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linux (Allwinner): drop upstream usb3 patch

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This commit is contained in:
MilhouseVH 2019-08-02 09:12:42 +01:00
parent d9670c8ae8
commit ef3c0ef0b4
1 changed files with 0 additions and 68 deletions
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68
projects/Allwinner/patches/linux/0002-backport-from-5.3.patch
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@ -2525,71 +2525,3 @@ index 4802902e128f..9e464d40cbff 100644
-- --
2.21.0 2.21.0
From dc1b5d9aed1794b5a1c6b0da46e372cc09974cbc Mon Sep 17 00:00:00 2001
From: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Date: Thu, 13 Jun 2019 17:01:07 +0200
Subject: [PATCH] usb: dwc3: Fix core validation in probe, move after clocks
are enabled
The required clocks needs to be enabled before the first register
access. After commit fe8abf332b8f ("usb: dwc3: support clocks and resets
for DWC3 core"), this happens when the dwc3_core_is_valid function is
called, but the mentioned commit adds that call in the wrong place,
before the clocks are enabled. So, move that call after the
clk_bulk_enable() to ensure the clocks are enabled and the reset
deasserted.
I detected this while, as experiment, I tried to move the clocks and resets
from the glue layer to the DWC3 core on a Samsung Chromebook Plus.
That was not detected before because, in most cases, the glue layer
initializes SoC-specific things and then populates the child "snps,dwc3"
with those clocks already enabled.
Fixes: b873e2d0ea1ef ("usb: dwc3: Do core validation early on probe")
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
---
drivers/usb/dwc3/core.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 4aff1d8dbc4f..6e9e172010fc 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1423,11 +1423,6 @@ static int dwc3_probe(struct platform_device *pdev)
dwc->regs = regs;
dwc->regs_size = resource_size(&dwc_res);
- if (!dwc3_core_is_valid(dwc)) {
- dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
- return -ENODEV;
- }
-
dwc3_get_properties(dwc);
dwc->reset = devm_reset_control_get_optional_shared(dev, NULL);
@@ -1460,6 +1455,12 @@ static int dwc3_probe(struct platform_device *pdev)
if (ret)
goto unprepare_clks;
+ if (!dwc3_core_is_valid(dwc)) {
+ dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
+ ret = -ENODEV;
+ goto disable_clks;
+ }
+
platform_set_drvdata(pdev, dwc);
dwc3_cache_hwparams(dwc);
@@ -1525,6 +1526,7 @@ static int dwc3_probe(struct platform_device *pdev)
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
+disable_clks:
clk_bulk_disable(dwc->num_clks, dwc->clks);
unprepare_clks:
clk_bulk_unprepare(dwc->num_clks, dwc->clks);
--
2.22.0