net: dsa: microchip: common ksz_spi_probe for ksz switches

As of now, there are two spi probes, one ksz8795_spi.c and other
ksz9477_spi.c. This patch combines two files into single ksz_spi.c. The
difference between the two are regmap config and struct ksz8. The regmap
config is assigned based on the platform data. And struct ksz8 is left
untouched, as it is used only ksz8795.c. It can be used for all
other switches also in future.

Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 69 insertions, 183 deletions

diff --git a/drivers/net/dsa/microchip/Kconfig b/drivers/net/dsa/microchip/Kconfig
index d21ff069e5aa..2edb88080790 100644
--- a/drivers/net/dsa/microchip/Kconfig
+++ b/drivers/net/dsa/microchip/Kconfig
@@ -8,29 +8,19 @@ menuconfig NET_DSA_MICROCHIP_KSZ_COMMON
 	  KSZ8795/KSZ88x3 switch chips.
 
 config NET_DSA_MICROCHIP_KSZ9477_I2C
-	tristate "KSZ9477 series I2C connected switch driver"
+	tristate "KSZ series I2C connected switch driver"
 	depends on NET_DSA_MICROCHIP_KSZ_COMMON && I2C
 	select REGMAP_I2C
 	help
 	  Select to enable support for registering switches configured through I2C.
 
-config NET_DSA_MICROCHIP_KSZ9477_SPI
-	tristate "KSZ9477 series SPI connected switch driver"
+config NET_DSA_MICROCHIP_KSZ_SPI
+	tristate "KSZ series SPI connected switch driver"
 	depends on NET_DSA_MICROCHIP_KSZ_COMMON && SPI
 	select REGMAP_SPI
 	help
 	  Select to enable support for registering switches configured through SPI.
 
