From: Dmitry Torokhov Date: Fri, 17 Feb 2017 07:22:38 +0000 (-0800) Subject: Input: ad7879 - convert to use regmap X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=404a24c35db8c44dce91010023f12b73f2f44441;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git Input: ad7879 - convert to use regmap Instead of rolling our own infrastructure to provide uniform access to I2C and SPI buses, let's switch to using regmap. Reviewed-by: Michael Hennerich Tested-by: Michael Hennerich Signed-off-by: Dmitry Torokhov --- diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index 033599777651..574400ba1cb6 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -73,6 +73,7 @@ config TOUCHSCREEN_AD7879 config TOUCHSCREEN_AD7879_I2C tristate "support I2C bus connection" depends on TOUCHSCREEN_AD7879 && I2C + select REGMAP_I2C help Say Y here if you have AD7879-1/AD7889-1 hooked to an I2C bus. @@ -82,6 +83,7 @@ config TOUCHSCREEN_AD7879_I2C config TOUCHSCREEN_AD7879_SPI tristate "support SPI bus connection" depends on TOUCHSCREEN_AD7879 && SPI_MASTER + select REGMAP_SPI help Say Y here if you have AD7879-1/AD7889-1 hooked to a SPI bus. diff --git a/drivers/input/touchscreen/ad7879-i2c.c b/drivers/input/touchscreen/ad7879-i2c.c index 58f72e0246ab..25aa9b89a6aa 100644 --- a/drivers/input/touchscreen/ad7879-i2c.c +++ b/drivers/input/touchscreen/ad7879-i2c.c @@ -12,53 +12,23 @@ #include #include #include +#include #include "ad7879.h" #define AD7879_DEVID 0x79 /* AD7879-1/AD7889-1 */ -/* All registers are word-sized. - * AD7879 uses a high-byte first convention. - */ -static int ad7879_i2c_read(struct device *dev, u8 reg) -{ - struct i2c_client *client = to_i2c_client(dev); - - return i2c_smbus_read_word_swapped(client, reg); -} - -static int ad7879_i2c_multi_read(struct device *dev, - u8 first_reg, u8 count, u16 *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - u8 idx; - - i2c_smbus_read_i2c_block_data(client, first_reg, count * 2, (u8 *)buf); - - for (idx = 0; idx < count; ++idx) - buf[idx] = swab16(buf[idx]); - - return 0; -} - -static int ad7879_i2c_write(struct device *dev, u8 reg, u16 val) -{ - struct i2c_client *client = to_i2c_client(dev); - - return i2c_smbus_write_word_swapped(client, reg, val); -} - -static const struct ad7879_bus_ops ad7879_i2c_bus_ops = { - .bustype = BUS_I2C, - .read = ad7879_i2c_read, - .multi_read = ad7879_i2c_multi_read, - .write = ad7879_i2c_write, +static const struct regmap_config ad7879_i2c_regmap_config = { + .reg_bits = 8, + .val_bits = 16, + .max_register = 15, }; static int ad7879_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct ad7879 *ts; + struct regmap *regmap; if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA)) { @@ -66,8 +36,12 @@ static int ad7879_i2c_probe(struct i2c_client *client, return -EIO; } - ts = ad7879_probe(&client->dev, AD7879_DEVID, client->irq, - &ad7879_i2c_bus_ops); + regmap = devm_regmap_init_i2c(client, &ad7879_i2c_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + ts = ad7879_probe(&client->dev, regmap, client->irq, + BUS_I2C, AD7879_DEVID); if (IS_ERR(ts)) return PTR_ERR(ts); diff --git a/drivers/input/touchscreen/ad7879-spi.c b/drivers/input/touchscreen/ad7879-spi.c index d42b6b9af191..8fb8ccdfac6a 100644 --- a/drivers/input/touchscreen/ad7879-spi.c +++ b/drivers/input/touchscreen/ad7879-spi.c @@ -11,109 +11,29 @@ #include #include #include +#include #include "ad7879.h" #define AD7879_DEVID 0x7A /* AD7879/AD7889 */ #define MAX_SPI_FREQ_HZ 5000000 -#define