spi: convert spi-bfin-v3.c to a multiplatform driver

Spi v3 controller is not only used on Blackfin. So rename it
and use ioread/iowrite api to make it work on other platform.
Signed-off-by: NScott Jiang <scott.jiang.linux@gmail.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

arch/blackfin/mach-bf609/boards/ezkit.c

@@ -20,7 +20,7 @@
 #include <linux/pinctrl/machine.h>
 #include <linux/pinctrl/pinconf-generic.h>
 #include <linux/platform_data/pinctrl-adi2.h>
-#include <asm/bfin_spi3.h>
+#include <linux/spi/adi_spi3.h>
 #include <asm/dma.h>
 #include <asm/gpio.h>
 #include <asm/nand.h>
@@ -767,13 +767,13 @@ static struct flash_platform_data bfin_spi_flash_data = {
 	.type = "w25q32",
 };
 
-static struct bfin_spi3_chip spi_flash_chip_info = {
+static struct adi_spi3_chip spi_flash_chip_info = {
 	.enable_dma = true,         /* use dma transfer with this chip*/
 };
 #endif
 
 #if IS_ENABLED(CONFIG_SPI_SPIDEV)
-static struct bfin_spi3_chip spidev_chip_info = {
+static struct adi_spi3_chip spidev_chip_info = {
 	.enable_dma = true,
 };
 #endif
@@ -1736,7 +1736,7 @@ static struct spi_board_info bfin_spi_board_info[] __initdata = {
 	},
 #endif
 };
-#if IS_ENABLED(CONFIG_SPI_BFIN_V3)
+#if IS_ENABLED(CONFIG_SPI_ADI_V3)
 /* SPI (0) */
 static struct resource bfin_spi0_resource[] = {
 	{
@@ -1777,13 +1777,13 @@ static struct resource bfin_spi1_resource[] = {
 };
 
 /* SPI controller data */
-static struct bfin_spi3_master bf60x_spi_master_info0 = {
+static struct adi_spi3_master bf60x_spi_master_info0 = {
 	.num_chipselect = MAX_CTRL_CS + MAX_BLACKFIN_GPIOS,
 	.pin_req = {P_SPI0_SCK, P_SPI0_MISO, P_SPI0_MOSI, 0},
 };
 
 static struct platform_device bf60x_spi_master0 = {
-	.name = "bfin-spi3",
+	.name = "adi-spi3",
 	.id = 0, /* Bus number */
 	.num_resources = ARRAY_SIZE(bfin_spi0_resource),
 	.resource = bfin_spi0_resource,
@@ -1792,13 +1792,13 @@ static struct platform_device bf60x_spi_master0 = {
 	},
 };
 
-static struct bfin_spi3_master bf60x_spi_master_info1 = {
+static struct adi_spi3_master bf60x_spi_master_info1 = {
 	.num_chipselect = MAX_CTRL_CS + MAX_BLACKFIN_GPIOS,
 	.pin_req = {P_SPI1_SCK, P_SPI1_MISO, P_SPI1_MOSI, 0},
 };
 
 static struct platform_device bf60x_spi_master1 = {
-	.name = "bfin-spi3",
+	.name = "adi-spi3",
 	.id = 1, /* Bus number */
 	.num_resources = ARRAY_SIZE(bfin_spi1_resource),
 	.resource = bfin_spi1_resource,
@@ -1990,7 +1990,7 @@ static struct platform_device *ezkit_devices[] __initdata = {
 	&bfin_sdh_device,
 #endif
 
