Add a new driver for the ambient light/proximity sensor
device. The driver exposes three channels: light_clear
light_ir and proximity. It also supports triggered buffer,
high and low ambient light threshold event and proximity
detection event.
Signed-off-by: Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
.../devicetree/bindings/iio/light/gp2ap020a00f.txt | 20 +
drivers/iio/light/Kconfig | 12 +
drivers/iio/light/Makefile | 1 +
drivers/iio/light/gp2ap020a00f.c | 1193 ++++++++++++++++++++
4 files changed, 1226 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/iio/light/gp2ap020a00f.txt
create mode 100644 drivers/iio/light/gp2ap020a00f.c
diff --git a/Documentation/devicetree/bindings/iio/light/gp2ap020a00f.txt b/Documentation/devicetree/bindings/iio/light/gp2ap020a00f.txt
new file mode 100644
index 0000000..bef1d37
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/light/gp2ap020a00f.txt
@@ -0,0 +1,20 @@
+* Sharp GP2AP020A00F I2C Proximity/Opto sensor
+
+Required properties:
+
+ - compatible : should be "sharp,gp2ap020a00f"
+ - reg : the I2C address of the light sensor
+ - interrupt-parent : phandle to the parent interrupt controller
+ - interrupts : should be INT interrupt pin
+ - vled-supply : VLED power supply, as covered
+ in Documentation/devicetree/bindings/regulator/regulator.txt
+
+Example:
+
+gp2ap020a00f@39 {
+ compatible = "sharp,gp2ap020a00f";
+ reg = <0x39>;
+ interrupt-parent = <&gpx0>;
+ interrupts = <2 0>;
+ vled-supply = <...>;
+};
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index 5ef1a39..c3d5152 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -52,6 +52,18 @@ config VCNL4000
To compile this driver as a module, choose M here: the
module will be called vcnl4000.
+config GP2AP020A00F
+ tristate "Sharp GP2AP020A00F I2C Proximity/Opto sensor driver"
+ depends on I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ Say Y here if you have a Sharp GP2AP020A00F proximity/als combo-chip
+ hooked to an I2C bus.
+
+ To compile this driver as a module, choose M here: the
+ module will be called gp2ap020a00f.
+
config HID_SENSOR_ALS
depends on HID_SENSOR_HUB
select IIO_BUFFER
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index 040d9c7..b20c667 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_SENSORS_LM3533) += lm3533-als.o
obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o
obj-$(CONFIG_VCNL4000) += vcnl4000.o
obj-$(CONFIG_HID_SENSOR_ALS) += hid-sensor-als.o
+obj-$(CONFIG_GP2AP020A00F) += gp2ap020a00f.o
diff --git a/drivers/iio/light/gp2ap020a00f.c b/drivers/iio/light/gp2ap020a00f.c
new file mode 100644
index 0000000..abb246c
--- /dev/null
+++ b/drivers/iio/light/gp2ap020a00f.c
@@ -0,0 +1,1193 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/regulator/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#define GP2A_I2C_NAME "gp2ap020a00f"
+
+/* Registers */
+#define OP_REG 0x00 /* Basic operations */
+#define ALS_REG 0x01 /* ALS related settings */
+#define PS_REG 0x02 /* PS related settings */
+#define LED_REG 0x03 /* LED reg */
+#define TL_L_REG 0x04 /* ALS: Threshold low LSB */
+#define TL_H_REG 0x05 /* ALS: Threshold low MSB */
+#define TH_L_REG 0x06 /* ALS: Threshold high LSB */
+#define TH_H_REG 0x07 /* ALS: Threshold high MSB */
+#define PL_L_REG 0x08 /* PS: Threshold low LSB */
+#define PL_H_REG 0x09 /* PS: Threshold low MSB */
+#define PH_L_REG 0x0a /* PS: Threshold high LSB */
+#define PH_H_REG 0x0b /* PS: Threshold high MSB */
+#define D0_L_REG 0x0c /* ALS result: Clear/Illuminance LSB */
+#define D0_H_REG 0x0d /* ALS result: Clear/Illuminance MSB */
+#define D1_L_REG 0x0e /* ALS result: IR LSB */
+#define D1_H_REG 0x0f /* ALS result: IR LSB */
+#define D2_L_REG 0x10 /* PS result LSB */
+#define D2_H_REG 0x11 /* PS result MSB */
+#define REGS_NUM 0x12 /* Number of registers */
+
+/* OP_REG bits */
+#define OP3_MASK 0x80 /* Software shutdown */
+#define OP3_SHUTDOWN 0x00
+#define OP3_OPERATION 0x80
+#define OP2_MASK 0x40 /* Auto shutdown/Continuous operation */
+#define OP2_AUTO_SHUTDOWN 0x00
+#define OP2_CONT_OPERATION 0x40
+#define OP_MASK 0x30 /* Operating mode selection */
+#define OP_ALS_AND_PS 0x00
+#define OP_ALS 0x10
+#define OP_PS 0x20
+#define OP_DEBUG 0x30
