linux-kernel - [PATCH v4 04/18] clk: qcom: clk-hfpll: use poll

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Date:   Mon, 21 Mar 2022 15:48:11 +0100
From:   Ansuel Smith <ansuelsmth@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Ansuel Smith <ansuelsmth@...il.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org
Subject: [PATCH v4 04/18] clk: qcom: clk-hfpll: use poll_timeout macro

Use regmap_read_poll_timeout macro instead of do-while structure.

Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
---
 drivers/clk/qcom/clk-hfpll.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/qcom/clk-hfpll.c b/drivers/clk/qcom/clk-hfpll.c
index e847d586a73a..a4e347eb4d4d 100644
--- a/drivers/clk/qcom/clk-hfpll.c
+++ b/drivers/clk/qcom/clk-hfpll.c
@@ -12,6 +12,8 @@
 #include "clk-regmap.h"
 #include "clk-hfpll.h"
 
+#define HFPLL_BUSY_WAIT_TIMEOUT	100
+
 #define PLL_OUTCTRL	BIT(0)
 #define PLL_BYPASSNL	BIT(1)
 #define PLL_RESET_N	BIT(2)
@@ -72,13 +74,12 @@ static void __clk_hfpll_enable(struct clk_hw *hw)
 	regmap_update_bits(regmap, hd->mode_reg, PLL_RESET_N, PLL_RESET_N);
 
 	/* Wait for PLL to lock. */
-	if (hd->status_reg) {
-		do {
-			regmap_read(regmap, hd->status_reg, &val);
-		} while (!(val & BIT(hd->lock_bit)));
-	} else {
+	if (hd->status_reg)
+		regmap_read_poll_timeout(regmap, hd->status_reg, val,
+					 !(val & BIT(hd->lock_bit)), USEC_PER_MSEC * 2,
+					 HFPLL_BUSY_WAIT_TIMEOUT * USEC_PER_MSEC);
+	else
 		udelay(60);
-	}
 
 	/* Enable PLL output. */
 	regmap_update_bits(regmap, hd->mode_reg, PLL_OUTCTRL, PLL_OUTCTRL);
-- 
2.34.1