netdev - [PATCH lora-next v2 6/8] net: lora: sx1301: replace version and size magic numbers with defines

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Message-Id: <1533818018-29005-6-git-send-email-ben.whitten@lairdtech.com>
Date:   Thu,  9 Aug 2018 13:33:36 +0100
From:   Ben Whitten <ben.whitten@...il.com>
To:     afaerber@...e.de
Cc:     starnight@...cu.edu.tw, hasnain.virk@....com,
        netdev@...r.kernel.org, liuxuenetmail@...il.com, shess@...sware.de,
        Ben Whitten <ben.whitten@...rdtech.com>
Subject: [PATCH lora-next v2 6/8] net: lora: sx1301: replace version and size magic numbers with defines

We replace the hard coded numbers for size and version with meaningful
names.

Signed-off-by: Ben Whitten <ben.whitten@...rdtech.com>
---
 drivers/net/lora/sx1301.c | 21 +++++++++++++--------
 drivers/net/lora/sx1301.h | 18 ++++++++++++++++++
 2 files changed, 31 insertions(+), 8 deletions(-)
 create mode 100644 drivers/net/lora/sx1301.h

diff --git a/drivers/net/lora/sx1301.c b/drivers/net/lora/sx1301.c
index 916ee40..8e81179 100644
--- a/drivers/net/lora/sx1301.c
+++ b/drivers/net/lora/sx1301.c
@@ -21,6 +21,8 @@
 #include <linux/lora/dev.h>
 #include <linux/spi/spi.h>
 
+#include "sx1301.h"
+
 #define REG_PAGE_RESET			0
 #define REG_VERSION			1
 #define REG_MCU_PROM_ADDR		9
@@ -293,7 +295,7 @@ static int sx1301_load_firmware(struct sx1301_priv *priv, int mcu, const struct
 	u8 val, rst, select_mux;
 	int ret;
 
-	if (fw->size != 8192) {
+	if (fw->size != SX1301_MCU_FW_BYTE) {
 		dev_err(priv->dev, "Unexpected firmware size\n");
 		return -EINVAL;
 	}
@@ -445,8 +447,9 @@ static int sx1301_agc_calibrate(struct sx1301_priv *priv)
 
 	dev_info(priv->dev, "AGC calibration firmware version %u\n", (unsigned)val);
 
-	if (val != 2) {
-		dev_err(priv->dev, "unexpected firmware version, expecting %u\n", 2);
+	if (val != SX1301_MCU_AGC_CAL_FW_VERSION) {
+		dev_err(priv->dev, "unexpected firmware version, expecting %u\n",
+				SX1301_MCU_AGC_CAL_FW_VERSION);
 		return -ENXIO;
 	}
 
@@ -572,8 +575,9 @@ static int sx1301_load_all_firmware(struct sx1301_priv *priv)
 
 	dev_info(priv->dev, "AGC firmware version %u\n", (unsigned)val);
 
-	if (val != 4) {
-		dev_err(priv->dev, "unexpected firmware version, expecting %u\n", 4);
+	if (val != SX1301_MCU_AGC_FW_VERSION) {
+		dev_err(priv->dev, "unexpected firmware version, expecting %u\n",
+				SX1301_MCU_AGC_FW_VERSION);
 		return -ENXIO;
 	}
 
@@ -585,8 +589,9 @@ static int sx1301_load_all_firmware(struct sx1301_priv *priv)
 
 	dev_info(priv->dev, "ARB firmware version %u\n", (unsigned)val);
 
-	if (val != 1) {
-		dev_err(priv->dev, "unexpected firmware version, expecting %u\n", 1);
+	if (val != SX1301_MCU_ARB_FW_VERSION) {
+		dev_err(priv->dev, "unexpected firmware version, expecting %u\n",
+				SX1301_MCU_ARB_FW_VERSION);
 		return -ENXIO;
 	}
 
@@ -642,7 +647,7 @@ static int sx1301_probe(struct spi_device *spi)
 		return ret;
 	}
 
-	if (val != 103) {
+	if (val != SX1301_CHIP_VERSION) {
 		dev_err(&spi->dev, "unexpected version: %u\n", val);
 		return -ENXIO;
 	}
diff --git a/drivers/net/lora/sx1301.h b/drivers/net/lora/sx1301.h
new file mode 100644
index 0000000..b37ac56
--- /dev/null
+++ b/drivers/net/lora/sx1301.h
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Semtech SX1301 lora concentrator
+ *
+ * Copyright (c) 2018   Ben Whitten
+ */
+
+#ifndef _SX1301_
+#define _SX1301_
+
+#define SX1301_CHIP_VERSION 103
+
+#define SX1301_MCU_FW_BYTE 8192
+#define SX1301_MCU_ARB_FW_VERSION 1
+#define SX1301_MCU_AGC_FW_VERSION 4
+#define SX1301_MCU_AGC_CAL_FW_VERSION 2
+
+#endif
-- 
2.7.4