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author | Andrey Smirnov <andrew.smirnov@gmail.com> | 2016-11-07 17:53:16 +0100 |
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committer | Linus Walleij <linus.walleij@linaro.org> | 2016-11-08 09:39:06 +0100 |
commit | 0db0f26c2c5d439e07883cd8e7f22fe24e6a0101 (patch) | |
tree | 5a8e62e1dfadefc1fc74914bbcb6caae3bbb1c93 /drivers/pinctrl/pinctrl-sx150x.c | |
parent | pinctrl-sx150x: Improve sx150x_init_misc for SX1504/5/6 (diff) | |
download | linux-0db0f26c2c5d439e07883cd8e7f22fe24e6a0101.tar.xz linux-0db0f26c2c5d439e07883cd8e7f22fe24e6a0101.zip |
pinctrl-sx150x: Convert driver to use regmap API
To allow for future code simplification
Tested-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-sx150x.c')
-rw-r--r-- | drivers/pinctrl/pinctrl-sx150x.c | 102 |
1 files changed, 56 insertions, 46 deletions
diff --git a/drivers/pinctrl/pinctrl-sx150x.c b/drivers/pinctrl/pinctrl-sx150x.c index d51ec73092c2..2eb233fe218b 100644 --- a/drivers/pinctrl/pinctrl-sx150x.c +++ b/drivers/pinctrl/pinctrl-sx150x.c @@ -18,6 +18,7 @@ * GNU General Public License for more details. */ +#include <linux/regmap.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/interrupt.h> @@ -45,6 +46,7 @@ enum { }; enum { SX150X_789_REG_MISC_AUTOCLEAR_OFF = 1 << 0, + SX150X_MAX_REGISTER = 0xad, }; struct sx150x_123_pri { @@ -102,6 +104,7 @@ struct sx150x_pinctrl { struct pinctrl_desc pinctrl_desc; struct gpio_chip gpio; struct irq_chip irq_chip; + struct regmap *regmap; struct { int update; u32 sense; @@ -256,30 +259,6 @@ static const struct sx150x_device_data sx1503q_device_data = { .npins = 16, /* oscio not available */ }; -static s32 sx150x_i2c_write(struct i2c_client *client, u8 reg, u8 val) -{ - s32 err = i2c_smbus_write_byte_data(client, reg, val); - - if (err < 0) - dev_warn(&client->dev, - "i2c write fail: can't write %02x to %02x: %d\n", - val, reg, err); - return err; -} - -static s32 sx150x_i2c_read(struct i2c_client *client, u8 reg, u8 *val) -{ - s32 err = i2c_smbus_read_byte_data(client, reg); - - if (err >= 0) - *val = err; - else - dev_warn(&client->dev, - "i2c read fail: can't read from %02x: %d\n", - reg, err); - return err; -} - /* * These utility functions solve the common problem of locating and setting * configuration bits. Configuration bits are grouped into registers @@ -312,30 +291,32 @@ static int sx150x_write_cfg(struct i2c_client *client, u8 offset, u8 width, u8 reg, u8 val) { u8 mask; - u8 data; + unsigned int data; u8 shift; int err; + struct sx150x_pinctrl *pctl = i2c_get_clientdata(client); sx150x_find_cfg(offset, width, ®, &mask, &shift); - err = sx150x_i2c_read(client, reg, &data); + err = regmap_read(pctl->regmap, reg, &data); if (err < 0) return err; data &= ~mask; data |= (val << shift) & mask; - return sx150x_i2c_write(client, reg, data); + return regmap_write(pctl->regmap, reg, data); } static int sx150x_read_cfg(struct i2c_client *client, u8 offset, u8 width, u8 reg) { u8 mask; - u8 data; + unsigned int data; u8 shift; int err; + struct sx150x_pinctrl *pctl = i2c_get_clientdata(client); sx150x_find_cfg(offset, width, ®, &mask, &shift); - err = sx150x_i2c_read(client, reg, &data); + err = regmap_read(pctl->regmap, reg, &data); if (err < 0) return err; @@ -463,11 +444,10 @@ static void sx150x_gpio_set(struct gpio_chip *chip, unsigned int offset, struct sx150x_pinctrl *pctl = gpiochip_get_data(chip); if (sx150x_pin_is_oscio(pctl, offset)) { - mutex_lock(&pctl->lock); - sx150x_i2c_write(pctl->client, - pctl->data->pri.x789.reg_clock, - (value ? 