Re: [PATCH] clk: qcom: gcc-x1e80100: Keep GCC USB QTB clock always ON

[Dmitry Baryshkov]

On Mon, Mar 16, 2026 at 04:38:21PM +0530, Jagadeesh Kona wrote:
> Keep GCC USB QTB clock always ON which is required for SMMU
> invalidation on X1E80100 platform.
> 
> Signed-off-by: Jagadeesh Kona <jagadeesh.kona@xxxxxxxxxxxxxxxx>
> ---
>  drivers/clk/qcom/gcc-x1e80100.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/clk/qcom/gcc-x1e80100.c b/drivers/clk/qcom/gcc-x1e80100.c
> index 74afd12c158c01c121d9aecd56e65c0c302d7cd0..73a2a5112623e5190f41129af7fd76a86603557b 100644
> --- a/drivers/clk/qcom/gcc-x1e80100.c
> +++ b/drivers/clk/qcom/gcc-x1e80100.c
> @@ -7480,6 +7480,7 @@ static int gcc_x1e80100_probe(struct platform_device *pdev)
>  	qcom_branch_set_clk_en(regmap, 0x32004); /* GCC_VIDEO_AHB_CLK */
>  	qcom_branch_set_clk_en(regmap, 0x32030); /* GCC_VIDEO_XO_CLK */
>  	qcom_branch_set_clk_en(regmap, 0x71004); /* GCC_GPU_CFG_AHB_CLK */
> +	qcom_branch_set_clk_en(regmap, 0x7d01c); /* GCC_HLOS1_VOTE_AGGRE_NOC_MMU_USB_QTB_CLK */

Is it used during all SMMU invalidations or only for those related to
the USB controller?

>  
>  	/* Clear GDSC_SLEEP_ENA_VOTE to stop votes being auto-removed in sleep. */
>  	regmap_write(regmap, 0x52224, 0x0);
> 
> ---
> base-commit: b84a0ebe421ca56995ff78b66307667b62b3a900
> change-id: 20260316-hamoa-usb-qtb-clk-always-on-bcd4e5f3553e
> 
> Best regards,
> -- 
> Jagadeesh Kona <jagadeesh.kona@xxxxxxxxxxxxxxxx>
> 

-- 
With best wishes
Dmitry