[PATCH v1] [ZynqMP] Writing correct value to ANALOG_BUS.

[Michal Simek]

On 6/8/21 12:37 PM, Adrian Fiergolski wrote:
> The default register configuration after powerup for PSSYSMON_ANALOG_BUS
> register is incorrect. Hence, fix this in SPL by writing correct fixed
> value. It follows UG1085 chapter 'PS SYSMON Analog_Bus' and reflects commit
> sw_apps:zynq ("056ca65d44549ce27f716d423e8dfdefeee7440c")
> in Xilinx:embeddedsw[1].
> 
> [1] https://github.com/Xilinx/embeddedsw
> 
> Signed-off-by: Adrian Fiergolski <adrian.fiergolski at fastree3d.com>
> 
> ---
> Changes in v1:
>  - fix patch log
>  - based on v2021.07-rc4 branch
>  
>  arch/arm/mach-zynqmp/include/mach/hardware.h |  5 +++++
>  board/xilinx/zynqmp/zynqmp.c                 | 11 +++++++++++
>  2 files changed, 16 insertions(+)
> 
> diff --git a/arch/arm/mach-zynqmp/include/mach/hardware.h b/arch/arm/mach-zynqmp/include/mach/hardware.h
> index a0acfa2ff1..4774ed4089 100644
> --- a/arch/arm/mach-zynqmp/include/mach/hardware.h
> +++ b/arch/arm/mach-zynqmp/include/mach/hardware.h
> @@ -15,6 +15,11 @@
>  #define ZYNQMP_CRL_APB_BOOT_PIN_CTRL_OUT_EN_SHIFT	0
>  #define ZYNQMP_CRL_APB_BOOT_PIN_CTRL_OUT_VAL_SHIFT	8
>  
> +#define ZYNQMP_AMS_PS_SYSMON_BASEADDR      0XFFA50800
> +#define ZYNQMP_AMS_PS_SYSMON_ANALOG_BUS ((ZYNQMP_AMS_PS_SYSMON_BASEADDR) \
> +							    + 0x00000114)
> +#define ZYNQMP_PS_SYSMON_ANALOG_BUS_VAL 0x00003210
> +
>  #define PS_MODE0	BIT(0)
>  #define PS_MODE1	BIT(1)
>  #define PS_MODE2	BIT(2)
> 
> diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c
> index d05f0b2e12..ee4d0c85e6 100644
> --- a/board/xilinx/zynqmp/zynqmp.c
> +++ b/board/xilinx/zynqmp/zynqmp.c
> @@ -287,6 +287,17 @@ int board_early_init_f(void)
>  	if (ret)
>  		return ret;
>  
> +	/*
> +	 * PS_SYSMON_ANALOG_BUS register determines mapping between SysMon
> +	 * supply sense channel to SysMon supply registers inside the IP.
> +	 * This register must be programmed to complete SysMon IP
> +	 * configuration. The default register configuration after
> +	 * power-up is incorrect. Hence, fix this by writing the
> +	 * correct value - 0x3210.
> +	 */
> +	writel(ZYNQMP_PS_SYSMON_ANALOG_BUS_VAL,
> +	       ZYNQMP_AMS_PS_SYSMON_ANALOG_BUS);
> +
>  	/* Delay is required for clocks to be propagated */
>  	udelay(1000000);
>  #endif
> 

I have added arm64: zynqmp: to subject and applied.

Thanks,
Michal