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usb: phy: tegra: get ULPI reset GPIO info using DT. 

As GPIO information is avail through DT, used it to get Tegra ULPI
reset GPIO number. Added a new member to tegra_usb_phy structure to
store this number.

Signed-off-by: Venu Byravarasu <vbyravarasu@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Venu Byravarasu 2013-05-16 19:43:00 +05:30 committed by Felipe Balbi
parent 9cd9384c73
commit 12ea18e4f0
2 changed files with 12 additions and 14 deletions
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25
drivers/usb/phy/phy-tegra-usb.c
View File

@ -541,11 +541,10 @@ static int ulpi_phy_power_on(struct tegra_usb_phy *phy)
int ret;
unsigned long val;
void __iomem *base = phy->regs;
struct tegra_ulpi_config *config = phy->config;
gpio_direction_output(config->reset_gpio, 0);
gpio_direction_output(phy->reset_gpio, 0);
msleep(5);
gpio_direction_output(config->reset_gpio, 1);
gpio_direction_output(phy->reset_gpio, 1);
clk_prepare_enable(phy->clk);
msleep(1);
@ -603,10 +602,8 @@ static int ulpi_phy_power_on(struct tegra_usb_phy *phy)
static int ulpi_phy_power_off(struct tegra_usb_phy *phy)
{
struct tegra_ulpi_config *config = phy->config;
clk_disable(phy->clk);
return gpio_direction_output(config->reset_gpio, 0);
return gpio_direction_output(phy->reset_gpio, 0);
}
static int tegra_phy_init(struct usb_phy *x)
@ -622,18 +619,18 @@ static int tegra_phy_init(struct usb_phy *x)
pr_err("%s: can't get ulpi clock\n", __func__);
return PTR_ERR(phy->clk);
}
if (!gpio_is_valid(ulpi_config->reset_gpio))
ulpi_config->reset_gpio =
of_get_named_gpio(phy->dev->of_node,
"nvidia,phy-reset-gpio", 0);
if (!gpio_is_valid(ulpi_config->reset_gpio)) {
phy->reset_gpio =
of_get_named_gpio(phy->dev->of_node,
"nvidia,phy-reset-gpio", 0);
if (!gpio_is_valid(phy->reset_gpio)) {
pr_err("%s: invalid reset gpio: %d\n", __func__,
ulpi_config->reset_gpio);
phy->reset_gpio);
err = -EINVAL;
goto err1;
}
gpio_request(ulpi_config->reset_gpio, "ulpi_phy_reset_b");
gpio_direction_output(ulpi_config->reset_gpio, 0);
gpio_request(phy->reset_gpio, "ulpi_phy_reset_b");
gpio_direction_output(phy->reset_gpio, 0);
phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0);
phy->ulpi->io_priv = phy->regs + ULPI_VIEWPORT;
} else {

1
include/linux/usb/tegra_usb_phy.h
View File

@ -62,6 +62,7 @@ struct tegra_usb_phy {
struct device *dev;
bool is_legacy_phy;
bool is_ulpi_phy;
int reset_gpio;
void (*set_pts)(struct usb_phy *x, u8 pts_val);
void (*set_phcd)(struct usb_phy *x, bool enable);
};