diff options
Diffstat (limited to 'kernel/drivers/staging/iio/adc/mxs-lradc.c')
| -rw-r--r-- | kernel/drivers/staging/iio/adc/mxs-lradc.c | 316 |
1 files changed, 187 insertions, 129 deletions
diff --git a/kernel/drivers/staging/iio/adc/mxs-lradc.c b/kernel/drivers/staging/iio/adc/mxs-lradc.c index d7c5223f1..d997d9c74 100644 --- a/kernel/drivers/staging/iio/adc/mxs-lradc.c +++ b/kernel/drivers/staging/iio/adc/mxs-lradc.c @@ -1,5 +1,5 @@ /* - * Freescale i.MX28 LRADC driver + * Freescale MXS LRADC driver * * Copyright (c) 2012 DENX Software Engineering, GmbH. * Marek Vasut <marex@denx.de> @@ -15,34 +15,30 @@ * 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" @@ -65,14 +61,14 @@ * 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 @@ -112,12 +108,12 @@ static const char * const mx28_lradc_irq_names[] = { 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 */ @@ -136,7 +132,7 @@ static const uint32_t mx23_vref_mv[LRADC_MAX_TOTAL_CHANS] = { 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 */ @@ -202,14 +198,14 @@ struct mxs_lradc { 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; @@ -238,7 +234,7 @@ struct mxs_lradc { * 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. @@ -252,7 +248,7 @@ struct mxs_lradc { 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; @@ -429,7 +425,7 @@ static void mxs_lradc_map_channel(struct mxs_lradc *lradc, unsigned vch, 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); } @@ -444,8 +440,8 @@ static void mxs_lradc_setup_ts_channel(struct mxs_lradc *lradc, unsigned ch) * 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 @@ -462,10 +458,10 @@ static void mxs_lradc_setup_ts_channel(struct mxs_lradc *lradc, unsigned ch) * 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); @@ -475,12 +471,13 @@ static void mxs_lradc_setup_ts_channel(struct mxs_lradc *lradc, unsigned ch) * 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)); } /* @@ -490,7 +487,7 @@ static void mxs_lradc_setup_ts_channel(struct mxs_lradc *lradc, unsigned ch) * 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; @@ -515,12 +512,14 @@ static void mxs_lradc_setup_ts_pressure(struct mxs_lradc *lradc, unsigned ch1, 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); @@ -530,7 +529,8 @@ static void mxs_lradc_setup_ts_pressure(struct mxs_lradc *lradc, unsigned ch1, * 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 | @@ -538,7 +538,7 @@ static void mxs_lradc_setup_ts_pressure(struct mxs_lradc *lradc, unsigned ch1, } static unsigned mxs_lradc_read_raw_channel(struct mxs_lradc *lradc, - unsigned channel) + unsigned channel) { u32 reg; unsigned num_samples, val; @@ -554,7 +554,7 @@ static unsigned mxs_lradc_read_raw_channel(struct mxs_lradc *lradc, } 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; @@ -611,7 +611,7 @@ static void mxs_lradc_setup_touch_detection(struct mxs_lradc *lradc) */ 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); } /* @@ -679,7 +679,7 @@ static void mxs_lradc_prepare_pressure(struct mxs_lradc *lradc) 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) @@ -688,16 +688,18 @@ 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 @@ -724,12 +726,14 @@ static void mxs_lradc_complete_touch_event(struct mxs_lradc *lradc) */ 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)); } /* @@ -761,9 +765,11 @@ static void mxs_lradc_finish_touch_event(struct mxs_lradc *lradc, bool valid) 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); } @@ -775,25 +781,28 @@ static void mxs_lradc_handle_touch(struct mxs_lradc *lradc) 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; @@ -812,7 +821,7 @@ static int mxs_lradc_read_single(struct iio_dev *iio_dev, int chan, int *val) 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. @@ -830,20 +839,22 @@ static int mxs_lradc_read_single(struct iio_dev *iio_dev, int chan, int *val) */ 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)); @@ -889,8 +900,8 @@ static int mxs_lradc_read_temp(struct iio_dev *iio_dev, int *val) } 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); @@ -919,11 +930,12 @@ static int mxs_lradc_read_raw(struct iio_dev *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; } @@ -984,9 +996,9 @@ static int mxs_lradc_write_raw_get_fmt(struct iio_dev *iio_dev, } 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); @@ -1003,8 +1015,8 @@ static ssize_t mxs_lradc_show_scale_available_ch(struct device *dev, } 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); @@ -1142,8 +1154,8 @@ static irqreturn_t mxs_lradc_handle_irq(int irq, void *data) 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); @@ -1179,7 +1191,7 @@ static irqreturn_t mxs_lradc_trigger_handler(int irq, void *p) 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; @@ -1202,7 +1214,7 @@ static int mxs_lradc_configure_trigger(struct iio_trigger *trig, bool state) { 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); @@ -1221,7 +1233,7 @@ static int mxs_lradc_trigger_init(struct iio_dev *iio) 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; @@ -1252,10 +1264,10 @@ static int mxs_lradc_buffer_preenable(struct iio_dev *iio) 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); @@ -1278,7 +1290,8 @@ static int mxs_lradc_buffer_preenable(struct iio_dev *iio) } 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); @@ -1293,12 +1306,12 @@ static int mxs_lradc_buffer_preenable(struct iio_dev *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, 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; @@ -1312,11 +1325,12 @@ static int mxs_lradc_buffer_postdisable(struct iio_dev *iio) 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); @@ -1327,7 +1341,7 @@ static int mxs_lradc_buffer_postdisable(struct iio_dev *iio) } 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); @@ -1369,7 +1383,7 @@ static const struct iio_buffer_setup_ops mxs_lradc_buffer_ops = { * 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), \ @@ -1382,17 +1396,54 @@ static const struct iio_buffer_setup_ops mxs_lradc_buffer_ops = { .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, @@ -1403,6 +1454,7 @@ static const struct iio_chan_spec mxs_lradc_chan_spec[] = { BIT(IIO_CHAN_INFO_SCALE), .channel = 8, .scan_type = {.sign = 'u', .realbits = 18, .storagebits = 32,}, + .datasheet_name = "TEMP_DIE", }, /* Hidden channel to keep indexes */ { @@ -1411,18 +1463,18 @@ static const struct iio_chan_spec mxs_lradc_chan_spec[] = { .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); @@ -1442,11 +1494,11 @@ static int mxs_lradc_hw_init(struct mxs_lradc *lradc) /* 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. */ @@ -1473,13 +1525,13 @@ static const struct of_device_id mxs_lradc_dt_ids[] = { 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 */ @@ -1549,7 +1601,7 @@ static int mxs_lradc_probe(struct platform_device *pdev) 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)); @@ -1595,8 +1647,8 @@ static int mxs_lradc_probe(struct platform_device *pdev) } 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; } @@ -1612,13 +1664,19 @@ static int mxs_lradc_probe(struct platform_device *pdev) 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; @@ -1707,6 +1765,6 @@ static struct platform_driver mxs_lradc_driver = { 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); |