From 3f6a0bad61e34c648fd08ff8dcbfdd58148963d2 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Thu, 10 Jan 2013 16:18:00 +0000 Subject: [PATCH] staging:iio:tsl2x7x: Use iio_str_to_fixedpoint instead of open-coding it The tsl2x7x driver has a copy'n'pasted version of the iio_str_to_fixedpoint() function from the IIO core. Replace this custom copy and use iio_str_to_fixedpoint instead. The patch also introduces a slight functional change in that it makes sure that in case of a parsing error the error is reported back to userspace instead of silently ignoring it. Signed-off-by: Lars-Peter Clausen Acked-by: Jon Brenner Signed-off-by: Jonathan Cameron --- drivers/staging/iio/light/tsl2x7x_core.c | 78 ++++-------------------- 1 file changed, 12 insertions(+), 66 deletions(-) diff --git a/drivers/staging/iio/light/tsl2x7x_core.c b/drivers/staging/iio/light/tsl2x7x_core.c index 9e50fbbadf9d..a58731e70bb9 100644 --- a/drivers/staging/iio/light/tsl2x7x_core.c +++ b/drivers/staging/iio/light/tsl2x7x_core.c @@ -291,59 +291,6 @@ static const u8 device_channel_config[] = { ALSPRX2 }; -/** - * tsl2x7x_parse_buffer() - parse a decimal result from a buffer. - * @*buf: pointer to char buffer to parse - * @*result: pointer to buffer to contain - * resulting interger / decimal as ints. - * - */ -static int -tsl2x7x_parse_buffer(const char *buf, struct tsl2x7x_parse_result *result) -{ - int integer = 0, fract = 0, fract_mult = 100000; - bool integer_part = true, negative = false; - - if (buf[0] == '-') { - negative = true; - buf++; - } - - while (*buf) { - if ('0' <= *buf && *buf <= '9') { - if (integer_part) - integer = integer*10 + *buf - '0'; - else { - fract += fract_mult*(*buf - '0'); - if (fract_mult == 1) - break; - fract_mult /= 10; - } - } else if (*buf == '\n') { - if (*(buf + 1) == '\0') - break; - else - return -EINVAL; - } else if (*buf == '.') { - integer_part = false; - } else { - return -EINVAL; - } - buf++; - } - if (negative) { - if (integer) - integer = -integer; - else - fract = -fract; - } - - result->integer = integer; - result->fract = fract; - - return 0; -} - /** * tsl2x7x_i2c_read() - Read a byte from a register. * @client: i2c client @@ -1036,13 +983,12 @@ static ssize_t tsl2x7x_als_time_store(struct device *dev, struct iio_dev *indio_dev = dev_to_iio_dev(dev); struct tsl2X7X_chip *chip = iio_priv(indio_dev); struct tsl2x7x_parse_result result; + int ret; - result.integer = 0; - result.fract = 0; - - tsl2x7x_parse_buffer(buf, &result); + ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract); + if (ret) + return ret; - result.fract /= 1000; result.fract /= 3; chip->tsl2x7x_settings.als_time = (TSL2X7X_MAX_TIMER_CNT - (u8)result.fract); @@ -1109,12 +1055,12 @@ static ssize_t tsl2x7x_als_persistence_store(struct device *dev, struct tsl2X7X_chip *chip = iio_priv(indio_dev); struct tsl2x7x_parse_result result; int y, z, filter_delay; + int ret; - result.integer = 0; - result.fract = 0; - tsl2x7x_parse_buffer(buf, &result); + ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract); + if (ret) + return ret; - result.fract /= 1000; y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1; z = y * TSL2X7X_MIN_ITIME; @@ -1155,12 +1101,12 @@ static ssize_t tsl2x7x_prox_persistence_store(struct device *dev, struct tsl2X7X_chip *chip = iio_priv(indio_dev); struct tsl2x7x_parse_result result; int y, z, filter_delay; + int ret; - result.integer = 0; - result.fract = 0; - tsl2x7x_parse_buffer(buf, &result); + ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract); + if (ret) + return ret; - result.fract /= 1000; y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1; z = y * TSL2X7X_MIN_ITIME; -- 2.30.2