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>
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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