/*
- * Freescale i.MX28 LRADC driver
+ * Freescale MXS LRADC driver
*
* Copyright (c) 2012 DENX Software Engineering, GmbH.
* Marek Vasut <marex@denx.de>
* GNU General Public License for more details.
*/
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/device.h>
#include <linux/err.h>
+#include <linux/input.h>
#include <linux/interrupt.h>
-#include <linux/device.h>
+#include <linux/io.h>
#include <linux/kernel.h>
-#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_device.h>
-#include <linux/sysfs.h>
-#include <linux/list.h>
-#include <linux/io.h>
-#include <linux/module.h>
#include <linux/platform_device.h>
-#include <linux/spinlock.h>
-#include <linux/wait.h>
-#include <linux/sched.h>
+#include <linux/slab.h>
#include <linux/stmp_device.h>
-#include <linux/bitops.h>
-#include <linux/completion.h>
-#include <linux/delay.h>
-#include <linux/input.h>
-#include <linux/clk.h>
+#include <linux/sysfs.h>
-#include <linux/iio/iio.h>
-#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
+#include <linux/iio/iio.h>
#include <linux/iio/trigger.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/sysfs.h>
#define DRIVER_NAME "mxs-lradc"
* Once the pen touches the touchscreen, the touchscreen switches from
* IRQ-driven mode to polling mode to prevent interrupt storm. The polling
* is realized by worker thread, which is called every 20 or so milliseconds.
- * This gives the touchscreen enough fluence and does not strain the system
+ * This gives the touchscreen enough fluency and does not strain the system
* too much.
*/
#define LRADC_TS_SAMPLE_DELAY_MS 5
/*
* The LRADC reads the following amount of samples from each touchscreen
- * channel and the driver then computes avarage of these.
+ * channel and the driver then computes average of these.
*/
#define LRADC_TS_SAMPLE_AMOUNT 4
struct mxs_lradc_of_config {
const int irq_count;
const char * const *irq_name;
- const uint32_t *vref_mv;
+ const u32 *vref_mv;
};
#define VREF_MV_BASE 1850
-static const uint32_t mx23_vref_mv[LRADC_MAX_TOTAL_CHANS] = {
+static const u32 mx23_vref_mv[LRADC_MAX_TOTAL_CHANS] = {
VREF_MV_BASE, /* CH0 */
VREF_MV_BASE, /* CH1 */
VREF_MV_BASE, /* CH2 */
VREF_MV_BASE * 4, /* CH15 VDD5V */
};
-static const uint32_t mx28_vref_mv[LRADC_MAX_TOTAL_CHANS] = {
+static const u32 mx28_vref_mv[LRADC_MAX_TOTAL_CHANS] = {
VREF_MV_BASE, /* CH0 */
VREF_MV_BASE, /* CH1 */
VREF_MV_BASE, /* CH2 */
struct clk *clk;
- uint32_t *buffer;
+ u32 *buffer;
struct iio_trigger *trig;
struct mutex lock;
struct completion completion;
- const uint32_t *vref_mv;
+ const u32 *vref_mv;
struct mxs_lradc_scale scale_avail[LRADC_MAX_TOTAL_CHANS][2];
unsigned long is_divided;
* CH5 -- Touch screen YNLR
* CH6 -- Touch screen WIPER (5-wire only)
*
- * The bitfields below represents which parts of the LRADC block are
+ * The bit fields below represents which parts of the LRADC block are
* switched into special mode of operation. These channels can not
* be sampled as regular LRADC channels. The driver will refuse any
* attempt to sample these channels.
struct input_dev *ts_input;
enum mxs_lradc_id soc;
- enum lradc_ts_plate cur_plate; /* statemachine */
+ enum lradc_ts_plate cur_plate; /* state machine */
bool ts_valid;
unsigned ts_x_pos;
unsigned ts_y_pos;
unsigned ch)
{
mxs_lradc_reg_clear(lradc, LRADC_CTRL4_LRADCSELECT_MASK(vch),
- LRADC_CTRL4);
+ LRADC_CTRL4);
mxs_lradc_reg_set(lradc, LRADC_CTRL4_LRADCSELECT(vch, ch), LRADC_CTRL4);
}
* otherwise, the IRQs will not fire."
