Re: [PATCH 3/8] clk: qcom: gcc: Add PCIe, EMAC and UFS GDSCs for SM8150

Bjorn Andersson
2022-02-01T00:09:47Z

On Wed 26 Jan 16:17 CST 2022, Bhupesh Sharma wrote:

> This adds the PCIe, EMAC and UFS GDSC structures for
> SM8150. The GDSC will allow the respective system to be
> brought out of reset.
>
> Cc: Stephen Boyd <sboyd@kernel.org>
> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
> ---
> drivers/clk/qcom/gcc-sm8150.c | 74 +++++++++++++++++----
> include/dt-bindings/clock/qcom,gcc-sm8150.h | 9 ++-
> 2 files changed, 69 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/clk/qcom/gcc-sm8150.c b/drivers/clk/qcom/gcc-sm8150.c
> index 245794485719..ada755ad55f7 100644
> --- a/drivers/clk/qcom/gcc-sm8150.c
> +++ b/drivers/clk/qcom/gcc-sm8150.c
> @@ -3448,22 +3448,67 @@ static struct clk_branch gcc_video_xo_clk = {
> },
> };
>
> +static struct gdsc emac_gdsc = {
> + .gdscr = 0x6004,
> + .pd = {
> + .name = "emac_gdsc",
> + },
> + .pwrsts = PWRSTS_OFF_ON,
> + .flags = POLL_CFG_GDSCR,
> +};
> +
> +static struct gdsc pcie_0_gdsc = {
> + .gdscr = 0x6b004,
> + .pd = {
> + .name = "pcie_0_gdsc",
> + },
> + .pwrsts = PWRSTS_OFF_ON,
> + .flags = POLL_CFG_GDSCR,
> +};
> +
> +static struct gdsc pcie_1_gdsc = {
> + .gdscr = 0x8d004,
> + .pd = {
> + .name = "pcie_1_gdsc",
> + },
> + .pwrsts = PWRSTS_OFF_ON,
> + .flags = POLL_CFG_GDSCR,
> +};
> +
> +static struct gdsc ufs_card_gdsc = {
> + .gdscr = 0x75004,
> + .pd = {
> + .name = "ufs_card_gdsc",
> + },
> + .pwrsts = PWRSTS_OFF_ON,
> + .flags = POLL_CFG_GDSCR,
> +};
> +
> +static struct gdsc ufs_phy_gdsc = {
> + .gdscr = 0x77004,
> + .pd = {
> + .name = "ufs_phy_gdsc",
> + },
> + .pwrsts = PWRSTS_OFF_ON,
> + .flags = POLL_CFG_GDSCR,
> +};
> +
> static struct gdsc usb30_prim_gdsc = {
> - .gdscr = 0xf004,
> - .pd = {
> - .name = "usb30_prim_gdsc",
> - },
> - .pwrsts = PWRSTS_OFF_ON,
> - .flags = POLL_CFG_GDSCR,
> + .gdscr = 0xf004,
> + .pd = {
> + .name = "usb30_prim_gdsc",
> + },
> + .pwrsts = PWRSTS_OFF_ON,
> + .flags = POLL_CFG_GDSCR,
> };
>
> static struct gdsc usb30_sec_gdsc = {
> - .gdscr = 0x10004,
> - .pd = {
> - .name = "usb30_sec_gdsc",
> - },
> - .pwrsts = PWRSTS_OFF_ON,
> - .flags = POLL_CFG_GDSCR,
> + .gdscr = 0x10004,
> + .pd = {
> + .name = "usb30_sec_gdsc",
> + },
> + .pwrsts = PWRSTS_OFF_ON,
> + .flags = POLL_CFG_GDSCR,
> };
>
> static struct clk_regmap *gcc_sm8150_clocks[] = {
> @@ -3714,6 +3759,11 @@ static const struct qcom_reset_map gcc_sm8150_resets[] = {
> };
>
> static struct gdsc *gcc_sm8150_gdscs[] = {
> + [EMAC_GDSC] = &emac_gdsc,
> + [PCIE_0_GDSC] = &pcie_0_gdsc,
> + [PCIE_1_GDSC] = &pcie_1_gdsc,
> + [UFS_CARD_GDSC] = &ufs_card_gdsc,
> + [UFS_PHY_GDSC] = &ufs_phy_gdsc,
> [USB30_PRIM_GDSC] = &usb30_prim_gdsc,
> [USB30_SEC_GDSC] = &usb30_sec_gdsc,
> };
> diff --git a/include/dt-bindings/clock/qcom,gcc-sm8150.h b/include/dt-bindings/clock/qcom,gcc-sm8150.h
> index 3e1a91876610..35d80ae411a0 100644
> --- a/include/dt-bindings/clock/qcom,gcc-sm8150.h
> +++ b/include/dt-bindings/clock/qcom,gcc-sm8150.h
> @@ -241,7 +241,12 @@
> #define GCC_USB_PHY_CFG_AHB2PHY_BCR 28
>
> /* GCC GDSCRs */
> -#define USB30_PRIM_GDSC 4
> -#define USB30_SEC_GDSC 5

These constants goes into .dtb files as numbers (4 and 5), changing them
will cause annoying-to-debug bugs in the transition while people still
are testing a new kernel with last weeks dtb.

So please add the new constants without affecting these numbers.

Rest looks good.

Regards,
Bjorn

> +#define EMAC_GDSC 0
> +#define PCIE_0_GDSC 1
> +#define PCIE_1_GDSC 2
> +#define UFS_CARD_GDSC 3
> +#define UFS_PHY_GDSC 4
> +#define USB30_PRIM_GDSC 5
> +#define USB30_SEC_GDSC 6
>
> #endif
> --
> 2.34.1
>