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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
net: mdio-gpio: Add support for separate MDI and MDO gpio pins
This is for a system with fixed assignments of input and output pins
(various variants of Kontron COMe).
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
authored by
Guenter Roeck
and committed by
David S. Miller
f1d54c47
1d251481
+33
-3
+31
-3
drivers/net/phy/mdio-gpio.c
+31
-3
drivers/net/phy/mdio-gpio.c
···
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struct mdio_gpio_info {
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struct mdiobb_ctrl ctrl;
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-
int mdc, mdio;
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int mdc_active_low, mdio_active_low;
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int mdc, mdio, mdo;
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int mdc_active_low, mdio_active_low, mdo_active_low;
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};
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static void *mdio_gpio_of_get_data(struct platform_device *pdev)
···
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pdata->mdio = ret;
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pdata->mdio_active_low = flags & OF_GPIO_ACTIVE_LOW;
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ret = of_get_gpio_flags(np, 2, &flags);
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if (ret > 0) {
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pdata->mdo = ret;
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pdata->mdo_active_low = flags & OF_GPIO_ACTIVE_LOW;
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}
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return pdata;
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}
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···
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{
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struct mdio_gpio_info *bitbang =
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container_of(ctrl, struct mdio_gpio_info, ctrl);
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if (bitbang->mdo) {
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/* Separate output pin. Always set its value to high
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* when changing direction. If direction is input,
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* assume the pin serves as pull-up. If direction is
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* output, the default value is high.
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*/
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gpio_set_value(bitbang->mdo, 1 ^ bitbang->mdo_active_low);
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return;
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}
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if (dir)
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gpio_direction_output(bitbang->mdio,
···
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struct mdio_gpio_info *bitbang =
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container_of(ctrl, struct mdio_gpio_info, ctrl);
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gpio_set_value(bitbang->mdio, what ^ bitbang->mdio_active_low);
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if (bitbang->mdo)
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gpio_set_value(bitbang->mdo, what ^ bitbang->mdo_active_low);
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else
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gpio_set_value(bitbang->mdio, what ^ bitbang->mdio_active_low);
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}
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static void mdc_set(struct mdiobb_ctrl *ctrl, int what)
···
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bitbang->mdc_active_low = pdata->mdc_active_low;
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bitbang->mdio = pdata->mdio;
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bitbang->mdio_active_low = pdata->mdio_active_low;
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bitbang->mdo = pdata->mdo;
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bitbang->mdo_active_low = pdata->mdo_active_low;
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new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
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if (!new_bus)
···
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if (devm_gpio_request(dev, bitbang->mdio, "mdio"))
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goto out_free_bus;
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+
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if (bitbang->mdo) {
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if (devm_gpio_request(dev, bitbang->mdo, "mdo"))
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goto out_free_bus;
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gpio_direction_output(bitbang->mdo, 1);
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gpio_direction_input(bitbang->mdio);
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}
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gpio_direction_output(bitbang->mdc, 0);
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