*/
mxs_lradc_reg_wrt(lradc, LRADC_CH_ACCUMULATE |
- LRADC_CH_NUM_SAMPLES(lradc->over_sample_cnt - 1),
- LRADC_CH(ch));
+ LRADC_CH_NUM_SAMPLES(lradc->over_sample_cnt - 1),
+ LRADC_CH(ch));
/* from the datasheet:
* "Software must clear this register in preparation for a
* the LRADC will not trigger the delay group."
*/
mxs_lradc_reg_wrt(lradc, LRADC_DELAY_TRIGGER(1 << ch) |
- LRADC_DELAY_TRIGGER_DELAYS(0) |
- LRADC_DELAY_LOOP(lradc->over_sample_cnt - 1) |
- LRADC_DELAY_DELAY(lradc->over_sample_delay - 1),
- LRADC_DELAY(3));
+ LRADC_DELAY_TRIGGER_DELAYS(0) |
+ LRADC_DELAY_LOOP(lradc->over_sample_cnt - 1) |
+ LRADC_DELAY_DELAY(lradc->over_sample_delay - 1),
+ LRADC_DELAY(3));
mxs_lradc_reg_clear(lradc, LRADC_CTRL1_LRADC_IRQ(ch), LRADC_CTRL1);
* SoC's delay unit and start the conversion later
* and automatically.
*/
- mxs_lradc_reg_wrt(lradc,
+ mxs_lradc_reg_wrt(
+ lradc,
LRADC_DELAY_TRIGGER(0) | /* don't trigger ADC */
LRADC_DELAY_TRIGGER_DELAYS(BIT(3)) | /* trigger DELAY unit#3 */
LRADC_DELAY_KICK |
LRADC_DELAY_DELAY(lradc->settling_delay),
- LRADC_DELAY(2));
+ LRADC_DELAY(2));
}
/*
* hardware report one interrupt if both conversions are done
*/
static void mxs_lradc_setup_ts_pressure(struct mxs_lradc *lradc, unsigned ch1,
- unsigned ch2)
+ unsigned ch2)
{
u32 reg;
mxs_lradc_reg_clear(lradc, LRADC_CH_VALUE_MASK, LRADC_CH(ch2));
/* prepare the delay/loop unit according to the oversampling count */
- mxs_lradc_reg_wrt(lradc, LRADC_DELAY_TRIGGER(1 << ch1) |
- LRADC_DELAY_TRIGGER(1 << ch2) | /* start both channels */
- LRADC_DELAY_TRIGGER_DELAYS(0) |
- LRADC_DELAY_LOOP(lradc->over_sample_cnt - 1) |
- LRADC_DELAY_DELAY(lradc->over_sample_delay - 1),
- LRADC_DELAY(3));
+ mxs_lradc_reg_wrt(
+ lradc,
+ LRADC_DELAY_TRIGGER(1 << ch1) |
+ LRADC_DELAY_TRIGGER(1 << ch2) | /* start both channels */
+ LRADC_DELAY_TRIGGER_DELAYS(0) |
+ LRADC_DELAY_LOOP(lradc->over_sample_cnt - 1) |
+ LRADC_DELAY_DELAY(lradc->over_sample_delay - 1),
+ LRADC_DELAY(3));
mxs_lradc_reg_clear(lradc, LRADC_CTRL1_LRADC_IRQ(ch2), LRADC_CTRL1);
* SoC's delay unit and start the conversion later
* and automatically.
