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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: Wei Chen <Wei.Chen@csr.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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@ -26,20 +26,43 @@
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#define NO_UPDATE_PENDING -1
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struct sx150x_device_data {
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u8 reg_pullup;
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u8 reg_pulldn;
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/* The chip models of sx150x */
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#define SX150X_456 0
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#define SX150X_789 1
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struct sx150x_456_pri {
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u8 reg_pld_mode;
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u8 reg_pld_table0;
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u8 reg_pld_table1;
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u8 reg_pld_table2;
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u8 reg_pld_table3;
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u8 reg_pld_table4;
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u8 reg_advance;
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};
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struct sx150x_789_pri {
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u8 reg_drain;
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u8 reg_polarity;
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u8 reg_clock;
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u8 reg_misc;
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u8 reg_reset;
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u8 ngpios;
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};
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struct sx150x_device_data {
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u8 model;
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u8 reg_pullup;
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u8 reg_pulldn;
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u8 reg_dir;
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u8 reg_data;
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u8 reg_irq_mask;
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u8 reg_irq_src;
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u8 reg_sense;
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u8 reg_clock;
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u8 reg_misc;
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u8 reg_reset;
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u8 ngpios;
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union {
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struct sx150x_456_pri x456;
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struct sx150x_789_pri x789;
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} pri;
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};
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struct sx150x_chip {
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@ -59,40 +82,67 @@ struct sx150x_chip {
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static const struct sx150x_device_data sx150x_devices[] = {
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[0] = { /* sx1508q */
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.reg_pullup = 0x03,
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.reg_pulldn = 0x04,
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.reg_drain = 0x05,
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.reg_polarity = 0x06,
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.reg_dir = 0x07,
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.reg_data = 0x08,
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.reg_irq_mask = 0x09,
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.reg_irq_src = 0x0c,
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.reg_sense = 0x0b,
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.reg_clock = 0x0f,
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.reg_misc = 0x10,
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.reg_reset = 0x7d,
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.ngpios = 8
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.model = SX150X_789,
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.reg_pullup = 0x03,
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.reg_pulldn = 0x04,
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.reg_dir = 0x07,
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.reg_data = 0x08,
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.reg_irq_mask = 0x09,
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.reg_irq_src = 0x0c,
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.reg_sense = 0x0b,
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.pri.x789 = {
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.reg_drain = 0x05,
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.reg_polarity = 0x06,
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.reg_clock = 0x0f,
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.reg_misc = 0x10,
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.reg_reset = 0x7d,
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},
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.ngpios = 8,
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},
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[1] = { /* sx1509q */
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.reg_pullup = 0x07,
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.reg_pulldn = 0x09,
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.reg_drain = 0x0b,
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.reg_polarity = 0x0d,
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.reg_dir = 0x0f,
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.reg_data = 0x11,
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.reg_irq_mask = 0x13,
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.reg_irq_src = 0x19,
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.reg_sense = 0x17,
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.reg_clock = 0x1e,
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.reg_misc = 0x1f,
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.reg_reset = 0x7d,
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.ngpios = 16
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.model = SX150X_789,
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.reg_pullup = 0x07,
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.reg_pulldn = 0x09,
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.reg_dir = 0x0f,
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.reg_data = 0x11,
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.reg_irq_mask = 0x13,
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.reg_irq_src = 0x19,
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.reg_sense = 0x17,
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.pri.x789 = {
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.reg_drain = 0x0b,
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.reg_polarity = 0x0d,
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.reg_clock = 0x1e,
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.reg_misc = 0x1f,
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.reg_reset = 0x7d,
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},
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.ngpios = 16
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},
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[2] = { /* sx1506q */
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.model = SX150X_456,
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.reg_pullup = 0x05,
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.reg_pulldn = 0x07,
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.reg_dir = 0x03,
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.reg_data = 0x01,
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.reg_irq_mask = 0x09,
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.reg_irq_src = 0x0f,
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.reg_sense = 0x0d,
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.pri.x456 = {
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.reg_pld_mode = 0x21,
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.reg_pld_table0 = 0x23,
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.reg_pld_table1 = 0x25,
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.reg_pld_table2 = 0x27,
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.reg_pld_table3 = 0x29,
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.reg_pld_table4 = 0x2b,
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.reg_advance = 0xad,
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},
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.ngpios = 16
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},
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};
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static const struct i2c_device_id sx150x_id[] = {
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{"sx1508q", 0},
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{"sx1509q", 1},
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{"sx1506q", 2},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, sx150x_id);
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@ -191,7 +241,7 @@ static int sx150x_get_io(struct sx150x_chip *chip, unsigned offset)
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static void sx150x_set_oscio(struct sx150x_chip *chip, int val)
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{
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sx150x_i2c_write(chip->client,
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chip->dev_cfg->reg_clock,
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chip->dev_cfg->pri.x789.reg_clock,
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(val ? 0x1f : 0x10));
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}
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@ -455,13 +505,13 @@ static int sx150x_reset(struct sx150x_chip *chip)
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int err;
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err = i2c_smbus_write_byte_data(chip->client,
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chip->dev_cfg->reg_reset,
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chip->dev_cfg->pri.x789.reg_reset,
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0x12);
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if (err < 0)
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return err;
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err = i2c_smbus_write_byte_data(chip->client,
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chip->dev_cfg->reg_reset,
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chip->dev_cfg->pri.x789.reg_reset,
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0x34);
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return err;
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}
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@ -477,9 +527,14 @@ static int sx150x_init_hw(struct sx150x_chip *chip,
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return err;
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}
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err = sx150x_i2c_write(chip->client,
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chip->dev_cfg->reg_misc,
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0x01);
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if (chip->dev_cfg->model == SX150X_789)
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err = sx150x_i2c_write(chip->client,
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chip->dev_cfg->pri.x789.reg_misc,
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0x01);
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else
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err = sx150x_i2c_write(chip->client,
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chip->dev_cfg->pri.x456.reg_advance,
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0x04);
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if (err < 0)
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return err;
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@ -493,15 +548,27 @@ static int sx150x_init_hw(struct sx150x_chip *chip,
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if (err < 0)
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return err;
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err = sx150x_init_io(chip, chip->dev_cfg->reg_drain,
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pdata->io_open_drain_ena);
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if (err < 0)
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return err;
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if (chip->dev_cfg->model == SX150X_789) {
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err = sx150x_init_io(chip,
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chip->dev_cfg->pri.x789.reg_drain,
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pdata->io_open_drain_ena);
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if (err < 0)
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return err;
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err = sx150x_init_io(chip,
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chip->dev_cfg->pri.x789.reg_polarity,
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pdata->io_polarity);
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if (err < 0)
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return err;
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} else {
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/* Set all pins to work in normal mode */
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err = sx150x_init_io(chip,
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chip->dev_cfg->pri.x456.reg_pld_mode,
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0);
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if (err < 0)
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return err;
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}
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err = sx150x_init_io(chip, chip->dev_cfg->reg_polarity,
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pdata->io_polarity);
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if (err < 0)
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return err;
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if (pdata->oscio_is_gpo)
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sx150x_set_oscio(chip, 0);
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