[parent not found: <1394472329-15485-1-git-send-email-sre-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>]
* [PATCHv3 1/9] mfd: twl4030-madc: Use managed resources
[not found] ` <1394472329-15485-1-git-send-email-sre-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
@ 2014-03-10 17:25 ` Sebastian Reichel
[not found] ` <1394472329-15485-2-git-send-email-sre-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2014-03-10 17:25 ` [PATCHv3 4/9] mfd: twl-core: Add twl_i2c_read/write_u16 Sebastian Reichel
1 sibling, 1 reply; 16+ messages in thread
From: Sebastian Reichel @ 2014-03-10 17:25 UTC (permalink / raw)
To: Sebastian Reichel, Marek Belisko, Jonathan Cameron
Cc: Lee Jones, Samuel Ortiz, Lars-Peter Clausen, Rob Herring,
Pawel Moll, Mark Rutland, Ian Campbell, Kumar Gala, Grant Likely,
linux-kernel-u79uwXL29TY76Z2rM5mHXA,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-iio-u79uwXL29TY76Z2rM5mHXA, Sebastian Reichel
Update twl4030-madc driver to use managed resources.
Signed-off-by: Sebastian Reichel <sre-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
Acked-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Tested-by: Marek Belisko <marek-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>
---
drivers/mfd/twl4030-madc.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)
diff --git a/drivers/mfd/twl4030-madc.c b/drivers/mfd/twl4030-madc.c
index 4c583e4..5458561 100644
--- a/drivers/mfd/twl4030-madc.c
+++ b/drivers/mfd/twl4030-madc.c
@@ -702,14 +702,14 @@ static int twl4030_madc_probe(struct platform_device *pdev)
{
struct twl4030_madc_data *madc;
struct twl4030_madc_platform_data *pdata = dev_get_platdata(&pdev->dev);
- int ret;
+ int irq, ret;
u8 regval;
if (!pdata) {
dev_err(&pdev->dev, "platform_data not available\n");
return -EINVAL;
}
- madc = kzalloc(sizeof(*madc), GFP_KERNEL);
+ madc = devm_kzalloc(&pdev->dev, sizeof(*madc), GFP_KERNEL);
if (!madc)
return -ENOMEM;
@@ -726,7 +726,7 @@ static int twl4030_madc_probe(struct platform_device *pdev)
TWL4030_MADC_ISR1 : TWL4030_MADC_ISR2;
ret = twl4030_madc_set_power(madc, 1);
if (ret < 0)
- goto err_power;
+ return ret;
ret = twl4030_madc_set_current_generator(madc, 0, 1);
if (ret < 0)
goto err_current_generator;
@@ -770,7 +770,9 @@ static int twl4030_madc_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, madc);
mutex_init(&madc->lock);
- ret = request_threaded_irq(platform_get_irq(pdev, 0), NULL,
+
+ irq = platform_get_irq(pdev, 0);
+ ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
twl4030_madc_threaded_irq_handler,
IRQF_TRIGGER_RISING, "twl4030_madc", madc);
if (ret) {
@@ -783,9 +785,6 @@ err_i2c:
twl4030_madc_set_current_generator(madc, 0, 0);
err_current_generator:
twl4030_madc_set_power(madc, 0);
-err_power:
- kfree(madc);
-
return ret;
}
@@ -793,10 +792,8 @@ static int twl4030_madc_remove(struct platform_device *pdev)
{
struct twl4030_madc_data *madc = platform_get_drvdata(pdev);
- free_irq(platform_get_irq(pdev, 0), madc);
twl4030_madc_set_current_generator(madc, 0, 0);
twl4030_madc_set_power(madc, 0);
- kfree(madc);
return 0;
}
--
1.9.0
^ permalink raw reply related [flat|nested] 16+ messages in thread* [PATCHv3 4/9] mfd: twl-core: Add twl_i2c_read/write_u16
[not found] ` <1394472329-15485-1-git-send-email-sre-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2014-03-10 17:25 ` [PATCHv3 1/9] mfd: twl4030-madc: Use managed resources Sebastian Reichel
@ 2014-03-10 17:25 ` Sebastian Reichel
1 sibling, 0 replies; 16+ messages in thread
From: Sebastian Reichel @ 2014-03-10 17:25 UTC (permalink / raw)
To: Sebastian Reichel, Marek Belisko, Jonathan Cameron
Cc: Lee Jones, Samuel Ortiz, Lars-Peter Clausen, Rob Herring,
Pawel Moll, Mark Rutland, Ian Campbell, Kumar Gala, Grant Likely,
linux-kernel-u79uwXL29TY76Z2rM5mHXA,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-iio-u79uwXL29TY76Z2rM5mHXA, Sebastian Reichel
Add a simple twl_i2c_read/write_u16 wrapper over
the twl_i2c_read/write, which is similar to the
twl_i2c_read/write_u8 wrapper.