*/
- mxs_lradc_reg_wrt(lradc,
+ mxs_lradc_reg_wrt(
+ lradc,
LRADC_DELAY_TRIGGER(0) | /* don't trigger ADC */
LRADC_DELAY_TRIGGER_DELAYS(BIT(3)) | /* trigger DELAY unit#3 */
LRADC_DELAY_KICK |
}
static unsigned mxs_lradc_read_raw_channel(struct mxs_lradc *lradc,
- unsigned channel)
+ unsigned channel)
{
u32 reg;
unsigned num_samples, val;
}
static unsigned mxs_lradc_read_ts_pressure(struct mxs_lradc *lradc,
- unsigned ch1, unsigned ch2)
+ unsigned ch1, unsigned ch2)
{
u32 reg, mask;
unsigned pressure, m1, m2;
*/
mxs_lradc_reg_clear(lradc, mxs_lradc_plate_mask(lradc), LRADC_CTRL0);
mxs_lradc_reg_set(lradc, mxs_lradc_touch_detect_bit(lradc),
- LRADC_CTRL0);
+ LRADC_CTRL0);
}
/*
mxs_lradc_map_channel(lradc, TOUCHSCREEN_VCHANNEL1, TS_CH_YM);
mxs_lradc_map_channel(lradc, TOUCHSCREEN_VCHANNEL2, TS_CH_XP);
mxs_lradc_setup_ts_pressure(lradc, TOUCHSCREEN_VCHANNEL2,
- TOUCHSCREEN_VCHANNEL1);
+ TOUCHSCREEN_VCHANNEL1);
}
static void mxs_lradc_enable_touch_detection(struct mxs_lradc *lradc)
lradc->cur_plate = LRADC_TOUCH;
mxs_lradc_reg_clear(lradc, LRADC_CTRL1_TOUCH_DETECT_IRQ |
- LRADC_CTRL1_TOUCH_DETECT_IRQ_EN, LRADC_CTRL1);
+ LRADC_CTRL1_TOUCH_DETECT_IRQ_EN, LRADC_CTRL1);
mxs_lradc_reg_set(lradc, LRADC_CTRL1_TOUCH_DETECT_IRQ_EN, LRADC_CTRL1);
}
static void mxs_lradc_start_touch_event(struct mxs_lradc *lradc)
{
- mxs_lradc_reg_clear(lradc, LRADC_CTRL1_TOUCH_DETECT_IRQ_EN,
- LRADC_CTRL1);
+ mxs_lradc_reg_clear(lradc,
+ LRADC_CTRL1_TOUCH_DETECT_IRQ_EN,
+ LRADC_CTRL1);
mxs_lradc_reg_set(lradc,
- LRADC_CTRL1_LRADC_IRQ_EN(TOUCHSCREEN_VCHANNEL1), LRADC_CTRL1);
+ LRADC_CTRL1_LRADC_IRQ_EN(TOUCHSCREEN_VCHANNEL1),
+ LRADC_CTRL1);
/*
* start with the Y-pos, because it uses nearly the same plate
* settings like the touch detection
*/
mxs_lradc_reg_wrt(lradc, 0, LRADC_CH(TOUCHSCREEN_VCHANNEL1));
mxs_lradc_reg_clear(lradc,
- LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL1) |
- LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL2), LRADC_CTRL1);
- mxs_lradc_reg_wrt(lradc,
- LRADC_DELAY_TRIGGER(1 << TOUCHSCREEN_VCHANNEL1) |
- LRADC_DELAY_KICK | LRADC_DELAY_DELAY(10), /* waste 5 ms */
- LRADC_DELAY(2));
+ LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL1) |
+ LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL2),
+ LRADC_CTRL1);
+ mxs_lradc_reg_wrt(
+ lradc,
+ LRADC_DELAY_TRIGGER(1 << TOUCHSCREEN_VCHANNEL1) |
+ LRADC_DELAY_KICK | LRADC_DELAY_DELAY(10), /* waste 5 ms */
+ LRADC_DELAY(2));
}
/*
lradc->cur_plate = LRADC_TOUCH;
mxs_lradc_reg_wrt(lradc, 0, LRADC_DELAY(2));
mxs_lradc_reg_wrt(lradc, 0, LRADC_DELAY(3));
- mxs_lradc_reg_clear(lradc, LRADC_CTRL1_TOUCH_DETECT_IRQ |
- LRADC_CTRL1_LRADC_IRQ_EN(TOUCHSCREEN_VCHANNEL1) |
- LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL1), LRADC_CTRL1);
+ mxs_lradc_reg_clear(lradc,
+ LRADC_CTRL1_TOUCH_DETECT_IRQ |
+ LRADC_CTRL1_LRADC_IRQ_EN(TOUCHSCREEN_VCHANNEL1) |
+ LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL1),
+ LRADC_CTRL1);
mxs_lradc_reg_set(lradc, LRADC_CTRL1_TOUCH_DETECT_IRQ_EN, LRADC_CTRL1);
}
if (mxs_lradc_check_touch_event(lradc))
mxs_lradc_start_touch_event(lradc);
mxs_lradc_reg_clear(lradc, LRADC_CTRL1_TOUCH_DETECT_IRQ,
- LRADC_CTRL1);
+ LRADC_CTRL1);
return;
case LRADC_SAMPLE_Y:
- lradc->ts_y_pos = mxs_lradc_read_raw_channel(lradc,
- TOUCHSCREEN_VCHANNEL1);
+ lradc->ts_y_pos =
+ mxs_lradc_read_raw_channel(lradc,
+ TOUCHSCREEN_VCHANNEL1);
mxs_lradc_prepare_x_pos(lradc);
return;
case LRADC_SAMPLE_X:
- lradc->ts_x_pos = mxs_lradc_read_raw_channel(lradc,
- TOUCHSCREEN_VCHANNEL1);
+ lradc->ts_x_pos =
+ mxs_lradc_read_raw_channel(lradc,
+ TOUCHSCREEN_VCHANNEL1);
mxs_lradc_prepare_pressure(lradc);
return;
case LRADC_SAMPLE_PRESSURE:
- lradc->ts_pressure = mxs_lradc_read_ts_pressure(lradc,
- TOUCHSCREEN_VCHANNEL2,
- TOUCHSCREEN_VCHANNEL1);
+ lradc->ts_pressure =
+ mxs_lradc_read_ts_pressure(lradc,
+ TOUCHSCREEN_VCHANNEL2,
+ TOUCHSCREEN_VCHANNEL1);
mxs_lradc_complete_touch_event(lradc);
return;
int ret;
/*
- * See if there is no buffered operation in progess. If there is, simply
+ * See if there is no buffered operation in progress. If there is, simply
* bail out. This can be improved to support both buffered and raw IO at
* the same time, yet the code becomes horribly complicated. Therefore I
* applied KISS principle here.
