diff mbox series

[v3,3/8] clk: imx: pll14xx: Use FIELD_GET/FIELD_PREP

Message ID 20220304125256.2125023-4-s.hauer@pengutronix.de (mailing list archive)
State Awaiting Upstream, archived
Headers show
Series clk: i.MX: PLL14xx: Support dynamic rates | expand

Commit Message

Sascha Hauer March 4, 2022, 12:52 p.m. UTC 
Linux has these marvelous FIELD_GET/FIELD_PREP macros for easy access
to bitfields in registers. Use them and remove the now unused *_SHIFT
defines.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
---

Notes:
    Changes since v1:
    - Explicitly include linux/bitfield.h for FIELD_PREP/FIELD_GET

 drivers/clk/imx/clk-pll14xx.c | 40 +++++++++++++++++------------------
 1 file changed, 19 insertions(+), 21 deletions(-)
diff mbox series

Patch

diff --git a/drivers/clk/imx/clk-pll14xx.c b/drivers/clk/imx/clk-pll14xx.c
index b295d8a049009..fabb380b87305 100644
--- a/drivers/clk/imx/clk-pll14xx.c
+++ b/drivers/clk/imx/clk-pll14xx.c
@@ -3,6 +3,7 @@ 
  * Copyright 2017-2018 NXP.
  */
 
+#include <linux/bitfield.h>
 #include <linux/bits.h>
 #include <linux/clk-provider.h>
 #include <linux/err.h>
@@ -22,13 +23,9 @@ 
 #define CLKE_MASK	BIT(11)
 #define RST_MASK	BIT(9)
 #define BYPASS_MASK	BIT(4)
-#define MDIV_SHIFT	12
 #define MDIV_MASK	GENMASK(21, 12)
-#define PDIV_SHIFT	4
 #define PDIV_MASK	GENMASK(9, 4)
-#define SDIV_SHIFT	0
 #define SDIV_MASK	GENMASK(2, 0)
-#define KDIV_SHIFT	0
 #define KDIV_MASK	GENMASK(15, 0)
 
 #define LOCK_TIMEOUT_US		10000
@@ -124,9 +121,9 @@  static unsigned long clk_pll1416x_recalc_rate(struct clk_hw *hw,
 	u64 fvco = parent_rate;
 
 	pll_div = readl_relaxed(pll->base + DIV_CTL0);
-	mdiv = (pll_div & MDIV_MASK) >> MDIV_SHIFT;
-	pdiv = (pll_div & PDIV_MASK) >> PDIV_SHIFT;
-	sdiv = (pll_div & SDIV_MASK) >> SDIV_SHIFT;
+	mdiv = FIELD_GET(MDIV_MASK, pll_div);
+	pdiv = FIELD_GET(PDIV_MASK, pll_div);
+	sdiv = FIELD_GET(SDIV_MASK, pll_div);
 
 	fvco *= mdiv;
 	do_div(fvco, pdiv << sdiv);
@@ -144,10 +141,10 @@  static unsigned long clk_pll1443x_recalc_rate(struct clk_hw *hw,
 
 	pll_div_ctl0 = readl_relaxed(pll->base + DIV_CTL0);
 	pll_div_ctl1 = readl_relaxed(pll->base + DIV_CTL1);
-	mdiv = (pll_div_ctl0 & MDIV_MASK) >> MDIV_SHIFT;
-	pdiv = (pll_div_ctl0 & PDIV_MASK) >> PDIV_SHIFT;
-	sdiv = (pll_div_ctl0 & SDIV_MASK) >> SDIV_SHIFT;
-	kdiv = pll_div_ctl1 & KDIV_MASK;
+	mdiv = FIELD_GET(MDIV_MASK, pll_div_ctl0);
+	pdiv = FIELD_GET(PDIV_MASK, pll_div_ctl0);
+	sdiv = FIELD_GET(SDIV_MASK, pll_div_ctl0);
+	kdiv = FIELD_GET(KDIV_MASK, pll_div_ctl1);
 
