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mfd: Add manual ab8500-gpadc batt temp activation for AB8500 3.0 

In AB8500 3.0 the pull-up supplying the NTC must be manually activated.
Add enumerators to chip version detection logic.

Signed-off-by: Kalle Komierowski <karl.komierowski@stericsson.com>
Reviewed-by: Johan Palsson <johan.palsson@stericsson.com>
Reviewed-by: Daniel Willerud <daniel.willerud@stericsson.com>
Reviewed-by: Jonas Aberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Karl Komierowski 2011-05-08 00:55:31 +02:00 committed by Samuel Ortiz
parent 863dde5bfa
commit c9c9513fd0
1 changed files with 33 additions and 1 deletions
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34
drivers/mfd/ab8500-gpadc.c
View File

@ -57,6 +57,7 @@
#define SW_AVG_16 0x60
#define ADC_SW_CONV 0x04
#define EN_ICHAR 0x80
#define BATTEMP_PULLUP 0x04
#define EN_BUF 0x40
#define DIS_ZERO 0x00
#define GPADC_BUSY 0x01
@ -101,6 +102,7 @@ struct adc_cal_data {
/**
* struct ab8500_gpadc - AB8500 GPADC device information
* @chip_id ABB chip id
* @dev: pointer to the struct device
* @node: a list of AB8500 GPADCs, hence prepared for
reentrance
@ -112,6 +114,7 @@ struct adc_cal_data {
* @cal_data array of ADC calibration data structs
*/
struct ab8500_gpadc {
u8 chip_id;
struct device *dev;
struct list_head node;
struct completion ab8500_gpadc_complete;
@ -274,6 +277,7 @@ int ab8500_gpadc_convert(struct ab8500_gpadc *gpadc, u8 input)
dev_err(gpadc->dev, "gpadc_conversion: enable gpadc failed\n");
goto out;
}
/* Select the input source and set average samples to 16 */
ret = abx500_set_register_interruptible(gpadc->dev, AB8500_GPADC,
AB8500_GPADC_CTRL2_REG, (input | SW_AVG_16));
@ -282,9 +286,11 @@ int ab8500_gpadc_convert(struct ab8500_gpadc *gpadc, u8 input)
"gpadc_conversion: set avg samples failed\n");
goto out;
}
/*
* Enable ADC, buffering, select rising edge and enable ADC path
* charging current sense if it needed
* charging current sense if it needed, ABB 3.0 needs some special
* treatment too.
*/
switch (input) {
case MAIN_CHARGER_C:
@ -294,6 +300,23 @@ int ab8500_gpadc_convert(struct ab8500_gpadc *gpadc, u8 input)
EN_BUF | EN_ICHAR,
EN_BUF | EN_ICHAR);
break;
case BTEMP_BALL:
if (gpadc->chip_id >= AB8500_CUT3P0) {
/* Turn on btemp pull-up on ABB 3.0 */
ret = abx500_mask_and_set_register_interruptible(
gpadc->dev,
AB8500_GPADC, AB8500_GPADC_CTRL1_REG,
EN_BUF | BATTEMP_PULLUP,
EN_BUF | BATTEMP_PULLUP);
/*
* Delay might be needed for ABB8500 cut 3.0, if not, remove
* when hardware will be availible
*/
msleep(1);
break;
}
/* Intentional fallthrough */
default:
ret = abx500_mask_and_set_register_interruptible(gpadc->dev,
AB8500_GPADC, AB8500_GPADC_CTRL1_REG, EN_BUF, EN_BUF);
@ -304,6 +327,7 @@ int ab8500_gpadc_convert(struct ab8500_gpadc *gpadc, u8 input)
"gpadc_conversion: select falling edge failed\n");
goto out;
}
ret = abx500_mask_and_set_register_interruptible(gpadc->dev,
AB8500_GPADC, AB8500_GPADC_CTRL1_REG, ADC_SW_CONV, ADC_SW_CONV);
if (ret < 0) {
@ -552,6 +576,14 @@ static int __devinit ab8500_gpadc_probe(struct platform_device *pdev)
goto fail;
}
/* Get Chip ID of the ABB ASIC */
ret = abx500_get_chip_id(gpadc->dev);
if (ret < 0) {
dev_err(gpadc->dev, "failed to get chip ID\n");
goto fail_irq;
}
gpadc->chip_id = (u8) ret;
/* VTVout LDO used to power up ab8500-GPADC */
gpadc->regu = regulator_get(&pdev->dev, "vddadc");
if (IS_ERR(gpadc->regu)) {