*/
if (lradc->soc == IMX28_LRADC)
mxs_lradc_reg_clear(lradc, LRADC_CTRL1_LRADC_IRQ_EN(0),
- LRADC_CTRL1);
+ LRADC_CTRL1);
mxs_lradc_reg_clear(lradc, 0x1, LRADC_CTRL0);
/* Enable / disable the divider per requirement */
if (test_bit(chan, &lradc->is_divided))
- mxs_lradc_reg_set(lradc, 1 << LRADC_CTRL2_DIVIDE_BY_TWO_OFFSET,
- LRADC_CTRL2);
+ mxs_lradc_reg_set(lradc,
+ 1 << LRADC_CTRL2_DIVIDE_BY_TWO_OFFSET,
+ LRADC_CTRL2);
else
mxs_lradc_reg_clear(lradc,
- 1 << LRADC_CTRL2_DIVIDE_BY_TWO_OFFSET, LRADC_CTRL2);
+ 1 << LRADC_CTRL2_DIVIDE_BY_TWO_OFFSET,
+ LRADC_CTRL2);
/* Clean the slot's previous content, then set new one. */
mxs_lradc_reg_clear(lradc, LRADC_CTRL4_LRADCSELECT_MASK(0),
- LRADC_CTRL4);
+ LRADC_CTRL4);
mxs_lradc_reg_set(lradc, chan, LRADC_CTRL4);
mxs_lradc_reg_wrt(lradc, 0, LRADC_CH(0));
}
static int mxs_lradc_read_raw(struct iio_dev *iio_dev,
- const struct iio_chan_spec *chan,
- int *val, int *val2, long m)
+ const struct iio_chan_spec *chan,
+ int *val, int *val2, long m)
{
struct mxs_lradc *lradc = iio_priv(iio_dev);
case IIO_CHAN_INFO_OFFSET:
if (chan->type == IIO_TEMP) {
/* The calculated value from the ADC is in Kelvin, we
- * want Celsius for hwmon so the offset is
- * -272.15 * scale
+ * want Celsius for hwmon so the offset is -273.15
+ * The offset is applied before scaling so it is
+ * actually -213.15 * 4 / 1.012 = -1079.644268
*/
- *val = -1075;
- *val2 = 691699;
+ *val = -1079;
+ *val2 = 644268;
return IIO_VAL_INT_PLUS_MICRO;
}
}
static ssize_t mxs_lradc_show_scale_available_ch(struct device *dev,
- struct device_attribute *attr,
- char *buf,
- int ch)
+ struct device_attribute *attr,
+ char *buf,
+ int ch)
{
struct iio_dev *iio = dev_to_iio_dev(dev);
struct mxs_lradc *lradc = iio_priv(iio);
}
static ssize_t mxs_lradc_show_scale_available(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+ struct device_attribute *attr,
+ char *buf)
{
struct iio_dev_attr *iio_attr = to_iio_dev_attr(attr);
struct iio_dev *iio = data;
struct mxs_lradc *lradc = iio_priv(iio);
unsigned long reg = readl(lradc->base + LRADC_CTRL1);
- uint32_t clr_irq = mxs_lradc_irq_mask(lradc);
- const uint32_t ts_irq_mask =
+ u32 clr_irq = mxs_lradc_irq_mask(lradc);
+ const u32 ts_irq_mask =
LRADC_CTRL1_TOUCH_DETECT_IRQ |
LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL1) |
LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL2);
struct iio_poll_func *pf = p;
struct iio_dev *iio = pf->indio_dev;
struct mxs_lradc *lradc = iio_priv(iio);