+#define PROX_MASK 0x08 /* PS: detection/non-detection */
+#define PROX_NON_DETECT 0x00
+#define PROX_DETECT 0x08
+#define FLAG_P 0x04 /* PS: interrupt result */
+#define FLAG_A 0x02 /* ALS: interrupt result */
+#define TYPE_MASK 0x01 /* Output data type selection */
+#define TYPE_MANUAL_CALC 0x00
+#define TYPE_AUTO_CALC 0x01
+
+/* ALS_REG bits */
+#define PRST_MASK 0xc0 /* Number of measurement cycles */
+#define PRST_ONCE 0x00
+#define PRST_4_CYCLES 0x40
+#define PRST_8_CYCLES 0x80
+#define PRST_16_CYCLES 0xc0
+#define RES_A_MASK 0x38 /* ALS: Resolution (0.39ms - 800ms) */
+#define RES_A_800ms 0x00
+#define RES_A_400ms 0x08
+#define RES_A_200ms 0x10
+#define RES_A_100ms 0x18
+#define RES_A_25ms 0x20
+#define RES_A_6_25ms 0x28
+#define RES_A_1_56ms 0x30
+#define RES_A_0_39ms 0x38
+#define RANGE_A_MASK 0x07 /* ALS: Max measurable range (x1 - x128) */
+#define RANGE_A_x1 0x00
+#define RANGE_A_x2 0x01
+#define RANGE_A_x4 0x02
+#define RANGE_A_x8 0x03
+#define RANGE_A_x16 0x04
+#define RANGE_A_x32 0x05
+#define RANGE_A_x64 0x06
+#define RANGE_A_x128 0x07
+
+/* PS_REG bits */
+#define ALC_MASK 0x80 /* Auto light cancel */
+#define ALC_ON 0x80
+#define ALC_OFF 0x00
+#define INTTYPE_MASK 0x40 /* Interrupt type setting */
+#define INTTYPE_LEVEL 0x00
+#define INTTYPE_PULSE 0x40
+#define RES_P_MASK 0x38 /* PS: Resolution (0.39ms - 800ms) */
+#define RES_P_800ms_x2 0x00
+#define RES_P_400ms_x2 0x08
+#define RES_P_200ms_x2 0x10
+#define RES_P_100ms_x2 0x18
+#define RES_P_25ms_x2 0x20
+#define RES_P_6_25ms_x2 0x28
+#define RES_P_1_56ms_x2 0x30
+#define RES_P_0_39ms_x2 0x38
+#define RANGE_P_MASK 0x07 /* PS: Max measurable range (x1 - x128) */
+#define RANGE_P_x1 0x00
+#define RANGE_P_x2 0x01
+#define RANGE_P_x4 0x02
+#define RANGE_P_x8 0x03
+#define RANGE_P_x16 0x04
+#define RANGE_P_x32 0x05
+#define RANGE_P_x64 0x06
+#define RANGE_P_x128 0x07
+
+/* LED reg bits */
+#define INTVAL_MASK 0xc0 /* Intermittent operating */
+#define INTVAL_0 0x00
+#define INTVAL_4 0x40
+#define INTVAL_8 0x80
+#define INTVAL_16 0xc0
+#define IS_MASK 0x30 /* ILED drive peak current setting */
+#define IS_13_8mA 0x00
+#define IS_27_5mA 0x10
+#define IS_55mA 0x20
+#define IS_110mA 0x30
+#define PIN_MASK 0x0c /* INT terminal setting */
+#define PIN_ALS_OR_PS 0x00
+#define PIN_ALS 0x04
+#define PIN_PS 0x08
+#define PIN_PS_DETECT 0x0c
+#define FREQ_MASK 0x02 /* LED modulation frequency */
+#define FREQ_327_5kHz 0x00
+#define FREQ_81_8kHz 0x02
+#define RST 0x01 /* Software reset */
+
+#define GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR 0
+#define GP2AP020A00F_SCAN_MODE_LIGHT_IR 1
+#define GP2AP020A00F_SCAN_MODE_PROXIMITY 2
+#define GP2AP020A00F_CHAN_TIMESTAMP 3
+
+#define GP2AP020A00F_DATA_READY_TIMEOUT ((1000*HZ)/1000)
+
+#define GP2AP020A00F_DATA_REG(chan) (D0_L_REG + (chan) * 2)
+
+#define GP2AP020A00F_SUBTRACT_MODE 0
+#define GP2AP020A00F_ADD_MODE 1
+
+#define GP2AP020A00F_MAX_CHANNELS 3
+
+enum gp2ap020a00f_opmode {
+ GP2AP020A00F_OPMODE_READ_RAW_CLEAR,
+ GP2AP020A00F_OPMODE_READ_RAW_IR,
+ GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_OPMODE_PS,
+ GP2AP020A00F_OPMODE_ALS_AND_PS,
+ GP2AP020A00F_OPMODE_PROX_DETECT,
+ GP2AP020A00F_OPMODE_SHUTDOWN,
+};
+
+enum gp2ap020a00f_cmd {
+ GP2AP020A00F_CMD_READ_RAW_CLEAR,
+ GP2AP020A00F_CMD_READ_RAW_IR,
+ GP2AP020A00F_CMD_READ_RAW_PROXIMITY,
+ GP2AP020A00F_CMD_TRIGGER_CLEAR_EN,
+ GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS,
+ GP2AP020A00F_CMD_TRIGGER_IR_EN,
+ GP2AP020A00F_CMD_TRIGGER_IR_DIS,
+ GP2AP020A00F_CMD_TRIGGER_PROX_EN,
+ GP2AP020A00F_CMD_TRIGGER_PROX_DIS,
+ GP2AP020A00F_CMD_ALS_HIGH_EV_EN,
+ GP2AP020A00F_CMD_ALS_HIGH_EV_DIS,
+ GP2AP020A00F_CMD_ALS_LOW_EV_EN,
+ GP2AP020A00F_CMD_ALS_LOW_EV_DIS,
+ GP2AP020A00F_CMD_PROX_EV_EN,
+ GP2AP020A00F_CMD_PROX_EV_DIS,
+};
+
+enum gp2ap020a00f_flags {
+ GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER,
+ GP2AP020A00F_FLAG_ALS_IR_TRIGGER,
+ GP2AP020A00F_FLAG_PS_TRIGGER,
+ GP2AP020A00F_FLAG_PS_RISING_EVENT,
+ GP2AP020A00F_FLAG_ALS_RISING_EVENT,
+ GP2AP020A00F_FLAG_ALS_FALLING_EVENT,
+ GP2AP020A00F_FLAG_DATA_READY,
+};
+
+struct gp2ap020a00f_data {
+ const struct gp2ap020a00f_platform_data *pdata;
+ struct i2c_client *client;
+ struct mutex lock;
+ char *buffer;
+ u8 reg_cache[REGS_NUM];
