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72 lines
2.2 KiB
Diff
72 lines
2.2 KiB
Diff
From a86bda9f8a7965f0cedd347a9c04800eb9f41ea3 Mon Sep 17 00:00:00 2001
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From: Vasudevan Murugesan <vmuruges@codeaurora.org>
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Date: Tue, 21 Jul 2015 10:22:38 +0530
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Subject: ipq806x: usb: Control USB master reset
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During removal of the glue layer(dwc3-of-simple),
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USB master reset is set to active and during insertion
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it is de-activated.
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Change-Id: I537dc810f6cb2a46664ee674840145066432b957
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Signed-off-by: Vasudevan Murugesan <vmuruges@codeaurora.org>
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(cherry picked from commit 4611e13580a216812f85f0801b95442d02eeb836)
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---
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drivers/usb/dwc3/dwc3-of-simple.c | 22 ++++++++++++++++++++++
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1 file changed, 12 insertions(+)
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(limited to 'drivers/usb/dwc3/dwc3-of-simple.c')
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--- a/drivers/usb/dwc3/dwc3-of-simple.c
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+++ b/drivers/usb/dwc3/dwc3-of-simple.c
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@@ -25,6 +25,7 @@
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/clk.h>
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+#include <linux/reset.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/pm_runtime.h>
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@@ -33,6 +34,8 @@ struct dwc3_of_simple {
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struct device *dev;
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struct clk **clks;
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int num_clocks;
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+ struct reset_control *mstr_rst_30_0;
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+ struct reset_control *mstr_rst_30_1;
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};
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static int dwc3_of_simple_clk_init(struct dwc3_of_simple *simple, int count)
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@@ -102,6 +105,20 @@ static int dwc3_of_simple_probe(struct p
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if (ret)
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return ret;
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+ simple->mstr_rst_30_0 = devm_reset_control_get(dev, "usb30_0_mstr_rst");
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+
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+ if (!IS_ERR(simple->mstr_rst_30_0))
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+ reset_control_deassert(simple->mstr_rst_30_0);
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+ else
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+ dev_dbg(simple->dev, "cannot get handle for USB PHY 0 master reset control\n");
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+
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+ simple->mstr_rst_30_1 = devm_reset_control_get(dev, "usb30_1_mstr_rst");
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+
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+ if (!IS_ERR(simple->mstr_rst_30_1))
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+ reset_control_deassert(simple->mstr_rst_30_1);
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+ else
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+ dev_dbg(simple->dev, "cannot get handle for USB PHY 1 master reset control\n");
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+
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ret = of_platform_populate(np, NULL, NULL, dev);
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if (ret) {
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for (i = 0; i < simple->num_clocks; i++) {
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@@ -130,6 +147,12 @@ static int dwc3_of_simple_remove(struct
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clk_put(simple->clks[i]);
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}
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+ if (!IS_ERR(simple->mstr_rst_30_0))
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+ reset_control_assert(simple->mstr_rst_30_0);
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+
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+ if (!IS_ERR(simple->mstr_rst_30_1))
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+ reset_control_assert(simple->mstr_rst_30_1);
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+
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of_platform_depopulate(dev);
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pm_runtime_disable(dev);
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