From: maxims@google.com Date: Mon, 17 Apr 2017 19:00:29 +0000 (-0700) Subject: aspeed: Add P-Bus clock in ast2500 clock driver X-Git-Tag: v2017.07-rc1~409 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=4999bb06cc2f21d3a517a068b183fb11827f49a7;p=u-boot aspeed: Add P-Bus clock in ast2500 clock driver Add P-Bus Clock support to ast2500 clock driver. This is the clock used by I2C devices. Signed-off-by: Maxim Sloyko Reviewed-by: Simon Glass --- diff --git a/arch/arm/include/asm/arch-aspeed/scu_ast2500.h b/arch/arm/include/asm/arch-aspeed/scu_ast2500.h index 1cdd3b9198..319d75e05c 100644 --- a/arch/arm/include/asm/arch-aspeed/scu_ast2500.h +++ b/arch/arm/include/asm/arch-aspeed/scu_ast2500.h @@ -21,7 +21,8 @@ #define SCU_MPLL_NUM_MASK 0xff #define SCU_MPLL_POST_SHIFT 13 #define SCU_MPLL_POST_MASK 0x3f - +#define SCU_PCLK_DIV_SHIFT 23 +#define SCU_PCLK_DIV_MASK 7 #define SCU_HPLL_DENUM_SHIFT 0 #define SCU_HPLL_DENUM_MASK 0x1f #define SCU_HPLL_NUM_SHIFT 5 diff --git a/drivers/clk/aspeed/clk_ast2500.c b/drivers/clk/aspeed/clk_ast2500.c index 504731271c..9e4c66ea85 100644 --- a/drivers/clk/aspeed/clk_ast2500.c +++ b/drivers/clk/aspeed/clk_ast2500.c @@ -110,6 +110,17 @@ static ulong ast2500_clk_get_rate(struct clk *clk) rate = ast2500_get_mpll_rate(clkin, readl(&priv->scu->m_pll_param)); break; + case BCLK_PCLK: + { + ulong apb_div = 4 + 4 * ((readl(&priv->scu->clk_sel1) + >> SCU_PCLK_DIV_SHIFT) & + SCU_PCLK_DIV_MASK); + rate = ast2500_get_hpll_rate(clkin, + readl(&priv->scu-> + h_pll_param)); + rate = rate / apb_div; + } + break; case PCLK_UART1: rate = ast2500_get_uart_clk_rate(priv->scu, 1); break;