diff options
Diffstat (limited to 'drivers/staging/iio/adc/mxs-lradc.c')
| -rw-r--r-- | drivers/staging/iio/adc/mxs-lradc.c | 122 |
1 files changed, 81 insertions, 41 deletions
diff --git a/drivers/staging/iio/adc/mxs-lradc.c b/drivers/staging/iio/adc/mxs-lradc.c index d7c5223f1c3e..3f7715c9968b 100644 --- a/drivers/staging/iio/adc/mxs-lradc.c +++ b/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 @@ -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; @@ -812,7 +808,7 @@ 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. @@ -1369,7 +1365,7 @@ 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 +1378,18 @@ 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, @@ -1403,6 +1400,7 @@ 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 */ { @@ -1411,12 +1409,48 @@ 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, 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, + .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, "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) @@ -1612,10 +1646,16 @@ 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); @@ -1707,6 +1747,6 @@ 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); |