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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>
This commit is contained in:
Ivan T. Ivanov 2014-04-28 16:34:16 +03:00 committed by Felipe Balbi
parent 8364f9af23
commit a273454341
2 changed files with 24 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/usb/phy/phy-msm-usb.c
View File

@ -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;

3
include/linux/usb/msm_hsusb.h
View File

@ -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