x86/platform/intel-mid: Enable spidev on Intel Edison boards

Intel Edison board provides one of the SPI bus for user's connected devices.

Append platform data to get spidev enumerated over it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Dan O'Donovan <dan@emutex.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1467677690-90007-1-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/platform/intel-mid/device_libs/Makefile b/arch/x86/platform/intel-mid/device_libs/Makefile
index 79e97ed..fc135bf 100644 (file)
--- a/arch/x86/platform/intel-mid/device_libs/Makefile
+++ b/arch/x86/platform/intel-mid/device_libs/Makefile
@@ -10,6 +10,8 @@ obj-$(subst m,y,$(CONFIG_MFD_INTEL_MSIC)) += platform_msic_battery.o
 obj-$(subst m,y,$(CONFIG_INTEL_MID_POWER_BUTTON)) += platform_msic_power_btn.o
 obj-$(subst m,y,$(CONFIG_GPIO_INTEL_PMIC)) += platform_pmic_gpio.o
 obj-$(subst m,y,$(CONFIG_INTEL_MFLD_THERMAL)) += platform_msic_thermal.o
+# SPI Devices
+obj-$(subst m,y,$(CONFIG_SPI_SPIDEV)) += platform_spidev.o
 # I2C Devices
 obj-$(subst m,y,$(CONFIG_SENSORS_EMC1403)) += platform_emc1403.o
 obj-$(subst m,y,$(CONFIG_SENSORS_LIS3LV02D)) += platform_lis331.o

diff --git a/arch/x86/platform/intel-mid/device_libs/platform_spidev.c b/arch/x86/platform/intel-mid/device_libs/platform_spidev.c
new file mode 100644 (file)
index 0000000..30c601b
--- /dev/null
+++ b/arch/x86/platform/intel-mid/device_libs/platform_spidev.c
@@ -0,0 +1,50 @@
+/*
+ * spidev platform data initilization file
+ *
+ * (C) Copyright 2014, 2016 Intel Corporation
+ * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+ *         Dan O'Donovan <dan@emutex.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#include <linux/init.h>
+#include <linux/sfi.h>
+#include <linux/spi/pxa2xx_spi.h>
+#include <linux/spi/spi.h>
+
+#include <asm/intel-mid.h>
+
+#define MRFLD_SPI_DEFAULT_DMA_BURST    8
+#define MRFLD_SPI_DEFAULT_TIMEOUT      500
+
+/* GPIO pin for spidev chipselect */
+#define MRFLD_SPIDEV_GPIO_CS           111
+
+static struct pxa2xx_spi_chip spidev_spi_chip = {
+       .dma_burst_size         = MRFLD_SPI_DEFAULT_DMA_BURST,
+       .timeout                = MRFLD_SPI_DEFAULT_TIMEOUT,
+       .gpio_cs                = MRFLD_SPIDEV_GPIO_CS,
+};
+
+static void __init *spidev_platform_data(void *info)
+{
+       struct spi_board_info *spi_info = info;
+
+       spi_info->mode = SPI_MODE_0;
+       spi_info->controller_data = &spidev_spi_chip;
+
+       return NULL;
+}
+
+static const struct devs_id spidev_dev_id __initconst = {
+       .name                   = "spidev",
+       .type                   = SFI_DEV_TYPE_SPI,
+       .delay                  = 0,
+       .get_platform_data      = &spidev_platform_data,
+};
+
+sfi_device(spidev_dev_id);