linux-kernel - [PATCH 17/55] staging: wfx: use meaningful names for CFG_BYTE_ORDER

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Message-ID: <20191216170302.29543-18-Jerome.Pouiller@silabs.com>
Date:   Mon, 16 Dec 2019 17:03:42 +0000
From:   Jérôme Pouiller <Jerome.Pouiller@...abs.com>
To:     "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jérôme Pouiller <Jerome.Pouiller@...abs.com>
Subject: [PATCH 17/55] staging: wfx: use meaningful names for CFG_BYTE_ORDER_*

From: Jérôme Pouiller <jerome.pouiller@...abs.com>

This new naming allows to save a comment.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
---
 drivers/staging/wfx/bus_spi.c |  2 ++
 drivers/staging/wfx/fwio.c    |  2 +-
 drivers/staging/wfx/hwio.h    | 15 +++++----------
 3 files changed, 8 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/wfx/bus_spi.c b/drivers/staging/wfx/bus_spi.c
index 0a055c4041af..40bc33035de2 100644
--- a/drivers/staging/wfx/bus_spi.c
+++ b/drivers/staging/wfx/bus_spi.c
@@ -107,6 +107,8 @@ static int wfx_spi_copy_to_io(void *priv, unsigned int addr,
 
 	cpu_to_le16s(&regaddr);
 
+	// Register address and CONFIG content always use 16bit big endian
+	// ("BADC" order)
 	if (bus->need_swab)
 		swab16s(&regaddr);
 	if (bus->need_swab && addr == WFX_REG_CONFIG)
diff --git a/drivers/staging/wfx/fwio.c b/drivers/staging/wfx/fwio.c
index 47e627bf0f8e..9d61082c1e6c 100644
--- a/drivers/staging/wfx/fwio.c
+++ b/drivers/staging/wfx/fwio.c
@@ -339,7 +339,7 @@ int wfx_init_device(struct wfx_dev *wdev)
 	ktime_t now, start;
 	u32 reg;
 
-	reg = CFG_DIRECT_ACCESS_MODE | CFG_CPU_RESET | CFG_WORD_MODE2;
+	reg = CFG_DIRECT_ACCESS_MODE | CFG_CPU_RESET | CFG_BYTE_ORDER_ABCD;
 	if (wdev->pdata.use_rising_clk)
 		reg |= CFG_CLK_RISE_EDGE;
 	ret = config_reg_write(wdev, reg);
diff --git a/drivers/staging/wfx/hwio.h b/drivers/staging/wfx/hwio.h
index b2c1a66de963..4b6ef061b40b 100644
--- a/drivers/staging/wfx/hwio.h
+++ b/drivers/staging/wfx/hwio.h
@@ -37,16 +37,11 @@ int ahb_reg_write(struct wfx_dev *wdev, u32 addr, u32 val);
 #define CFG_ERR_HOST_NO_IN_QUEUE   0x00000040
 #define CFG_ERR_HOST_CRC_MISS      0x00000080 // only with SDIO
 #define CFG_SPI_IGNORE_CS          0x00000080 // only with SPI
-/* Bytes ordering (only writable in SPI): */
-#define CFG_WORD_MODE_MASK         0x00000300
-/*
- * B1,B0,B3,B2 (In SPI, register address and
- * CONFIG data always use this mode)
- */
-#define     CFG_WORD_MODE0         0x00000000
-#define     CFG_WORD_MODE1         0x00000100 //   B3,B2,B1,B0
-#define     CFG_WORD_MODE2         0x00000200 //   B0,B1,B2,B3 (SDIO)
-#define CFG_DIRECT_ACCESS_MODE     0x00000400 // Direct or queue access mode
+#define CFG_BYTE_ORDER_MASK        0x00000300 // only writable with SPI
+#define     CFG_BYTE_ORDER_BADC    0x00000000
+#define     CFG_BYTE_ORDER_DCBA    0x00000100
+#define     CFG_BYTE_ORDER_ABCD    0x00000200 // SDIO always use this value
+#define CFG_DIRECT_ACCESS_MODE     0x00000400
 #define CFG_PREFETCH_AHB           0x00000800
 #define CFG_DISABLE_CPU_CLK        0x00001000
 #define CFG_PREFETCH_SRAM          0x00002000
-- 
2.20.1