- const uint32_t chan_value = LRADC_CH_ACCUMULATE |
+ const u32 chan_value = LRADC_CH_ACCUMULATE |
((LRADC_DELAY_TIMER_LOOP - 1) << LRADC_CH_NUM_SAMPLES_OFFSET);
unsigned int i, j = 0;
{
struct iio_dev *iio = iio_trigger_get_drvdata(trig);
struct mxs_lradc *lradc = iio_priv(iio);
- const uint32_t st = state ? STMP_OFFSET_REG_SET : STMP_OFFSET_REG_CLR;
+ const u32 st = state ? STMP_OFFSET_REG_SET : STMP_OFFSET_REG_CLR;
mxs_lradc_reg_wrt(lradc, LRADC_DELAY_KICK, LRADC_DELAY(0) + st);
struct mxs_lradc *lradc = iio_priv(iio);
trig = iio_trigger_alloc("%s-dev%i", iio->name, iio->id);
- if (trig == NULL)
+ if (!trig)
return -ENOMEM;
trig->dev.parent = lradc->dev;
struct mxs_lradc *lradc = iio_priv(iio);
int ret = 0, chan, ofs = 0;
unsigned long enable = 0;
- uint32_t ctrl4_set = 0;
- uint32_t ctrl4_clr = 0;
- uint32_t ctrl1_irq = 0;
- const uint32_t chan_value = LRADC_CH_ACCUMULATE |
+ u32 ctrl4_set = 0;
+ u32 ctrl4_clr = 0;
+ u32 ctrl1_irq = 0;
+ const u32 chan_value = LRADC_CH_ACCUMULATE |
((LRADC_DELAY_TIMER_LOOP - 1) << LRADC_CH_NUM_SAMPLES_OFFSET);
const int len = bitmap_weight(iio->active_scan_mask,
LRADC_MAX_TOTAL_CHANS);
}
if (lradc->soc == IMX28_LRADC)
- mxs_lradc_reg_clear(lradc,
+ mxs_lradc_reg_clear(
+ lradc,
lradc->buffer_vchans << LRADC_CTRL1_LRADC_IRQ_EN_OFFSET,
LRADC_CTRL1);
mxs_lradc_reg_clear(lradc, lradc->buffer_vchans, LRADC_CTRL0);
}
mxs_lradc_reg_clear(lradc, LRADC_DELAY_TRIGGER_LRADCS_MASK |
- LRADC_DELAY_KICK, LRADC_DELAY(0));
+ LRADC_DELAY_KICK, LRADC_DELAY(0));
mxs_lradc_reg_clear(lradc, ctrl4_clr, LRADC_CTRL4);
mxs_lradc_reg_set(lradc, ctrl4_set, LRADC_CTRL4);
mxs_lradc_reg_set(lradc, ctrl1_irq, LRADC_CTRL1);
mxs_lradc_reg_set(lradc, enable << LRADC_DELAY_TRIGGER_LRADCS_OFFSET,
- LRADC_DELAY(0));
+ LRADC_DELAY(0));
return 0;
struct mxs_lradc *lradc = iio_priv(iio);
mxs_lradc_reg_clear(lradc, LRADC_DELAY_TRIGGER_LRADCS_MASK |
- LRADC_DELAY_KICK, LRADC_DELAY(0));
+ LRADC_DELAY_KICK, LRADC_DELAY(0));
mxs_lradc_reg_clear(lradc, lradc->buffer_vchans, LRADC_CTRL0);
if (lradc->soc == IMX28_LRADC)
- mxs_lradc_reg_clear(lradc,
+ mxs_lradc_reg_clear(
+ lradc,
lradc->buffer_vchans << LRADC_CTRL1_LRADC_IRQ_EN_OFFSET,
LRADC_CTRL1);
}
static bool mxs_lradc_validate_scan_mask(struct iio_dev *iio,
- const unsigned long *mask)
+ const unsigned long *mask)
{
struct mxs_lradc *lradc = iio_priv(iio);
const int map_chans = bitmap_weight(mask, LRADC_MAX_TOTAL_CHANS);
* Driver initialization
*/
-#define MXS_ADC_CHAN(idx, chan_type) { \
+#define MXS_ADC_CHAN(idx, chan_type, name) { \