AD7879_CMD_MAGIC 0xE000 -#define AD7879_CMD_READ (1 << 10) -#define AD7879_CMD(reg) (AD7879_CMD_MAGIC | ((reg) & 0xF)) -#define AD7879_WRITECMD(reg) (AD7879_CMD(reg)) -#define AD7879_READCMD(reg) (AD7879_CMD(reg) | AD7879_CMD_READ) -/* - * ad7879_read/write are only used for initial setup and for sysfs controls. - * The main traffic is done in ad7879_collect(). - */ - -static int ad7879_spi_xfer(struct spi_device *spi, - u16 cmd, u8 count, u16 *tx_buf, u16 *rx_buf) -{ - struct spi_message msg; - struct spi_transfer *xfers; - void *spi_data; - u16 *command; - u16 *_rx_buf = _rx_buf; /* shut gcc up */ - u8 idx; - int ret; - - xfers = spi_data = kzalloc(sizeof(*xfers) * (count + 2), GFP_KERNEL); - if (!spi_data) - return -ENOMEM; - - spi_message_init(&msg); - - command = spi_data; - command[0] = cmd; - if (count == 1) { - /* ad7879_spi_{read,write} gave us buf on stack */ - command[1] = *tx_buf; - tx_buf = &command[1]; - _rx_buf = rx_buf; - rx_buf = &command[2]; - } - - ++xfers; - xfers[0].tx_buf = command; - xfers[0].len = 2; - spi_message_add_tail(&xfers[0], &msg); - ++xfers; - - for (idx = 0; idx < count; ++idx) { - if (rx_buf) - xfers[idx].rx_buf = &rx_buf[idx]; - if (tx_buf) - xfers[idx].tx_buf = &tx_buf[idx]; - xfers[idx].len = 2; - spi_message_add_tail(&xfers[idx], &msg); - } +#define AD7879_CMD_MAGIC 0xE0 +#define AD7879_CMD_READ BIT(2) - ret = spi_sync(spi, &msg); - - if (count == 1) - _rx_buf[0] = command[2]; - - kfree(spi_data); - - return ret; -} - -static int ad7879_spi_multi_read(struct device *dev, - u8 first_reg, u8 count, u16 *buf) -{ - struct spi_device *spi = to_spi_device(dev); - - return ad7879_spi_xfer(spi, AD7879_READCMD(first_reg), count, NULL, buf); -} - -static int ad7879_spi_read(struct device *dev, u8 reg) -{ - struct spi_device *spi = to_spi_device(dev); - u16 ret, dummy; - - return ad7879_spi_xfer(spi, AD7879_READCMD(reg), 1, &dummy, &ret) ? : ret; -} - -static int ad7879_spi_write(struct device *dev, u8 reg, u16 val) -{ - struct spi_device *spi = to_spi_device(dev); - u16 dummy; - - return ad7879_spi_xfer(spi, AD7879_WRITECMD(reg), 1, &val, &dummy); -} - -static const struct ad7879_bus_ops ad7879_spi_bus_ops = { - .bustype = BUS_SPI, - .read = ad7879_spi_read, - .multi_read = ad7879_spi_multi_read, - .write = ad7879_spi_write, +static const struct regmap_config ad7879_spi_regmap_config = { + .reg_bits = 16, + .val_bits = 16, + .max_register = 15, + .read_flag_mask = AD7879_CMD_MAGIC | AD7879_CMD_READ, + .write_flag_mask = AD7879_CMD_MAGIC, }; static int ad7879_spi_probe(struct spi_device *spi) { struct ad7879 *ts; + struct regmap *regmap; int err; /* don't exceed max specified SPI CLK frequency */ @@ -125,11 +45,15 @@ static int ad7879_spi_probe(struct spi_device *spi) spi->bits_per_word = 16; err = spi_setup(spi); if (err) { - dev_dbg(&spi->dev, "spi master doesn't support 16 bits/word\n"); - return err; + dev_dbg(&spi->dev, "spi master doesn't support 16 bits/word\n"); + return err; } - ts = ad7879_probe(&spi->dev, AD7879_DEVID, spi->irq, &ad7879_spi_bus_ops); + regmap = devm_regmap_init_spi(spi, &ad7879_spi_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + ts = ad7879_probe(&spi->dev, regmap, spi->irq, BUS_SPI, AD7879_DEVID); if (IS_ERR(ts)) return PTR_ERR(ts); diff --git a/drivers/input/touchscreen/ad7879.c b/drivers/input/touchscreen/ad7879.c index e16a44667da7..6465db7a1b20 100644 --- a/drivers/input/touchscreen/ad7879.c +++ b/drivers/input/touchscreen/ad7879.c @@ -26,9 +26,8 @@ #include #include #include +#include #include -#include -#include #include #include @@ -106,8 +105,7 @@ enum { #define TS_PEN_UP_TIMEOUT msecs_to_jiffies(50) struct ad7879 { - const struct ad7879_bus_ops *bops; - + struct regmap *regmap; struct device *dev; struct input_dev *input; struct timer_list timer; @@ -137,17 +135,32 @@ struct ad7879 { static int ad7879_read(struct ad7879 *ts, u8 reg) { - return ts->bops->read(ts->dev, reg); -} + unsigned int val; + int error; -static int ad7879_multi_read(struct ad7879 *ts, u8 first_reg, u8 count, u16 *buf) -{ - return ts->bops->multi_read(ts->dev, first_reg, count, buf); + error = regmap_read(ts->regmap, reg, &val); + if (error) { + dev_err(ts->dev, "failed to read register %#02x: %d\n", + reg, error); + return error; + } + + return val; } static int ad7879_write(struct ad7879 *ts, u8 reg, u16 val) { - return ts->bops->write(ts->dev, reg, val); + int error; + + error = regmap_write(ts->regmap, reg, val); + if (error) { + dev_err(ts->dev, + "failed to write %#04x to register %#02x: %d\n", + val, reg, error); + return error; + } + + return 0; } static int ad7879_report(struct ad7879 *ts) @@ -234,7 +247,8 @@ static irqreturn_t ad7879_irq(int irq, void *handle) { struct ad7879 *ts = handle; - ad7879_multi_read(ts, AD7879_REG_XPLUS, AD7879_NR_SENSE, ts->conversion_data); + regmap_bulk_read(ts->regmap, AD7879_REG_XPLUS, + ts->conversion_data, AD7879_NR_SENSE); if (!ad7879_report(ts)) mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT); @@ -511,8 +525,8 @@ static int ad7879_parse_dt(struct device *dev, struct ad7879 *ts) return 0; } -struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq, - const struct ad7879_bus_ops *bops) +struct ad7879 *ad7879_probe(struct device *dev, struct regmap *regmap, + int irq, u16 bustype, u8 devid) { struct ad7879_platform_data *pdata = dev_get_platdata(dev); struct ad7879 *ts; @@ -520,7 +534,7 @@ struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq, int err; u16 revid; - if (!irq) { + if (irq <= 0) { dev_err(dev, "No IRQ specified\n"); return ERR_PTR(-EINVAL); } @@ -553,10 +567,10 @@ struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq, return ERR_PTR(-ENOMEM); } - ts->bops = bops; ts->dev = dev; ts->input = input_dev; ts->irq = irq; + ts->regmap = regmap; setup_timer(&ts->timer, ad7879_timer, (unsigned long) ts); snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev)); @@ -564,7 +578,7 @@ struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq, input_dev->name = "AD7879 Touchscreen"; input_dev->phys = ts->phys; input_dev->dev.parent = dev; - input_dev->id.bustype = bops->bustype; + input_dev->id.bustype = bustype; input_dev->open = ad7879_open; input_dev->close = ad7879_close; diff --git a/drivers/input/touchscreen/ad7879.h b/drivers/input/touchscreen/ad7879.h index 6fd13c48d373..1131f8aa118b 100644 --- a/drivers/input/touchscreen/ad7879.h +++ b/drivers/input/touchscreen/ad7879.h @@ -13,18 +13,12 @@ struct ad7879; struct device; - -struct ad7879_bus_ops { - u16 bustype; - int (*read)(struct device *dev, u8 reg); - int (*multi_read)(struct device *dev, u8 first_reg, u8 count, u16 *buf); - int (*write)(struct device *dev, u8 reg, u16 val); -}; +struct regmap; extern const struct dev_pm_ops ad7879_pm_ops; -struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned irq, - const struct ad7879_bus_ops *bops); +struct ad7879 *ad7879_probe(struct device *dev, struct regmap *regmap, + int irq, u16 bustype, u8 devid); void ad7879_remove(struct ad7879 *); #endif