diff options
| author | Martin Schiller <ms@dev.tdt.de> | 2018-11-14 14:54:49 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-11-17 07:25:22 +0300 |
| commit | dfa0d55ff6be64e7b6881212a291cb95f8da3b08 (patch) | |
| tree | 80fd87024443e7b4b8e3c151d8a1ffc5dc7429c8 /drivers/net/phy/mdio-gpio.c | |
| parent | 19ab69107d3ecfb7cd3e38ad262a881be40c01a3 (diff) | |
| download | linux-dfa0d55ff6be64e7b6881212a291cb95f8da3b08.tar.xz | |
net: phy: mdio-gpio: Fix working over slow can_sleep GPIOs
This commit re-enables support for slow GPIO pins. It was initially
introduced by commit 2d6c9091ab76 ("net: mdio-gpio: support access that
may sleep") and got lost by commit 7e5fbd1e0700 ("net: mdio-gpio:
Convert to use gpiod functions where possible").
Also add a warning about slow GPIO pins like it is done in i2c-gpio.
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy/mdio-gpio.c')
| -rw-r--r-- | drivers/net/phy/mdio-gpio.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/net/phy/mdio-gpio.c b/drivers/net/phy/mdio-gpio.c index 33265747bf39..3a5a24daf384 100644 --- a/drivers/net/phy/mdio-gpio.c +++ b/drivers/net/phy/mdio-gpio.c @@ -63,7 +63,7 @@ static void mdio_dir(struct mdiobb_ctrl *ctrl, int dir) * assume the pin serves as pull-up. If direction is * output, the default value is high. */ - gpiod_set_value(bitbang->mdo, 1); + gpiod_set_value_cansleep(bitbang->mdo, 1); return; } @@ -78,7 +78,7 @@ static int mdio_get(struct mdiobb_ctrl *ctrl) struct mdio_gpio_info *bitbang = container_of(ctrl, struct mdio_gpio_info, ctrl); - return gpiod_get_value(bitbang->mdio); + return gpiod_get_value_cansleep(bitbang->mdio); } static void mdio_set(struct mdiobb_ctrl *ctrl, int what) @@ -87,9 +87,9 @@ static void mdio_set(struct mdiobb_ctrl *ctrl, int what) container_of(ctrl, struct mdio_gpio_info, ctrl); if (bitbang->mdo) - gpiod_set_value(bitbang->mdo, what); + gpiod_set_value_cansleep(bitbang->mdo, what); else - gpiod_set_value(bitbang->mdio, what); + gpiod_set_value_cansleep(bitbang->mdio, what); } static void mdc_set(struct mdiobb_ctrl *ctrl, int what) @@ -97,7 +97,7 @@ static void mdc_set(struct mdiobb_ctrl *ctrl, int what) struct mdio_gpio_info *bitbang = container_of(ctrl, struct mdio_gpio_info, ctrl); - gpiod_set_value(bitbang->mdc, what); + gpiod_set_value_cansleep(bitbang->mdc, what); } static const struct mdiobb_ops mdio_gpio_ops = { @@ -162,6 +162,10 @@ static int mdio_gpio_probe(struct platform_device *pdev) if (ret) return ret; + if (gpiod_cansleep(bitbang->mdc) || gpiod_cansleep(bitbang->mdio) || + gpiod_cansleep(bitbang->mdo)) + dev_warn(&pdev->dev, "Slow GPIO pins might wreak havoc into MDIO bus timing"); + if (pdev->dev.of_node) { bus_id = of_alias_get_id(pdev->dev.of_node, "mdio-gpio"); if (bus_id < 0) { |