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Date: Mon, 22 Nov 2021 16:53:55 +0100
From: Geert Uytterhoeven <geert+renesas@...der.be>
To: Tony Lindgren <tony@...mide.com>,
Russell King <linux@...linux.org.uk>,
Rajendra Nayak <rnayak@...eaurora.org>,
Paul Walmsley <paul@...an.com>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Nicolas Ferre <nicolas.ferre@...rochip.com>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Ludovic Desroches <ludovic.desroches@...rochip.com>,
Tero Kristo <kristo@...nel.org>,
Jonathan Cameron <jic23@...nel.org>,
Lars-Peter Clausen <lars@...afoo.de>,
Lorenzo Bianconi <lorenzo.bianconi83@...il.com>,
Benoit Parrot <bparrot@...com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Adrian Hunter <adrian.hunter@...el.com>,
Andrew Jeffery <andrew@...id.au>,
Ulf Hansson <ulf.hansson@...aro.org>,
Joel Stanley <joel@....id.au>,
Ping-Ke Shih <pkshih@...ltek.com>,
Kalle Valo <kvalo@...eaurora.org>,
"David S . Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Linus Walleij <linus.walleij@...aro.org>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Magnus Damm <magnus.damm@...il.com>,
Eduardo Valentin <edubezval@...il.com>,
Keerthy <j-keerthy@...com>,
"Rafael J . Wysocki" <rafael@...nel.org>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Amit Kucheria <amitk@...nel.org>,
Zhang Rui <rui.zhang@...el.com>,
Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
linux-renesas-soc@...r.kernel.org, linux-iio@...r.kernel.org,
linux-media@...r.kernel.org, linux-mmc@...r.kernel.org,
linux-aspeed@...ts.ozlabs.org, openbmc@...ts.ozlabs.org,
linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
linux-gpio@...r.kernel.org, linux-pm@...r.kernel.org,
alsa-devel@...a-project.org,
Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH 02/17] clk: renesas: Use bitfield helpers
Use the FIELD_{GET,PREP}() and field_{get,prep}() helpers for const
respective non-const bitfields, instead of open-coding the same
operations.
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
drivers/clk/renesas/clk-div6.c | 6 +++---
drivers/clk/renesas/r8a779a0-cpg-mssr.c | 9 +++------
drivers/clk/renesas/rcar-gen3-cpg.c | 15 +++++----------
3 files changed, 11 insertions(+), 19 deletions(-)
diff --git a/drivers/clk/renesas/clk-div6.c b/drivers/clk/renesas/clk-div6.c
index 3abd6e5400aded6a..f7b827b5e9b2dd32 100644
--- a/drivers/clk/renesas/clk-div6.c
+++ b/drivers/clk/renesas/clk-div6.c
@@ -7,6 +7,7 @@
* Contact: Laurent Pinchart <laurent.pinchart@...asonboard.com>
*/
+#include <linux/bitfield.h>
#include <linux/clk-provider.h>
#include <linux/init.h>
#include <linux/io.h>
@@ -171,8 +172,7 @@ static u8 cpg_div6_clock_get_parent(struct clk_hw *hw)
if (clock->src_mask == 0)
return 0;
- hw_index = (readl(clock->reg) & clock->src_mask) >>
- __ffs(clock->src_mask);
+ hw_index = field_get(clock->src_mask, readl(clock->reg));
for (i = 0; i < clk_hw_get_num_parents(hw); i++) {
if (clock->parents[i] == hw_index)
return i;
@@ -191,7 +191,7 @@ static int cpg_div6_clock_set_parent(struct clk_hw *hw, u8 index)
