diff options
| author |   Ivan T. Ivanov <iivanov@mm-sol.com> | 2014-04-28 16:34:16 +0300 |
|---|---|---|
| committer |   Felipe Balbi <balbi@ti.com> | 2014-04-30 11:28:45 -0500 |
| commit | a27345434134080273e0597e1d9721ff9e6ca67f (patch) | |
| tree | 14d28a96a945c76da3b257de3fe2fec24195a276 | |
| parent | usb: phy: msm: Add device tree support and binding information (diff) | |
| download | linux-dev-a27345434134080273e0597e1d9721ff9e6ca67f.tar.xz linux-dev-a27345434134080273e0597e1d9721ff9e6ca67f.zip | |
usb: phy: msm: Use reset framework for LINK and PHY resets
Using reset framework eliminate need of platform specific
callbacks and enable reset lines to be specified in DT files.
Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
| -rw-r--r-- | drivers/usb/phy/phy-msm-usb.c | 29 | ||||
| -rw-r--r-- | include/linux/usb/msm_hsusb.h | 3 |
2 files changed, 24 insertions, 8 deletions
diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c index 1bf2d4ee29d2..a6abb1b3a7f0 100644 --- a/drivers/usb/phy/phy-msm-usb.c +++ b/drivers/usb/phy/phy-msm-usb.c @@ -32,6 +32,7 @@ #include <linux/pm_runtime.h> #include <linux/of.h> #include <linux/of_device.h> +#include <linux/reset.h> #include <linux/usb.h> #include <linux/usb/otg.h> @@ -235,12 +236,15 @@ static void ulpi_init(struct msm_otg *motg) static int msm_otg_link_clk_reset(struct msm_otg *motg, bool assert) { - int ret = 0; + int ret; - if (!motg->pdata->link_clk_reset) - return ret; + if (motg->pdata->link_clk_reset) + ret = motg->pdata->link_clk_reset(motg->clk, assert); + else if (assert) + ret = reset_control_assert(motg->link_rst); + else + ret = reset_control_deassert(motg->link_rst); - ret = motg->pdata->link_clk_reset(motg->clk, assert); if (ret) dev_err(motg->phy.dev, "usb link clk reset %s failed\n", assert ? "assert" : "deassert"); @@ -250,12 +254,13 @@ static int msm_otg_link_clk_reset(struct msm_otg *motg, bool assert) static int msm_otg_phy_clk_reset(struct msm_otg *motg) { - int ret = 0; + int ret; - if (!motg->pdata->phy_clk_reset) - return ret; + if (motg->pdata->phy_clk_reset) + ret = motg->pdata->phy_clk_reset(motg->phy_reset_clk); + else + ret = reset_control_reset(motg->phy_rst); - ret = motg->pdata->phy_clk_reset(motg->phy_reset_clk); if (ret) dev_err(motg->phy.dev, "usb phy clk reset failed\n"); @@ -1377,6 +1382,14 @@ static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg) id = of_match_device(msm_otg_dt_match, &pdev->dev); pdata->phy_type = (int) id->data; + motg->link_rst = devm_reset_control_get(&pdev->dev, "link"); + if (IS_ERR(motg->link_rst)) + return PTR_ERR(motg->link_rst); + + motg->phy_rst = devm_reset_control_get(&pdev->dev, "phy"); + if (IS_ERR(motg->phy_rst)) + return PTR_ERR(motg->phy_rst); + pdata->mode = of_usb_get_dr_mode(node); if (pdata->mode == USB_DR_MODE_UNKNOWN) pdata->mode = USB_DR_MODE_OTG; diff --git a/include/linux/usb/msm_hsusb.h b/include/linux/usb/msm_hsusb.h index bd68299c278e..4e5d9168f52e 100644 --- a/include/linux/usb/msm_hsusb.h +++ b/include/linux/usb/msm_hsusb.h @@ -165,6 +165,9 @@ struct msm_otg { struct regulator *v3p3; struct regulator *v1p8; struct regulator *vddcx; + + struct reset_control *phy_rst; + struct reset_control *link_rst; }; #endif |