[PATCH v6 12/27] clk: mediatek: pll: Add PLL stabilization delay definition

[Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com>]

Several functions uses a hardcoded value (20), to represent the
needed delay to stabilize a PLL.
Add a common define for this value.

Reviewed-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com>
---
 drivers/clk/mediatek/clk-pll.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/mediatek/clk-pll.c b/drivers/clk/mediatek/clk-pll.c
index 2aaf2871ecf6..9a197a657dce 100644
--- a/drivers/clk/mediatek/clk-pll.c
+++ b/drivers/clk/mediatek/clk-pll.c
@@ -31,6 +31,8 @@
 /* default 7 bits integer, can be overridden with pcwibits. */
 #define INTEGER_BITS		7
 
+#define PLL_STABILIZATION_DELAY	20 /* in us */
+
 int mtk_pll_is_prepared(struct clk_hw *hw)
 {
 	struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
@@ -131,7 +133,7 @@ static void mtk_pll_set_rate_regs(struct mtk_clk_pll *pll, u32 pcw,
 	/* restore tuner_en */
 	__mtk_pll_tuner_enable(pll);
 
-	udelay(20);
+	udelay(PLL_STABILIZATION_DELAY);
 }
 
 /*
@@ -264,7 +266,7 @@ int mtk_pll_prepare(struct clk_hw *hw)
 
 	__mtk_pll_tuner_enable(pll);
 
-	udelay(20);
+	udelay(PLL_STABILIZATION_DELAY);
 
 	if (pll->data->flags & HAVE_RST_BAR) {
 		r = readl(pll->rst_bar_addr);
@@ -306,7 +308,7 @@ static int mtk_pll_prepare_fenc_setclr(struct clk_hw *hw)
 	writel(BIT(pll->data->pll_en_bit), pll->en_set_addr);
 
 	/* Wait 20us after enable for the PLL to stabilize */
-	udelay(20);
+	udelay(PLL_STABILIZATION_DELAY);
 
 	return 0;
 }

-- 
2.55.0