+ struct regulator *vled_reg;
+ unsigned long flags;
+ enum gp2ap020a00f_opmode cur_opmode;
+ wait_queue_head_t data_ready_queue;
+ struct iio_trigger *trig;
+};
+
+static int gp2ap020a00f_set_operation_mode(struct gp2ap020a00f_data *data,
+ enum gp2ap020a00f_opmode op)
+{
+ u8 prev_ctrl_regs[4];
+ int err;
+
+ prev_ctrl_regs[OP_REG] = data->reg_cache[OP_REG];
+ prev_ctrl_regs[ALS_REG] = data->reg_cache[ALS_REG];
+ prev_ctrl_regs[PS_REG] = data->reg_cache[PS_REG];
+ prev_ctrl_regs[LED_REG] = data->reg_cache[LED_REG];
+
+ data->reg_cache[OP_REG] &= ~(OP_MASK | OP2_MASK | OP3_MASK
+ | TYPE_MASK);
+ data->reg_cache[ALS_REG] &= ~PRST_MASK;
+ data->reg_cache[LED_REG] &= ~PIN_MASK;
+
+ switch (op) {
+ case GP2AP020A00F_OPMODE_READ_RAW_CLEAR:
+ case GP2AP020A00F_OPMODE_READ_RAW_IR:
+ data->reg_cache[OP_REG] |= (OP_ALS | OP2_AUTO_SHUTDOWN
+ | OP3_OPERATION | TYPE_MANUAL_CALC);
+ data->reg_cache[ALS_REG] |= PRST_ONCE;
+ data->reg_cache[LED_REG] |= PIN_ALS;
+ break;
+ case GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY:
+ data->reg_cache[OP_REG] |= (OP_PS | OP2_AUTO_SHUTDOWN
+ | OP3_OPERATION | TYPE_MANUAL_CALC);
+ data->reg_cache[ALS_REG] |= PRST_ONCE;
+ data->reg_cache[LED_REG] |= PIN_PS;
+ break;
+ case GP2AP020A00F_OPMODE_PROX_DETECT:
+ data->reg_cache[OP_REG] |= (OP_PS | OP2_CONT_OPERATION
+ | OP3_OPERATION | TYPE_MANUAL_CALC);
+ data->reg_cache[ALS_REG] |= PRST_4_CYCLES;
+ data->reg_cache[LED_REG] |= PIN_PS_DETECT;
+ break;
+ case GP2AP020A00F_OPMODE_ALS:
+ data->reg_cache[OP_REG] |= (OP_ALS | OP2_CONT_OPERATION
+ | OP3_OPERATION | TYPE_MANUAL_CALC);
+ data->reg_cache[ALS_REG] |= PRST_ONCE;
+ data->reg_cache[LED_REG] |= PIN_ALS;
+ break;
+ case GP2AP020A00F_OPMODE_PS:
+ data->reg_cache[OP_REG] |= (OP_PS | OP2_CONT_OPERATION
+ | OP3_OPERATION | TYPE_MANUAL_CALC);
+ data->reg_cache[ALS_REG] |= PRST_4_CYCLES;
+ data->reg_cache[LED_REG] |= PIN_PS;
+ break;
+ case GP2AP020A00F_OPMODE_ALS_AND_PS:
+ data->reg_cache[OP_REG] |= (OP_ALS_AND_PS | OP2_CONT_OPERATION
+ | OP3_OPERATION | TYPE_MANUAL_CALC);
+ data->reg_cache[ALS_REG] |= PRST_4_CYCLES;
+ data->reg_cache[LED_REG] |= PIN_ALS_OR_PS;
+ break;
+ case GP2AP020A00F_OPMODE_SHUTDOWN:
+ /*
+ * Bring back last OP state to avoid sending shutdown
+ * command twice due to spurious op mode transition.
+ */
+ data->reg_cache[OP_REG] = prev_ctrl_regs[OP_REG]
+ & OP_MASK;
+ break;
+ }
+
+ /*
+ * Shutdown the device if the operation being executed entails
+ * mode transition.
+ */
+ if ((data->reg_cache[OP_REG] & OP_MASK) !=
+ (prev_ctrl_regs[OP_REG] & OP_MASK)) {
+ /* set shutdown mode */
+ err = i2c_smbus_write_byte_data(data->client, OP_REG, 0);
+ if (err < 0)
+ goto error_ret;
+ }
+
+ err = i2c_smbus_write_i2c_block_data(data->client, ALS_REG, 3,
+ &data->reg_cache[ALS_REG]);
+ if (err < 0)
+ goto error_ret;
+
+ /* Set OP_REG and apply operation mode (power on / off) */
+ err = i2c_smbus_write_byte_data(data->client, OP_REG,
+ data->reg_cache[OP_REG]);
+ if (err < 0)
+ goto error_ret;
+
+ data->cur_opmode = op;
+
+ return 0;
+
+error_ret:
+ data->reg_cache[OP_REG] = prev_ctrl_regs[OP_REG];
+ data->reg_cache[ALS_REG] = prev_ctrl_regs[ALS_REG];
+ data->reg_cache[PS_REG] = prev_ctrl_regs[PS_REG];
+ data->reg_cache[LED_REG] = prev_ctrl_regs[LED_REG];
+
+ return err;
+}
+
+static bool gp2ap020a00f_als_enabled(struct gp2ap020a00f_data *data)
+{
+ return test_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER,
+ &data->flags) ||
+ test_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER,
+ &data->flags) ||
+ test_bit(GP2AP020A00F_FLAG_ALS_RISING_EVENT,
+ &data->flags) ||
+ test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EVENT,
+ &data->flags);
+}
+
+static int gp2ap020a00f_alter_opmode(struct gp2ap020a00f_data *data,
+ enum gp2ap020a00f_opmode diff_mode, int add_sub)
+{
+ enum gp2ap020a00f_opmode new_mode;
+ int err;
+
+ if (diff_mode != GP2AP020A00F_OPMODE_ALS &&
+ diff_mode != GP2AP020A00F_OPMODE_PS)
+ return -EINVAL;
+
+ if (add_sub == GP2AP020A00F_ADD_MODE) {
+ if (data->cur_opmode == GP2AP020A00F_OPMODE_SHUTDOWN)
+ new_mode = diff_mode;
+ else
+ new_mode = GP2AP020A00F_OPMODE_ALS_AND_PS;
+ } else {
+ if (data->cur_opmode == GP2AP020A00F_OPMODE_ALS_AND_PS)
+ new_mode = (diff_mode == GP2AP020A00F_OPMODE_ALS) ?
