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>
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 @@
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;