Signed-off-by: Sebastian Reichel <sre-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
Acked-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Acked-by: Jonathan Cameron <jic23-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Tested-by: Marek Belisko <marek-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>
---
include/linux/i2c/twl.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h
index ade1c06..d2b1670 100644
--- a/include/linux/i2c/twl.h
+++ b/include/linux/i2c/twl.h
@@ -195,6 +195,18 @@ static inline int twl_i2c_read_u8(u8 mod_no, u8 *val, u8 reg) {
return twl_i2c_read(mod_no, val, reg, 1);
}
+static inline int twl_i2c_write_u16(u8 mod_no, u16 val, u8 reg) {
+ val = cpu_to_le16(val);
+ return twl_i2c_write(mod_no, (u8*) &val, reg, 2);
+}
+
+static inline int twl_i2c_read_u16(u8 mod_no, u16 *val, u8 reg) {
+ int ret;
+ ret = twl_i2c_read(mod_no, (u8*) val, reg, 2);
+ *val = le16_to_cpu(*val);
+ return ret;
+}
+
int twl_get_type(void);
int twl_get_version(void);
int twl_get_hfclk_rate(void);
--
1.9.0
--
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^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCHv3 2/9] mfd: twl4030-madc: Add DT support and convert to IIO framework
2014-03-10 17:25 [PATCHv3 0/9] Convert twl4030-madc to IIO API and add DT support Sebastian Reichel
[not found] ` <1394472329-15485-1-git-send-email-sre-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
@ 2014-03-10 17:25 ` Sebastian Reichel
[not found] ` <1394472329-15485-3-git-send-email-sre-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2014-03-10 17:25 ` [PATCHv3 3/9] mfd: twl4030-madc: Cleanup driver Sebastian Reichel
` (5 subsequent siblings)
7 siblings, 1 reply; 16+ messages in thread
From: Sebastian Reichel @ 2014-03-10 17:25 UTC (permalink / raw)
To: Sebastian Reichel, Marek Belisko, Jonathan Cameron
Cc: Lee Jones, Samuel Ortiz, Lars-Peter Clausen, Rob Herring,
Pawel Moll, Mark Rutland, Ian Campbell, Kumar Gala, Grant Likely,
linux-kernel, devicetree, linux-iio, Sebastian Reichel
This converts twl4030-madc module to use the Industrial IO ADC
framework and adds device tree support.
Signed-off-by: Sebastian Reichel <sre@debian.org>
Tested-by: Marek Belisko <marek@goldelico.com>
---
drivers/mfd/twl4030-madc.c | 127 +++++++++++++++++++++++++++++++++++++++++----
1 file changed, 116 insertions(+), 11 deletions(-)
diff --git a/drivers/mfd/twl4030-madc.c b/drivers/mfd/twl4030-madc.c
index 5458561..1c5c4db 100644
--- a/drivers/mfd/twl4030-madc.c
+++ b/drivers/mfd/twl4030-madc.c
@@ -47,11 +47,14 @@
#include <linux/gfp.h>
#include <linux/err.h>
+#include <linux/iio/iio.h>
+
/*
* struct twl4030_madc_data - a container for madc info
* @dev - pointer to device structure for madc
* @lock - mutex protecting this data structure
* @requests - Array of request struct corresponding to SW1, SW2 and RT
+ * @use_second_irq - IRQ selection (main or co-processor)
* @imr - Interrupt mask register of MADC
* @isr - Interrupt status register of MADC
*/
@@ -59,10 +62,71 @@ struct twl4030_madc_data {
struct device *dev;
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;
};
+static int twl4030_madc_read(struct iio_dev *iio_dev,
+ const struct iio_chan_spec *chan,
+ int *val, int *val2, long mask)
+{
+ struct twl4030_madc_data *madc = iio_priv(iio_dev);
+ struct twl4030_madc_request req;
+ int ret;
+
+ req.method = madc->use_second_irq ? TWL4030_MADC_SW2 : TWL4030_MADC_SW1;
+
+ req.channels = BIT(chan->channel);
+ req.active = false;
+ req.func_cb = NULL;
+ req.type = TWL4030_MADC_WAIT;
+ req.raw = !(mask == IIO_CHAN_INFO_PROCESSED);
+ req.do_avg = (mask == IIO_CHAN_INFO_AVERAGE_RAW);
+
+ ret = twl4030_madc_conversion(&req);
+ if (ret < 0)
+ return ret;
+
+ *val = req.rbuf[chan->channel];
+
+ return IIO_VAL_INT;
+}
+
+static const struct iio_info twl4030_madc_iio_info = {
+ .read_raw = &twl4030_madc_read,
+ .driver_module = THIS_MODULE,
+};
+
+#define TWL4030_ADC_CHANNEL(_channel, _type, _name) { \
+ .type = _type, \
+ .channel = _channel, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_AVERAGE_RAW) | \
+ BIT(IIO_CHAN_INFO_PROCESSED), \
+ .datasheet_name = _name, \
+ .indexed = 1, \
+}
+
+static const struct iio_chan_spec twl4030_madc_iio_channels[] = {
+ TWL4030_ADC_CHANNEL(0, IIO_VOLTAGE, "ADCIN0"),
+ TWL4030_ADC_CHANNEL(1, IIO_TEMP, "ADCIN1"),
+ TWL4030_ADC_CHANNEL(2, IIO_VOLTAGE, "ADCIN2"),
+ TWL4030_ADC_CHANNEL(3, IIO_VOLTAGE, "ADCIN3"),
+ TWL4030_ADC_CHANNEL(4, IIO_VOLTAGE, "ADCIN4"),
+ TWL4030_ADC_CHANNEL(5, IIO_VOLTAGE, "ADCIN5"),
+ TWL4030_ADC_CHANNEL(6, IIO_VOLTAGE, "ADCIN6"),
+ TWL4030_ADC_CHANNEL(7, IIO_VOLTAGE, "ADCIN7"),
+ TWL4030_ADC_CHANNEL(8, IIO_VOLTAGE, "ADCIN8"),
+ TWL4030_ADC_CHANNEL(9, IIO_VOLTAGE, "ADCIN9"),
+ TWL4030_ADC_CHANNEL(10, IIO_CURRENT, "ADCIN10"),
+ TWL4030_ADC_CHANNEL(11, IIO_VOLTAGE, "ADCIN11"),
