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Date: Sun, 23 Feb 2014 23:07:49 +0100
From: Sebastian Reichel <sre@...ian.org>
To: Sebastian Reichel <sre@...g0.de>,
Marek Belisko <marek@...delico.com>,
Jonathan Cameron <jic23@...nel.org>
Cc: Lee Jones <lee.jones@...aro.org>,
Samuel Ortiz <sameo@...ux.intel.com>,
Lars-Peter Clausen <lars@...afoo.de>,
Rob Herring <robh+dt@...nel.org>,
Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Grant Likely <grant.likely@...aro.org>,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
linux-iio@...r.kernel.org, Sebastian Reichel <sre@...ian.org>
Subject: [RFCv2 3/5] mfd: twl4030-madc: Cleanup driver
Some style fixes in twl4030-madc driver.
Reported-by: Jonathan Cameron <jic23@...nel.org>
Signed-off-by: Sebastian Reichel <sre@...ian.org>
---
drivers/mfd/twl4030-madc.c | 66 ++++++++++++++++++++--------------------------
1 file changed, 29 insertions(+), 37 deletions(-)
diff --git a/drivers/mfd/twl4030-madc.c b/drivers/mfd/twl4030-madc.c
index 5e67c75..0bc79a7 100644
--- a/drivers/mfd/twl4030-madc.c
+++ b/drivers/mfd/twl4030-madc.c
@@ -62,8 +62,8 @@ struct twl4030_madc_data {
struct mutex lock; /* mutex protecting this data structure */
struct twl4030_madc_request requests[TWL4030_MADC_NUM_METHODS];
bool use_second_irq;
- int imr;
- int isr;
+ u8 imr;
+ u8 isr;
};
static int twl4030_madc_read(struct iio_dev *iio_dev,
@@ -242,13 +242,13 @@ static int twl4030battery_temperature(int raw_volt)
REG_BCICTL2);
if (ret < 0)
return ret;
+
curr = ((val & TWL4030_BCI_ITHEN) + 1) * 10;
/* Getting and calculating the thermistor resistance in ohms */
res = volt * 1000 / curr;
/* calculating temperature */
for (temp = 58; temp >= 0; temp--) {
int actual = therm_tbl[temp];
-
if ((actual - res) >= 0)
break;
}
@@ -270,6 +270,7 @@ static int twl4030battery_current(int raw_volt)
else /* slope of 0.88 mV/mA */
return (raw_volt * CURR_STEP_SIZE) / CURR_PSR_R2;
}
+
/*
* Function to read channel values
* @madc - pointer to twl4030_madc_data struct
@@ -285,17 +286,14 @@ static int twl4030_madc_read_channels(struct twl4030_madc_data *madc,
long channels, int *buf,
bool raw)
{
- int count = 0, count_req = 0, i;
- u8 reg;
+ int count = 0, i;
for_each_set_bit(i, &channels, TWL4030_MADC_MAX_CHANNELS) {
- reg = reg_base + 2 * i;
- buf[i] = twl4030_madc_channel_raw_read(madc, reg);
+ buf[i] = twl4030_madc_channel_raw_read(madc, reg_base + 2 * i);
if (buf[i] < 0) {
- dev_err(madc->dev,
- "Unable to read register 0x%X\n", reg);
- count_req++;
- continue;
+ dev_err(madc->dev, "Unable to read register 0x%X\n",
+ reg_base + 2 * i);
+ return buf[i];
}
if (raw) {
count++;
@@ -306,7 +304,7 @@ static int twl4030_madc_read_channels(struct twl4030_madc_data *madc,
buf[i] = twl4030battery_current(buf[i]);
if (buf[i] < 0) {
dev_err(madc->dev, "err reading current\n");
- count_req++;
+ return buf[i];
} else {
count++;
buf[i] = buf[i] - 750;
@@ -316,7 +314,7 @@ static int twl4030_madc_read_channels(struct twl4030_madc_data *madc,
buf[i] = twl4030battery_temperature(buf[i]);
if (buf[i] < 0) {
dev_err(madc->dev, "err reading temperature\n");
- count_req++;
+ return buf[i];
} else {
buf[i] -= 3;
count++;
@@ -337,8 +335,6 @@ static int twl4030_madc_read_channels(struct twl4030_madc_data *madc,
twl4030_divider_ratios[i].numerator);
}
}
- if (count_req)
- dev_err(madc->dev, "%d channel conversion failed\n", count_req);
return count;
}
@@ -362,13 +358,13 @@ static int twl4030_madc_enable_irq(struct twl4030_madc_data *madc, u8 id)
madc->imr);
return ret;
}
+
val &= ~(1 << id);
ret = twl_i2c_write_u8(TWL4030_MODULE_MADC, val, madc->imr);
if (ret) {
dev_err(madc->dev,
"unable to write imr register 0x%X\n", madc->imr);
return ret;
-
}
return 0;
@@ -513,21 +509,17 @@ static int twl4030_madc_start_conversion(struct twl4030_madc_data *madc,
{
const struct twl4030_madc_conversion_method *method;
int ret = 0;
+
+ if (conv_method != TWL4030_MADC_SW1 && conv_method != TWL4030_MADC_SW2)
+ return -ENOTSUPP;
+
method = &twl4030_conversion_methods[conv_method];
- switch (conv_method) {
- case TWL4030_MADC_SW1:
- case TWL4030_MADC_SW2:
- ret = twl_i2c_write_u8(TWL4030_MODULE_MADC,
- TWL4030_MADC_SW_START, method->ctrl);
- if (ret) {
- dev_err(madc->dev,
- "unable to write ctrl register 0x%X\n",
- method->ctrl);
- return ret;
- }
- break;
- default:
- break;
+ ret = twl_i2c_write_u8(TWL4030_MODULE_MADC, TWL4030_MADC_SW_START,
+ method->ctrl);
+ if (ret) {
+ dev_err(madc->dev, "unable to write ctrl register 0x%X\n",
+ method->ctrl);
+ return ret;
}
return 0;
@@ -625,7 +617,7 @@ int twl4030_madc_conversion(struct twl4030_madc_request *req)
if (ret) {
dev_err(twl4030_madc->dev,
"unable to write sel reg 0x%X\n",
- method->sel + 1);
+ method->avg);
goto out;
}
}
@@ -666,10 +658,6 @@ out:
}
EXPORT_SYMBOL_GPL(twl4030_madc_conversion);
-/*
- * Return channel value
- * Or < 0 on failure.
- */
int twl4030_get_madc_conversion(int channel_no)
{
struct twl4030_madc_request req;
@@ -704,6 +692,7 @@ static int twl4030_madc_set_current_generator(struct twl4030_madc_data *madc,
int chan, int on)
{
int ret;
+ int regmask;
u8 regval;
ret = twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE,
@@ -713,10 +702,13 @@ static int twl4030_madc_set_current_generator(struct twl4030_madc_data *madc,
TWL4030_BCI_BCICTL1);
return ret;
}
+
+ regmask = (chan == 0) ? TWL4030_BCI_TYPEN : TWL4030_BCI_ITHEN;
if (on)
- regval |= chan ? TWL4030_BCI_ITHEN : TWL4030_BCI_TYPEN;
+ regval |= regmask;
else
- regval &= chan ? ~TWL4030_BCI_ITHEN : ~TWL4030_BCI_TYPEN;
+ regval &= ~regmask;
+
ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE,
regval, TWL4030_BCI_BCICTL1);
if (ret) {
--
1.8.5.3
--
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