+ GP2AP020A00F_OPMODE_PS :
+ GP2AP020A00F_OPMODE_ALS;
+ else
+ new_mode = GP2AP020A00F_OPMODE_SHUTDOWN;
+ }
+
+ err = gp2ap020a00f_set_operation_mode(data, new_mode);
+
+ return err;
+}
+
+static int gp2ap020a00f_exec_cmd(struct gp2ap020a00f_data *data,
+ enum gp2ap020a00f_cmd cmd)
+{
+ const u8 thresh_off_buf[2] = {0x00, 0x00};
+ int err = 0;
+
+ switch (cmd) {
+ case GP2AP020A00F_CMD_READ_RAW_CLEAR:
+ if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN)
+ return -EBUSY;
+ err = gp2ap020a00f_set_operation_mode(data,
+ GP2AP020A00F_OPMODE_READ_RAW_CLEAR);
+ break;
+ case GP2AP020A00F_CMD_READ_RAW_IR:
+ if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN)
+ return -EBUSY;
+ err = gp2ap020a00f_set_operation_mode(data,
+ GP2AP020A00F_OPMODE_READ_RAW_IR);
+ break;
+ case GP2AP020A00F_CMD_READ_RAW_PROXIMITY:
+ if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN)
+ return -EBUSY;
+ err = gp2ap020a00f_set_operation_mode(data,
+ GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY);
+ break;
+ case GP2AP020A00F_CMD_TRIGGER_CLEAR_EN:
+ if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
+ return -EBUSY;
+ if (!gp2ap020a00f_als_enabled(data))
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_ADD_MODE);
+ set_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags);
+ break;
+ case GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS:
+ clear_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags);
+ if (gp2ap020a00f_als_enabled(data))
+ break;
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_SUBTRACT_MODE);
+ break;
+ case GP2AP020A00F_CMD_TRIGGER_IR_EN:
+ if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
+ return -EBUSY;
+ if (!gp2ap020a00f_als_enabled(data))
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_ADD_MODE);
+ set_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags);
+ break;
+ case GP2AP020A00F_CMD_TRIGGER_IR_DIS:
+ clear_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags);
+ if (gp2ap020a00f_als_enabled(data))
+ break;
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_SUBTRACT_MODE);
+ break;
+ case GP2AP020A00F_CMD_TRIGGER_PROX_EN:
+ set_bit(GP2AP020A00F_FLAG_PS_TRIGGER, &data->flags);
+ /*
+ * Don't change opmode if in PROX_DETECT, as
+ * it is compatible with PS mode.
+ */
+ if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
+ break;
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_PS,
+ GP2AP020A00F_ADD_MODE);
+ break;
+ case GP2AP020A00F_CMD_TRIGGER_PROX_DIS:
+ clear_bit(GP2AP020A00F_FLAG_PS_TRIGGER, &data->flags);
+ if (test_bit(GP2AP020A00F_FLAG_PS_RISING_EVENT, &data->flags))
+ break;
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_PS,
+ GP2AP020A00F_SUBTRACT_MODE);
+ break;
+ case GP2AP020A00F_CMD_ALS_HIGH_EV_EN:
+ if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
+ return -EBUSY;
+ if (!gp2ap020a00f_als_enabled(data)) {
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_ADD_MODE);
+ if (err < 0)
+ return err;
+ }
+ set_bit(GP2AP020A00F_FLAG_ALS_RISING_EVENT, &data->flags);
+ err = i2c_smbus_write_i2c_block_data(data->client, TH_L_REG, 2,
+ &data->reg_cache[TH_L_REG]);
+ break;
+ case GP2AP020A00F_CMD_ALS_HIGH_EV_DIS:
+ clear_bit(GP2AP020A00F_FLAG_ALS_RISING_EVENT, &data->flags);
+ if (!gp2ap020a00f_als_enabled(data)) {
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_SUBTRACT_MODE);
+ if (err < 0)
+ return err;
+ }
+ err = i2c_smbus_write_i2c_block_data(data->client, TH_L_REG, 2,
+ thresh_off_buf);
+ break;
+ case GP2AP020A00F_CMD_ALS_LOW_EV_EN:
+ if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
