summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorWei Chen <Wei.Chen@csr.com>2014-12-04 20:12:09 +0800
committerLinus Walleij <linus.walleij@linaro.org>2015-01-15 17:23:12 +0100
commitae9ca493ee2adaebc2bccd60fb6ccf93a214262c (patch)
treed152449e50d9c09ee5b2498d641c1243d4994600
parent093e9435483c8ad630a1432bfdcc10efe1c08a64 (diff)
downloadlinux-ae9ca493ee2adaebc2bccd60fb6ccf93a214262c.tar.bz2
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>
-rw-r--r--drivers/gpio/gpio-sx150x.c157
1 files changed, 112 insertions, 45 deletions
diff --git a/drivers/gpio/gpio-sx150x.c b/drivers/gpio/gpio-sx150x.c
index 0bc61c2bd079..b32fb38ac5c9 100644
--- a/drivers/gpio/gpio-sx150x.c
+++ b/drivers/gpio/gpio-sx150x.c
@@ -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 {
@@ -59,40 +82,67 @@ struct sx150x_chip {
static const struct sx150x_device_data sx150x_devices[] = {
[0] = { /* sx1508q */
- .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,
- .reg_clock = 0x0f,
- .reg_misc = 0x10,
- .reg_reset = 0x7d,
- .ngpios = 8
+ .model = SX150X_789,
+ .reg_pullup = 0x03,
+ .reg_pulldn = 0x04,
+ .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,
},
[1] = { /* sx1509q */
- .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,
- .reg_clock = 0x1e,
- .reg_misc = 0x1f,
- .reg_reset = 0x7d,
- .ngpios = 16
+ .model = SX150X_789,
+ .reg_pullup = 0x07,
+ .reg_pulldn = 0x09,
+ .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
},
};
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;
}
- err = sx150x_i2c_write(chip->client,
- chip->dev_cfg->reg_misc,
- 0x01);
+ if (chip->dev_cfg->model == SX150X_789)
+ err = sx150x_i2c_write(chip->client,
+ 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,
- pdata->io_open_drain_ena);
- if (err < 0)
- return err;
+ 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->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;
+ }
- err = sx150x_init_io(chip, chip->dev_cfg->reg_polarity,
- pdata->io_polarity);
- if (err < 0)
- return err;
if (pdata->oscio_is_gpo)
sx150x_set_oscio(chip, 0);