[U-Boot] [PATCH] am33xx: Add a function to query MPU voltage in uV

[Lokesh Vutla]

On Wednesday 11 October 2017 10:12 PM, Felix Brack wrote:
> For the DM TPS65910 driver I'm working on, querying the MPU voltage
> should return a value in uV. This value can then be used by the
> regulator's standard function set_value to set the MPU voltage.
> 
> Signed-off-by: Felix Brack <fb at ltec.ch>

Reviewed-by: Lokesh Vutla <lokeshvutla at ti.com>

Thanks and regards,
Lokesh


> ---
> 
>  arch/arm/include/asm/arch-am33xx/sys_proto.h |  1 +
>  arch/arm/mach-omap2/am33xx/sys_info.c        | 16 ++++++++++++++++
>  2 files changed, 17 insertions(+)
> 
> diff --git a/arch/arm/include/asm/arch-am33xx/sys_proto.h b/arch/arm/include/asm/arch-am33xx/sys_proto.h
> index 4e78aaf..57fbfa4 100644
> --- a/arch/arm/include/asm/arch-am33xx/sys_proto.h
> +++ b/arch/arm/include/asm/arch-am33xx/sys_proto.h
> @@ -40,6 +40,7 @@ void enable_norboot_pin_mux(void);
>  #endif
>  void am33xx_spl_board_init(void);
>  int am335x_get_efuse_mpu_max_freq(struct ctrl_dev *cdev);
> +int am335x_get_mpu_vdd(int sil_rev, int frequency);
>  int am335x_get_tps65910_mpu_vdd(int sil_rev, int frequency);
>  #endif
>  
> diff --git a/arch/arm/mach-omap2/am33xx/sys_info.c b/arch/arm/mach-omap2/am33xx/sys_info.c
> index ea434aa..0181a8c 100644
> --- a/arch/arm/mach-omap2/am33xx/sys_info.c
> +++ b/arch/arm/mach-omap2/am33xx/sys_info.c
> @@ -175,6 +175,22 @@ int am335x_get_efuse_mpu_max_freq(struct ctrl_dev *cdev)
>  	return MPUPLL_M_720;
>  }
>  
> +int am335x_get_mpu_vdd(int sil_rev, int frequency)
> +{
> +	int sel_mask = am335x_get_tps65910_mpu_vdd(sil_rev, frequency);
> +
> +	switch (sel_mask) {
> +	case TPS65910_OP_REG_SEL_1_3_2_5:
> +		return 1325000;
> +	case TPS65910_OP_REG_SEL_1_2_0:
> +		return 1200000;
> +	case TPS65910_OP_REG_SEL_1_1_0:
> +		return 1100000;
> +	default:
> +		return 1262500;
> +	}
> +}
> +
>  int am335x_get_tps65910_mpu_vdd(int sil_rev, int frequency)
>  {
>  	/* For PG2.0 and later, we have one set of values. */
>