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| author | maxims@google.com <maxims@google.com> | 2017-04-17 12:00:29 -0700 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2017-05-08 11:57:34 -0400 |
| commit | 4999bb06cc2f21d3a517a068b183fb11827f49a7 (patch) | |
| tree | c6b92d76a598d2efea41a928b4f2a617d3235b2c | |
| parent | 3ef7f12cdd1b042cf657a1ea734bb9d2a4adc0da (diff) | |
| download | u-boot-4999bb06cc2f21d3a517a068b183fb11827f49a7.zip u-boot-4999bb06cc2f21d3a517a068b183fb11827f49a7.tar.gz u-boot-4999bb06cc2f21d3a517a068b183fb11827f49a7.tar.bz2 | |
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 <maxims@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | arch/arm/include/asm/arch-aspeed/scu_ast2500.h | 3 | ||||
| -rw-r--r-- | drivers/clk/aspeed/clk_ast2500.c | 11 |
2 files changed, 13 insertions, 1 deletions
diff --git a/arch/arm/include/asm/arch-aspeed/scu_ast2500.h b/arch/arm/include/asm/arch-aspeed/scu_ast2500.h index 1cdd3b9..319d75e 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 5047312..9e4c66e 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; |