diff options
Diffstat (limited to 'drivers/net/ethernet/davicom/dm9000.c')
| -rw-r--r-- | drivers/net/ethernet/davicom/dm9000.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/net/ethernet/davicom/dm9000.c b/drivers/net/ethernet/davicom/dm9000.c index ef0bb58750e6..c0a7813603c3 100644 --- a/drivers/net/ethernet/davicom/dm9000.c +++ b/drivers/net/ethernet/davicom/dm9000.c @@ -36,6 +36,9 @@ #include <linux/platform_device.h> #include <linux/irq.h> #include <linux/slab.h> +#include <linux/regulator/consumer.h> +#include <linux/gpio.h> +#include <linux/of_gpio.h> #include <asm/delay.h> #include <asm/irq.h> @@ -1426,11 +1429,48 @@ dm9000_probe(struct platform_device *pdev) struct dm9000_plat_data *pdata = dev_get_platdata(&pdev->dev); struct board_info *db; /* Point a board information structure */ struct net_device *ndev; + struct device *dev = &pdev->dev; const unsigned char *mac_src; int ret = 0; int iosize; int i; u32 id_val; + int reset_gpios; + enum of_gpio_flags flags; + struct regulator *power; + + power = devm_regulator_get(dev, "vcc"); + if (IS_ERR(power)) { + if (PTR_ERR(power) == -EPROBE_DEFER) + return -EPROBE_DEFER; + dev_dbg(dev, "no regulator provided\n"); + } else { + ret = regulator_enable(power); + if (ret != 0) { + dev_err(dev, + "Failed to enable power regulator: %d\n", ret); + return ret; + } + dev_dbg(dev, "regulator enabled\n"); + } + + reset_gpios = of_get_named_gpio_flags(dev->of_node, "reset-gpios", 0, + &flags); + if (gpio_is_valid(reset_gpios)) { + ret = devm_gpio_request_one(dev, reset_gpios, flags, + "dm9000_reset"); + if (ret) { + dev_err(dev, "failed to request reset gpio %d: %d\n", + reset_gpios, ret); + return -ENODEV; + } + + /* According to manual PWRST# Low Period Min 1ms */ + msleep(2); + gpio_set_value(reset_gpios, 1); + /* Needs 3ms to read eeprom when PWRST is deasserted */ + msleep(4); + } if (!pdata) { pdata = dm9000_parse_dt(&pdev->dev); |