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net: ravb: Add PHY reset GPIO support

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Add support for obtaining PHY reset GPIO from DT and toggling it
before configuring the PHY to put the PHY into defined state.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
This commit is contained in:
Marek Vasut 2017-09-15 21:11:15 +02:00 • committed by Nobuhiro Iwamatsu
parent 849ab0a66f
commit bddb44e94a
1 changed files with 13 additions and 0 deletions
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13
drivers/net/ravb.c
View file

@ -18,6 +18,7 @@
#include <linux/mii.h>
#include <wait_bit.h>
#include <asm/io.h>
#include <asm/gpio.h>
/* Registers */
#define RAVB_REG_CCC 0x000
@ -122,6 +123,7 @@ struct ravb_priv {
struct mii_dev *bus;
void __iomem *iobase;
struct clk clk;
struct gpio_desc reset_gpio;
};
static inline void ravb_flush_dcache(u32 addr, u32 len)
@ -302,6 +304,13 @@ static int ravb_phy_config(struct udevice *dev)
struct phy_device *phydev;
int mask = 0xffffffff, reg;
if (dm_gpio_is_valid(&eth->reset_gpio)) {
dm_gpio_set_value(&eth->reset_gpio, 1);
mdelay(20);
dm_gpio_set_value(&eth->reset_gpio, 0);
mdelay(1);
}
phydev = phy_find_by_mask(eth->bus, mask, pdata->phy_interface);
if (!phydev)
return -ENODEV;
@ -483,6 +492,9 @@ static int ravb_probe(struct udevice *dev)
if (ret < 0)
goto err_mdio_alloc;
gpio_request_by_name_nodev(dev_ofnode(dev), "reset-gpios", 0,
&eth->reset_gpio, GPIOD_IS_OUT);
mdiodev = mdio_alloc();
if (!mdiodev) {
ret = -ENOMEM;
@ -516,6 +528,7 @@ static int ravb_remove(struct udevice *dev)
free(eth->phydev);
mdio_unregister(eth->bus);
mdio_free(eth->bus);
dm_gpio_free(dev, &eth->reset_gpio);
unmap_physmem(eth->iobase, MAP_NOCACHE);
return 0;