Hi Anand,
On 2024-07-29 14:37, Anand Moon wrote:
> Add missing pinctrl settings WAKE and CLKREQ for PCIe 3.0 x4, PCIe 3.0 x1
> and PCIe 2.1 x1 nodes. Each component of PCIe communication have the
> following control signals: PERST, WAKE, CLKREQ, and REFCLK.
> These signals work to generate high-speed signals and communicate with
> other PCIe devices. Used by root complex to endpoint depending on
> the power state.
>
> PERST# is referred to as a fundamental reset. PERST should be held
> low until all the power rails in the system and the reference clock
> are stable. A transition from low to high in this signal usually
> indicates the beginning of link initialization.
>
> WAKE# signal is an active-low signal that is used to return the PCIe
> interface to an active state when in a low-power state.
>
> CLKREQ# signal is also an active-low signal and is used to request the
> reference clock. L1 sub-states is providing a digital signal
> (CLKREQ#) for PHYs to use to wake up and resume normal operation.
>
> Signed-off-by: Anand Moon <linux.amoon@xxxxxxxxx>
> ---
> v5: Merged all 3 patch into single patch, reabse on master
> Fix the $subject and commit message.
> Drop the RK_FUNC_GPIO for WAKE and CLKREQ as these seignal are
> ment for was introduced to allow PCI Express devices to enter
> even deeper power savings states (“L1.1” and “L1.2”) while still
> appearing to legacy software to be in the “L1” state
> ---
> .../boot/dts/rockchip/rk3588-rock-5b.dts | 46 +++++++++++++------
> 1 file changed, 33 insertions(+), 13 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
> index 966bbc582d89..a1e83546f1be 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
> @@ -318,7 +318,7 @@ map2 {
>
> &pcie2x1l0 {
> pinctrl-names = "default";
> - pinctrl-0 = <&pcie2_0_rst>;
> + pinctrl-0 = <&pcie30x1_pins>;
> reset-gpios = <&gpio4 RK_PA5 GPIO_ACTIVE_HIGH>;
> vpcie3v3-supply = <&vcc3v3_pcie2x1l0>;
> status = "okay";
> @@ -326,7 +326,7 @@ &pcie2x1l0 {
>
> &pcie2x1l2 {
> pinctrl-names = "default";
> - pinctrl-0 = <&pcie2_2_rst>;
> + pinctrl-0 = <&pcie20x12_pins>;
> reset-gpios = <&gpio3 RK_PB0 GPIO_ACTIVE_HIGH>;
> vpcie3v3-supply = <&vcc3v3_pcie2x1l2>;
> status = "okay";
> @@ -338,7 +338,7 @@ &pcie30phy {
>
> &pcie3x4 {
> pinctrl-names = "default";
> - pinctrl-0 = <&pcie3_rst>;
> + pinctrl-0 = <&pcie30x4_pins>;
> reset-gpios = <&gpio4 RK_PB6 GPIO_ACTIVE_HIGH>;
> vpcie3v3-supply = <&vcc3v3_pcie30>;
> status = "okay";
> @@ -363,28 +363,48 @@ hp_detect: hp-detect {
> };
> };
>
> - pcie2 {
> - pcie2_0_rst: pcie2-0-rst {
> - rockchip,pins = <4 RK_PA5 RK_FUNC_GPIO &pcfg_pull_none>;
> + pcie20x1 {
> + pcie20x12_pins: pcie20x12-pins {
> + rockchip,pins =
> + /* PCIE20_1_2_CLKREQn_M1_L */
> + <3 RK_PC7 4 &pcfg_pull_up>,
> + /* PCIE_PERST_L */
> + <3 RK_PB0 RK_FUNC_GPIO &pcfg_pull_up>,
> + /* PCIE20_1_2_WAKEn_M1_L */
> + <3 RK_PD0 4 &pcfg_pull_up>;
Some unanswered questions from v4:
How come you use internal pull-up/down on these pins?
And why do they differ for each pcie node in this series?
Regards,
Jonas
> };
> + };
>
> + pcie30x1 {
> pcie2_0_vcc3v3_en: pcie2-0-vcc-en {
> rockchip,pins = <1 RK_PD2 RK_FUNC_GPIO &pcfg_pull_none>;
> };
>
> - pcie2_2_rst: pcie2-2-rst {
> - rockchip,pins = <3 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;
> + pcie30x1_pins: pcie30x1-pins {
> + rockchip,pins =
> + /* PCIE30x1_0_CLKREQn_M1_L */
> + <4 RK_PA3 4 &pcfg_pull_down>,
> + /* PCIE30x1_0_PERSTn_M1_L */
> + <4 RK_PA5 RK_FUNC_GPIO &pcfg_pull_down>,
> + /* PCIE30x1_0_WAKEn_M1_L */
> + <4 RK_PA4 4 &pcfg_pull_down>;
> };
> };
>
> - pcie3 {
> - pcie3_rst: pcie3-rst {
> - rockchip,pins = <4 RK_PB6 RK_FUNC_GPIO &pcfg_pull_none>;
> - };
> -
> + pcie30x4 {
> pcie3_vcc3v3_en: pcie3-vcc3v3-en {
> rockchip,pins = <1 RK_PA4 RK_FUNC_GPIO &pcfg_pull_none>;
> };
> +
> + pcie30x4_pins: pcie30x4-pins {
> + rockchip,pins =
> + /* PCIE30X4_CLKREQn_M1_L */
> + <4 RK_PB4 4 &pcfg_pull_up>,
> + /* PCIE30X4_PERSTn_M1_L */
> + <4 RK_PB6 RK_FUNC_GPIO &pcfg_pull_down>,
> + /* PCIE30X4_WAKEn_M1_L */
> + <4 RK_PB5 4 &pcfg_pull_down>;
> + };
> };
>
> usb {
>
> base-commit: dc1c8034e31b14a2e5e212104ec508aec44ce1b9
