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ipq806x: usb: Control USB master reset

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Picking commit from QSDK
https://source.codeaurora.org/quic/qsdk/oss/kernel/linux-msm/commit/?h=eggplant&id=a86bda9f8a7965f0cedd347a9c04800eb9f41ea3

Commit message:
"During removal of the glue layer(dwc3-of-simple), USB master reset is set to active and during insertion it is de-activated."

Change-Id: I537dc810f6cb2a46664ee674840145066432b957
Signed-off-by: Vasudevan Murugesan <vmuruges@codeaurora.org>
(cherry picked from commit 4611e13580a216812f85f0801b95442d02eeb836)"

Signed-off-by: Pavel Kubelun <be.dissent@gmail.com>
This commit is contained in:
Pavel Kubelun 2017-06-15 13:00:18 +03:00 committed by Felix Fietkau
parent 6617f3c6ab
commit de748a121e
2 changed files with 67 additions and 0 deletions
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3
target/linux/ipq806x/files-4.9/arch/arm/boot/dts/qcom-ipq8064.dtsi
View file

@ -967,6 +967,9 @@
ranges;
resets = <&gcc USB30_0_MASTER_RESET>;
reset-names = "usb30_mstr_rst";
status = "disabled";
dwc3@11000000 {

64
target/linux/ipq806x/patches-4.9/0074-ipq806x-usb-Control-USB-master-reset.patch Normal file
View file

@ -0,0 +1,64 @@
From a86bda9f8a7965f0cedd347a9c04800eb9f41ea3 Mon Sep 17 00:00:00 2001
From: Vasudevan Murugesan <vmuruges@codeaurora.org>
Date: Tue, 21 Jul 2015 10:22:38 +0530
Subject: ipq806x: usb: Control USB master reset
During removal of the glue layer(dwc3-of-simple),
USB master reset is set to active and during insertion
it is de-activated.
Change-Id: I537dc810f6cb2a46664ee674840145066432b957
Signed-off-by: Vasudevan Murugesan <vmuruges@codeaurora.org>
(cherry picked from commit 4611e13580a216812f85f0801b95442d02eeb836)
---
drivers/usb/dwc3/dwc3-of-simple.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
(limited to 'drivers/usb/dwc3/dwc3-of-simple.c')
diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c
index f9e92ef..49bf556 100644
--- a/drivers/usb/dwc3/dwc3-of-simple.c
+++ b/drivers/usb/dwc3/dwc3-of-simple.c
@@ -26,6 +26,7 @@
#include <linux/dma-mapping.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
+#include <linux/reset.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/pm_runtime.h>
@@ -34,6 +35,7 @@ struct dwc3_of_simple {
struct device *dev;
struct clk **clks;
int num_clocks;
+ struct reset_control *mstr_rst;
};
static int dwc3_of_simple_probe(struct platform_device *pdev)
@@ -89,6 +91,13 @@ static int dwc3_of_simple_probe(struct platform_device *pdev)
simple->clks[i] = clk;
}
+ simple->mstr_rst = devm_reset_control_get(dev, "usb30_mstr_rst");
+
+ if (!IS_ERR(simple->mstr_rst))
+ reset_control_deassert(simple->mstr_rst);
+ else
+ dev_dbg(simple->dev, "cannot get handle for master reset control\n");
+
ret = of_platform_populate(np, NULL, NULL, dev);
if (ret) {
for (i = 0; i < simple->num_clocks; i++) {
@@ -117,6 +126,9 @@ static int dwc3_of_simple_remove(struct platform_device *pdev)
clk_put(simple->clks[i]);
}
+ if (!IS_ERR(simple->mstr_rst))
+ reset_control_assert(simple->mstr_rst);
+
of_platform_depopulate(dev);
pm_runtime_put_sync(dev);
--
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