+ return -EBUSY;
+ if (!gp2ap020a00f_als_enabled(data)) {
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_ADD_MODE);
+ if (err < 0)
+ return err;
+ }
+ set_bit(GP2AP020A00F_FLAG_ALS_FALLING_EVENT, &data->flags);
+ err = i2c_smbus_write_i2c_block_data(data->client, TL_L_REG, 2,
+ &data->reg_cache[TL_L_REG]);
+ break;
+ case GP2AP020A00F_CMD_ALS_LOW_EV_DIS:
+ clear_bit(GP2AP020A00F_FLAG_ALS_FALLING_EVENT, &data->flags);
+ if (!gp2ap020a00f_als_enabled(data)) {
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_SUBTRACT_MODE);
+ if (err < 0)
+ return err;
+ }
+ err = i2c_smbus_write_i2c_block_data(data->client, TL_L_REG, 2,
+ thresh_off_buf);
+ break;
+ case GP2AP020A00F_CMD_PROX_EV_EN:
+ if (gp2ap020a00f_als_enabled(data))
+ return -EBUSY;
+ set_bit(GP2AP020A00F_FLAG_PS_RISING_EVENT, &data->flags);
+ err = gp2ap020a00f_set_operation_mode(data,
+ GP2AP020A00F_OPMODE_PROX_DETECT);
+ if (err < 0)
+ return err;
+ err = i2c_smbus_write_i2c_block_data(data->client, PH_L_REG, 2,
+ &data->reg_cache[PH_L_REG]);
+ break;
+ case GP2AP020A00F_CMD_PROX_EV_DIS:
+ clear_bit(GP2AP020A00F_FLAG_PS_RISING_EVENT, &data->flags);
+ if (test_bit(GP2AP020A00F_FLAG_PS_TRIGGER, &data->flags))
+ err = gp2ap020a00f_set_operation_mode(data,
+ GP2AP020A00F_OPMODE_PS);
+ else
+ err = gp2ap020a00f_set_operation_mode(data,
+ GP2AP020A00F_OPMODE_SHUTDOWN);
+ if (err < 0)
+ return err;
+ err = i2c_smbus_write_i2c_block_data(data->client, PH_L_REG, 2,
+ thresh_off_buf);
+ break;
+ }
+
+ return err;
+}
+
+static int gp2ap020a00f_get_reg_cache_word(struct gp2ap020a00f_data *data,
+ u8 reg_addr)
+{
+ return (data->reg_cache[reg_addr + 1] << 8) |
+ data->reg_cache[reg_addr];
+}
+
+/* Returns 0 if the end of conversion interrupt occured or -ETIME otherwise */
+static int wait_conversion_complete_interrupt(struct gp2ap020a00f_data *data)
+{
+ int ret;
+
+ ret = wait_event_timeout(data->data_ready_queue,
+ test_bit(GP2AP020A00F_FLAG_DATA_READY,
+ &data->flags),
+ GP2AP020A00F_DATA_READY_TIMEOUT);
+ clear_bit(GP2AP020A00F_FLAG_DATA_READY, &data->flags);
+
+ return ret > 0 ? 0 : -ETIME;
+}
+
+static int gp2ap020a00f_read_output(struct gp2ap020a00f_data *data,
+ u8 output_reg, int *val)
+{
+ int err = -EINVAL;
+
+ err = wait_conversion_complete_interrupt(data);
+ if (err < 0)
+ dev_dbg(&data->client->dev, "data ready timeout\n");
+
+ err = i2c_smbus_read_i2c_block_data(data->client, output_reg, 2,
+ &data->reg_cache[output_reg]);
+ if (err < 0)
+ return err;
+
+ *val = gp2ap020a00f_get_reg_cache_word(data, output_reg);
+
+ return err;
+}
+
+static irqreturn_t gp2ap020a00f_event_handler(int irq, void *data)
+{
+ struct iio_dev *indio_dev = data;
+ struct gp2ap020a00f_data *lgt = iio_priv(indio_dev);
+ u8 op_reg_val, op_reg_flags;
+ int output_val, ret;
+
+ /* Read interrupt flags */
+ ret = i2c_smbus_read_i2c_block_data(lgt->client, OP_REG, 1,
+ &op_reg_val);
+ if (ret < 0)
+ goto done;
+
+ op_reg_flags = op_reg_val & (FLAG_A | FLAG_P | PROX_DETECT);
+
+ /* Clear interrupt flags */
+ op_reg_val &= (~FLAG_A & ~FLAG_P & ~PROX_DETECT);
+ ret = i2c_smbus_write_i2c_block_data(lgt->client, OP_REG, 1,
+ &op_reg_val);
+ if (ret < 0)
+ goto done;
+
+ if (lgt->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_CLEAR ||
+ lgt->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_IR ||
+ lgt->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY) {
+ set_bit(GP2AP020A00F_FLAG_DATA_READY, &lgt->flags);
+ wake_up(&lgt->data_ready_queue);
+ goto done;
+ }
+
+ /*
+ * We need to read output value to distinguish
+ * between high and low ambient light threshold event.
