Several boards are using the built-in SPI controller of the
AR71XX/AR724X/AR913X SoCs. This patch adds common platform_device
and helper code to register it. Additionally, the patch registers
the SPI bus on the PB44 board.
Signed-off-by: Gabor Juhos <juhosg@xxxxxxxxxxx>
---
arch/mips/ath79/Kconfig | 4 ++
arch/mips/ath79/Makefile | 1 +
arch/mips/ath79/dev-spi.c | 38 ++++++++++++++++++++++++
arch/mips/ath79/dev-spi.h | 22 ++++++++++++++
arch/mips/ath79/mach-pb44.c | 17 ++++++++++
arch/mips/include/asm/mach-ath79/ar71xx_regs.h | 2 +
6 files changed, 84 insertions(+), 0 deletions(-)
create mode 100644 arch/mips/ath79/dev-spi.c
create mode 100644 arch/mips/ath79/dev-spi.h
diff --git a/arch/mips/ath79/Kconfig b/arch/mips/ath79/Kconfig
index 0c34db1..78f9999 100644
--- a/arch/mips/ath79/Kconfig
+++ b/arch/mips/ath79/Kconfig
@@ -7,6 +7,7 @@ config ATH79_MACH_PB44
select SOC_AR71XX
select ATH79_DEV_GPIO_BUTTONS
select ATH79_DEV_LEDS_GPIO
+ select ATH79_DEV_SPI
default n
help
Say 'Y' here if you want your kernel to support the
@@ -29,6 +30,9 @@ config ATH79_DEV_GPIO_BUTTONS
config ATH79_DEV_LEDS_GPIO
def_bool n
+config ATH79_DEV_SPI
+ def_bool n
+
config ATH79_DEV_UART
def_bool y
diff --git a/arch/mips/ath79/Makefile b/arch/mips/ath79/Makefile
index c604f46..875df71 100644
--- a/arch/mips/ath79/Makefile
+++ b/arch/mips/ath79/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_ATH79_DEV_GPIO_BUTTONS) += dev-gpio-buttons.o
obj-$(CONFIG_ATH79_DEV_LEDS_GPIO) += dev-leds-gpio.o
+obj-$(CONFIG_ATH79_DEV_SPI) += dev-spi.o
obj-$(CONFIG_ATH79_DEV_UART) += dev-uart.o
obj-$(CONFIG_ATH79_DEV_WDT) += dev-wdt.o
diff --git a/arch/mips/ath79/dev-spi.c b/arch/mips/ath79/dev-spi.c
new file mode 100644
index 0000000..aa30163
--- /dev/null
+++ b/arch/mips/ath79/dev-spi.c
@@ -0,0 +1,38 @@
+/*
+ * Atheros AR71XX/AR724X/AR913X SPI controller device
+ *
+ * Copyright (C) 2008-2010 Gabor Juhos <juhosg@xxxxxxxxxxx>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@xxxxxxxxxxx>
+ *
+ * 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 published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/platform_device.h>
+#include <asm/mach-ath79/ar71xx_regs.h>
+#include "dev-spi.h"
+
+static struct resource ath79_spi_resources[] = {
+ {
+ .start = AR71XX_SPI_BASE,
+ .end = AR71XX_SPI_BASE + AR71XX_SPI_SIZE - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct platform_device ath79_spi_device = {
+ .name = "ath79-spi",
+ .id = -1,
+ .resource = ath79_spi_resources,
+ .num_resources = ARRAY_SIZE(ath79_spi_resources),
+};
+
+void __init ath79_register_spi(struct ath79_spi_platform_data *pdata,
+ struct spi_board_info const *info,
+ unsigned n)
+{
+ spi_register_board_info(info, n);
+ ath79_spi_device.dev.platform_data = pdata;
+ platform_device_register(&ath79_spi_device);
+}
diff --git a/arch/mips/ath79/dev-spi.h b/arch/mips/ath79/dev-spi.h
new file mode 100644
index 0000000..9a98333
--- /dev/null
+++ b/arch/mips/ath79/dev-spi.h
@@ -0,0 +1,22 @@
+/*
+ * Atheros AR71XX/AR724X/AR913X SPI controller device
+ *
+ * Copyright (C) 2008-2010 Gabor Juhos <juhosg@xxxxxxxxxxx>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@xxxxxxxxxxx>
+ *
+ * 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 published
+ * by the Free Software Foundation.
+ */
+
+#ifndef _ATH79_DEV_SPI_H
+#define _ATH79_DEV_SPI_H
+
+#include <linux/spi/spi.h>
+#include <asm/mach-ath79/ath79_spi_platform.h>
+
+void __init ath79_register_spi(struct ath79_spi_platform_data *pdata,
+ struct spi_board_info const *info,
+ unsigned n);
+
+#endif /* _ATH79_DEV_SPI_H */
diff --git a/arch/mips/ath79/mach-pb44.c b/arch/mips/ath79/mach-pb44.c
index 5e7b544..257815e 100644
--- a/arch/mips/ath79/mach-pb44.c
+++ b/arch/mips/ath79/mach-pb44.c
@@ -17,6 +17,7 @@
#include "machtypes.h"
#include "dev-gpio-buttons.h"
#include "dev-leds-gpio.h"
+#include "dev-spi.h"
#define PB44_GPIO_I2C_SCL 0
#define PB44_GPIO_I2C_SDA 1
@@ -83,6 +84,20 @@ static struct gpio_button pb44_gpio_buttons[] __initdata = {
}
};
+static struct spi_board_info pb44_spi_info[] = {
+ {
+ .bus_num = 0,
+ .chip_select = 0,
+ .max_speed_hz = 25000000,
+ .modalias = "m25p64",
+ },
+};
+
+static struct ath79_spi_platform_data pb44_spi_data = {
+ .bus_num = 0,
+ .num_chipselect = 1,
+};
+
static void __init pb44_init(void)
{
i2c_register_board_info(0, pb44_i2c_board_info,
@@ -94,6 +109,8 @@ static void __init pb44_init(void)
ath79_register_gpio_buttons(-1, PB44_BUTTONS_POLL_INTERVAL,
ARRAY_SIZE(pb44_gpio_buttons),
pb44_gpio_buttons);
+ ath79_register_spi(&pb44_spi_data, pb44_spi_info,
+ ARRAY_SIZE(pb44_spi_info));
}
MIPS_MACHINE(ATH79_MACH_PB44, "PB44", "Atheros PB44 reference board",
diff --git a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
index 7f2933d..4f2b621 100644
--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
+++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
@@ -20,6 +20,8 @@
#include <linux/bitops.h>
#define AR71XX_APB_BASE 0x18000000
+#define AR71XX_SPI_BASE 0x1f000000
+#define AR71XX_SPI_SIZE 0x01000000
#define AR71XX_DDR_CTRL_BASE (AR71XX_APB_BASE + 0x00000000)
#define AR71XX_DDR_CTRL_SIZE 0x100
--
1.7.2.1