+ TWL4030_ADC_CHANNEL(12, IIO_VOLTAGE, "ADCIN12"),
+ TWL4030_ADC_CHANNEL(13, IIO_VOLTAGE, "ADCIN13"),
+ TWL4030_ADC_CHANNEL(14, IIO_VOLTAGE, "ADCIN14"),
+ TWL4030_ADC_CHANNEL(15, IIO_VOLTAGE, "ADCIN15"),
+};
+
static struct twl4030_madc_data *twl4030_madc;
struct twl4030_prescale_divider_ratios {
@@ -702,28 +766,49 @@ static int twl4030_madc_probe(struct platform_device *pdev)
{
struct twl4030_madc_data *madc;
struct twl4030_madc_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct device_node *np = pdev->dev.of_node;
int irq, ret;
u8 regval;
+ struct iio_dev *iio_dev = NULL;
- if (!pdata) {
- dev_err(&pdev->dev, "platform_data not available\n");
+ if (!pdata && !np) {
+ dev_err(&pdev->dev, "neither platform data nor Device Tree node available\n");
return -EINVAL;
}
- madc = devm_kzalloc(&pdev->dev, sizeof(*madc), GFP_KERNEL);
- if (!madc)
+
+ iio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*madc));
+ if (!iio_dev) {
+ dev_err(&pdev->dev, "failed allocating iio device\n");
return -ENOMEM;
+ }
+ madc = iio_priv(iio_dev);
madc->dev = &pdev->dev;
+ iio_dev->name = dev_name(&pdev->dev);
+ iio_dev->dev.parent = &pdev->dev;
+ iio_dev->dev.of_node = pdev->dev.of_node;
+ iio_dev->info = &twl4030_madc_iio_info;
+ iio_dev->modes = INDIO_DIRECT_MODE;
+ iio_dev->channels = twl4030_madc_iio_channels;
+ iio_dev->num_channels = ARRAY_SIZE(twl4030_madc_iio_channels);
+
/*
* Phoenix provides 2 interrupt lines. The first one is connected to
* the OMAP. The other one can be connected to the other processor such
* as modem. Hence two separate ISR and IMR registers.
*/
- madc->imr = (pdata->irq_line == 1) ?
- TWL4030_MADC_IMR1 : TWL4030_MADC_IMR2;
- madc->isr = (pdata->irq_line == 1) ?
- TWL4030_MADC_ISR1 : TWL4030_MADC_ISR2;
+ if (pdata)
+ madc->use_second_irq = (pdata->irq_line != 1);
+ else
+ madc->use_second_irq = of_property_read_bool(np,
+ "ti,system-uses-second-madc-irq");
+
+ madc->imr = madc->use_second_irq ? TWL4030_MADC_IMR2 :
+ TWL4030_MADC_IMR1;
+ madc->isr = madc->use_second_irq ? TWL4030_MADC_ISR2 :
+ TWL4030_MADC_ISR1;
+
ret = twl4030_madc_set_power(madc, 1);
if (ret < 0)
return ret;
@@ -768,7 +853,7 @@ static int twl4030_madc_probe(struct platform_device *pdev)
}
}
- platform_set_drvdata(pdev, madc);
+ platform_set_drvdata(pdev, iio_dev);
mutex_init(&madc->lock);
irq = platform_get_irq(pdev, 0);
@@ -776,11 +861,19 @@ static int twl4030_madc_probe(struct platform_device *pdev)
twl4030_madc_threaded_irq_handler,
IRQF_TRIGGER_RISING, "twl4030_madc", madc);
if (ret) {
- dev_dbg(&pdev->dev, "could not request irq\n");
+ dev_err(&pdev->dev, "could not request irq\n");
goto err_i2c;
}
twl4030_madc = madc;
+
+ ret = iio_device_register(iio_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "could not register iio device\n");
+ goto err_i2c;
+ }
+
return 0;
+
err_i2c:
twl4030_madc_set_current_generator(madc, 0, 0);
err_current_generator:
@@ -790,20 +883,32 @@ err_current_generator:
static int twl4030_madc_remove(struct platform_device *pdev)
{
- struct twl4030_madc_data *madc = platform_get_drvdata(pdev);
+ struct iio_dev *iio_dev = platform_get_drvdata(pdev);
+ struct twl4030_madc_data *madc = iio_priv(iio_dev);
twl4030_madc_set_current_generator(madc, 0, 0);
twl4030_madc_set_power(madc, 0);
+ iio_device_unregister(iio_dev);
+
return 0;
}
+#ifdef CONFIG_OF
+static const struct of_device_id twl_madc_of_match[] = {
+ { .compatible = "ti,twl4030-madc", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, twl_madc_of_match);
+#endif
+
static struct platform_driver twl4030_madc_driver = {
.probe = twl4030_madc_probe,
.remove = twl4030_madc_remove,
.driver = {
.name = "twl4030_madc",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(twl_madc_of_match),
},
};
--
1.9.0
^ permalink raw reply related [flat|nested] 16+ messages in thread* [PATCHv3 3/9] mfd: twl4030-madc: Cleanup driver
2014-03-10 17:25 [PATCHv3 0/9] Convert twl4030-madc to IIO API and add DT support Sebastian Reichel
[not found] ` <1394472329-15485-1-git-send-email-sre-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2014-03-10 17:25 ` [PATCHv3 2/9] mfd: twl4030-madc: Add DT support and convert to IIO framework Sebastian Reichel
@ 2014-03-10 17:25 ` Sebastian Reichel
[not found] ` <1394472329-15485-4-git-send-email-sre-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2014-03-10 17:25 ` [PATCHv3 5/9] mfd: twl4030-madc: Use twl_i2c_read/write_u16 for 16 bit registers Sebastian Reichel
` (4 subsequent siblings)
7 siblings, 1 reply; 16+ messages in thread
From: Sebastian Reichel @ 2014-03-10 17:25 UTC (permalink / raw)
To: Sebastian Reichel, Marek Belisko, Jonathan Cameron
Cc: Lee Jones, Samuel Ortiz, Lars-Peter Clausen, Rob Herring,
Pawel Moll, Mark Rutland, Ian Campbell, Kumar Gala, Grant Likely,
linux-kernel, devicetree, linux-iio, Sebastian Reichel
Some style fixes in twl4030-madc driver.