+ */
+ if (op_reg_flags & FLAG_A) {
+ ret = i2c_smbus_read_i2c_block_data(lgt->client, D0_L_REG, 2,
+ &lgt->reg_cache[D0_L_REG]);
+ if (ret < 0)
+ goto done;
+
+ output_val = gp2ap020a00f_get_reg_cache_word(lgt, D0_L_REG);
+
+ if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EVENT, &lgt->flags))
+ if (output_val > gp2ap020a00f_get_reg_cache_word(lgt,
+ TH_L_REG))
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(
+ IIO_LIGHT,
+ GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR,
+ IIO_MOD_LIGHT_CLEAR,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ iio_get_time_ns());
+
+ if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EVENT, &lgt->flags))
+ if (output_val < gp2ap020a00f_get_reg_cache_word(lgt,
+ TL_L_REG))
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(
+ IIO_LIGHT,
+ GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR,
+ IIO_MOD_LIGHT_CLEAR,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ iio_get_time_ns());
+ }
+
+ if (test_bit(GP2AP020A00F_FLAG_PS_RISING_EVENT, &lgt->flags) &&
+ (op_reg_flags & FLAG_P)) {
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(
+ IIO_PROXIMITY,
+ GP2AP020A00F_SCAN_MODE_PROXIMITY,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ iio_get_time_ns());
+ }
+
+ /* This fires off trigger handler */
+ iio_trigger_poll(lgt->trig, 0);
+
+done:
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t gp2ap020a00f_trigger_handler(int irq, void *data)
+{
+ struct iio_poll_func *pf = data;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct gp2ap020a00f_data *lgt = iio_priv(indio_dev);
+ size_t d_size = 0;
+ int i, ret;
+
+ for_each_set_bit(i, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ ret = i2c_smbus_read_i2c_block_data(lgt->client,
+ GP2AP020A00F_DATA_REG(i), 2,
+ &lgt->buffer[d_size]);
+ if (ret < 0)
+ goto done;
+ d_size += 2;
+ }
+
+ if (indio_dev->scan_timestamp) {
+ s64 *timestamp = (s64 *)((u8 *)lgt->buffer +
+ ALIGN(d_size, sizeof(s64)));
+ *timestamp = pf->timestamp;
+ }
+
+ iio_push_to_buffers(indio_dev, lgt->buffer);
+
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static int gp2ap020a00f_setup(struct gp2ap020a00f_data *data)
+{
+ data->reg_cache[OP_REG] = OP3_SHUTDOWN;
+ data->reg_cache[LED_REG] = INTVAL_0 | IS_110mA | FREQ_327_5kHz;
+ data->reg_cache[ALS_REG] = RES_A_25ms | RANGE_A_x8;
+ data->reg_cache[PS_REG] = ALC_ON | INTTYPE_LEVEL | RES_P_1_56ms_x2
+ | RANGE_P_x4;
+
+ return i2c_smbus_write_i2c_block_data(data->client, OP_REG, REGS_NUM,
+ &data->reg_cache[OP_REG]);
+}
+
+static u8 gp2ap020a00f_get_reg_by_event_code(u64 event_code)
+{
+ int chan_type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code);
+
+ if (chan_type == IIO_PROXIMITY) {
+ /*
+ * Only IIO_EV_DIR_RISING direction for the IIO_PROXIMITY
+ * event is supported by the driver.
+ */
+ return PH_L_REG;
+ } else if (chan_type == IIO_LIGHT) {
+ if (IIO_EVENT_CODE_EXTRACT_DIR(event_code)
+ == IIO_EV_DIR_RISING)
+ return TH_L_REG;
+ else
+ return TL_L_REG;
+ } else {
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int gp2ap020a00f_write_event_val(struct iio_dev *indio_dev,
+ u64 event_code, int val)
+{
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ bool event_en = false;
+ int thresh_reg_l, err = 0;
+
+ mutex_lock(&data->lock);
+
+ thresh_reg_l = gp2ap020a00f_get_reg_by_event_code(event_code);
+
+ if (thresh_reg_l > PH_L_REG) {
+ err = -EINVAL;
+ goto error_ret;
+ }
+
+ data->reg_cache[thresh_reg_l] = val & 0xff;
+ data->reg_cache[thresh_reg_l + 1] = val >> 8;
+
+ switch (thresh_reg_l) {
+ case TH_L_REG:
+ if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EVENT,
+ &data->flags))
+ event_en = true;
+ break;
+ case TL_L_REG:
+ if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EVENT,
+ &data->flags))
+ event_en = true;
+ break;
+ case PH_L_REG:
+ if (test_bit(GP2AP020A00F_FLAG_PS_RISING_EVENT,
+ &data->flags))
+ event_en = true;
+ break;
+ }
+
+ if (event_en)
+ err = i2c_smbus_write_i2c_block_data(data->client,
+ thresh_reg_l, 2,
+ &data->reg_cache[thresh_reg_l]);
+error_ret:
+ mutex_unlock(&data->lock);
+
+ return err;
+}
+
+static int gp2ap020a00f_read_event_val(struct iio_dev *indio_dev,
+ u64 event_code, int *val)
+{
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ int thresh_reg_l;
+
+ mutex_lock(&data->lock);
+
+ thresh_reg_l = gp2ap020a00f_get_reg_by_event_code(event_code);
+
+ *val = gp2ap020a00f_get_reg_cache_word(data, thresh_reg_l);
+
+ mutex_unlock(&data->lock);
+
+ return 0;
+}
+
+static int gp2ap020a00f_write_event_config(struct iio_dev *indio_dev,
+ u64 event_code, int state)
+{
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ enum gp2ap020a00f_cmd cmd;
+ int chan_type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code);
+ int err;
+
+ mutex_lock(&data->lock);
+
+ if (chan_type == IIO_PROXIMITY) {
+ cmd = state ? GP2AP020A00F_CMD_PROX_EV_EN :
+ GP2AP020A00F_CMD_PROX_EV_DIS;
+ err = gp2ap020a00f_exec_cmd(data, cmd);
