From mboxrd@z Thu Jan 1 00:00:00 1970 From: Philipp Zabel Subject: [PATCH v7 3/4] usb: dwc3: of-simple: Add support to get resets for the device Date: Wed, 19 Jul 2017 17:59:07 +0200 Message-ID: <1500479948-29988-4-git-send-email-p.zabel@pengutronix.de> References: <1500479948-29988-1-git-send-email-p.zabel@pengutronix.de> Return-path: In-Reply-To: <1500479948-29988-1-git-send-email-p.zabel@pengutronix.de> Sender: linux-arm-msm-owner@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: Vivek Gautam , Jon Hunter , Felipe Balbi , Greg Kroah-Hartman , Thierry Reding , linux-tegra@vger.kernel.org, linux-usb@vger.kernel.org, linux-arm-msm@vger.kernel.org, kernel@pengutronix.de, Philipp Zabel List-Id: linux-tegra@vger.kernel.org From: Vivek Gautam 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. Cc: Felipe Balbi Signed-off-by: Vivek Gautam [p.zabel@pengutronix.de: switch to hidden reset control array] Signed-off-by: Philipp Zabel --- No changes since v6. --- drivers/usb/dwc3/dwc3-of-simple.c | 27 +++++++++++++++++++++++++-- 1 file changed, 25 insertions(+), 2 deletions(-) diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c index a9bac09d3750d..23d2221bde9df 100644 --- a/drivers/usb/dwc3/dwc3-of-simple.c +++ b/drivers/usb/dwc3/dwc3-of-simple.c @@ -29,11 +29,13 @@ #include #include #include +#include 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) @@ -96,9 +98,20 @@ 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_clk_get_parent_count(np)); 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); -- 2.11.0