staging: wfx: use meaningful names for CFG_BYTE_ORDER_*

This new naming allows to save a comment.
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20191217161318.31402-18-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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)

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);

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