Reported-by: Jonathan Cameron <jic23@kernel.org>
Reported-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Sebastian Reichel <sre@debian.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Tested-by: Marek Belisko <marek@goldelico.com>
---
drivers/mfd/twl4030-madc.c | 127 +++++++++++++++++++--------------------
include/linux/i2c/twl4030-madc.h | 2 +-
2 files changed, 62 insertions(+), 67 deletions(-)
diff --git a/drivers/mfd/twl4030-madc.c b/drivers/mfd/twl4030-madc.c
index 1c5c4db..890d520 100644
--- a/drivers/mfd/twl4030-madc.c
+++ b/drivers/mfd/twl4030-madc.c
@@ -49,22 +49,22 @@
#include <linux/iio/iio.h>
-/*
+/**
* struct twl4030_madc_data - a container for madc info
- * @dev - pointer to device structure for madc
- * @lock - mutex protecting this data structure
- * @requests - Array of request struct corresponding to SW1, SW2 and RT
- * @use_second_irq - IRQ selection (main or co-processor)
- * @imr - Interrupt mask register of MADC
- * @isr - Interrupt status register of MADC
+ * @dev: Pointer to device structure for madc
+ * @lock: Mutex protecting this data structure
+ * @requests: Array of request struct corresponding to SW1, SW2 and RT
+ * @use_second_irq: IRQ selection (main or co-processor)
+ * @imr: Interrupt mask register of MADC
+ * @isr: Interrupt status register of MADC
*/
struct twl4030_madc_data {
struct device *dev;
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,
@@ -155,17 +155,16 @@ twl4030_divider_ratios[16] = {
};
-/*
- * Conversion table from -3 to 55 degree Celcius
- */
-static int therm_tbl[] = {
-30800, 29500, 28300, 27100,
-26000, 24900, 23900, 22900, 22000, 21100, 20300, 19400, 18700, 17900,
-17200, 16500, 15900, 15300, 14700, 14100, 13600, 13100, 12600, 12100,
-11600, 11200, 10800, 10400, 10000, 9630, 9280, 8950, 8620, 8310,
-8020, 7730, 7460, 7200, 6950, 6710, 6470, 6250, 6040, 5830,
-5640, 5450, 5260, 5090, 4920, 4760, 4600, 4450, 4310, 4170,
-4040, 3910, 3790, 3670, 3550
+/* Conversion table from -3 to 55 degrees Celcius */
+static int twl4030_therm_tbl[] = {
+ 30800, 29500, 28300, 27100,
+ 26000, 24900, 23900, 22900, 22000, 21100, 20300, 19400, 18700,
+ 17900, 17200, 16500, 15900, 15300, 14700, 14100, 13600, 13100,
+ 12600, 12100, 11600, 11200, 10800, 10400, 10000, 9630, 9280,
+ 8950, 8620, 8310, 8020, 7730, 7460, 7200, 6950, 6710,
+ 6470, 6250, 6040, 5830, 5640, 5450, 5260, 5090, 4920,
+ 4760, 4600, 4450, 4310, 4170, 4040, 3910, 3790, 3670,
+ 3550
};
/*
@@ -197,11 +196,12 @@ const struct twl4030_madc_conversion_method twl4030_conversion_methods[] = {
},
};
-/*
- * Function to read a particular channel value.
- * @madc - pointer to struct twl4030_madc_data
- * @reg - lsb of ADC Channel
- * If the i2c read fails it returns an error else returns 0.
+/**
+ * twl4030_madc_channel_raw_read() - Function to read a particular channel value
+ * @madc: pointer to struct twl4030_madc_data
+ * @reg: lsb of ADC Channel
+ *
+ * Return: 0 on success, an error code otherwise.
*/
static int twl4030_madc_channel_raw_read(struct twl4030_madc_data *madc, u8 reg)
{
@@ -227,7 +227,7 @@ static int twl4030_madc_channel_raw_read(struct twl4030_madc_data *madc, u8 reg)
}
/*
- * Return battery temperature
+ * Return battery temperature in degrees Celsius
* Or < 0 on failure.
