rockchip: clk: rk3368: add support for GMAC (SLCK_MAC) clock

[people/ms/u-boot.git] / drivers / clk / rockchip / clk_rk3368.c

diff --git a/drivers/clk/rockchip/clk_rk3368.c b/drivers/clk/rockchip/clk_rk3368.c
index 1bed4e20bf0e09b070e2aa4926fc89573dadc617..2b6c8dabf8f280006c755fcb01dc9883039944b8 100644 (file)
--- a/drivers/clk/rockchip/clk_rk3368.c
+++ b/drivers/clk/rockchip/clk_rk3368.c
@@ -338,6 +338,19 @@ static ulong rk3368_ddr_set_clk(struct rk3368_cru *cru, ulong set_rate)
 }
 #endif
 
+#if CONFIG_IS_ENABLED(GMAC_ROCKCHIP)
+static ulong rk3368_gmac_set_clk(struct rk3368_cru *cru,
+                                ulong clk_id, ulong set_rate)
+{
+       /*
+        * This models the 'assigned-clock-parents = <&ext_gmac>' from
+        * the DTS and switches to the 'ext_gmac' clock parent.
+        */
+       rk_setreg(&cru->clksel_con[43], GMAC_MUX_SEL_EXTCLK);
+       return set_rate;
+}
+#endif
+
 static ulong rk3368_clk_set_rate(struct clk *clk, ulong rate)
 {
        struct rk3368_clk_priv *priv = dev_get_priv(clk->dev);
@@ -356,10 +369,12 @@ static ulong rk3368_clk_set_rate(struct clk *clk, ulong rate)
                ret = rk3368_mmc_set_clk(clk, rate);
                break;
 #endif
+#if CONFIG_IS_ENABLED(GMAC_ROCKCHIP)
        case SCLK_MAC:
-               /* nothing to do, as this is an external clock */
-               ret = rate;
+               /* select the external clock */
+               ret = rk3368_gmac_set_clk(priv->cru, clk->id, rate);
                break;
+#endif
        default:
                return -ENOENT;
        }