diff options
| author | Vivek Gautam <vivek.gautam@codeaurora.org> | 2017-10-19 13:47:43 +0200 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2017-10-19 15:23:14 +0300 |
| commit | 06c47e6286d5afdd7b2e7e3c207f6906b3be3d4d (patch) | |
| tree | 62c79c3ebbfb0e4f8ff312504b9925256df10c59 /drivers/usb/dwc3 | |
| parent | d6d9c2a3eac279d0bf406573706b7e7cf9d7fdda (diff) | |
usb: dwc3: of-simple: Add support to get resets for the device
Add support to get a list of resets available for the device.
These resets must be kept de-asserted until the device is
in use.
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
[p.zabel@pengutronix.de: switch to hidden reset control array]
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc3')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-of-simple.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c index e129c3278081..ceea1619f8aa 100644 --- a/drivers/usb/dwc3/dwc3-of-simple.c +++ b/drivers/usb/dwc3/dwc3-of-simple.c @@ -28,11 +28,13 @@ #include <linux/of.h> #include <linux/of_platform.h> #include <linux/pm_runtime.h> +#include <linux/reset.h> struct dwc3_of_simple { struct device *dev; struct clk **clks; int num_clocks; + struct reset_control *resets; }; static int dwc3_of_simple_clk_init(struct dwc3_of_simple *simple, int count) @@ -95,10 +97,21 @@ static int dwc3_of_simple_probe(struct platform_device *pdev) platform_set_drvdata(pdev, simple); simple->dev = dev; + simple->resets = of_reset_control_array_get_optional_exclusive(np); + if (IS_ERR(simple->resets)) { + ret = PTR_ERR(simple->resets); + dev_err(dev, "failed to get device resets, err=%d\n", ret); + return ret; + } + + ret = reset_control_deassert(simple->resets); + if (ret) + goto err_resetc_put; + ret = dwc3_of_simple_clk_init(simple, of_count_phandle_with_args(np, "clocks", "#clock-cells")); if (ret) - return ret; + goto err_resetc_assert; ret = of_platform_populate(np, NULL, NULL, dev); if (ret) { @@ -107,7 +120,7 @@ static int dwc3_of_simple_probe(struct platform_device *pdev) clk_put(simple->clks[i]); } - return ret; + goto err_resetc_assert; } pm_runtime_set_active(dev); @@ -115,6 +128,13 @@ static int dwc3_of_simple_probe(struct platform_device *pdev) pm_runtime_get_sync(dev); return 0; + +err_resetc_assert: + reset_control_assert(simple->resets); + +err_resetc_put: + reset_control_put(simple->resets); + return ret; } static int dwc3_of_simple_remove(struct platform_device *pdev) @@ -130,6 +150,9 @@ static int dwc3_of_simple_remove(struct platform_device *pdev) clk_put(simple->clks[i]); } + reset_control_assert(simple->resets); + reset_control_put(simple->resets); + pm_runtime_put_sync(dev); pm_runtime_disable(dev); |