Hi,
On 9/14/22 10:42, Tony Lindgren wrote:
> There are 8 general purpose timers on am65 that can be used for things
> like PWM using pwm-omap-dmtimer driver. There are also additional four
> timers in the MCU domain that do not have interrupts routable for Linux.
>
> We configure the timers with the 25 MHz input clock by default as the
> 32.768 kHz clock may not be wired on the device. We leave the MCU domain
> timers clock mux unconfigured, and mark the MCU domain timers reserved.
> The MCU domain timers are likely reserved by the software for the ESM
> module.
>
> Compared to am65, the timers on am62 do not have a dedicated IO mux for
> the timers. On am62, the timers have different interrupts, clocks and
> power domains compared to am65, and the MCU timers are at a different
> IO address.
>
> Cc: Keerthy <j-keerthy@xxxxxx>
> Cc: Nishanth Menon <nm@xxxxxx>
> Cc: Vignesh Raghavendra <vigneshr@xxxxxx>
> Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
> ---
> arch/arm64/boot/dts/ti/k3-am62-main.dtsi | 97 ++++++++++++++++++++++++
> arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi | 45 +++++++++++
> 2 files changed, 142 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
> --- a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
> @@ -186,6 +186,103 @@ main_pmx0: pinctrl@f4000 {
> pinctrl-single,function-mask = <0xffffffff>;
> };
>
> + main_timer0: timer@2400000 {
> + compatible = "ti,am654-timer";
> + reg = <0x00 0x2400000 0x00 0x400>;
> + interrupts = <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&k3_clks 36 2>;
> + clock-names = "fck";
> + assigned-clocks = <&k3_clks 36 2>;
> + assigned-clock-parents = <&k3_clks 36 3>;
> + power-domains = <&k3_pds 36 TI_SCI_PD_EXCLUSIVE>;
> + ti,timer-pwm;
> + };
> +
> + main_timer1: timer@2410000 {
> + compatible = "ti,am654-timer";
> + reg = <0x00 0x2410000 0x00 0x400>;
> + interrupts = <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&k3_clks 37 2>;
> + clock-names = "fck";
> + assigned-clocks = <&k3_clks 37 2>;
> + assigned-clock-parents = <&k3_clks 37 3>;
> + power-domains = <&k3_pds 37 TI_SCI_PD_EXCLUSIVE>;
> + ti,timer-pwm;
> + };
> +
> + main_timer2: timer@2420000 {
> + compatible = "ti,am654-timer";
> + reg = <0x00 0x2420000 0x00 0x400>;
> + interrupts = <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&k3_clks 38 2>;
> + clock-names = "fck";
> + assigned-clocks = <&k3_clks 38 2>;
> + assigned-clock-parents = <&k3_clks 38 3>;
> + power-domains = <&k3_pds 38 TI_SCI_PD_EXCLUSIVE>;
> + ti,timer-pwm;
> + };
> +
> + main_timer3: timer@2430000 {
> + compatible = "ti,am654-timer";
> + reg = <0x00 0x2430000 0x00 0x400>;
> + interrupts = <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&k3_clks 39 2>;
> + clock-names = "fck";
> + assigned-clocks = <&k3_clks 39 2>;
> + assigned-clock-parents = <&k3_clks 39 3>;
> + power-domains = <&k3_pds 39 TI_SCI_PD_EXCLUSIVE>;
> + ti,timer-pwm;
> + };
> +
> + main_timer4: timer@2440000 {
> + compatible = "ti,am654-timer";
> + reg = <0x00 0x2440000 0x00 0x400>;
> + interrupts = <GIC_SPI 124 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&k3_clks 40 2>;
> + clock-names = "fck";
> + assigned-clocks = <&k3_clks 40 2>;