-config NET_DSA_MICROCHIP_KSZ8795_SPI
-	tristate "KSZ8795 series SPI connected switch driver"
-	depends on NET_DSA_MICROCHIP_KSZ_COMMON && SPI
-	select REGMAP_SPI
-	help
-	  This driver accesses KSZ8795 chip through SPI.
-
-	  It is required to use the KSZ8795 switch driver as the only access
-	  is through SPI.
-
 config NET_DSA_MICROCHIP_KSZ8863_SMI
 	tristate "KSZ series SMI connected switch driver"
 	depends on NET_DSA_MICROCHIP_KSZ_COMMON
diff --git a/drivers/net/dsa/microchip/Makefile b/drivers/net/dsa/microchip/Makefile
index 4cf4755e6426..b2ba7c1bcb93 100644
--- a/drivers/net/dsa/microchip/Makefile
+++ b/drivers/net/dsa/microchip/Makefile
@@ -4,6 +4,5 @@ ksz_switch-objs := ksz_common.o
 ksz_switch-objs += ksz9477.o
 ksz_switch-objs += ksz8795.o
 obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ9477_I2C)	+= ksz9477_i2c.o
-obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ9477_SPI)	+= ksz9477_spi.o
-obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ8795_SPI)	+= ksz8795_spi.o
+obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ_SPI)		+= ksz_spi.o
 obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ8863_SMI)	+= ksz8863_smi.o
diff --git a/drivers/net/dsa/microchip/ksz9477_spi.c b/drivers/net/dsa/microchip/ksz9477_spi.c
deleted file mode 100644
index 2ee0601bc014..000000000000
--- a/drivers/net/dsa/microchip/ksz9477_spi.c
+++ /dev/null
@@ -1,150 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Microchip KSZ9477 series register access through SPI
- *
- * Copyright (C) 2017-2019 Microchip Technology Inc.
- */
-
-#include <asm/unaligned.h>
-
-#include <linux/delay.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/regmap.h>
-#include <linux/spi/spi.h>
-
-#include "ksz_common.h"
-
-#define SPI_ADDR_SHIFT			24
-#define SPI_ADDR_ALIGN			3
-#define SPI_TURNAROUND_SHIFT		5
-
-KSZ_REGMAP_TABLE(ksz9477, 32, SPI_ADDR_SHIFT,
-		 SPI_TURNAROUND_SHIFT, SPI_ADDR_ALIGN);
-
-static int ksz9477_spi_probe(struct spi_device *spi)
-{
-	struct regmap_config rc;
-	struct ksz_device *dev;
-	int i, ret;
-
-	dev = ksz_switch_alloc(&spi->dev, spi);
-	if (!dev)
-		return -ENOMEM;
-
-	for (i = 0; i < ARRAY_SIZE(ksz9477_regmap_config); i++) {
-		rc = ksz9477_regmap_config[i];
-		rc.lock_arg = &dev->regmap_mutex;
-		dev->regmap[i] = devm_regmap_init_spi(spi, &rc);
-		if (IS_ERR(dev->regmap[i])) {
-			ret = PTR_ERR(dev->regmap[i]);
-			dev_err(&spi->dev,
-				"Failed to initialize regmap%i: %d\n",
-				ksz9477_regmap_config[i].val_bits, ret);
-			return ret;
-		}
-	}
-
-	if (spi->dev.platform_data)
-		dev->pdata = spi->dev.platform_data;
-
-	/* setup spi */
-	spi->mode = SPI_MODE_3;
-	ret = spi_setup(spi);
-	if (ret)
-		return ret;
-
-	ret = ksz_switch_register(dev);
-
-	/* Main DSA driver may not be started yet. */
-	if (ret)
-		return ret;
-
-	spi_set_drvdata(spi, dev);
-
-	return 0;
-}
-
-static void ksz9477_spi_remove(struct spi_device *spi)
-{
-	struct ksz_device *dev = spi_get_drvdata(spi);
-
-	if (dev)
-		ksz_switch_remove(dev);
-
-	spi_set_drvdata(spi, NULL);
-}
-
-static void ksz9477_spi_shutdown(struct spi_device *spi)
-{
-	struct ksz_device *dev = spi_get_drvdata(spi);
-
-	if (dev)
-		dsa_switch_shutdown(dev->ds);
-
-	spi_set_drvdata(spi, NULL);
-}
-
-static const struct of_device_id ksz9477_dt_ids[] = {
-	{
-		.compatible = "microchip,ksz9477",
-		.data = &ksz_switch_chips[KSZ9477]
-	},
-	{
-		.compatible = "microchip,ksz9897",
-		.data = &ksz_switch_chips[KSZ9897]
-	},
-	{
-		.compatible = "microchip,ksz9893",
-		.data = &ksz_switch_chips[KSZ9893]
-	},
-	{
-		.compatible = "microchip,ksz9563",
-		.data = &ksz_switch_chips[KSZ9893]
-	},
-	{
-		.compatible = "microchip,ksz8563",
-		.data = &ksz_switch_chips[KSZ9893]
-	},
-	{
-		.compatible = "microchip,ksz9567",
-		.data = &ksz_switch_chips[KSZ9567]
-	},
-	{},
-};
-MODULE_DEVICE_TABLE(of, ksz9477_dt_ids);
-
-static const struct spi_device_id ksz9477_spi_ids[] = {
-	{ "ksz9477" },
-	{ "ksz9897" },
-	{ "ksz9893" },
-	{ "ksz9563" },
-	{ "ksz8563" },
-	{ "ksz9567" },
-	{ },
-};
-MODULE_DEVICE_TABLE(spi, ksz9477_spi_ids);
-
-static struct spi_driver ksz9477_spi_driver = {
-	.driver = {
-		.name	= "ksz9477-switch",
-		.owner	= THIS_MODULE,
-		.of_match_table = of_match_ptr(ksz9477_dt_ids),
-	},
-	.id_table = ksz9477_spi_ids,
-	.probe	= ksz9477_spi_probe,
-	.remove	= ksz9477_spi_remove,
-	.shutdown = ksz9477_spi_shutdown,
-};
-
-module_spi_driver(ksz9477_spi_driver);
-
-MODULE_ALIAS("spi:ksz9477");
-MODULE_ALIAS("spi:ksz9897");
-MODULE_ALIAS("spi:ksz9893");
-MODULE_ALIAS("spi:ksz9563");
-MODULE_ALIAS("spi:ksz8563");
-MODULE_ALIAS("spi:ksz9567");
-MODULE_AUTHOR("Woojung Huh <Woojung.Huh@microchip.com>");
-MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch SPI access Driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/net/dsa/microchip/ksz8795_spi.c b/drivers/net/dsa/microchip/ksz_spi.c
index 9d74e59624a6..344ff92db099 100644
--- a/drivers/net/dsa/microchip/ksz8795_spi.c
+++ b/drivers/net/dsa/microchip/ksz_spi.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
- * Microchip KSZ8795 series register access through SPI
+ * Microchip ksz series register access through SPI
  *
  * Copyright (C) 2017 Microchip Technology Inc.
  *	Tristram Ha <Tristram.Ha@microchip.com>
@@ -25,13 +25,20 @@
 #define KSZ8863_SPI_ADDR_ALIGN			8
 #define KSZ8863_SPI_TURNAROUND_SHIFT		0
 
