[PATCH v2 4/9] usb: chipidea: usb2: add optional reset support
From: Junzhong Pan <hidden>
Date: 2026-09-08 09:49:38
Also in:
linux-riscv, linux-usb, lkml, spacemit
Subsystem:
chipidea usb high speed dual role controller, the rest, usb subsystem · Maintainers:
Peter Chen, Linus Torvalds, Greg Kroah-Hartman
The USB2 controller of SpacemiT K1 SoC requires reset support, to keep compatibility, add optional reset support. Acked-by: Peter Chen <redacted> Tested-by: Ze Huang <redacted> Reviewed-by: Troy Mitchell <troy.mitchell@linux.spacemit.com> Signed-off-by: Junzhong Pan <redacted> --- drivers/usb/chipidea/ci_hdrc_usb2.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/usb/chipidea/ci_hdrc_usb2.c b/drivers/usb/chipidea/ci_hdrc_usb2.c
index 6fae2d4a053a..f81673edca3c 100644
--- a/drivers/usb/chipidea/ci_hdrc_usb2.c
+++ b/drivers/usb/chipidea/ci_hdrc_usb2.c@@ -12,6 +12,7 @@ #include <linux/phy/phy.h> #include <linux/platform_device.h> #include <linux/property.h> +#include <linux/reset.h> #include <linux/usb/chipidea.h> #include <linux/usb/hcd.h> #include <linux/usb/ulpi.h>
@@ -21,6 +22,7 @@ struct ci_hdrc_usb2_priv { struct platform_device *ci_pdev; struct clk *clk; + struct reset_control *reset; }; static const struct ci_hdrc_platform_data ci_default_pdata = {
@@ -75,6 +77,11 @@ static int ci_hdrc_usb2_probe(struct platform_device *pdev) return dev_err_probe(dev, PTR_ERR(priv->clk), "failed to get or enable the clock\n"); + priv->reset = devm_reset_control_get_optional_exclusive_deasserted(dev, NULL); + if (IS_ERR(priv->reset)) + return dev_err_probe(dev, PTR_ERR(priv->reset), + "failed to get or deassert the reset control\n"); + ci_pdata->name = dev_name(dev); priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
--
2.34.1