if (index >= clk_hw_get_num_parents(hw))
return -EINVAL;
- src = clock->parents[index] << __ffs(clock->src_mask);
+ src = field_prep(clock->src_mask, clock->parents[index]);
writel((readl(clock->reg) & ~clock->src_mask) | src, clock->reg);
return 0;
}
diff --git a/drivers/clk/renesas/r8a779a0-cpg-mssr.c b/drivers/clk/renesas/r8a779a0-cpg-mssr.c
index 7df86743c5491292..f716e739d138b722 100644
--- a/drivers/clk/renesas/r8a779a0-cpg-mssr.c
+++ b/drivers/clk/renesas/r8a779a0-cpg-mssr.c
@@ -302,11 +302,7 @@ static unsigned long cpg_z_clk_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct cpg_z_clk *zclk = to_z_clk(hw);
- unsigned int mult;
- u32 val;
-
- val = readl(zclk->reg) & zclk->mask;
- mult = 32 - (val >> __ffs(zclk->mask));
+ unsigned int mult = 32 - field_get(zclk->mask, readl(zclk->reg));
return DIV_ROUND_CLOSEST_ULL((u64)parent_rate * mult,
32 * zclk->fixed_div);
@@ -357,7 +353,8 @@ static int cpg_z_clk_set_rate(struct clk_hw *hw, unsigned long rate,
if (readl(zclk->kick_reg) & CPG_FRQCRB_KICK)
return -EBUSY;
- cpg_reg_modify(zclk->reg, zclk->mask, (32 - mult) << __ffs(zclk->mask));
+ cpg_reg_modify(zclk->reg, zclk->mask,
+ field_prep(zclk->mask, 32 - mult));
/*
* Set KICK bit in FRQCRB to update hardware setting and wait for
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c
index a9816b1beabb2582..30bbe8418e018153 100644
--- a/drivers/clk/renesas/rcar-gen3-cpg.c
+++ b/drivers/clk/renesas/rcar-gen3-cpg.c
@@ -54,10 +54,8 @@ static unsigned long cpg_pll_clk_recalc_rate(struct clk_hw *hw,
{
struct cpg_pll_clk *pll_clk = to_pll_clk(hw);
unsigned int mult;
- u32 val;
- val = readl(pll_clk->pllcr_reg) & CPG_PLLnCR_STC_MASK;
- mult = (val >> __ffs(CPG_PLLnCR_STC_MASK)) + 1;
+ mult = FIELD_GET(CPG_PLLnCR_STC_MASK, readl(pll_clk->pllcr_reg)) + 1;
return parent_rate * mult * pll_clk->fixed_mult;
}
@@ -94,7 +92,7 @@ static int cpg_pll_clk_set_rate(struct clk_hw *hw, unsigned long rate,
val = readl(pll_clk->pllcr_reg);
val &= ~CPG_PLLnCR_STC_MASK;
- val |= (mult - 1) << __ffs(CPG_PLLnCR_STC_MASK);
+ val |= FIELD_PREP(CPG_PLLnCR_STC_MASK, mult - 1);
writel(val, pll_clk->pllcr_reg);
for (i = 1000; i; i--) {
@@ -176,11 +174,7 @@ static unsigned long cpg_z_clk_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct cpg_z_clk *zclk = to_z_clk(hw);
- unsigned int mult;
- u32 val;
-
- val = readl(zclk->reg) & zclk->mask;
- mult = 32 - (val >> __ffs(zclk->mask));
+ unsigned int mult = 32 - field_get(zclk->mask, readl(zclk->reg));
return DIV_ROUND_CLOSEST_ULL((u64)parent_rate * mult,
32 * zclk->fixed_div);
@@ -231,7 +225,8 @@ static int cpg_z_clk_set_rate(struct clk_hw *hw, unsigned long rate,
if (readl(zclk->kick_reg) & CPG_FRQCRB_KICK)
return -EBUSY;
- cpg_reg_modify(zclk->reg, zclk->mask, (32 - mult) << __ffs(zclk->mask));
+ cpg_reg_modify(zclk->reg, zclk->mask,
+ field_prep(zclk->mask, 32 - mult));
/*
* Set KICK bit in FRQCRB to update hardware setting and wait for
--
2.25.1
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