diff options
| author |   Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> | 2015-01-15 10:12:26 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-01-15 14:08:07 -0500 |
| commit | 7994fe55a4a2009d9e9153ded4ac4369d1adaaa3 (patch) | |
| tree | f7eaf4cb552146ab52065e5c7d13d63f1aebc8e1 /drivers/net/ethernet/davicom/dm9000.c | |
| parent | socket: use iov_length() (diff) | |
| download | linux-dev-7994fe55a4a2009d9e9153ded4ac4369d1adaaa3.tar.xz linux-dev-7994fe55a4a2009d9e9153ded4ac4369d1adaaa3.zip | |
dm9000: Add regulator and reset support to dm9000
In boards, the dm9000 chip's power and reset can be controlled by gpio.
It makes sense to add them to the dm9000 driver and let dt be used to
enable power and reset the phy.
Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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); |