From 14d95026b2968d1ac7df2198995079ba2d0fb9af Mon Sep 17 00:00:00 2001
From: Gabor Juhos <juhosg@openwrt.org>
Date: Sun, 23 Feb 2014 08:11:52 +0000
Subject: [PATCH] ar71xx: rb91x: add SPI device for the serial shift register

The RB91x boards are using a serial shift register
connected to the SPI bus to drive some of the LEDs.

Rework the board setup code to register a SPI device
for that. This makes it possible to use the 'spi-74x164'
driver to control the device.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 39703
---
 .../ar71xx/files/arch/mips/ath79/mach-rb91x.c | 64 ++++++++++++++++++-
 .../703-MIPS-ath79-add-RB91x-support.patch    |  2 +-
 2 files changed, 63 insertions(+), 3 deletions(-)

diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-rb91x.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-rb91x.c
index cb9abf7627..0dc2e0fcc0 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-rb91x.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-rb91x.c
@@ -33,9 +33,9 @@
 #include "common.h"
 #include "dev-eth.h"
 #include "dev-leds-gpio.h"
-#include "dev-m25p80.h"
 #include "dev-nfc.h"
 #include "dev-usb.h"
+#include "dev-spi.h"
 #include "dev-wmac.h"
 #include "machtypes.h"
 #include "pci.h"
@@ -55,6 +55,19 @@
 #define RB91X_LATCH_GPIO_BASE	AR934X_GPIO_COUNT
 #define RB91X_LATCH_GPIO(_x)	(RB91X_LATCH_GPIO_BASE + (_x))
 
+#define RB91X_SSR_GPIO_BASE	(RB91X_LATCH_GPIO_BASE + AR934X_GPIO_COUNT)
+#define RB91X_SSR_GPIO(_x)	(RB91X_SSR_GPIO_BASE + (_x))
+
+#define RB91X_SSR_BIT_LED1		0
+#define RB91X_SSR_BIT_LED2		1
+#define RB91X_SSR_BIT_LED3		2
+#define RB91X_SSR_BIT_LED4		3
+#define RB91X_SSR_BIT_LED5		4
+#define RB91X_SSR_BIT_5			5
+#define RB91X_SSR_BIT_USB_POWER		6
+#define RB91X_SSR_BIT_PCIE_POWER	7
+
+#define RB91X_GPIO_SSR_STROBE	RB91X_LATCH_GPIO(0)
 #define RB91X_GPIO_NAND_READ	RB91X_LATCH_GPIO(3)
 #define RB91X_GPIO_NAND_RDY	RB91X_LATCH_GPIO(4)
 #define RB91X_GPIO_NLE		RB91X_LATCH_GPIO(11)
@@ -116,6 +129,52 @@ static struct rb91x_nand_platform_data rb711gr100_nand_data __initdata = {
 	.gpio_nle = RB91X_GPIO_NLE,
 };
 
+static u8 rb711gr100_ssr_initdata[] __initdata = {
+	BIT(RB91X_SSR_BIT_PCIE_POWER) |
+	BIT(RB91X_SSR_BIT_USB_POWER) |
+	BIT(RB91X_SSR_BIT_5)
+};
+
+static struct gen_74x164_chip_platform_data rb711gr100_ssr_data = {
+	.base = RB91X_SSR_GPIO_BASE,
+	.num_registers = ARRAY_SIZE(rb711gr100_ssr_initdata),
+	.init_data = rb711gr100_ssr_initdata,
+};
+
+static struct ath79_spi_controller_data rb711gr100_spi0_cdata = {
+	.cs_type = ATH79_SPI_CS_TYPE_INTERNAL,
+	.cs_line = 0,
+	.is_flash = true,
+};
+
+static struct ath79_spi_controller_data rb711gr100_spi1_cdata = {
+	.cs_type = ATH79_SPI_CS_TYPE_GPIO,
+	.cs_line = RB91X_GPIO_SSR_STROBE,
+};
+
+static struct spi_board_info rb711gr100_spi_info[] = {
+	{
+		.bus_num	= 0,
+		.chip_select	= 0,
+		.max_speed_hz	= 25000000,
+		.modalias	= "m25p80",
+		.platform_data  = &rb711gr100_spi_flash_data,
+		.controller_data = &rb711gr100_spi0_cdata
+	}, {
+		.bus_num	= 0,
+		.chip_select	= 1,
+		.max_speed_hz	= 10000000,
+		.modalias	= "74x164",
+		.platform_data	= &rb711gr100_ssr_data,
+		.controller_data = &rb711gr100_spi1_cdata
+	}
+};
+
+static struct ath79_spi_platform_data rb711gr100_spi_data __initdata = {
+	.bus_num = 0,
+	.num_chipselect = 2,
+};
+
 static void __init rb711gr100_init_partitions(const struct rb_info *info)
 {
 	rb711gr100_spi_partitions[0].size = info->hard_cfg_offs;
@@ -182,7 +241,8 @@ static void __init rb711gr100_setup(void)
 	mips_set_machine_name(buf);
 
 	rb711gr100_init_partitions(info);
-	ath79_register_m25p80(&rb711gr100_spi_flash_data);
+	ath79_register_spi(&rb711gr100_spi_data, rb711gr100_spi_info,
+			   ARRAY_SIZE(rb711gr100_spi_info));
 
 	ath79_setup_ar934x_eth_cfg(AR934X_ETH_CFG_RGMII_GMAC0 |
 				   AR934X_ETH_CFG_SW_ONLY_MODE);
diff --git a/target/linux/ar71xx/patches-3.10/703-MIPS-ath79-add-RB91x-support.patch b/target/linux/ar71xx/patches-3.10/703-MIPS-ath79-add-RB91x-support.patch
index 59679a2722..62204a8eee 100644
--- a/target/linux/ar71xx/patches-3.10/703-MIPS-ath79-add-RB91x-support.patch
+++ b/target/linux/ar71xx/patches-3.10/703-MIPS-ath79-add-RB91x-support.patch
@@ -18,7 +18,7 @@
 +	bool "MikroTik RouterBOARD 91X support"
 +	select SOC_AR934X
 +	select ATH79_DEV_ETH
-+	select ATH79_DEV_M25P80
++	select ATH79_DEV_SPI
 +	select ATH79_DEV_WMAC
 +	select ATH79_DEV_USB
 +	select ATH79_ROUTERBOOT
-- 
2.25.1