On 26/02/14 20:03, Sebastian Reichel wrote:
Simplify reading and writing of 16 bit TWL registers in the
driver by using twl_i2c_read_u16 and twl_i2c_write_u16.
Signed-off-by: Sebastian Reichel <sre@xxxxxxxxxx>
Acked-by: Lee Jones <lee.jones@xxxxxxxxxx>
Nice
Acked-by: Jonathan Cameron <jic23@xxxxxxxxxx>
---
drivers/mfd/twl4030-madc.c | 39 ++++++++-------------------------------
1 file changed, 8 insertions(+), 31 deletions(-)
diff --git a/drivers/mfd/twl4030-madc.c b/drivers/mfd/twl4030-madc.c
index c90013e..d918670 100644
--- a/drivers/mfd/twl4030-madc.c
+++ b/drivers/mfd/twl4030-madc.c
@@ -206,25 +206,19 @@ const struct twl4030_madc_conversion_method twl4030_conversion_methods[] = {
*/
static int twl4030_madc_channel_raw_read(struct twl4030_madc_data *madc, u8 reg)
{
- u8 msb, lsb;
+ u16 val;
int ret;
/*
* For each ADC channel, we have MSB and LSB register pair. MSB address
* is always LSB address+1. reg parameter is the address of LSB register
*/
- ret = twl_i2c_read_u8(TWL4030_MODULE_MADC, &msb, reg + 1);
+ ret = twl_i2c_read_u16(TWL4030_MODULE_MADC, &val, reg);
if (ret) {
- dev_err(madc->dev, "unable to read MSB register 0x%X\n",
- reg + 1);
- return ret;
- }
- ret = twl_i2c_read_u8(TWL4030_MODULE_MADC, &lsb, reg);
- if (ret) {
- dev_err(madc->dev, "unable to read LSB register 0x%X\n", reg);
+ dev_err(madc->dev, "unable to read register 0x%X\n", reg);
return ret;
}
- return (int)(((msb << 8) | lsb) >> 6);
+ return (int)(val >> 6);
}
/*
@@ -573,7 +567,6 @@ static int twl4030_madc_wait_conversion_ready(struct twl4030_madc_data *madc,
int twl4030_madc_conversion(struct twl4030_madc_request *req)
{
const struct twl4030_madc_conversion_method *method;
- u8 ch_msb, ch_lsb;
int ret;
if (!req || !twl4030_madc)
@@ -589,37 +582,21 @@ int twl4030_madc_conversion(struct twl4030_madc_request *req)
ret = -EBUSY;
goto out;
}
- ch_msb = (req->channels >> 8) & 0xff;
- ch_lsb = req->channels & 0xff;
method = &twl4030_conversion_methods[req->method];
/* Select channels to be converted */
- ret = twl_i2c_write_u8(TWL4030_MODULE_MADC, ch_msb, method->sel + 1);
+ ret = twl_i2c_write_u16(TWL4030_MODULE_MADC, req->channels, method->sel);
if (ret) {
dev_err(twl4030_madc->dev,
- "unable to write sel register 0x%X\n", method->sel + 1);
- goto out;
- }
- ret = twl_i2c_write_u8(TWL4030_MODULE_MADC, ch_lsb, method->sel);
- if (ret) {
- dev_err(twl4030_madc->dev,
- "unable to write sel register 0x%X\n", method->sel + 1);
+ "unable to write sel register 0x%X\n", method->sel);
goto out;
}
/* Select averaging for all channels if do_avg is set */
if (req->do_avg) {
- ret = twl_i2c_write_u8(TWL4030_MODULE_MADC,
- ch_msb, method->avg + 1);
+ ret = twl_i2c_write_u16(TWL4030_MODULE_MADC, req->channels,
+ method->avg);
if (ret) {
dev_err(twl4030_madc->dev,
"unable to write avg register 0x%X\n",
- method->avg + 1);
- goto out;
- }
- ret = twl_i2c_write_u8(TWL4030_MODULE_MADC,
- ch_lsb, method->avg);
- if (ret) {
- dev_err(twl4030_madc->dev,
- "unable to write avg reg 0x%X\n",
method->avg);
goto out;
}
--
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