+#define KSZ9477_SPI_ADDR_SHIFT			24
+#define KSZ9477_SPI_ADDR_ALIGN			3
+#define KSZ9477_SPI_TURNAROUND_SHIFT		5
+
 KSZ_REGMAP_TABLE(ksz8795, 16, KSZ8795_SPI_ADDR_SHIFT,
 		 KSZ8795_SPI_TURNAROUND_SHIFT, KSZ8795_SPI_ADDR_ALIGN);
 
 KSZ_REGMAP_TABLE(ksz8863, 16, KSZ8863_SPI_ADDR_SHIFT,
 		 KSZ8863_SPI_TURNAROUND_SHIFT, KSZ8863_SPI_ADDR_ALIGN);
 
-static int ksz8795_spi_probe(struct spi_device *spi)
+KSZ_REGMAP_TABLE(ksz9477, 32, KSZ9477_SPI_ADDR_SHIFT,
+		 KSZ9477_SPI_TURNAROUND_SHIFT, KSZ9477_SPI_ADDR_ALIGN);
+
+static int ksz_spi_probe(struct spi_device *spi)
 {
 	const struct regmap_config *regmap_config;
 	const struct ksz_chip_data *chip;
@@ -57,8 +64,12 @@ static int ksz8795_spi_probe(struct spi_device *spi)
 
 	if (chip->chip_id == KSZ8830_CHIP_ID)
 		regmap_config = ksz8863_regmap_config;
-	else
+	else if (chip->chip_id == KSZ8795_CHIP_ID ||
+		 chip->chip_id == KSZ8794_CHIP_ID ||
+		 chip->chip_id == KSZ8765_CHIP_ID)
 		regmap_config = ksz8795_regmap_config;
+	else
+		regmap_config = ksz9477_regmap_config;
 
 	for (i = 0; i < ARRAY_SIZE(ksz8795_regmap_config); i++) {
 		rc = regmap_config[i];
@@ -93,7 +104,7 @@ static int ksz8795_spi_probe(struct spi_device *spi)
 	return 0;
 }
 
-static void ksz8795_spi_remove(struct spi_device *spi)
+static void ksz_spi_remove(struct spi_device *spi)
 {
 	struct ksz_device *dev = spi_get_drvdata(spi);
 
@@ -103,7 +114,7 @@ static void ksz8795_spi_remove(struct spi_device *spi)
 	spi_set_drvdata(spi, NULL);
 }
 