> + assigned-clock-parents = <&k3_clks 40 3>;
> + power-domains = <&k3_pds 40 TI_SCI_PD_EXCLUSIVE>;
> + ti,timer-pwm;
> + };
> +
> + main_timer5: timer@2450000 {
> + compatible = "ti,am654-timer";
> + reg = <0x00 0x2450000 0x00 0x400>;
> + interrupts = <GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&k3_clks 41 2>;
> + clock-names = "fck";
> + assigned-clocks = <&k3_clks 41 2>;
> + assigned-clock-parents = <&k3_clks 41 3>;
> + power-domains = <&k3_pds 41 TI_SCI_PD_EXCLUSIVE>;
> + ti,timer-pwm;
> + };
> +
> + main_timer6: timer@2460000 {
> + compatible = "ti,am654-timer";
> + reg = <0x00 0x2460000 0x00 0x400>;
> + interrupts = <GIC_SPI 126 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&k3_clks 42 2>;
> + clock-names = "fck";
> + assigned-clocks = <&k3_clks 42 2>;
> + assigned-clock-parents = <&k3_clks 42 3>;
> + power-domains = <&k3_pds 42 TI_SCI_PD_EXCLUSIVE>;
> + ti,timer-pwm;
> + };
> +
> + main_timer7: timer@2470000 {
> + compatible = "ti,am654-timer";
> + reg = <0x00 0x2470000 0x00 0x400>;
> + interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&k3_clks 43 2>;
> + clock-names = "fck";
> + assigned-clocks = <&k3_clks 43 2>;
> + assigned-clock-parents = <&k3_clks 43 3>;
> + power-domains = <&k3_pds 43 TI_SCI_PD_EXCLUSIVE>;
> + ti,timer-pwm;
> + };
> +
> +
> main_uart0: serial@2800000 {
> compatible = "ti,am64-uart", "ti,am654-uart";
> reg = <0x00 0x02800000 0x00 0x100>;
> diff --git a/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi
> --- a/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi
> @@ -14,6 +14,51 @@ mcu_pmx0: pinctrl@4084000 {
> pinctrl-single,function-mask = <0xffffffff>;
> };
>
> + /*
> + * The MCU domain timer interrupts are routed only to the ESM module,
> + * and not currently available for Linux. The MCU domain timers are
> + * of limited use without interrupts, and likely reserved by the ESM.
> + */
> + mcu_timer0: timer@4800000 {
> + compatible = "ti,am654-timer";
> + reg = <0x00 0x4800000 0x00 0x400>;
> + clocks = <&k3_clks 35 2>;
> + clock-names = "fck";
> + power-domains = <&k3_pds 35 TI_SCI_PD_EXCLUSIVE>;
> + ti,timer-pwm;
> + status = "reserved";
> + };
> +
> + mcu_timer1: timer@4810000 {
> + compatible = "ti,am654-timer";
> + reg = <0x00 0x4810000 0x00 0x400>;
> + clocks = <&k3_clks 48 2>;
> + clock-names = "fck";
> + power-domains = <&k3_pds 48 TI_SCI_PD_EXCLUSIVE>;
> + ti,timer-pwm;
> + status = "reserved";
> + };
> +
> + mcu_timer2: timer@4820000 {
> + compatible = "ti,am654-timer";
> + reg = <0x00 0x4820000 0x00 0x400>;
> + clocks = <&k3_clks 49 2>;
> + clock-names = "fck";
> + power-domains = <&k3_pds 49 TI_SCI_PD_EXCLUSIVE>;
> + ti,timer-pwm;
> + status = "reserved";
> + };
> +
> + mcu_timer3: timer@4830000 {
> + compatible = "ti,am654-timer";
> + reg = <0x00 0x4830000 0x00 0x400>;
> + clocks = <&k3_clks 50 2>;
> + clock-names = "fck";
> + power-domains = <&k3_pds 50 TI_SCI_PD_EXCLUSIVE>;
> + ti,timer-pwm;
> + status = "reserved";
> + };
> +
> mcu_uart0: serial@4a00000 {
> compatible = "ti,am64-uart", "ti,am654-uart";
> reg = <0x00 0x04a00000 0x00 0x100>;
The "power-domains" property fix for the binding was merged recently.
Reviewed-by: Georgi Vlaev <g-vlaev@xxxxxx>
--
Regards,
Georgi
