clk: stm32mp1: fix CK_MPU calculation

From: Lionel Debieve <lionel.debieve at st.com>

When the CK_MPU used PLL1_MPUDIV, the current rate is
wrong. The clock must use stm32mp1_mpu_div as a shift
value. Fix the check value used to enter PLL_MPUDIV.

Signed-off-by: Lionel Debieve <lionel.debieve at st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
---

 drivers/clk/clk_stm32mp1.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

On 4/24/20 3:47 PM, Patrick Delaunay wrote:
> From: Lionel Debieve <lionel.debieve at st.com>
>
> When the CK_MPU used PLL1_MPUDIV, the current rate is
> wrong. The clock must use stm32mp1_mpu_div as a shift
> value. Fix the check value used to enter PLL_MPUDIV.
>
> Signed-off-by: Lionel Debieve <lionel.debieve at st.com>
> Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
> ---
>
>  drivers/clk/clk_stm32mp1.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/clk/clk_stm32mp1.c b/drivers/clk/clk_stm32mp1.c
> index 50df8425bf..0d0ea43fd2 100644
> --- a/drivers/clk/clk_stm32mp1.c
> +++ b/drivers/clk/clk_stm32mp1.c
> @@ -954,10 +954,11 @@ static ulong stm32mp1_clk_get(struct stm32mp1_clk_priv *priv, int p)
>  		case RCC_MPCKSELR_PLL:
>  		case RCC_MPCKSELR_PLL_MPUDIV:
>  			clock = stm32mp1_read_pll_freq(priv, _PLL1, _DIV_P);
> -			if (p == RCC_MPCKSELR_PLL_MPUDIV) {
> +			if ((reg & RCC_SELR_SRC_MASK) ==
> +			    RCC_MPCKSELR_PLL_MPUDIV) {
>  				reg = readl(priv->base + RCC_MPCKDIVR);
> -				clock /= stm32mp1_mpu_div[reg &
> -							  RCC_MPUDIV_MASK];
> +				clock >>= stm32mp1_mpu_div[reg &
> +					RCC_MPUDIV_MASK];
>  			}
>  			break;
>  		}
>
> Reviewed-by: Patrice Chotard <patrice.chotard at st.com>
>
> Thanks
>
> Patrice
>

Hi,

> From: Patrick DELAUNAY <patrick.delaunay at st.com>
> Sent: vendredi 24 avril 2020 15:48
> To: u-boot at lists.denx.de
> Cc: Lionel DEBIEVE <lionel.debieve at st.com>; Patrick DELAUNAY
> <patrick.delaunay at st.com>; Lukasz Majewski <lukma at denx.de>; Patrice
> CHOTARD <patrice.chotard at st.com>; U-Boot STM32 <uboot-stm32 at st-md-
> mailman.stormreply.com>
> Subject: [PATCH] clk: stm32mp1: fix CK_MPU calculation
> Importance: High
> 
> From: Lionel Debieve <lionel.debieve at st.com>
> 
> When the CK_MPU used PLL1_MPUDIV, the current rate is wrong. The clock
> must use stm32mp1_mpu_div as a shift value. Fix the check value used to enter
> PLL_MPUDIV.
> 
> Signed-off-by: Lionel Debieve <lionel.debieve at st.com>
> Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
> ---
> 
>  drivers/clk/clk_stm32mp1.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 

Applied to u-boot-stm/master, thanks!

Regards

Patrick