-#if IS_ENABLED(CONFIG_SPI_BFIN_V3)
+#if IS_ENABLED(CONFIG_SPI_ADI_V3)
 	&bf60x_spi_master0,
 	&bf60x_spi_master1,
 #endif
@@ -2051,8 +2051,8 @@ static struct pinctrl_map __initdata bfin_pinmux_map[] = {
 	PIN_MAP_MUX_GROUP_DEFAULT("bfin_sir.1",  "pinctrl-adi2.0", NULL, "uart1"),
 	PIN_MAP_MUX_GROUP_DEFAULT("bfin-sdh.0",  "pinctrl-adi2.0", NULL, "rsi0"),
 	PIN_MAP_MUX_GROUP_DEFAULT("stmmaceth.0",  "pinctrl-adi2.0", NULL, "eth0"),
-	PIN_MAP_MUX_GROUP_DEFAULT("bfin-spi3.0",  "pinctrl-adi2.0", NULL, "spi0"),
-	PIN_MAP_MUX_GROUP_DEFAULT("bfin-spi3.1",  "pinctrl-adi2.0", NULL, "spi1"),
+	PIN_MAP_MUX_GROUP_DEFAULT("adi-spi3.0",  "pinctrl-adi2.0", NULL, "spi0"),
+	PIN_MAP_MUX_GROUP_DEFAULT("adi-spi3.1",  "pinctrl-adi2.0", NULL, "spi1"),
 	PIN_MAP_MUX_GROUP_DEFAULT("i2c-bfin-twi.0",  "pinctrl-adi2.0", NULL, "twi0"),
 	PIN_MAP_MUX_GROUP_DEFAULT("i2c-bfin-twi.1",  "pinctrl-adi2.0", NULL, "twi1"),
 	PIN_MAP_MUX_GROUP_DEFAULT("bfin-rotary",  "pinctrl-adi2.0", NULL, "rotary"),

drivers/spi/Kconfig

@@ -91,8 +91,8 @@ config SPI_BFIN5XX
 	help
 	  This is the SPI controller master driver for Blackfin 5xx processor.
 
-config SPI_BFIN_V3
-	tristate "SPI controller v3 for Blackfin"
+config SPI_ADI_V3
+	tristate "SPI controller v3 for ADI"
 	depends on BF60x
 	help
 	  This is the SPI controller v3 master driver

drivers/spi/Makefile

@@ -18,7 +18,7 @@ obj-$(CONFIG_SPI_BCM2835)		+= spi-bcm2835.o
 obj-$(CONFIG_SPI_BCM63XX)		+= spi-bcm63xx.o
 obj-$(CONFIG_SPI_BCM63XX_HSSPI)		+= spi-bcm63xx-hsspi.o
 obj-$(CONFIG_SPI_BFIN5XX)		+= spi-bfin5xx.o
-obj-$(CONFIG_SPI_BFIN_V3)               += spi-bfin-v3.o
+obj-$(CONFIG_SPI_ADI_V3)                += spi-adi-v3.o
 obj-$(CONFIG_SPI_BFIN_SPORT)		+= spi-bfin-sport.o
 obj-$(CONFIG_SPI_BITBANG)		+= spi-bitbang.o
 obj-$(CONFIG_SPI_BUTTERFLY)		+= spi-butterfly.o

arch/blackfin/include/asm/bfin_spi3.h → include/linux/spi/adi_spi3.h

 /*
  * Analog Devices SPI3 controller driver
  *
- * Copyright (c) 2011 Analog Devices Inc.
+ * Copyright (c) 2014 Analog Devices Inc.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -11,14 +11,10 @@
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#ifndef _SPI_CHANNEL_H_
-#define _SPI_CHANNEL_H_
+#ifndef _ADI_SPI3_H_
+#define _ADI_SPI3_H_
 
 #include <linux/types.h>
 
@@ -209,9 +205,9 @@
 #define SPI_ILAT_CLR_TFI            0x00000800    /* Transmit Finish Indication */
 
 /*
- * bfin spi3 registers layout
+ * adi spi3 registers layout
  */
-struct bfin_spi_regs {
+struct adi_spi_regs {
 	u32 revid;
 	u32 control;
 	u32 rx_control;
@@ -240,7 +236,7 @@ struct bfin_spi_regs {
 #define MAX_CTRL_CS          8  /* cs in spi controller */
 
 /* device.platform_data for SSP controller devices */
-struct bfin_spi3_master {
+struct adi_spi3_master {
 	u16 num_chipselect;
 	u16 pin_req[7];
 };
@@ -248,11 +244,11 @@ struct bfin_spi3_master {
 /* spi_board_info.controller_data for SPI slave devices,
  * copied to spi_device.platform_data ... mostly for dma tuning
  */
-struct bfin_spi3_chip {
+struct adi_spi3_chip {
 	u32 control;
 	u16 cs_chg_udelay; /* Some devices require 16-bit delays */
 	u32 tx_dummy_val; /* tx value for rx only transfer */
 	bool enable_dma;
 };
 
-#endif /* _SPI_CHANNEL_H_ */
+#endif /* _ADI_SPI3_H_ */