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iio:adc: add iio driver for Palmas (twl6035/7) gpadc

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This driver code was found as:

aaabb2e045/drivers/staging/iio/adc

Fixed various compilation issues and test this driver on omap5 evm.

Signed-off-by: Pradeep Goudagunta <pgoudagunta@nvidia.com>
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Signed-off-by: Marek Belisko <marek@goldelico.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
H. Nikolaus Schaller
2015-10-16 14:53:38 +02:00
committed by Jonathan Cameron
parent 75b6548f17
commit e08e19c331
4 changed files with 877 additions and 24 deletions
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75
include/linux/mfd/palmas.h
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@@ -134,21 +134,32 @@ struct palmas_pmic_driver_data {
struct regulator_config config);
};
struct palmas_adc_wakeup_property {
int adc_channel_number;
int adc_high_threshold;
int adc_low_threshold;
};
struct palmas_gpadc_platform_data {
/* Channel 3 current source is only enabled during conversion */
int ch3_current;
int ch3_current; /* 0: off; 1: 10uA; 2: 400uA; 3: 800 uA */
/* Channel 0 current source can be used for battery detection.
* If used for battery detection this will cause a permanent current
* consumption depending on current level set here.
*/
int ch0_current;
int ch0_current; /* 0: off; 1: 5uA; 2: 15uA; 3: 20 uA */
bool extended_delay; /* use extended delay for conversion */
/* default BAT_REMOVAL_DAT setting on device probe */
int bat_removal;
/* Sets the START_POLARITY bit in the RT_CTRL register */
int start_polarity;
int auto_conversion_period_ms;
struct palmas_adc_wakeup_property *adc_wakeup1_data;
struct palmas_adc_wakeup_property *adc_wakeup2_data;
};
struct palmas_reg_init {
@@ -405,28 +416,7 @@ struct palmas_gpadc_calibration {
s32 offset_error;
};
struct palmas_gpadc {
struct device *dev;
struct palmas *palmas;
int ch3_current;
int ch0_current;
int gpadc_force;
int bat_removal;
struct mutex reading_lock;
struct completion irq_complete;
int eoc_sw_irq;
struct palmas_gpadc_calibration *palmas_cal_tbl;
int conv0_channel;
int conv1_channel;
int rt_channel;
};
#define PALMAS_DATASHEET_NAME(_name) "palmas-gpadc-chan-"#_name
struct palmas_gpadc_result {
s32 raw_code;
@@ -520,6 +510,43 @@ enum palmas_irqs {
PALMAS_NUM_IRQ,
};
/* Palmas GPADC Channels */
enum {
PALMAS_ADC_CH_IN0,
PALMAS_ADC_CH_IN1,
PALMAS_ADC_CH_IN2,
PALMAS_ADC_CH_IN3,
PALMAS_ADC_CH_IN4,
PALMAS_ADC_CH_IN5,
PALMAS_ADC_CH_IN6,
PALMAS_ADC_CH_IN7,
PALMAS_ADC_CH_IN8,
PALMAS_ADC_CH_IN9,
PALMAS_ADC_CH_IN10,
PALMAS_ADC_CH_IN11,
PALMAS_ADC_CH_IN12,
PALMAS_ADC_CH_IN13,
PALMAS_ADC_CH_IN14,
PALMAS_ADC_CH_IN15,
PALMAS_ADC_CH_MAX,
};
/* Palmas GPADC Channel0 Current Source */
enum {
PALMAS_ADC_CH0_CURRENT_SRC_0,
PALMAS_ADC_CH0_CURRENT_SRC_5,
PALMAS_ADC_CH0_CURRENT_SRC_15,
PALMAS_ADC_CH0_CURRENT_SRC_20,
};
/* Palmas GPADC Channel3 Current Source */
enum {
PALMAS_ADC_CH3_CURRENT_SRC_0,
PALMAS_ADC_CH3_CURRENT_SRC_10,
PALMAS_ADC_CH3_CURRENT_SRC_400,
PALMAS_ADC_CH3_CURRENT_SRC_800,
};
struct palmas_pmic {
struct palmas *palmas;
struct device *dev;