Commit ae9ca493 authored by Wei Chen's avatar Wei Chen Committed by Linus Walleij
Browse files

gpio: sx150x: add support for sx1506 gpio expander device 



semtech has two series of sx150x gpio expanders: sx150x-456 and
sx150x-789.

The current gpio-150x driver in linux only support sx1508 and
sx1509.

We added sx1506 support code into this driver.

Signed-off-by: default avatarWei Chen <Wei.Chen@csr.com>
Signed-off-by: default avatarBarry Song <Baohua.Song@csr.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 093e9435

drivers/gpio/gpio-sx150x.c

+112 −45
Original line number Diff line number Diff line
@@ -26,20 +26,43 @@ 


#define NO_UPDATE_PENDING	-1



/* The chip models of sx150x */

#define SX150X_456 0

#define SX150X_789 1



struct sx150x_456_pri {

	u8 reg_pld_mode;

	u8 reg_pld_table0;

	u8 reg_pld_table1;

	u8 reg_pld_table2;

	u8 reg_pld_table3;

	u8 reg_pld_table4;

	u8 reg_advance;

};



struct sx150x_789_pri {

	u8 reg_drain;

	u8 reg_polarity;

	u8 reg_clock;

	u8 reg_misc;

	u8 reg_reset;

	u8 ngpios;

};



struct sx150x_device_data {

	u8 model;

	u8 reg_pullup;

	u8 reg_pulldn;

	u8 reg_drain;

	u8 reg_polarity;

	u8 reg_dir;

	u8 reg_data;

	u8 reg_irq_mask;

	u8 reg_irq_src;

	u8 reg_sense;

	u8 reg_clock;

	u8 reg_misc;

	u8 reg_reset;

	u8 ngpios;

	union {

		struct sx150x_456_pri x456;

		struct sx150x_789_pri x789;

	} pri;

};



struct sx150x_chip {
@@ -59,33 +82,59 @@ struct sx150x_chip { 


static const struct sx150x_device_data sx150x_devices[] = {

	[0] = { /* sx1508q */

		.model = SX150X_789,

		.reg_pullup	= 0x03,

		.reg_pulldn	= 0x04,

		.reg_drain    = 0x05,

		.reg_polarity = 0x06,

		.reg_dir	= 0x07,

		.reg_data	= 0x08,

		.reg_irq_mask	= 0x09,

		.reg_irq_src	= 0x0c,

		.reg_sense	= 0x0b,

		.pri.x789 = {

			.reg_drain	= 0x05,

			.reg_polarity	= 0x06,

			.reg_clock	= 0x0f,

			.reg_misc	= 0x10,

			.reg_reset	= 0x7d,

		.ngpios       = 8

		},

		.ngpios = 8,

	},

	[1] = { /* sx1509q */

		.model = SX150X_789,

		.reg_pullup	= 0x07,

		.reg_pulldn	= 0x09,

		.reg_drain    = 0x0b,

		.reg_polarity = 0x0d,

		.reg_dir	= 0x0f,

		.reg_data	= 0x11,

		.reg_irq_mask	= 0x13,

		.reg_irq_src	= 0x19,

		.reg_sense	= 0x17,

		.pri.x789 = {

			.reg_drain	= 0x0b,

			.reg_polarity	= 0x0d,

			.reg_clock	= 0x1e,

			.reg_misc	= 0x1f,

			.reg_reset	= 0x7d,

		},

		.ngpios	= 16

	},

	[2] = { /* sx1506q */

		.model = SX150X_456,

		.reg_pullup	= 0x05,

		.reg_pulldn	= 0x07,

		.reg_dir	= 0x03,

		.reg_data	= 0x01,

		.reg_irq_mask	= 0x09,

		.reg_irq_src	= 0x0f,

		.reg_sense	= 0x0d,

		.pri.x456 = {

			.reg_pld_mode	= 0x21,

			.reg_pld_table0	= 0x23,

			.reg_pld_table1	= 0x25,

			.reg_pld_table2	= 0x27,

			.reg_pld_table3	= 0x29,

			.reg_pld_table4	= 0x2b,

			.reg_advance	= 0xad,

		},

		.ngpios	= 16

	},

};
@@ -93,6 +142,7 @@ static const struct sx150x_device_data sx150x_devices[] = { 
static const struct i2c_device_id sx150x_id[] = {

	{"sx1508q", 0},

	{"sx1509q", 1},

	{"sx1506q", 2},

	{}

};

MODULE_DEVICE_TABLE(i2c, sx150x_id);
@@ -191,7 +241,7 @@ static int sx150x_get_io(struct sx150x_chip *chip, unsigned offset) 
static void sx150x_set_oscio(struct sx150x_chip *chip, int val)

{

	sx150x_i2c_write(chip->client,

			chip->dev_cfg->reg_clock,

			chip->dev_cfg->pri.x789.reg_clock,

			(val ? 0x1f : 0x10));

}
@@ -455,13 +505,13 @@ static int sx150x_reset(struct sx150x_chip *chip) 
	int err;



	err = i2c_smbus_write_byte_data(chip->client,

					chip->dev_cfg->reg_reset,

					chip->dev_cfg->pri.x789.reg_reset,

					0x12);

	if (err < 0)

		return err;



	err = i2c_smbus_write_byte_data(chip->client,

					chip->dev_cfg->reg_reset,

					chip->dev_cfg->pri.x789.reg_reset,

					0x34);

	return err;

}
@@ -477,9 +527,14 @@ static int sx150x_init_hw(struct sx150x_chip *chip, 
			return err;

	}



	if (chip->dev_cfg->model == SX150X_789)

		err = sx150x_i2c_write(chip->client,

			chip->dev_cfg->reg_misc,

				chip->dev_cfg->pri.x789.reg_misc,

				0x01);

	else

		err = sx150x_i2c_write(chip->client,

				chip->dev_cfg->pri.x456.reg_advance,

				0x04);

	if (err < 0)

		return err;
@@ -493,15 +548,27 @@ static int sx150x_init_hw(struct sx150x_chip *chip, 
	if (err < 0)

		return err;



	err = sx150x_init_io(chip, chip->dev_cfg->reg_drain,

	if (chip->dev_cfg->model == SX150X_789) {

		err = sx150x_init_io(chip,

				chip->dev_cfg->pri.x789.reg_drain,

				pdata->io_open_drain_ena);

		if (err < 0)

			return err;



	err = sx150x_init_io(chip, chip->dev_cfg->reg_polarity,

		err = sx150x_init_io(chip,

				chip->dev_cfg->pri.x789.reg_polarity,

				pdata->io_polarity);

		if (err < 0)

			return err;

	} else {

		/* Set all pins to work in normal mode */

		err = sx150x_init_io(chip,

				chip->dev_cfg->pri.x456.reg_pld_mode,

				0);

		if (err < 0)

			return err;

	}





	if (pdata->oscio_is_gpo)

		sx150x_set_oscio(chip, 0);

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