+ } else if (chan_type == IIO_LIGHT) {
+ if (IIO_EVENT_CODE_EXTRACT_DIR(event_code)
+ == IIO_EV_DIR_RISING) {
+ cmd = state ? GP2AP020A00F_CMD_ALS_HIGH_EV_EN :
+ GP2AP020A00F_CMD_ALS_HIGH_EV_DIS;
+ err = gp2ap020a00f_exec_cmd(data, cmd);
+ } else {
+ cmd = state ? GP2AP020A00F_CMD_ALS_LOW_EV_EN :
+ GP2AP020A00F_CMD_ALS_LOW_EV_DIS;
+ err = gp2ap020a00f_exec_cmd(data, cmd);
+ }
+ } else {
+ return -EINVAL;
+ }
+
+ mutex_unlock(&data->lock);
+
+ return err;
+}
+
+static int gp2ap020a00f_read_event_config(struct iio_dev *indio_dev,
+ u64 event_code)
+{
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ int chan_type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code);
+ int event_en;
+
+ mutex_lock(&data->lock);
+
+ if (chan_type == IIO_PROXIMITY) {
+ event_en = test_bit(GP2AP020A00F_FLAG_PS_RISING_EVENT,
+ &data->flags);
+ } else if (chan_type == IIO_LIGHT) {
+ if (IIO_EVENT_CODE_EXTRACT_DIR(event_code)
+ == IIO_EV_DIR_RISING)
+ event_en = test_bit(GP2AP020A00F_FLAG_ALS_RISING_EVENT,
+ &data->flags);
+ else
+ event_en = test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EVENT,
+ &data->flags);
+ } else {
+ return -EINVAL;
+ }
+
+ mutex_unlock(&data->lock);
+
+ return event_en;
+}
+
+static int gp2ap020a00f_read_channel(struct gp2ap020a00f_data *data,
+ struct iio_chan_spec const *chan, int *val)
+{
+ enum gp2ap020a00f_cmd cmd;
+ int err;
+
+ switch (chan->scan_index) {
+ case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR:
+ cmd = GP2AP020A00F_CMD_READ_RAW_CLEAR;
+ break;
+ case GP2AP020A00F_SCAN_MODE_LIGHT_IR:
+ cmd = GP2AP020A00F_CMD_READ_RAW_IR;
+ break;
+ case GP2AP020A00F_SCAN_MODE_PROXIMITY:
+ cmd = GP2AP020A00F_CMD_READ_RAW_PROXIMITY;
+ break;
+ }
+
+ err = gp2ap020a00f_exec_cmd(data, cmd);
+ if (err < 0) {
+ dev_err(&data->client->dev, "gp2ap020a00f_exec_cmd failed\n");
+ goto error_ret;
+ }
+
+ err = gp2ap020a00f_read_output(data, chan->address, val);
+ if (err < 0)
+ dev_err(&data->client->dev, "gp2ap020a00f_read_output failed\n");
+
+ data->cur_opmode = GP2AP020A00F_OPMODE_SHUTDOWN;
+
+error_ret:
+ return err;
+}
+
+static int gp2ap020a00f_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2,
+ long mask)
+{
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ int err = -EINVAL;
+
+ mutex_lock(&data->lock);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (iio_buffer_enabled(indio_dev)) {
+ err = -EBUSY;
+ goto error_ret;
+ }
+ err = gp2ap020a00f_read_channel(data, chan, val);
+ break;
+ }
+
+error_ret:
+ mutex_unlock(&data->lock);
+
+ return err < 0 ? err : IIO_VAL_INT;
+}
+
+static const struct iio_chan_spec gp2ap020a00f_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .channel2 = IIO_MOD_LIGHT_CLEAR,
+ .modified = 1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 16,
+ .shift = 0,
+ .storagebits = 16,
+ .endianness = IIO_LE,
+ },
+ .scan_index = GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR,
+ .address = D0_L_REG,
+ .event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING) |
+ IIO_EV_BIT(IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ },
+ {
+ .type = IIO_LIGHT,
+ .channel2 = IIO_MOD_LIGHT_IR,
+ .modified = 1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 16,
+ .shift = 0,
+ .storagebits = 16,
+ .endianness = IIO_LE,
+ },
+ .scan_index = GP2AP020A00F_SCAN_MODE_LIGHT_IR,
+ .address = D1_L_REG,
+ },
+ {
+ .type = IIO_PROXIMITY,
+ .modified = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 16,
+ .shift = 0,
+ .storagebits = 16,
+ .endianness = IIO_LE,
+ },
+ .scan_index = GP2AP020A00F_SCAN_MODE_PROXIMITY,
+ .address = D2_L_REG,
+ .event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(GP2AP020A00F_CHAN_TIMESTAMP),
+};
+
+static const struct iio_info gp2ap020a00f_info = {
+ .read_raw = &gp2ap020a00f_read_raw,
+ .read_event_value = &gp2ap020a00f_read_event_val,
+ .read_event_config = &gp2ap020a00f_read_event_config,
+ .write_event_value = &gp2ap020a00f_write_event_val,
+ .write_event_config = &gp2ap020a00f_write_event_config,
+ .driver_module = THIS_MODULE,
+};
+
+static int gp2ap020a00f_buffer_preenable(struct iio_dev *indio_dev)
+{
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ size_t d_size = 0;
+ int i, err = 0;
+
+ mutex_lock(&data->lock);
+
+ /* Enable triggers according to the scan_mask */
+ for_each_set_bit(i, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ switch (i) {
+ case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR:
+ err = gp2ap020a00f_exec_cmd(data,
+ GP2AP020A00F_CMD_TRIGGER_CLEAR_EN);
+ if (err < 0)
+ goto error_ret;
+ break;
+ case GP2AP020A00F_SCAN_MODE_LIGHT_IR:
+ err = gp2ap020a00f_exec_cmd(data,
+ GP2AP020A00F_CMD_TRIGGER_IR_EN);
+ if (err < 0)
+ goto error_ret;
+ break;
+ case GP2AP020A00F_SCAN_MODE_PROXIMITY:
+ err = gp2ap020a00f_exec_cmd(data,
+ GP2AP020A00F_CMD_TRIGGER_PROX_EN);
+ if (err < 0)
+ goto error_ret;
+ break;
+ }
+ d_size += 2;
+ }
+
+ if (indio_dev->scan_timestamp)
+ d_size += sizeof(s64);
