[PATCH v3 25/32] clk: mediatek: add CLK_XTAL support for clock driver

[Weijie Gao]

This adds the CLK_XTAL macro/flag to allow modeling clocks which are
directly connected to the xtal clock.

Reviewed-by: Simon Glass <sjg at chromium.org>
Tested-by: Daniel Golle <daniel at makrotopia.org>
Signed-off-by: Weijie Gao <weijie.gao at mediatek.com>
---
v3 changes: none
v2 changes:
  Fix incorrect fallback in mtk_infrasys_get_factor_rate
  Fix commit description
---
 drivers/clk/mediatek/clk-mtk.c | 4 ++++
 drivers/clk/mediatek/clk-mtk.h | 3 ++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
index 207a4c6b11..4303300d3a 100644
--- a/drivers/clk/mediatek/clk-mtk.c
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -296,6 +296,7 @@ static ulong mtk_topckgen_get_factor_rate(struct clk *clk, u32 off)
 		rate = mtk_clk_find_parent_rate(clk, fdiv->parent, NULL);
 		break;
 
+	case CLK_PARENT_XTAL:
 	default:
 		rate = priv->tree->xtal_rate;
 	}
@@ -314,6 +315,9 @@ static ulong mtk_infrasys_get_factor_rate(struct clk *clk, u32 off)
 		rate = mtk_clk_find_parent_rate(clk, fdiv->parent,
 						priv->parent);
 		break;
+	case CLK_PARENT_XTAL:
+		rate = priv->tree->xtal_rate;
+		break;
 	default:
 		rate = mtk_clk_find_parent_rate(clk, fdiv->parent, NULL);
 	}
diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
index e7c61ae483..48ce16484e 100644
--- a/drivers/clk/mediatek/clk-mtk.h
+++ b/drivers/clk/mediatek/clk-mtk.h
@@ -29,7 +29,8 @@
 #define CLK_PARENT_APMIXED		BIT(4)
 #define CLK_PARENT_TOPCKGEN		BIT(5)
 #define CLK_PARENT_INFRASYS		BIT(6)
-#define CLK_PARENT_MASK			GENMASK(6, 4)
+#define CLK_PARENT_XTAL			BIT(7)
+#define CLK_PARENT_MASK			GENMASK(7, 4)
 
 #define ETHSYS_HIFSYS_RST_CTRL_OFS	0x34
 
-- 
2.17.1