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usb: dwc3: exynos: Add support for Exynos5433 variant with all clocks

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DWC3 variant found in Exynos5433 SoCs requires keeping all DRD30/UHOST30
clocks enabled all the time the driver does any access to DWC3 registers,
otherwise external abort happens. So far DWC3 hardware module worked with
samsung,exynos5250-dwusb3 compatible only by luck when built into kernel:
all DRD30 clocks were left enabled by bootloader and later kept enabled
by the DRD PHY driver. However, if one tried to use Exnos DWC3 driver as
a module or performed system suspend/resume cycle, external abort
happened. This patch finally fixes this issue.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Marek Szyprowski
2018-09-18 10:16:52 +02:00
committed by Felipe Balbi
parent 9f2168367a
commit 4c19cc1406
3 changed files with 12 additions and 0 deletions
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9
drivers/usb/dwc3/dwc3-exynos.c
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@@ -162,6 +162,12 @@ static const struct dwc3_exynos_driverdata exynos5250_drvdata = {
.suspend_clk_idx = -1,
};
static const struct dwc3_exynos_driverdata exynos5433_drvdata = {
.clk_names = { "aclk", "susp_clk", "pipe_pclk", "phyclk" },
.num_clks = 4,
.suspend_clk_idx = 1,
};
static const struct dwc3_exynos_driverdata exynos7_drvdata = {
.clk_names = { "usbdrd30", "usbdrd30_susp_clk", "usbdrd30_axius_clk" },
.num_clks = 3,
@@ -172,6 +178,9 @@ static const struct of_device_id exynos_dwc3_match[] = {
{
.compatible = "samsung,exynos5250-dwusb3",
.data = &exynos5250_drvdata,
}, {
.compatible = "samsung,exynos5433-dwusb3",
.data = &exynos5433_drvdata,
}, {
.compatible = "samsung,exynos7-dwusb3",
.data = &exynos7_drvdata,