linux-kernel - [PATCH 02/20] mmc: dw_mmc-rockchip: switch to HWORD

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Message-Id: <20250612-byeword-update-v1-2-f4afb8f6313f@collabora.com>
Date: Thu, 12 Jun 2025 20:56:04 +0200
From: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
To: Yury Norov <yury.norov@...il.com>, 
 Rasmus Villemoes <linux@...musvillemoes.dk>, 
 Jaehoon Chung <jh80.chung@...sung.com>, 
 Ulf Hansson <ulf.hansson@...aro.org>, Heiko Stuebner <heiko@...ech.de>, 
 Shreeya Patel <shreeya.patel@...labora.com>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Sandy Huang <hjc@...k-chips.com>, Andy Yan <andy.yan@...k-chips.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Vinod Koul <vkoul@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>, 
 Nicolas Frattaroli <frattaroli.nicolas@...il.com>, 
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, 
 Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Maxime Coquelin <mcoquelin.stm32@...il.com>, 
 Alexandre Torgue <alexandre.torgue@...s.st.com>, 
 Shawn Lin <shawn.lin@...k-chips.com>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kwilczynski@...nel.org>, 
 Manivannan Sadhasivam <mani@...nel.org>, Rob Herring <robh@...nel.org>, 
 Bjorn Helgaas <bhelgaas@...gle.com>, Chanwoo Choi <cw00.choi@...sung.com>, 
 MyungJoo Ham <myungjoo.ham@...sung.com>, 
 Kyungmin Park <kyungmin.park@...sung.com>, Qin Jian <qinjian@...lus1.com>, 
 Michael Turquette <mturquette@...libre.com>, 
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 Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>
Cc: kernel@...labora.com, linux-kernel@...r.kernel.org, 
 linux-mmc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-media@...r.kernel.org, 
 dri-devel@...ts.freedesktop.org, linux-phy@...ts.infradead.org, 
 linux-sound@...r.kernel.org, netdev@...r.kernel.org, 
 linux-stm32@...md-mailman.stormreply.com, linux-pci@...r.kernel.org, 
 linux-pm@...r.kernel.org, linux-clk@...r.kernel.org, llvm@...ts.linux.dev, 
 Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Subject: [PATCH 02/20] mmc: dw_mmc-rockchip: switch to HWORD_UPDATE macro

The era of hand-rolled HIWORD_UPDATE macros is over, at least for those
drivers that use constant masks.

Switch to the new HWORD_UPDATE macro in bitfield.h, which has error
checking. Instead of redefining the driver's HIWORD_UPDATE macro in this
case, replace the two only instances of it with the new macro, as I
could test that they result in an equivalent value.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
---
 drivers/mmc/host/dw_mmc-rockchip.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c
index baa23b51773127b4137f472581259b61649273a5..9e3d17becf65ffb60fe3d32d2cdec341fbd30b1e 100644
--- a/drivers/mmc/host/dw_mmc-rockchip.c
+++ b/drivers/mmc/host/dw_mmc-rockchip.c
@@ -5,6 +5,7 @@

 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/bitfield.h>
 #include <linux/clk.h>
 #include <linux/mmc/host.h>
 #include <linux/of_address.h>
@@ -24,8 +25,6 @@
 #define ROCKCHIP_MMC_DELAYNUM_OFFSET	2
 #define ROCKCHIP_MMC_DELAYNUM_MASK	(0xff << ROCKCHIP_MMC_DELAYNUM_OFFSET)
 #define ROCKCHIP_MMC_DELAY_ELEMENT_PSEC	60
-#define HIWORD_UPDATE(val, mask, shift) \
-		((val) << (shift) | (mask) << ((shift) + 16))

 static const unsigned int freqs[] = { 100000, 200000, 300000, 400000 };

@@ -148,9 +147,9 @@ static int rockchip_mmc_set_internal_phase(struct dw_mci *host, bool sample, int
 	raw_value |= nineties;

 	if (sample)
-		mci_writel(host, TIMING_CON1, HIWORD_UPDATE(raw_value, 0x07ff, 1));
+		mci_writel(host, TIMING_CON1, HWORD_UPDATE(GENMASK(11, 1), raw_value));
 	else
-		mci_writel(host, TIMING_CON0, HIWORD_UPDATE(raw_value, 0x07ff, 1));
+		mci_writel(host, TIMING_CON0, HWORD_UPDATE(GENMASK(11, 1), raw_value));

 	dev_dbg(host->dev, "set %s_phase(%d) delay_nums=%u actual_degrees=%d\n",
 		sample ? "sample" : "drv", degrees, delay_num,

-- 
2.49.0