diff options
| author | Phil Reid <preid@electromag.com.au> | 2016-08-31 15:31:38 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-09-01 20:53:31 +0100 |
| commit | f99008013e199e6b88ef26c98ecb042c94c7450c (patch) | |
| tree | 8d06d437619946dcdb853cae1e1af7f80a468596 /drivers/spi/spi-sc18is602.c | |
| parent | 29b4817d4018df78086157ea3a55c1d9424a7cfc (diff) | |
spi: sc18is602: Add reset control via gpio pin.
This sc18is602 has a reset pin that may need to be deasserted.
Add optional binding to specifiy the reset pin via a gpio and deassert
during probe.
Signed-off-by: Phil Reid <preid@electromag.com.au>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-sc18is602.c')
| -rw-r--r-- | drivers/spi/spi-sc18is602.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/spi/spi-sc18is602.c b/drivers/spi/spi-sc18is602.c index 36af4d48a700..5666b5d20b87 100644 --- a/drivers/spi/spi-sc18is602.c +++ b/drivers/spi/spi-sc18is602.c @@ -23,6 +23,7 @@ #include <linux/pm_runtime.h> #include <linux/of.h> #include <linux/platform_data/sc18is602.h> +#include <linux/gpio/consumer.h> enum chips { sc18is602, sc18is602b, sc18is603 }; @@ -50,6 +51,8 @@ struct sc18is602 { u8 buffer[SC18IS602_BUFSIZ + 1]; int tlen; /* Data queued for tx in buffer */ int rindex; /* Receive data index in buffer */ + + struct gpio_desc *reset; }; static int sc18is602_wait_ready(struct sc18is602 *hw, int len) @@ -257,6 +260,12 @@ static int sc18is602_probe(struct i2c_client *client, hw = spi_master_get_devdata(master); i2c_set_clientdata(client, hw); + /* assert reset and then release */ + hw->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(hw->reset)) + return PTR_ERR(hw->reset); + gpiod_set_value(hw->reset, 0); + hw->master = master; hw->client = client; hw->dev = dev; |