[PATCH v1 1/1] x86/platform/intel-mid: Enable spidev on Intel Edison

* [PATCH v1 1/1] x86/platform/intel-mid: Enable spidev on Intel Edison
@ 2016-07-05  0:14 Andy Shevchenko
  2016-07-08 12:05 ` [tip:x86/platform] x86/platform/intel-mid: Enable spidev on Intel Edison boards tip-bot for Andy Shevchenko
  0 siblings, 1 reply; 2+ messages in thread
From: Andy Shevchenko @ 2016-07-05  0:14 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, H. Peter Anvin, linux-kernel, x86
  Cc: Andy Shevchenko, Dan O'Donovan

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

Append platform data to get spidev enumerated over it.

Cc: Dan O'Donovan <dan@emutex.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 arch/x86/platform/intel-mid/device_libs/Makefile   |  2 +
 .../intel-mid/device_libs/platform_spidev.c        | 50 ++++++++++++++++++++++
 2 files changed, 52 insertions(+)
 create mode 100644 arch/x86/platform/intel-mid/device_libs/platform_spidev.c

diff --git a/arch/x86/platform/intel-mid/device_libs/Makefile b/arch/x86/platform/intel-mid/device_libs/Makefile
index c940b15..f9c52fb 100644
--- 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
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);
-- 
2.8.1

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