On 09:43-20230503, Udit Kumar wrote:
> There are timer IO pads in the MCU domain, and in the MAIN domain. These
> pads can be muxed for the related timers.
>
> There are timer IO control registers for input and output. The registers
> for CTRLMMR_TIMER*_CTRL and CTRLMMR_MCU_TIMER*_CTRL are used to control
> the input. The registers for CTCTRLMMR_TIMERIO*_CTRL and
> CTRLMMR_MCU_TIMERIO*_CTRL the output.
>
> The multiplexing is documented in TRM "5.1.2.3.1.4 Timer IO Muxing Control
> Registers" and "5.1.3.3.1.5 Timer IO Muxing Control Registers", and the
> CASCADE_EN bit is documented in TRM "12.6.3.1 Timers Overview".
>
> For chaining timers, the timer IO control registers also have a CASCADE_EN
> input bit in the CTRLMMR_TIMER*_CTRL in the registers. The CASCADE_EN bit
> muxes the previous timer output, or possibly and external TIMER_IO pad
> source, to the input clock of the selected timer instance for odd numered
> timers. For the even numbered timers, the CASCADE_EN bit does not do
> anything. The timer cascade input routing options are shown in TRM
> "Figure 12-3224. Timers Overview". For handling beyond multiplexing, the
> driver support for timer cascading should be likely be handled via the
> clock framework.
>
> Cc: Nishanth Menon <n...@ti.com>
> Cc: Vignesh Raghavendra <vigne...@ti.com>
> Cc: Tony Lindgren <t...@atomide.com>
> Signed-off-by: Udit Kumar <u-kum...@ti.com>
> ---
> arch/arm/dts/k3-j7200-main.dtsi | 18 ++++++++++++++++++
> arch/arm/dts/k3-j7200-mcu-wakeup.dtsi | 18 ++++++++++++++++++
> 2 files changed, 36 insertions(+)
>
> diff --git a/arch/arm/dts/k3-j7200-main.dtsi b/arch/arm/dts/k3-j7200-main.dtsi
> index 54795db9c3..fb9e4842c1 100644
> --- a/arch/arm/dts/k3-j7200-main.dtsi
> +++ b/arch/arm/dts/k3-j7200-main.dtsi
> @@ -304,6 +304,24 @@
> };
> };
>
> + /* TIMERIO pad input CTRLMMR_TIMER*_CTRL registers */
> + main_timerio_input: pinctrl@104200 {
> + compatible = "pinctrl-single";
> + reg = <0x0 0x104200 0x0 0x50>;
> + #pinctrl-cells = <1>;
> + pinctrl-single,register-width = <32>;
> + pinctrl-single,function-mask = <0x000001ff>;
> + };
> +
> + /* TIMERIO pad output CTCTRLMMR_TIMERIO*_CTRL registers */
> + main_timerio_output: pinctrl@104280 {
> + compatible = "pinctrl-single";
> + reg = <0x0 0x104280 0x0 0x20>;
> + #pinctrl-cells = <1>;
> + pinctrl-single,register-width = <32>;
> + pinctrl-single,function-mask = <0x0000001f>;
> + };
> +
> main_pmx0: pinctrl@11c000 {
> compatible = "pinctrl-single";
> /* Proxy 0 addressing */
> diff --git a/arch/arm/dts/k3-j7200-mcu-wakeup.dtsi
> b/arch/arm/dts/k3-j7200-mcu-wakeup.dtsi
> index 02c2493064..7ed6c31c7c 100644
> --- a/arch/arm/dts/k3-j7200-mcu-wakeup.dtsi
> +++ b/arch/arm/dts/k3-j7200-mcu-wakeup.dtsi
> @@ -183,6 +183,24 @@
> reg = <0x00 0x43000014 0x00 0x4>;
> };
>
> + /* MCU_TIMERIO pad input CTRLMMR_MCU_TIMER*_CTRL registers */
> + mcu_timerio_input: pinctrl@40f04200 {
> + compatible = "pinctrl-single";
> + reg = <0x0 0x40f04200 0x0 0x28>;
> + #pinctrl-cells = <1>;
> + pinctrl-single,register-width = <32>;
> + pinctrl-single,function-mask = <0x0000000F>;
> + };
> +
> + /* MCU_TIMERIO pad output CTRLMMR_MCU_TIMERIO*_CTRL registers */
> + mcu_timerio_output: pinctrl@40f04280 {
> + compatible = "pinctrl-single";
> + reg = <0x0 0x40f04280 0x0 0x28>;
> + #pinctrl-cells = <1>;
> + pinctrl-single,register-width = <32>;
> + pinctrl-single,function-mask = <0x0000000F>;
> + };
> +
> wkup_pmx0: pinctrl@4301c000 {
> compatible = "pinctrl-single";
> /* Proxy 0 addressing */
> --
> 2.34.1
>
Needs to get to k.org master.
--
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5
849D 1736 249D
