diff options
| author | Karl Komierowski <karl.komierowski@stericsson.com> | 2011-05-08 00:55:31 +0200 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2011-05-26 19:45:43 +0200 |
| commit | c9c9513fd08d1e0548003e86d70a211c2e456d49 (patch) | |
| tree | 98a557eb124dda2535b8e0708c5d5a92b577b4ea /drivers/mfd/ab8500-gpadc.c | |
| parent | mfd: Provide ab8500-core enumerators for chip cuts (diff) | |
| download | linux-c9c9513fd08d1e0548003e86d70a211c2e456d49.tar.xz linux-c9c9513fd08d1e0548003e86d70a211c2e456d49.zip | |
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>
Diffstat (limited to 'drivers/mfd/ab8500-gpadc.c')
| -rw-r--r-- | drivers/mfd/ab8500-gpadc.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/drivers/mfd/ab8500-gpadc.c b/drivers/mfd/ab8500-gpadc.c index 6421ad1160de..82708c1f316d 100644 --- a/drivers/mfd/ab8500-gpadc.c +++ b/drivers/mfd/ab8500-gpadc.c @@ -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)) { |