 	/* fvco = (m * 65536 + k) * Fin / (p * 65536) */
 	fvco *= (mdiv * 65536 + kdiv);
@@ -163,8 +160,8 @@  static inline bool clk_pll14xx_mp_change(const struct imx_pll14xx_rate_table *ra
 {
 	u32 old_mdiv, old_pdiv;
 
-	old_mdiv = (pll_div & MDIV_MASK) >> MDIV_SHIFT;
-	old_pdiv = (pll_div & PDIV_MASK) >> PDIV_SHIFT;
+	old_mdiv = FIELD_GET(MDIV_MASK, pll_div);
+	old_pdiv = FIELD_GET(PDIV_MASK, pll_div);
 
 	return rate->mdiv != old_mdiv || rate->pdiv != old_pdiv;
 }
@@ -196,7 +193,7 @@  static int clk_pll1416x_set_rate(struct clk_hw *hw, unsigned long drate,
 
 	if (!clk_pll14xx_mp_change(rate, tmp)) {
 		tmp &= ~SDIV_MASK;
-		tmp |= rate->sdiv << SDIV_SHIFT;
+		tmp |= FIELD_PREP(SDIV_MASK, rate->sdiv);
 		writel_relaxed(tmp, pll->base + DIV_CTL0);
 
 		return 0;
@@ -215,8 +212,8 @@  static int clk_pll1416x_set_rate(struct clk_hw *hw, unsigned long drate,
 	tmp |= BYPASS_MASK;
 	writel(tmp, pll->base + GNRL_CTL);
 
-	div_val = (rate->mdiv << MDIV_SHIFT) | (rate->pdiv << PDIV_SHIFT) |
-		(rate->sdiv << SDIV_SHIFT);
+	div_val = FIELD_PREP(MDIV_MASK, rate->mdiv) | FIELD_PREP(PDIV_MASK, rate->pdiv) |
+		FIELD_PREP(SDIV_MASK, rate->sdiv);
 	writel_relaxed(div_val, pll->base + DIV_CTL0);
 
 	/*
@@ -262,10 +259,10 @@  static int clk_pll1443x_set_rate(struct clk_hw *hw, unsigned long drate,
 
 	if (!clk_pll14xx_mp_change(rate, tmp)) {
 		tmp &= ~SDIV_MASK;
-		tmp |= rate->sdiv << SDIV_SHIFT;
+		tmp |= FIELD_PREP(SDIV_MASK, rate->sdiv);
 		writel_relaxed(tmp, pll->base + DIV_CTL0);
 
-		tmp = rate->kdiv << KDIV_SHIFT;
+		tmp = FIELD_PREP(KDIV_MASK, rate->kdiv);
 		writel_relaxed(tmp, pll->base + DIV_CTL1);
 
 		return 0;
@@ -280,10 +277,11 @@  static int clk_pll1443x_set_rate(struct clk_hw *hw, unsigned long drate,
 	tmp |= BYPASS_MASK;
 	writel_relaxed(tmp, pll->base + GNRL_CTL);
 
-	div_val = (rate->mdiv << MDIV_SHIFT) | (rate->pdiv << PDIV_SHIFT) |
-		(rate->sdiv << SDIV_SHIFT);
+	div_val = FIELD_PREP(MDIV_MASK, rate->mdiv) |
+		  FIELD_PREP(PDIV_MASK, rate->pdiv) |
+		  FIELD_PREP(SDIV_MASK, rate->sdiv);
 	writel_relaxed(div_val, pll->base + DIV_CTL0);
-	writel_relaxed(rate->kdiv << KDIV_SHIFT, pll->base + DIV_CTL1);
+	writel_relaxed(FIELD_PREP(KDIV_MASK, rate->kdiv), pll->base + DIV_CTL1);
 
 	/*
 	 * According to SPEC, t3 - t2 need to be greater than