*/
static int twl4030battery_temperature(int raw_volt)
@@ -236,18 +236,18 @@ static int twl4030battery_temperature(int raw_volt)
int temp, curr, volt, res, ret;
volt = (raw_volt * TEMP_STEP_SIZE) / TEMP_PSR_R;
- /* Getting and calculating the supply current in micro ampers */
+ /* Getting and calculating the supply current in micro amperes */
ret = twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, &val,
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];
-
+ int actual = twl4030_therm_tbl[temp];
if ((actual - res) >= 0)
break;
}
@@ -269,11 +269,12 @@ 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
* @reg_base - Base address of the first channel
- * @Channels - 16 bit bitmap. If the bit is set, channel value is read
+ * @Channels - 16 bit bitmap. If the bit is set, channel's value is read
* @buf - The channel values are stored here. if read fails error
* @raw - Return raw values without conversion
* value is stored
@@ -284,17 +285,17 @@ static int twl4030_madc_read_channels(struct twl4030_madc_data *madc,
long channels, int *buf,
bool raw)
{
- int count = 0, count_req = 0, i;
+ int count = 0;
+ int i;
u8 reg;
for_each_set_bit(i, &channels, TWL4030_MADC_MAX_CHANNELS) {
- reg = reg_base + 2 * i;
+ reg = reg_base + (2 * i);
buf[i] = twl4030_madc_channel_raw_read(madc, reg);
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);
+ return buf[i];
}
if (raw) {
count++;
@@ -305,7 +306,7 @@ 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;
@@ -315,7 +316,7 @@ 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++;
@@ -336,8 +337,6 @@ 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;
}
@@ -361,13 +360,13 @@ 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;
@@ -430,7 +429,7 @@ static irqreturn_t twl4030_madc_threaded_irq_handler(int irq, void *_madc)
continue;
ret = twl4030_madc_disable_irq(madc, i);
if (ret < 0)
- dev_dbg(madc->dev, "Disable interrupt failed%d\n", i);
+ dev_dbg(madc->dev, "Disable interrupt failed %d\n", i);
madc->requests[i].result_pending = 1;
}
for (i = 0; i < TWL4030_MADC_NUM_METHODS; i++) {
@@ -512,21 +511,17 @@ 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;
@@ -623,8 +618,8 @@ int twl4030_madc_conversion(struct twl4030_madc_request *req)
ch_lsb, method->avg);
if (ret) {
dev_err(twl4030_madc->dev,
- "unable to write sel reg 0x%X\n",
- method->sel + 1);
+ "unable to write avg reg 0x%X\n",
+ method->avg);
goto out;
}
}
@@ -665,10 +660,6 @@ 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;
@@ -703,6 +694,7 @@ 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,
@@ -712,10 +704,13 @@ static int twl4030_madc_set_current_generator(struct twl4030_madc_data *madc,
TWL4030_BCI_BCICTL1);
return ret;
}
+
+ regmask = chan ? TWL4030_BCI_ITHEN : TWL4030_BCI_TYPEN;
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) {
@@ -730,7 +725,7 @@ static int twl4030_madc_set_current_generator(struct twl4030_madc_data *madc,
/*
* Function that sets MADC software power on bit to enable MADC
* @madc - pointer to twl4030_madc_data struct
- * @on - Enable or disable MADC software powen on bit.
+ * @on - Enable or disable MADC software power on bit.
* returns error if i2c read/write fails else 0
*/
static int twl4030_madc_set_power(struct twl4030_madc_data *madc, int on)
@@ -909,7 +904,7 @@ static struct platform_driver twl4030_madc_driver = {
.name = "twl4030_madc",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(twl_madc_of_match),
- },
+ },
};
module_platform_driver(twl4030_madc_driver);
diff --git a/include/linux/i2c/twl4030-madc.h b/include/linux/i2c/twl4030-madc.h
index 01f5951..1c0134d 100644
--- a/include/linux/i2c/twl4030-madc.h
+++ b/include/linux/i2c/twl4030-madc.h
@@ -44,7 +44,7 @@ struct twl4030_madc_conversion_method {
struct twl4030_madc_request {
unsigned long channels;
- u16 do_avg;
+ bool do_avg;
u16 method;
u16 type;
bool active;
--
1.9.0
^ permalink raw reply related [flat|nested] 16+ messages in thread* [PATCHv3 5/9] mfd: twl4030-madc: Use twl_i2c_read/write_u16 for 16 bit registers
2014-03-10 17:25 [PATCHv3 0/9] Convert twl4030-madc to IIO API and add DT support Sebastian Reichel
` (2 preceding siblings ...)
2014-03-10 17:25 ` [PATCHv3 3/9] mfd: twl4030-madc: Cleanup driver Sebastian Reichel
@ 2014-03-10 17:25 ` Sebastian Reichel
2014-03-10 17:25 ` [PATCHv3 6/9] Documentation: DT: Document twl4030-madc binding Sebastian Reichel
` (3 subsequent siblings)
7 siblings, 0 replies; 16+ messages in thread
From: Sebastian Reichel @ 2014-03-10 17:25 UTC (permalink / raw)
To: Sebastian Reichel, Marek Belisko, Jonathan Cameron
Cc: Lee Jones, Samuel Ortiz, Lars-Peter Clausen, Rob Herring,
Pawel Moll, Mark Rutland, Ian Campbell, Kumar Gala, Grant Likely,
linux-kernel, devicetree, linux-iio, Sebastian Reichel
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@debian.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Tested-by: Marek Belisko <marek@goldelico.com>
---
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 890d520..ccfb10d 100644
--- a/drivers/mfd/twl4030-madc.c
+++ b/drivers/mfd/twl4030-madc.c
@@ -205,25 +205,19 @@ 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);
}
/*
@@ -572,7 +566,6 @@ 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)
@@ -588,37 +581,21 @@ 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;
}
--
1.9.0
^ permalink raw reply related [flat|nested] 16+ messages in thread* [PATCHv3 6/9] Documentation: DT: Document twl4030-madc binding
2014-03-10 17:25 [PATCHv3 0/9] Convert twl4030-madc to IIO API and add DT support Sebastian Reichel
` (3 preceding siblings ...)