-static void ksz8795_spi_shutdown(struct spi_device *spi)
+static void ksz_spi_shutdown(struct spi_device *spi)
 {
 	struct ksz_device *dev = spi_get_drvdata(spi);
 
@@ -118,7 +129,7 @@ static void ksz8795_spi_shutdown(struct spi_device *spi)
 	spi_set_drvdata(spi, NULL);
 }
 
-static const struct of_device_id ksz8795_dt_ids[] = {
+static const struct of_device_id ksz_dt_ids[] = {
 	{
 		.compatible = "microchip,ksz8765",
 		.data = &ksz_switch_chips[KSZ8765]
@@ -139,34 +150,70 @@ static const struct of_device_id ksz8795_dt_ids[] = {
 		.compatible = "microchip,ksz8873",
 		.data = &ksz_switch_chips[KSZ8830]
 	},
+	{
+		.compatible = "microchip,ksz9477",
+		.data = &ksz_switch_chips[KSZ9477]
+	},
+	{
+		.compatible = "microchip,ksz9897",
+		.data = &ksz_switch_chips[KSZ9897]
+	},
+	{
+		.compatible = "microchip,ksz9893",
+		.data = &ksz_switch_chips[KSZ9893]
+	},
+	{
+		.compatible = "microchip,ksz9563",
+		.data = &ksz_switch_chips[KSZ9893]
+	},
+	{
+		.compatible = "microchip,ksz8563",
+		.data = &ksz_switch_chips[KSZ9893]
+	},
+	{
+		.compatible = "microchip,ksz9567",
+		.data = &ksz_switch_chips[KSZ9567]
+	},
 	{},
 };
-MODULE_DEVICE_TABLE(of, ksz8795_dt_ids);
+MODULE_DEVICE_TABLE(of, ksz_dt_ids);
 
-static const struct spi_device_id ksz8795_spi_ids[] = {
+static const struct spi_device_id ksz_spi_ids[] = {
 	{ "ksz8765" },
 	{ "ksz8794" },
 	{ "ksz8795" },
 	{ "ksz8863" },
 	{ "ksz8873" },
+	{ "ksz9477" },
+	{ "ksz9897" },
+	{ "ksz9893" },
+	{ "ksz9563" },
+	{ "ksz8563" },
+	{ "ksz9567" },
 	{ },
 };
-MODULE_DEVICE_TABLE(spi, ksz8795_spi_ids);
+MODULE_DEVICE_TABLE(spi, ksz_spi_ids);
 
-static struct spi_driver ksz8795_spi_driver = {
+static struct spi_driver ksz_spi_driver = {
 	.driver = {
-		.name	= "ksz8795-switch",
+		.name	= "ksz-switch",
 		.owner	= THIS_MODULE,
-		.of_match_table = of_match_ptr(ksz8795_dt_ids),
+		.of_match_table = of_match_ptr(ksz_dt_ids),
 	},
-	.id_table = ksz8795_spi_ids,
-	.probe	= ksz8795_spi_probe,
-	.remove	= ksz8795_spi_remove,
-	.shutdown = ksz8795_spi_shutdown,
+	.id_table = ksz_spi_ids,
+	.probe	= ksz_spi_probe,
+	.remove	= ksz_spi_remove,
+	.shutdown = ksz_spi_shutdown,
 };
 
-module_spi_driver(ksz8795_spi_driver);
+module_spi_driver(ksz_spi_driver);
 
+MODULE_ALIAS("spi:ksz9477");
+MODULE_ALIAS("spi:ksz9897");
+MODULE_ALIAS("spi:ksz9893");
+MODULE_ALIAS("spi:ksz9563");
+MODULE_ALIAS("spi:ksz8563");
+MODULE_ALIAS("spi:ksz9567");
 MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
-MODULE_DESCRIPTION("Microchip KSZ8795 Series Switch SPI Driver");
+MODULE_DESCRIPTION("Microchip ksz Series Switch SPI Driver");
 MODULE_LICENSE("GPL");