lvl", &val32) >= 0) + pdata->micbias_lvl = val32; + + if (of_property_read_u32(i2c_client->dev.of_node, + "cirrus,chgfreq-divisor", &val32) >= 0) + pdata->chgfreq_divisor = val32; + + pdata->reset_gpio = + of_get_named_gpio(i2c_client->dev.of_node, + "cirrus,reset-gpio", 0); + } cs42l52->pdata = *pdata; + }

if (cs42l52->pdata.reset_gpio) { ret = gpio_request_one(cs42l52->pdata.reset_gpio, @@ -1280,6 +1311,13 @@ static int cs42l52_i2c_remove(struct i2c_client *client) return 0; }

+static const struct of_device_id cs42l52_of_match[] = { + { .compatible = "cirrus,cs42l52", }, + {}, +}; +MODULE_DEVICE_TABLE(of, cs42l52_of_match); + + static const struct i2c_device_id cs42l52_id[] = { { "cs42l52", 0 }, { } @@ -1290,6 +1328,7 @@ static struct i2c_driver cs42l52_i2c_driver = { .driver = { .name = "cs42l52", .owner = THIS_MODULE, + .of_match_table = cs42l52_of_match, }, .id_table = cs42l52_id, .probe = cs42l52_i2c_probe,