.type = (chan_type), \
.indexed = 1, \
.scan_index = (idx), \
.realbits = LRADC_RESOLUTION, \
.storagebits = 32, \
}, \
+ .datasheet_name = (name), \
}
-static const struct iio_chan_spec mxs_lradc_chan_spec[] = {
- MXS_ADC_CHAN(0, IIO_VOLTAGE),
- MXS_ADC_CHAN(1, IIO_VOLTAGE),
- MXS_ADC_CHAN(2, IIO_VOLTAGE),
- MXS_ADC_CHAN(3, IIO_VOLTAGE),
- MXS_ADC_CHAN(4, IIO_VOLTAGE),
- MXS_ADC_CHAN(5, IIO_VOLTAGE),
- MXS_ADC_CHAN(6, IIO_VOLTAGE),
- MXS_ADC_CHAN(7, IIO_VOLTAGE), /* VBATT */
+static const struct iio_chan_spec mx23_lradc_chan_spec[] = {
+ MXS_ADC_CHAN(0, IIO_VOLTAGE, "LRADC0"),
+ MXS_ADC_CHAN(1, IIO_VOLTAGE, "LRADC1"),
+ MXS_ADC_CHAN(2, IIO_VOLTAGE, "LRADC2"),
+ MXS_ADC_CHAN(3, IIO_VOLTAGE, "LRADC3"),
+ MXS_ADC_CHAN(4, IIO_VOLTAGE, "LRADC4"),
+ MXS_ADC_CHAN(5, IIO_VOLTAGE, "LRADC5"),
+ MXS_ADC_CHAN(6, IIO_VOLTAGE, "VDDIO"),
+ MXS_ADC_CHAN(7, IIO_VOLTAGE, "VBATT"),
+ /* Combined Temperature sensors */
+ {
+ .type = IIO_TEMP,
+ .indexed = 1,
+ .scan_index = 8,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .channel = 8,
+ .scan_type = {.sign = 'u', .realbits = 18, .storagebits = 32,},
+ .datasheet_name = "TEMP_DIE",
+ },
+ /* Hidden channel to keep indexes */
+ {
+ .type = IIO_TEMP,
+ .indexed = 1,
+ .scan_index = -1,
+ .channel = 9,
+ },
+ MXS_ADC_CHAN(10, IIO_VOLTAGE, NULL),
+ MXS_ADC_CHAN(11, IIO_VOLTAGE, NULL),
+ MXS_ADC_CHAN(12, IIO_VOLTAGE, "USB_DP"),
+ MXS_ADC_CHAN(13, IIO_VOLTAGE, "USB_DN"),
+ MXS_ADC_CHAN(14, IIO_VOLTAGE, "VBG"),
+ MXS_ADC_CHAN(15, IIO_VOLTAGE, "VDD5V"),
+};
+
+static const struct iio_chan_spec mx28_lradc_chan_spec[] = {
+ MXS_ADC_CHAN(0, IIO_VOLTAGE, "LRADC0"),
+ MXS_ADC_CHAN(1, IIO_VOLTAGE, "LRADC1"),
+ MXS_ADC_CHAN(2, IIO_VOLTAGE, "LRADC2"),
+ MXS_ADC_CHAN(3, IIO_VOLTAGE, "LRADC3"),
+ MXS_ADC_CHAN(4, IIO_VOLTAGE, "LRADC4"),
+ MXS_ADC_CHAN(5, IIO_VOLTAGE, "LRADC5"),
+ MXS_ADC_CHAN(6, IIO_VOLTAGE, "LRADC6"),
+ MXS_ADC_CHAN(7, IIO_VOLTAGE, "VBATT"),
/* Combined Temperature sensors */
{
.type = IIO_TEMP,
BIT(IIO_CHAN_INFO_SCALE),
.channel = 8,
.scan_type = {.sign = 'u', .realbits = 18, .storagebits = 32,},
+ .datasheet_name = "TEMP_DIE",
},
/* Hidden channel to keep indexes */
{
.scan_index = -1,
.channel = 9,
},
- MXS_ADC_CHAN(10, IIO_VOLTAGE), /* VDDIO */
- MXS_ADC_CHAN(11, IIO_VOLTAGE), /* VTH */
- MXS_ADC_CHAN(12, IIO_VOLTAGE), /* VDDA */
- MXS_ADC_CHAN(13, IIO_VOLTAGE), /* VDDD */
- MXS_ADC_CHAN(14, IIO_VOLTAGE), /* VBG */
- MXS_ADC_CHAN(15, IIO_VOLTAGE), /* VDD5V */
+ MXS_ADC_CHAN(10, IIO_VOLTAGE, "VDDIO"),
