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mfd: ab8500-gpadc: Add gpadc hw conversion

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Add the support of gpacd hw conversion and make the number of
sample configurable.

Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Mattias WALLIN <mattias.wallin@stericsson.com>
Tested-by: Michel JAOUEN <michel.jaouen@stericsson.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Lee Jones
2013-02-26 10:06:55 +00:00
parent d89cc5aad1
commit 7348234625
3 changed files with 499 additions and 105 deletions
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30
include/linux/mfd/abx500/ab8500-gpadc.h
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@@ -4,12 +4,14 @@
*
* Author: Arun R Murthy <arun.murthy@stericsson.com>
* Author: Daniel Willerud <daniel.willerud@stericsson.com>
* Author: M'boumba Cedric Madianga <cedric.madianga@stericsson.com>
*/
#ifndef _AB8500_GPADC_H
#define _AB8500_GPADC_H
/* GPADC source: From datasheet(ADCSwSel[4:0] in GPADCCtrl2) */
/* GPADC source: From datasheet(ADCSwSel[4:0] in GPADCCtrl2
* and ADCHwSel[4:0] in GPADCCtrl3 ) */
#define BAT_CTRL 0x01
#define BTEMP_BALL 0x02
#define MAIN_CHARGER_V 0x03
@@ -24,12 +26,32 @@
#define BK_BAT_V 0x0C
#define DIE_TEMP 0x0D
#define SAMPLE_1 1
#define SAMPLE_4 4
#define SAMPLE_8 8
#define SAMPLE_16 16
#define RISING_EDGE 0
#define FALLING_EDGE 1
/* Arbitrary ADC conversion type constants */
#define ADC_SW 0
#define ADC_HW 1
struct ab8500_gpadc;
struct ab8500_gpadc *ab8500_gpadc_get(char *name);
int ab8500_gpadc_convert(struct ab8500_gpadc *gpadc, u8 channel);
int ab8500_gpadc_read_raw(struct ab8500_gpadc *gpadc, u8 channel);
int ab8500_gpadc_sw_hw_convert(struct ab8500_gpadc *gpadc, u8 channel,
u8 avg_sample, u8 trig_edge, u8 trig_timer, u8 conv_type);
static inline int ab8500_gpadc_convert(struct ab8500_gpadc *gpadc, u8 channel)
{
return ab8500_gpadc_sw_hw_convert(gpadc, channel,
SAMPLE_16, 0, 0, ADC_SW);
}
int ab8500_gpadc_read_raw(struct ab8500_gpadc *gpadc, u8 channel,
u8 avg_sample, u8 trig_edge, u8 trig_timer, u8 conv_type);
int ab8500_gpadc_ad_to_voltage(struct ab8500_gpadc *gpadc,
u8 channel, int ad_value);
u8 channel, int ad_value);
#endif /* _AB8500_GPADC_H */