iot_dk: Add support of 136 MHz clock

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

diff --git a/board/synopsys/iot_devkit/iot_devkit.c b/board/synopsys/iot_devkit/iot_devkit.c
index fb39e6d50c4d0c3fde25a4e320e769c07e141e17..04e003c31f93583ec8ef1793319ca66ff8e61b34 100644 (file)
--- a/board/synopsys/iot_devkit/iot_devkit.c
+++ b/board/synopsys/iot_devkit/iot_devkit.c
@@ -68,6 +68,14 @@ static int set_cpu_freq(unsigned int clk)
                writel((readl(PLLCON) & PLL_MASK_2) | 0x200191, PLLCON);
                break;
 
+       case 136:
+               writel(readl(PLLCON) & PLL_MASK_0, PLLCON);
+               /* pll_off=1, M=17, N=1, OD=1, PLL_OUT_CLK=136M */
+               writel((readl(PLLCON) & PLL_MASK_1) | 0x100111, PLLCON);
+               /* pll_off=0, M=17, N=1, OD=1, PLL_OUT_CLK=136M */
+               writel((readl(PLLCON) & PLL_MASK_2) | 0x100111, PLLCON);
+               break;
+
        case 144:
                writel(readl(PLLCON) & PLL_MASK_0, PLLCON);
                /* pll_off=1, M=18, N=1, OD=1, PLL_OUT_CLK=144M */