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author | Raghavendra Ganiga <ravi23ganiga@gmail.com> | 2016-08-31 22:56:41 +0530 |
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committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2016-09-22 00:14:40 +0200 |
commit | ee85bb5bbe4ae690b48625874bc2b6ecc981326e (patch) | |
tree | 15ec03b1bc8339d055e59f0d3dfb5128a7251145 /drivers/rtc/rtc-ds1347.c | |
parent | 68669d55f7ad31832692254485a07b6e412ae082 (diff) | |
download | linux-ee85bb5bbe4ae690b48625874bc2b6ecc981326e.tar.gz linux-ee85bb5bbe4ae690b48625874bc2b6ecc981326e.tar.bz2 linux-ee85bb5bbe4ae690b48625874bc2b6ecc981326e.zip |
rtc: ds1347: changed raw spi calls to register map calls
This patch changes calls of spi read write calls to register map
read and write calls in rtc ds1347
Signed-off-by: Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Diffstat (limited to 'drivers/rtc/rtc-ds1347.c')
-rw-r--r-- | drivers/rtc/rtc-ds1347.c | 96 |
1 files changed, 53 insertions, 43 deletions
diff --git a/drivers/rtc/rtc-ds1347.c b/drivers/rtc/rtc-ds1347.c index 641e8e8a0dd7..ccfc9d43eb1e 100644 --- a/drivers/rtc/rtc-ds1347.c +++ b/drivers/rtc/rtc-ds1347.c @@ -18,6 +18,7 @@ #include <linux/rtc.h> #include <linux/spi/spi.h> #include <linux/bcd.h> +#include <linux/regmap.h> /* Registers in ds1347 rtc */ @@ -32,37 +33,28 @@ #define DS1347_STATUS_REG 0x17 #define DS1347_CLOCK_BURST 0x3F -static int ds1347_read_reg(struct device *dev, unsigned char address, - unsigned char *data) -{ - struct spi_device *spi = to_spi_device(dev); - - *data = address | 0x80; - - return spi_write_then_read(spi, data, 1, data, 1); -} - -static int ds1347_write_reg(struct device *dev, unsigned char address, - unsigned char data) -{ - struct spi_device *spi = to_spi_device(dev); - unsigned char buf[2]; - - buf[0] = address & 0x7F; - buf[1] = data; +static const struct regmap_range ds1347_ranges[] = { + { + .range_min = DS1347_SECONDS_REG, + .range_max = DS1347_STATUS_REG, + }, +}; - return spi_write_then_read(spi, buf, 2, NULL, 0); -} +static const struct regmap_access_table ds1347_access_table = { + .yes_ranges = ds1347_ranges, + .n_yes_ranges = ARRAY_SIZE(ds1347_ranges), +}; static int ds1347_read_time(struct device *dev, struct rtc_time *dt) { struct spi_device *spi = to_spi_device(dev); + struct regmap *map; int err; unsigned char buf[8]; - buf[0] = DS1347_CLOCK_BURST | 0x80; + map = spi_get_drvdata(spi); - err = spi_write_then_read(spi, buf, 1, buf, 8); + err = regmap_bulk_read(map, DS1347_CLOCK_BURST, buf, 8); if (err) return err; @@ -80,25 +72,27 @@ static int ds1347_read_time(struct device *dev, struct rtc_time *dt) static int ds1347_set_time(struct device *dev, struct rtc_time *dt) { struct spi_device *spi = to_spi_device(dev); - unsigned char buf[9]; + struct regmap *map; + unsigned char buf[8]; + + map = spi_get_drvdata(spi); - buf[0] = DS1347_CLOCK_BURST & 0x7F; - buf[1] = bin2bcd(dt->tm_sec); - buf[2] = bin2bcd(dt->tm_min); - buf[3] = (bin2bcd(dt->tm_hour) & 0x3F); - buf[4] = bin2bcd(dt->tm_mday); - buf[5] = bin2bcd(dt->tm_mon + 1); - buf[6] = bin2bcd(dt->tm_wday + 1); + buf[0] = bin2bcd(dt->tm_sec); + buf[1] = bin2bcd(dt->tm_min); + buf[2] = (bin2bcd(dt->tm_hour) & 0x3F); + buf[3] = bin2bcd(dt->tm_mday); + buf[4] = bin2bcd(dt->tm_mon + 1); + buf[5] = bin2bcd(dt->tm_wday + 1); /* year in linux is from 1900 i.e in range of 100 in rtc it is from 00 to 99 */ dt->tm_year = dt->tm_year % 100; - buf[7] = bin2bcd(dt->tm_year); - buf[8] = bin2bcd(0x00); + buf[6] = bin2bcd(dt->tm_year); + buf[7] = bin2bcd(0x00); /* write the rtc settings */ - return spi_write_then_read(spi, buf, 9, NULL, 0); + return regmap_bulk_write(map, DS1347_CLOCK_BURST, buf, 8); } static const struct rtc_class_ops ds1347_rtc_ops = { @@ -109,35 +103,53 @@ static const struct rtc_class_ops ds1347_rtc_ops = { static int ds1347_probe(struct spi_device *spi) { struct rtc_device *rtc; - unsigned char data; + struct regmap_config config; + struct regmap *map; + unsigned int data; int res; + memset(&config, 0, sizeof(config)); + config.reg_bits = 8; + config.val_bits = 8; + config.read_flag_mask = 0x80; + config.max_register = 0x3F; + config.wr_table = &ds1347_access_table; + /* spi setup with ds1347 in mode 3 and bits per word as 8 */ spi->mode = SPI_MODE_3; spi->bits_per_word = 8; spi_setup(spi); + map = devm_regmap_init_spi(spi, &config); + + if (IS_ERR(map)) { + dev_err(&spi->dev, "ds1347 regmap init spi failed\n"); + return PTR_ERR(map); + } + + spi_set_drvdata(spi, map); + /* RTC Settings */ - res = ds1347_read_reg(&spi->dev, DS1347_SECONDS_REG, &data); + res = regmap_read(map, DS1347_SECONDS_REG, &data); if (res) return res; /* Disable the write protect of rtc */ - ds1347_read_reg(&spi->dev, DS1347_CONTROL_REG, &data); + regmap_read(map, DS1347_CONTROL_REG, &data); data = data & ~(1<<7); - ds1347_write_reg(&spi->dev, DS1347_CONTROL_REG, data); + regmap_write(map, DS1347_CONTROL_REG, data); /* Enable the oscillator , disable the oscillator stop flag, and glitch filter to reduce current consumption */ - ds1347_read_reg(&spi->dev, DS1347_STATUS_REG, &data); + regmap_read(map, DS1347_STATUS_REG, &data); data = data & 0x1B; - ds1347_write_reg(&spi->dev, DS1347_STATUS_REG, data); + regmap_write(map, DS1347_STATUS_REG, data); /* display the settings */ - ds1347_read_reg(&spi->dev, DS1347_CONTROL_REG, &data); + regmap_read(map, DS1347_CONTROL_REG, &data); dev_info(&spi->dev, "DS1347 RTC CTRL Reg = 0x%02x\n", data); - ds1347_read_reg(&spi->dev, DS1347_STATUS_REG, &data); + regmap_read(map, DS1347_STATUS_REG, &data); dev_info(&spi->dev, "DS1347 RTC Status Reg = 0x%02x\n", data); rtc = devm_rtc_device_register(&spi->dev, "ds1347", @@ -146,8 +158,6 @@ static int ds1347_probe(struct spi_device *spi) if (IS_ERR(rtc)) return PTR_ERR(rtc); - spi_set_drvdata(spi, rtc); - return 0; } |