0x1f : 0x10)); + regmap_write(pctl->regmap, + pctl->data->pri.x789.reg_clock, + (value ? 0x1f : 0x10)); mutex_unlock(&pctl->lock); } else { mutex_lock(&pctl->lock); @@ -567,19 +547,19 @@ static irqreturn_t sx150x_irq_thread_fn(int irq, void *dev_id) unsigned int sub_irq; unsigned int n; s32 err; - u8 val; + unsigned int val; int i; for (i = (pctl->data->ngpios / 8) - 1; i >= 0; --i) { - err = sx150x_i2c_read(pctl->client, - pctl->data->reg_irq_src - i, - &val); + err = regmap_read(pctl->regmap, + pctl->data->reg_irq_src - i, + &val); if (err < 0) continue; - err = sx150x_i2c_write(pctl->client, - pctl->data->reg_irq_src - i, - val); + err = regmap_write(pctl->regmap, + pctl->data->reg_irq_src - i, + val); if (err < 0) continue; @@ -650,15 +630,15 @@ static int sx150x_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin, u32 arg; if (sx150x_pin_is_oscio(pctl, pin)) { - u8 data; + unsigned int data; switch (param) { case PIN_CONFIG_DRIVE_PUSH_PULL: case PIN_CONFIG_OUTPUT: mutex_lock(&pctl->lock); - ret = sx150x_i2c_read(pctl->client, - pctl->data->pri.x789.reg_clock, - &data); + ret = regmap_read(pctl->regmap, + pctl->data->pri.x789.reg_clock, + &data); mutex_unlock(&pctl->lock); if (ret < 0) @@ -904,7 +884,7 @@ static int sx150x_init_io(struct sx150x_pinctrl *pctl, u8 base, u16 cfg) unsigned int n; for (n = 0; err >= 0 && n < (pctl->data->ngpios / 8); ++n) - err = sx150x_i2c_write(pctl->client, base - n, cfg >> (n * 8)); + err = regmap_write(pctl->regmap, base - n, cfg >> (n * 8)); return err; } @@ -953,7 +933,7 @@ static int sx150x_init_misc(struct sx150x_pinctrl *pctl) return -EINVAL; } - return sx150x_i2c_write(pctl->client, reg, value); + return i2c_smbus_write_byte_data(pctl->client, reg, value); } static int sx150x_init_hw(struct sx150x_pinctrl *pctl) @@ -997,6 +977,26 @@ static int sx150x_init_hw(struct sx150x_pinctrl *pctl) return 0; } +static bool sx150x_reg_volatile(struct device *dev, unsigned int reg) +{ + struct sx150x_pinctrl *pctl = i2c_get_clientdata(to_i2c_client(dev)); + + return reg == pctl->data->reg_irq_src || + reg == pctl->data->reg_irq_src - 1 || + reg == pctl->data->reg_data || + reg == pctl->data->reg_data - 1; +} + +const struct regmap_config sx150x_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .cache_type = REGCACHE_RBTREE, + + .max_register = SX150X_MAX_REGISTER, + .volatile_reg = sx150x_reg_volatile, +}; + static int sx150x_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -1013,6 +1013,8 @@ static int sx150x_probe(struct i2c_client *client, if (!pctl) return -ENOMEM; + i2c_set_clientdata(client, pctl); + pctl->dev = dev; pctl->client = client; @@ -1024,6 +1026,14 @@ static int sx150x_probe(struct i2c_client *client, if (!pctl->data) return -EINVAL; + pctl->regmap = devm_regmap_init_i2c(client, &sx150x_regmap_config); + if (IS_ERR(pctl->regmap)) { + ret = PTR_ERR(pctl->regmap); + dev_err(dev, "Failed to allocate register map: %d\n", + ret); + return ret; + } + mutex_init(&pctl->lock); ret = sx150x_init_hw(pctl); |