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authorMarek Szyprowski <m.szyprowski@samsung.com>2018-11-20 16:38:15 +0100
committerFelipe Balbi <felipe.balbi@linux.intel.com>2018-12-05 11:09:08 +0200
commit35a6054132286a4ab92b536595093b82e6bdfcbc (patch)
tree07a979393b1dff5b9d313e71db0803d210c4e44e /drivers/usb/dwc2/params.c
parentb7a4fbe2300a8965ea760c7e871507b84aea17f6 (diff)
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usb: dwc2: Disable power down feature on Samsung SoCs
Power down feature of DWC2 module integrated in Samsung SoCs doesn't work properly or needs some additional handling in PHY or SoC glue layer, so disable it for now. Without disabling power down, DWC2 causes random memory trashes and fails enumeration if there is no USB link to host on driver probe. Fixes: 03ea6d6e9e1ff1 ("usb: dwc2: Enable power down") Acked-by: Minas Harutyunyan <hminas@synopsys.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc2/params.c')
-rw-r--r--drivers/usb/dwc2/params.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index 7c1b6938f212..266157ae179a 100644
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c
@@ -71,6 +71,13 @@ static void dwc2_set_his_params(struct dwc2_hsotg *hsotg)
p->power_down = false;
}
+static void dwc2_set_s3c6400_params(struct dwc2_hsotg *hsotg)
+{
+ struct dwc2_core_params *p = &hsotg->params;
+
+ p->power_down = 0;
+}
+
static void dwc2_set_rk_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
@@ -151,7 +158,8 @@ const struct of_device_id dwc2_of_match_table[] = {
{ .compatible = "lantiq,arx100-usb", .data = dwc2_set_ltq_params },
{ .compatible = "lantiq,xrx200-usb", .data = dwc2_set_ltq_params },
{ .compatible = "snps,dwc2" },
- { .compatible = "samsung,s3c6400-hsotg" },
+ { .compatible = "samsung,s3c6400-hsotg",
+ .data = dwc2_set_s3c6400_params },
{ .compatible = "amlogic,meson8-usb",
.data = dwc2_set_amlogic_params },
{ .compatible = "amlogic,meson8b-usb",