PKGBUILDs/core/linux-mmp/0003-arch-arm-mmp-Adding-spi-master-and-mtd-dataflash-for.patch

From b4db6ab77256a6761670e45fa4738fc775063d2e Mon Sep 17 00:00:00 2001
From: Ashokkumar G <0xfee1dead.sa@gmail.com>
Date: Mon, 27 Jan 2014 09:47:06 -0700
Subject: [PATCH 3/8] arch:arm:mmp: Adding spi master and mtd dataflash for
 gplugd

1. Adding SPI master for gplugd
2. Adding atmel mtd dataflash on SPI for gplugd
---
 arch/arm/mach-mmp/gplugd.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/arch/arm/mach-mmp/gplugd.c b/arch/arm/mach-mmp/gplugd.c
index 83a7019..9c441e1 100644
--- a/arch/arm/mach-mmp/gplugd.c
+++ b/arch/arm/mach-mmp/gplugd.c
@@ -12,6 +12,8 @@
 #include <linux/platform_device.h>
 #include <linux/gpio.h>
 #include <linux/gpio-pxa.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/pxa2xx_spi.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach-types.h>
@@ -185,6 +187,46 @@ static void __init select_disp_freq(void)
 	}
 }
 
+static struct pxa2xx_spi_master pxa_ssp_master_info = {
+	.num_chipselect	= 1,
+	.enable_dma = 1,
+};
+
+static struct pxa2xx_spi_chip AT45DB041D_spi_info = {
+	.tx_threshold = 1,
+	.rx_threshold = 1,
+	.timeout = 1000,
+	.gpio_cs = 110
+};
+
+static struct spi_board_info __initdata gplugD_spi_board_info[] = {
+	{
+		.modalias = "mtd_dataflash",
+		.mode = SPI_MODE_0,
+		.max_speed_hz = 260000,
+		.bus_num = 2,
+		.chip_select = 0,
+		.platform_data = NULL,
+		.controller_data = &AT45DB041D_spi_info,
+		.irq = -1,
+	},
+};
+
+static inline int pxa168_add_spi(int id, struct pxa2xx_spi_master *pdata)
+{
+	struct platform_device *pd;
+
+	pd = platform_device_alloc("pxa2xx-spi", id);
+	if (pd == NULL) {
+		pr_err("pxa2xx-spi: failed to allocate device (id=%d)\n", id);
+		return -ENOMEM;
+	}
+
+	platform_device_add_data(pd, pdata, sizeof(*pdata));
+
+	return platform_device_add(pd);
+}
+
 static void __init gplugd_init(void)
 {
 	mfp_config(ARRAY_AND_SIZE(gplugd_pin_config));
@@ -196,11 +238,17 @@ static void __init gplugd_init(void)
 
 	/* on-chip devices */
 	pxa168_add_uart(3);
+
 	pxa168_add_ssp(1);
 
 	pxa168_add_twsi(0, &i2c_info, ARRAY_AND_SIZE(gplugd_i2c_board_info));
 
 	pxa168_add_eth(&gplugd_eth_platform_data);
+
+	pxa168_add_ssp(2);
+
+	pxa168_add_spi(2, &pxa_ssp_master_info);
+	spi_register_board_info(gplugD_spi_board_info, ARRAY_SIZE(gplugD_spi_board_info));
 }
 
 MACHINE_START(GPLUGD, "PXA168-based GuruPlug Display (gplugD) Platform")
-- 
2.8.0