+
+ data->buffer = kmalloc(d_size, GFP_KERNEL);
+ if (data->buffer == NULL) {
+ err = -ENOMEM;
+ goto error_ret;
+ }
+
+ err = iio_sw_buffer_preenable(indio_dev);
+
+error_ret:
+ mutex_unlock(&data->lock);
+
+ return err;
+}
+
+static int gp2ap020a00f_buffer_predisable(struct iio_dev *indio_dev)
+{
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ int err;
+
+ mutex_lock(&data->lock);
+
+ if (test_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags)) {
+ err = gp2ap020a00f_exec_cmd(data,
+ GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS);
+ if (err < 0)
+ goto error_ret;
+ }
+
+ if (test_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags)) {
+ err = gp2ap020a00f_exec_cmd(data,
+ GP2AP020A00F_CMD_TRIGGER_IR_DIS);
+ if (err < 0)
+ goto error_ret;
+ }
+
+ if (test_bit(GP2AP020A00F_FLAG_PS_TRIGGER, &data->flags)) {
+ err = gp2ap020a00f_exec_cmd(data,
+ GP2AP020A00F_CMD_TRIGGER_PROX_DIS);
+ if (err < 0)
+ goto error_ret;
+ }
+
+ err = iio_triggered_buffer_predisable(indio_dev);
+ if (err < 0)
+ goto error_ret;
+
+ kfree(data->buffer);
+
+error_ret:
+ mutex_unlock(&data->lock);
+
+ return err;
+}
+
+static const struct iio_buffer_setup_ops gp2ap020a00f_buffer_setup_ops = {
+ .preenable = &gp2ap020a00f_buffer_preenable,
+ .postenable = &iio_triggered_buffer_postenable,
+ .predisable = &gp2ap020a00f_buffer_predisable,
+};
+
+static const struct iio_trigger_ops gp2ap020a00f_trigger_ops = {
+ .owner = THIS_MODULE,
+};
+
+static int gp2ap020a00f_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct gp2ap020a00f_data *data;
+ struct iio_dev *indio_dev;
+ int err;
+
+ indio_dev = iio_device_alloc(sizeof(*data));
+ if (indio_dev == NULL) {
+ err = -ENOMEM;
+ goto error_alloc;
+ }
+
+ data = iio_priv(indio_dev);
+
+ data->vled_reg = devm_regulator_get(&client->dev, "vled");
+ if (IS_ERR(data->vled_reg)) {
+ err = PTR_ERR(data->vled_reg);
+ goto error_regulator_get;
+ }
+
+ err = regulator_enable(data->vled_reg);
+ if (err)
+ goto error_free_data;
+
+ i2c_set_clientdata(client, indio_dev);
+
+ data->client = client;
+ data->cur_opmode = GP2AP020A00F_OPMODE_SHUTDOWN;
+
+ init_waitqueue_head(&data->data_ready_queue);
+
+ err = gp2ap020a00f_setup(data);
+ if (err < 0)
+ goto error_free_data;
+
+ mutex_init(&data->lock);
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = gp2ap020a00f_channels;
+ indio_dev->num_channels = ARRAY_SIZE(gp2ap020a00f_channels);
+ indio_dev->info = &gp2ap020a00f_info;
+ indio_dev->name = id->name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ /* Allocate buffer */
+ err = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+ &gp2ap020a00f_trigger_handler, &gp2ap020a00f_buffer_setup_ops);
+ if (err < 0)
+ goto error_free_data;
+
+ /* Allocate trigger */
+ data->trig = iio_trigger_alloc("%s-trigger", indio_dev->name);
+ if (data->trig == NULL) {
+ err = -ENOMEM;
+ dev_err(&indio_dev->dev, "Failed to allocate iio trigger.\n");
+ goto error_uninit_buffer;
+ }
+
+ err = request_threaded_irq(client->irq,
+ NULL,
+ &gp2ap020a00f_event_handler,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ "gp2ap020a00f_event",
+ indio_dev);
+ if (err < 0) {
+ dev_err(&indio_dev->dev, "Irq request failed.\n");
+ goto error_uninit_buffer;
+ }
+
+ data->trig->private_data = indio_dev;
+ data->trig->ops = &gp2ap020a00f_trigger_ops;
+ data->trig->dev.parent = &data->client->dev;
+
+ err = iio_trigger_register(data->trig);
+ if (err < 0) {
+ dev_err(&indio_dev->dev, "Failed to register iio trigger.\n");
+ goto error_free_irq;
+ }
+
+ indio_dev->trig = data->trig;
+
+ err = iio_device_register(indio_dev);
+ if (err < 0)
+ goto error_free_irq;
+
+ return 0;
+
+error_free_irq:
+ free_irq(client->irq, indio_dev);
+error_uninit_buffer:
+ iio_triggered_buffer_cleanup(indio_dev);
+error_free_data:
+ regulator_disable(data->vled_reg);
+error_regulator_get:
+ iio_device_free(indio_dev);
+error_alloc:
+ return err;
+}
+
+static int gp2ap020a00f_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+ regulator_disable(data->vled_reg);
+ free_irq(client->irq, indio_dev);
+ iio_device_free(indio_dev);
+
+ return 0;
+}
+
+static const struct i2c_device_id gp2ap020a00f_id[] = {
+ { GP2A_I2C_NAME, 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, gp2ap020a00f_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id gp2ap020a00f_of_match[] = {
+ { .compatible = "sharp,gp2ap020a00f" },
+ { }
+};
+#endif
+
+static struct i2c_driver gp2ap020a00f_driver = {
+ .driver = {
+ .name = GP2A_I2C_NAME,
+ .of_match_table = of_match_ptr(gp2ap020a00f_of_match),
+ .owner = THIS_MODULE,
+ },
+ .probe = gp2ap020a00f_probe,
+ .remove = gp2ap020a00f_remove,
+ .id_table = gp2ap020a00f_id,
+};
+
+module_i2c_driver(gp2ap020a00f_driver);
+
+MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("Sharp GP2AP020A00F I2C Proximity/Opto sensor driver");
+MODULE_LICENSE("GPL v2");
--
1.7.5.4
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