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net: pch_gbe: Convert to use GPIO descriptors

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This switches the PCH GBE driver to use GPIO descriptors.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Flavio Suligoi <f.suligoi@asem.it>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andy Shevchenko 2021-05-10 19:39:28 +03:00 committed by David S. Miller
parent 9e3617a7b8
commit aca6a8746c
1 changed files with 32 additions and 12 deletions
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44
drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
View file

@ -8,6 +8,9 @@
#include "pch_gbe.h"
#include "pch_gbe_phy.h"
#include <linux/gpio/consumer.h>
#include <linux/gpio/machine.h>
#include <linux/module.h>
#include <linux/net_tstamp.h>
#include <linux/ptp_classify.h>
@ -97,8 +100,6 @@ const char pch_driver_version[] = DRV_VERSION;
#define PTP_L4_MULTICAST_SA "01:00:5e:00:01:81"
#define PTP_L2_MULTICAST_SA "01:1b:19:00:00:00"
#define MINNOW_PHY_RESET_GPIO 13
static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg);
static void pch_gbe_mdio_write(struct net_device *netdev, int addr, int reg,
int data);
@ -2628,26 +2629,45 @@ static int pch_gbe_probe(struct pci_dev *pdev,
return ret;
}
static void pch_gbe_gpio_remove_table(void *table)
{
gpiod_remove_lookup_table(table);
}
static int pch_gbe_gpio_add_table(struct device *dev, void *table)
{
gpiod_add_lookup_table(table);
return devm_add_action_or_reset(dev, pch_gbe_gpio_remove_table, table);
}
static struct gpiod_lookup_table pch_gbe_minnow_gpio_table = {
.dev_id = "0000:02:00.1",
.table = {
GPIO_LOOKUP("sch_gpio.33158", 13, NULL, GPIO_ACTIVE_LOW),
{}
},
};
/* The AR803X PHY on the MinnowBoard requires a physical pin to be toggled to
* ensure it is awake for probe and init. Request the line and reset the PHY.
*/
static int pch_gbe_minnow_platform_init(struct pci_dev *pdev)
{
unsigned long flags = GPIOF_OUT_INIT_HIGH;
unsigned gpio = MINNOW_PHY_RESET_GPIO;
struct gpio_desc *gpiod;
int ret;
ret = devm_gpio_request_one(&pdev->dev, gpio, flags,
"minnow_phy_reset");
if (ret) {
dev_err(&pdev->dev,
"ERR: Can't request PHY reset GPIO line '%d'\n", gpio);
ret = pch_gbe_gpio_add_table(&pdev->dev, &pch_gbe_minnow_gpio_table);
if (ret)
return ret;
}
gpio_set_value(gpio, 0);
gpiod = devm_gpiod_get(&pdev->dev, NULL, GPIOD_OUT_HIGH);
if (IS_ERR(gpiod))
return dev_err_probe(&pdev->dev, PTR_ERR(gpiod),
"Can't request PHY reset GPIO line\n");
gpiod_set_value(gpiod, 1);
usleep_range(1250, 1500);
gpio_set_value(gpio, 1);
gpiod_set_value(gpiod, 0);
usleep_range(1250, 1500);
return ret;