2014-03-10 17:25 ` [PATCHv3 5/9] mfd: twl4030-madc: Use twl_i2c_read/write_u16 for 16 bit registers Sebastian Reichel
@ 2014-03-10 17:25 ` Sebastian Reichel
2014-03-10 17:25 ` [PATCHv3 7/9] mfd: twl4030-madc: Move driver to drivers/iio/adc Sebastian Reichel
` (2 subsequent siblings)
7 siblings, 0 replies; 16+ messages in thread
From: Sebastian Reichel @ 2014-03-10 17:25 UTC (permalink / raw)
To: Sebastian Reichel, Marek Belisko, Jonathan Cameron
Cc: Lee Jones, Samuel Ortiz, Lars-Peter Clausen, Rob Herring,
Pawel Moll, Mark Rutland, Ian Campbell, Kumar Gala, Grant Likely,
linux-kernel, devicetree, linux-iio, Sebastian Reichel
Add devicetree binding documentation for twl4030-madc
analog digital converter.
Signed-off-by: Sebastian Reichel <sre@debian.org>
---
.../devicetree/bindings/iio/adc/twl4030-madc.txt | 24 ++++++++++++++++++++++
1 file changed, 24 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/adc/twl4030-madc.txt
diff --git a/Documentation/devicetree/bindings/iio/adc/twl4030-madc.txt b/Documentation/devicetree/bindings/iio/adc/twl4030-madc.txt
new file mode 100644
index 0000000..6bdd214
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/twl4030-madc.txt
@@ -0,0 +1,24 @@
+* TWL4030 Monitoring Analog to Digital Converter (MADC)
+
+The MADC subsystem in the TWL4030 consists of a 10-bit ADC
+combined with a 16-input analog multiplexer.
+
+Required properties:
+ - compatible: Should contain "ti,twl4030-madc".
+ - interrupts: IRQ line for the MADC submodule.
+ - #io-channel-cells: Should be set to <1>.
+
+Optional properties:
+ - ti,system-uses-second-madc-irq: boolean, set if the second madc irq register
+ should be used, which is intended to be used
+ by Co-Processors (e.g. a modem).
+
+Example:
+
+&twl {
+ madc {
+ compatible = "ti,twl4030-madc";
+ interrupts = <3>;
+ #io-channel-cells = <1>;
+ };
+};
--
1.9.0
^ permalink raw reply related [flat|nested] 16+ messages in thread* [PATCHv3 7/9] mfd: twl4030-madc: Move driver to drivers/iio/adc
2014-03-10 17:25 [PATCHv3 0/9] Convert twl4030-madc to IIO API and add DT support Sebastian Reichel
` (4 preceding siblings ...)
2014-03-10 17:25 ` [PATCHv3 6/9] Documentation: DT: Document twl4030-madc binding Sebastian Reichel
@ 2014-03-10 17:25 ` Sebastian Reichel
2014-03-10 17:25 ` [PATCHv3 8/9] iio: documentation: Add ABI documentation for *_mean_raw Sebastian Reichel
2014-03-10 17:25 ` [PATCHv3 9/9] iio: inkern: add iio_read_channel_average_raw Sebastian Reichel
7 siblings, 0 replies; 16+ messages in thread
From: Sebastian Reichel @ 2014-03-10 17:25 UTC (permalink / raw)
To: Sebastian Reichel, Marek Belisko, Jonathan Cameron
Cc: Lee Jones, Samuel Ortiz, Lars-Peter Clausen, Rob Herring,
Pawel Moll, Mark Rutland, Ian Campbell, Kumar Gala, Grant Likely,
linux-kernel, devicetree, linux-iio, Sebastian Reichel
This is a driver for an A/D converter, which belongs into
drivers/iio/adc.
Signed-off-by: Sebastian Reichel <sre@debian.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Jonathan Cameron <jic23@kernel.org>
---
drivers/iio/adc/Kconfig | 10 ++++++++++
drivers/iio/adc/Makefile | 1 +
drivers/{mfd => iio/adc}/twl4030-madc.c | 0
drivers/mfd/Kconfig | 10 ----------
drivers/mfd/Makefile | 1 -
5 files changed, 11 insertions(+), 11 deletions(-)
rename drivers/{mfd => iio/adc}/twl4030-madc.c (100%)
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index 2209f28..427f75c 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -183,6 +183,16 @@ config TI_AM335X_ADC
Say yes here to build support for Texas Instruments ADC
driver which is also a MFD client.
+config TWL4030_MADC
+ tristate "TWL4030 MADC (Monitoring A/D Converter)"
+ depends on TWL4030_CORE
+ help
+ This driver provides support for Triton TWL4030-MADC. The
+ driver supports both RT and SW conversion methods.
+
+ This driver can also be built as a module. If so, the module will be
+ called twl4030-madc.
