* [PATCH v3] usb: dwc3: Add support to reset usb ULPI phy
@ 2022-07-08 9:21 Michal Simek
2022-07-08 10:12 ` Marek Vasut
0 siblings, 1 reply; 3+ messages in thread
From: Michal Simek @ 2022-07-08 9:21 UTC (permalink / raw)
To: u-boot, git, Marek Vasut
Cc: T Karthik Reddy, Angus Ainslie, Jan Kiszka, Simon Glass
From: T Karthik Reddy <t.karthik.reddy@xilinx.com>
When usb PHY initialization is done, the PHY need to be reset.
Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
---
Changes in v3:
- Fix compilation issues reported by CI and Marek
- Use CONFIG_IS_ENABLED(DM_GPIO) and remove Kconfig dependency
Changes in v2:
- Remove EBUSY checking which is not needed. Reported by Bin
The patch depends on
https://lore.kernel.org/all/152354d05f56c57a21a6306745051a0961ea3c66.1657271690.git.michal.simek@amd.com/
---
drivers/usb/dwc3/dwc3-generic.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c
index c5310e465cbf..466b25a0c38e 100644
--- a/drivers/usb/dwc3/dwc3-generic.c
+++ b/drivers/usb/dwc3/dwc3-generic.c
@@ -26,6 +26,7 @@
#include <reset.h>
#include <clk.h>
#include <usb/xhci.h>
+#include <asm/gpio.h>
struct dwc3_glue_data {
struct clk_bulk clks;
@@ -43,6 +44,7 @@ struct dwc3_generic_priv {
void *base;
struct dwc3 dwc3;
struct phy_bulk phys;
+ struct gpio_desc ulpi_reset;
};
struct dwc3_generic_host_priv {
@@ -78,6 +80,27 @@ static int dwc3_generic_probe(struct udevice *dev,
if (rc && rc != -ENOTSUPP)
return rc;
+ if (CONFIG_IS_ENABLED(DM_GPIO) &&
+ device_is_compatible(dev->parent, "xlnx,zynqmp-dwc3")) {
+ rc = gpio_request_by_name(dev->parent, "reset-gpios", 0,
+ &priv->ulpi_reset, GPIOD_ACTIVE_LOW);
+ if (rc)
+ return rc;
+
+ /* Toggle ulpi to reset the phy. */
+ rc = dm_gpio_set_value(&priv->ulpi_reset, 1);
+ if (rc)
+ return rc;
+
+ mdelay(5);
+
+ rc = dm_gpio_set_value(&priv->ulpi_reset, 0);
+ if (rc)
+ return rc;
+
+ mdelay(5);
+ }
+
if (device_is_compatible(dev->parent, "rockchip,rk3399-dwc3"))
reset_deassert_bulk(&glue->resets);
@@ -99,6 +122,13 @@ static int dwc3_generic_remove(struct udevice *dev,
{
struct dwc3 *dwc3 = &priv->dwc3;
+ if (CONFIG_IS_ENABLED(DM_GPIO) &&
+ device_is_compatible(dev->parent, "xlnx,zynqmp-dwc3")) {
+ struct gpio_desc *ulpi_reset = &priv->ulpi_reset;
+
+ dm_gpio_free(ulpi_reset->dev, ulpi_reset);
+ }
+
dwc3_remove(dwc3);
dwc3_shutdown_phy(dev, &priv->phys);
unmap_physmem(dwc3->regs, MAP_NOCACHE);
--
2.36.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v3] usb: dwc3: Add support to reset usb ULPI phy
2022-07-08 9:21 [PATCH v3] usb: dwc3: Add support to reset usb ULPI phy Michal Simek
@ 2022-07-08 10:12 ` Marek Vasut
2022-07-08 10:20 ` Michal Simek
0 siblings, 1 reply; 3+ messages in thread
From: Marek Vasut @ 2022-07-08 10:12 UTC (permalink / raw)
To: Michal Simek, u-boot, git
Cc: T Karthik Reddy, Angus Ainslie, Jan Kiszka, Simon Glass
On 7/8/22 11:21, Michal Simek wrote:
> From: T Karthik Reddy <t.karthik.reddy@xilinx.com>
>
> When usb PHY initialization is done, the PHY need to be reset.
Michal, please verify this compiles in CI.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v3] usb: dwc3: Add support to reset usb ULPI phy
2022-07-08 10:12 ` Marek Vasut
@ 2022-07-08 10:20 ` Michal Simek
0 siblings, 0 replies; 3+ messages in thread
From: Michal Simek @ 2022-07-08 10:20 UTC (permalink / raw)
To: Marek Vasut, u-boot, git
Cc: T Karthik Reddy, Angus Ainslie, Jan Kiszka, Simon Glass
On 7/8/22 12:12, Marek Vasut wrote:
> On 7/8/22 11:21, Michal Simek wrote:
>> From: T Karthik Reddy <t.karthik.reddy@xilinx.com>
>>
>> When usb PHY initialization is done, the PHY need to be reset.
>
> Michal, please verify this compiles in CI.
I did it yesterday.
https://source.denx.de/u-boot/custodians/u-boot-microblaze/-/pipelines/12650
And my full queue is running just now.
https://source.denx.de/u-boot/custodians/u-boot-microblaze/-/pipelines/12652
M
^ permalink raw reply [flat|nested] 3+ messages in thread
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2022-07-08 9:21 [PATCH v3] usb: dwc3: Add support to reset usb ULPI phy Michal Simek
2022-07-08 10:12 ` Marek Vasut
2022-07-08 10:20 ` Michal Simek
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