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| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2018-01-09 14:58:56 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2018-01-16 00:04:19 +0100 |
| commit | 8092178ffe67dbd1f987e2e308e871c774774a16 (patch) | |
| tree | ce87bba0677a51c8727e8a6d712e1b7125733796 /drivers/i2c | |
| parent | 6c92204e446694306198c7c394f3692bde46b696 (diff) | |
| download | linux-8092178ffe67dbd1f987e2e308e871c774774a16.tar.gz linux-8092178ffe67dbd1f987e2e308e871c774774a16.tar.bz2 linux-8092178ffe67dbd1f987e2e308e871c774774a16.zip | |
i2c: add 'set_sda' to bus_recovery_info
This will be needed when we want to create STOP conditions, too, later.
Create the needed fields and populate them for the GPIO case if the GPIO
is set to output.
Tested-by: Phil Reid <preid@electromag.com.au>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/i2c-core-base.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index bb34a5d41133..a8b3fbe16fa0 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -147,6 +147,11 @@ static int get_sda_gpio_value(struct i2c_adapter *adap) return gpiod_get_value_cansleep(adap->bus_recovery_info->sda_gpiod); } +static void set_sda_gpio_value(struct i2c_adapter *adap, int val) +{ + gpiod_set_value_cansleep(adap->bus_recovery_info->sda_gpiod, val); +} + /* * We are generating clock pulses. ndelay() determines durating of clk pulses. * We will generate clock with rate 100 KHz and so duration of both clock levels @@ -225,8 +230,12 @@ static void i2c_init_recovery(struct i2c_adapter *adap) if (bri->scl_gpiod && bri->recover_bus == i2c_generic_scl_recovery) { bri->get_scl = get_scl_gpio_value; bri->set_scl = set_scl_gpio_value; - if (bri->sda_gpiod) + if (bri->sda_gpiod) { bri->get_sda = get_sda_gpio_value; + /* FIXME: add proper flag instead of '0' once available */ + if (gpiod_get_direction(bri->sda_gpiod) == 0) + bri->set_sda = set_sda_gpio_value; + } return; } |