iio:adc: add iio driver for Palmas (twl6035/7) gpadc
This driver code was found as:
https://android.googlesource.com/kernel/tegra/+/aaabb2e045f31e5a970109ffdaae900dd403d17e/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>
diff --git a/include/linux/mfd/palmas.h b/include/linux/mfd/palmas.h
index 13e1d96..c800dbc 100644
--- a/include/linux/mfd/palmas.h
+++ b/include/linux/mfd/palmas.h
@@ -134,21 +134,32 @@
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 @@
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 @@
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;