+
config TWL6030_GPADC
tristate "TWL6030 GPADC (General Purpose A/D Converter) Support"
depends on TWL4030_CORE
diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
index ba9a10a..9acf2df 100644
--- a/drivers/iio/adc/Makefile
+++ b/drivers/iio/adc/Makefile
@@ -20,5 +20,6 @@ obj-$(CONFIG_MCP3422) += mcp3422.o
obj-$(CONFIG_NAU7802) += nau7802.o
obj-$(CONFIG_TI_ADC081C) += ti-adc081c.o
obj-$(CONFIG_TI_AM335X_ADC) += ti_am335x_adc.o
+obj-$(CONFIG_TWL4030_MADC) += twl4030-madc.o
obj-$(CONFIG_TWL6030_GPADC) += twl6030-gpadc.o
obj-$(CONFIG_VIPERBOARD_ADC) += viperboard_adc.o
diff --git a/drivers/mfd/twl4030-madc.c b/drivers/iio/adc/twl4030-madc.c
similarity index 100%
rename from drivers/mfd/twl4030-madc.c
rename to drivers/iio/adc/twl4030-madc.c
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 49bb445..23a8a51 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -935,16 +935,6 @@ config TWL4030_CORE
high speed USB OTG transceiver, an audio codec (on most
versions) and many other features.
-config TWL4030_MADC
- tristate "TI TWL4030 MADC"
- depends on TWL4030_CORE
- help
- This driver provides support for triton TWL4030-MADC. The
- driver supports both RT and SW conversion methods.
-
- This driver can be built as a module. If so it will be
- named twl4030-madc
-
config TWL4030_POWER
bool "TI TWL4030 power resources"
depends on TWL4030_CORE && ARM
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 5aea5ef..c8eb0bc 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -71,7 +71,6 @@ obj-$(CONFIG_MFD_TPS80031) += tps80031.o
obj-$(CONFIG_MENELAUS) += menelaus.o
obj-$(CONFIG_TWL4030_CORE) += twl-core.o twl4030-irq.o twl6030-irq.o
-obj-$(CONFIG_TWL4030_MADC) += twl4030-madc.o
obj-$(CONFIG_TWL4030_POWER) += twl4030-power.o
obj-$(CONFIG_MFD_TWL4030_AUDIO) += twl4030-audio.o
obj-$(CONFIG_TWL6040_CORE) += twl6040.o
--
1.9.0
^ permalink raw reply related [flat|nested] 16+ messages in thread* [PATCHv3 8/9] iio: documentation: Add ABI documentation for *_mean_raw
2014-03-10 17:25 [PATCHv3 0/9] Convert twl4030-madc to IIO API and add DT support Sebastian Reichel
` (5 preceding siblings ...)
2014-03-10 17:25 ` [PATCHv3 7/9] mfd: twl4030-madc: Move driver to drivers/iio/adc Sebastian Reichel
@ 2014-03-10 17:25 ` Sebastian Reichel
[not found] ` <1394472329-15485-9-git-send-email-sre-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2014-03-10 17:25 ` [PATCHv3 9/9] iio: inkern: add iio_read_channel_average_raw Sebastian Reichel
7 siblings, 1 reply; 16+ messages in thread
From: Sebastian Reichel @ 2014-03-10 17:25 UTC (permalink / raw)
To: Sebastian Reichel, Marek Belisko, Jonathan Cameron
Cc: Lee Jones, Samuel Ortiz, Lars-Peter Clausen, Rob Herring,
Pawel Moll, Mark Rutland, Ian Campbell, Kumar Gala, Grant Likely,
linux-kernel, devicetree, linux-iio, Sebastian Reichel
Add ABI documentation for in_*_mean_raw files, which are
already supported and used in the kernel for some time.
Signed-off-by: Sebastian Reichel <sre@debian.org>
---
Documentation/ABI/testing/sysfs-bus-iio | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 6e02c50..58ba333 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -210,6 +210,14 @@ Contact: linux-iio@vger.kernel.org
Description:
Scaled humidity measurement in milli percent.
+What: /sys/bus/iio/devices/iio:deviceX/in_X_mean_raw
+KernelVersion: 3.5
+Contact: linux-iio@vger.kernel.org
+Description:
+ Averaged raw measurement from channel X. The number of values
+ used for averaging is device specific. The converting rules for
+ normal raw values also applies to the averaged raw values.
+
What: /sys/bus/iio/devices/iio:deviceX/in_accel_offset
What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_offset
What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_offset
--
1.9.0
^ permalink raw reply related [flat|nested] 16+ messages in thread* [PATCHv3 9/9] iio: inkern: add iio_read_channel_average_raw
2014-03-10 17:25 [PATCHv3 0/9] Convert twl4030-madc to IIO API and add DT support Sebastian Reichel
` (6 preceding siblings ...)
2014-03-10 17:25 ` [PATCHv3 8/9] iio: documentation: Add ABI documentation for *_mean_raw Sebastian Reichel
@ 2014-03-10 17:25 ` Sebastian Reichel
2014-03-15 15:42 ` Jonathan Cameron
7 siblings, 1 reply; 16+ messages in thread
From: Sebastian Reichel @ 2014-03-10 17:25 UTC (permalink / raw)
To: Sebastian Reichel, Marek Belisko, Jonathan Cameron
Cc: Lee Jones, Samuel Ortiz, Lars-Peter Clausen, Rob Herring,
Pawel Moll, Mark Rutland, Ian Campbell, Kumar Gala, Grant Likely,
linux-kernel, devicetree, linux-iio, Sebastian Reichel
Add iio_read_channel_average_raw to support reading
averaged raw values in consumer drivers.