+ MXS_ADC_CHAN(11, IIO_VOLTAGE, "VTH"),
+ MXS_ADC_CHAN(12, IIO_VOLTAGE, "VDDA"),
+ MXS_ADC_CHAN(13, IIO_VOLTAGE, "VDDD"),
+ MXS_ADC_CHAN(14, IIO_VOLTAGE, "VBG"),
+ MXS_ADC_CHAN(15, IIO_VOLTAGE, "VDD5V"),
};
static int mxs_lradc_hw_init(struct mxs_lradc *lradc)
{
/* The ADC always uses DELAY CHANNEL 0. */
- const uint32_t adc_cfg =
+ const u32 adc_cfg =
(1 << (LRADC_DELAY_TRIGGER_DELAYS_OFFSET + 0)) |
(LRADC_DELAY_TIMER_PER << LRADC_DELAY_DELAY_OFFSET);
/* Configure the touchscreen type */
if (lradc->soc == IMX28_LRADC) {
mxs_lradc_reg_clear(lradc, LRADC_CTRL0_MX28_TOUCH_SCREEN_TYPE,
- LRADC_CTRL0);
+ LRADC_CTRL0);
if (lradc->use_touchscreen == MXS_LRADC_TOUCHSCREEN_5WIRE)
mxs_lradc_reg_set(lradc, LRADC_CTRL0_MX28_TOUCH_SCREEN_TYPE,
- LRADC_CTRL0);
+ LRADC_CTRL0);
}
/* Start internal temperature sensing. */
MODULE_DEVICE_TABLE(of, mxs_lradc_dt_ids);
static int mxs_lradc_probe_touchscreen(struct mxs_lradc *lradc,
- struct device_node *lradc_node)
+ struct device_node *lradc_node)
{
int ret;
u32 ts_wires = 0, adapt;
ret = of_property_read_u32(lradc_node, "fsl,lradc-touchscreen-wires",
- &ts_wires);
+ &ts_wires);
if (ret)
return -ENODEV; /* touchscreen feature disabled */
struct resource *iores;
int ret = 0, touch_ret;
int i, s;
- uint64_t scale_uv;
+ u64 scale_uv;
/* Allocate the IIO device. */
iio = devm_iio_device_alloc(dev, sizeof(*lradc));
}
ret = devm_request_irq(dev, lradc->irq[i],
- mxs_lradc_handle_irq, 0,
- of_cfg->irq_name[i], iio);
+ mxs_lradc_handle_irq, 0,
+ of_cfg->irq_name[i], iio);
if (ret)
goto err_clk;
}
iio->dev.parent = &pdev->dev;
iio->info = &mxs_lradc_iio_info;
iio->modes = INDIO_DIRECT_MODE;
- iio->channels = mxs_lradc_chan_spec;
- iio->num_channels = ARRAY_SIZE(mxs_lradc_chan_spec);
iio->masklength = LRADC_MAX_TOTAL_CHANS;
+ if (lradc->soc == IMX23_LRADC) {
+ iio->channels = mx23_lradc_chan_spec;
+ iio->num_channels = ARRAY_SIZE(mx23_lradc_chan_spec);
+ } else {
+ iio->channels = mx28_lradc_chan_spec;
+ iio->num_channels = ARRAY_SIZE(mx28_lradc_chan_spec);
+ }
+
ret = iio_triggered_buffer_setup(iio, &iio_pollfunc_store_time,
- &mxs_lradc_trigger_handler,
- &mxs_lradc_buffer_ops);
+ &mxs_lradc_trigger_handler,
+ &mxs_lradc_buffer_ops);
if (ret)
goto err_clk;
module_platform_driver(mxs_lradc_driver);
MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
-MODULE_DESCRIPTION("Freescale i.MX28 LRADC driver");
+MODULE_DESCRIPTION("Freescale MXS LRADC driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" DRIVER_NAME);
Code Review / kvmfornfv.git / blobdiff