Signed-off-by: Sebastian Reichel <sre@debian.org>
---
drivers/iio/inkern.c | 18 ++++++++++++++++++
include/linux/iio/consumer.h | 13 +++++++++++++
2 files changed, 31 insertions(+)
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index 0cf5f8e..adeba5a 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -443,6 +443,24 @@ err_unlock:
}
EXPORT_SYMBOL_GPL(iio_read_channel_raw);
+int iio_read_channel_average_raw(struct iio_channel *chan, int *val)
+{
+ int ret;
+
+ mutex_lock(&chan->indio_dev->info_exist_lock);
+ if (chan->indio_dev->info == NULL) {
+ ret = -ENODEV;
+ goto err_unlock;
+ }
+
+ ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_AVERAGE_RAW);
+err_unlock:
+ mutex_unlock(&chan->indio_dev->info_exist_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(iio_read_channel_average_raw);
+
static int iio_convert_raw_to_processed_unlocked(struct iio_channel *chan,
int raw, int *processed, unsigned int scale)
{
diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h
index 2752b1f..651f9a0 100644
--- a/include/linux/iio/consumer.h
+++ b/include/linux/iio/consumer.h
@@ -123,6 +123,19 @@ int iio_read_channel_raw(struct iio_channel *chan,
int *val);
/**
+ * iio_read_channel_average_raw() - read from a given channel
+ * @chan: The channel being queried.
+ * @val: Value read back.
+ *
+ * Note raw reads from iio channels are in adc counts and hence
+ * scale will need to be applied if standard units required.
+ *
+ * In opposit to the normal iio_read_channel_raw this function
+ * returns the average of multiple reads.
+ */
+int iio_read_channel_average_raw(struct iio_channel *chan, int *val);
+
+/**
* iio_read_channel_processed() - read processed value from a given channel
* @chan: The channel being queried.
* @val: Value read back.
--
1.9.0
^ permalink raw reply related [flat|nested] 16+ messages in thread* Re: [PATCHv3 9/9] iio: inkern: add iio_read_channel_average_raw
2014-03-10 17:25 ` [PATCHv3 9/9] iio: inkern: add iio_read_channel_average_raw Sebastian Reichel
@ 2014-03-15 15:42 ` Jonathan Cameron
0 siblings, 0 replies; 16+ messages in thread
From: Jonathan Cameron @ 2014-03-15 15:42 UTC (permalink / raw)
To: Sebastian Reichel, Sebastian Reichel, Marek Belisko
Cc: Lee Jones, Samuel Ortiz, Lars-Peter Clausen, Rob Herring,
Pawel Moll, Mark Rutland, Ian Campbell, Kumar Gala, Grant Likely,
linux-kernel, devicetree, linux-iio
On 10/03/14 17:25, Sebastian Reichel wrote:
> Add iio_read_channel_average_raw to support reading
> averaged raw values in consumer drivers.
>
> Signed-off-by: Sebastian Reichel <sre@debian.org>
As this one also stands fine on it's own and isn't actually used
by the rest of the patch set - applied to the togreg branch of iio.git
This will get pushed out initially as 'testing' for the autobuilders
to play.
Jonathan
> ---
> drivers/iio/inkern.c | 18 ++++++++++++++++++
> include/linux/iio/consumer.h | 13 +++++++++++++
> 2 files changed, 31 insertions(+)
>
> diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
> index 0cf5f8e..adeba5a 100644
> --- a/drivers/iio/inkern.c
> +++ b/drivers/iio/inkern.c
> @@ -443,6 +443,24 @@ err_unlock:
> }
> EXPORT_SYMBOL_GPL(iio_read_channel_raw);
>
> +int iio_read_channel_average_raw(struct iio_channel *chan, int *val)
> +{
> + int ret;
> +
> + mutex_lock(&chan->indio_dev->info_exist_lock);
> + if (chan->indio_dev->info == NULL) {
> + ret = -ENODEV;
> + goto err_unlock;
> + }
> +
> + ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_AVERAGE_RAW);
> +err_unlock:
> + mutex_unlock(&chan->indio_dev->info_exist_lock);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(iio_read_channel_average_raw);
> +
> static int iio_convert_raw_to_processed_unlocked(struct iio_channel *chan,
> int raw, int *processed, unsigned int scale)
> {
> diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h
> index 2752b1f..651f9a0 100644
> --- a/include/linux/iio/consumer.h
> +++ b/include/linux/iio/consumer.h
> @@ -123,6 +123,19 @@ int iio_read_channel_raw(struct iio_channel *chan,
> int *val);
>
> /**
> + * iio_read_channel_average_raw() - read from a given channel
> + * @chan: The channel being queried.
> + * @val: Value read back.
> + *
> + * Note raw reads from iio channels are in adc counts and hence
> + * scale will need to be applied if standard units required.
> + *
> + * In opposit to the normal iio_read_channel_raw this function
> + * returns the average of multiple reads.
> + */
> +int iio_read_channel_average_raw(struct iio_channel *chan, int *val);
> +
> +/**
> * iio_read_channel_processed() - read processed value from a given channel
> * @chan: The channel being queried.
> * @val: Value read back.
>
^ permalink raw reply [flat|nested] 16+ messages in thread