arm: kirkwood: add support for ZyXEL NSA310

Hello, Andrew

> > +#define NSA310_GPIO_LED_ESATA_GREEN	12
> > <..>
> > +#define NSA310_GPIO_POWER_OFF		48
>
> It looks like most of these are not used. Please remove them.

True. Fixed.

> > +static struct mtd_partition nsa310_mtd_parts[] = {
> > +	{
> > +		.name	= "uboot",
> > +		.offset	= 0,
> > +		.size	= 0x100000,
> > +		.mask_flags = MTD_WRITEABLE,
> > +	}, {
> > <..>
> You should be able to put all that into DT. Take a look at

Correct. I did the conversion and tested that the partitions
can be read with dd and produce exactly the same data before and
after conversion. So, the partition offsets at least should be fine.

> > +static struct i2c_board_info __initdata nsa310_i2c_info[] = {
> > +	{ I2C_BOARD_INFO("adt7476", 0x2e) },
> > +};
>
> You can also do this in DT as well. kirkwood-ts219.dtsi has
>
>                 i2c@11000 {
>                         status = "okay";
>                         clock-frequency = <400000>;

Ok, I did convert the i2c definition to use the devicetree.
The adt7476 device itself is not at reach of device tree,
AFAIK and requires more work at there?

Thanks for your valuable comments. Following is a new patch that
should address the problems and mistakes you pointed and also
some of the pointed by Jason Cooper. The nand and i2c are now
defined at DT and I also removed the pointless defines and
ARM_APPENDED_DTB. It is based against the Linus' official
3.6 version.

Best regards,
Tero
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

arch/arm/boot/dts/Makefile

@@ -44,6 +44,7 @@ dtb-$(CONFIG_ARCH_KIRKWOOD) += kirkwood-dns320.dtb \
 	kirkwood-ns2lite.dtb \
 	kirkwood-ns2max.dtb \
 	kirkwood-ns2mini.dtb \
+	kirkwood-nsa310.dtb \
 	kirkwood-topkick.dtb \
 	kirkwood-ts219-6281.dtb \
 	kirkwood-ts219-6282.dtb

arch/arm/boot/dts/kirkwood-nsa310.dts

+/dts-v1/;
+
+/include/ "kirkwood.dtsi"
+
+/ {
+	model = "ZyXEL NSA310";
+	compatible = "zyxel,nsa310", "marvell,kirkwood-88f6281", "marvell,kirkwood";
+
+	memory {
+		device_type = "memory";
+		reg = <0x00000000 0x10000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200";
+	};
+
+	ocp@f1000000 {
+
+		serial@12000 {
+			clock-frequency = <200000000>;
+			status = "ok";
+		};
+
+		sata@80000 {
+			status = "okay";
+			nr-ports = <2>;
+		};
+
+		i2c@11000 {
+			status = "okay";
+		};
+
+		nand@3000000 {
+			status = "okay";
+			chip-delay = <35>;
+
+			partition@0 {
+				label = "uboot";
+				reg = <0x0000000 0x0100000>;
+				read-only;
+			};
+			partition@100000 {
+				label = "uboot_env";
+				reg = <0x0100000 0x0080000>;
+			};
+			partition@180000 {
+				label = "key_store";
+				reg = <0x0180000 0x0080000>;
+			};
+			partition@200000 {
+				label = "info";
+				reg = <0x0200000 0x0080000>;
+			};
+			partition@280000 {
+				label = "etc";
+				reg = <0x0280000 0x0a00000>;
+			};
+			partition@c80000 {
+				label = "kernel_1";
+				reg = <0x0c80000 0x0a00000>;
+			};
+			partition@1680000 {
+				label = "rootfs1";
+				reg = <0x1680000 0x2fc0000>;
+			};
+			partition@4640000 {
+				label = "kernel_2";
+				reg = <0x4640000 0x0a00000>;
+			};
+			partition@5040000 {
+				label = "rootfs2";
+				reg = <0x5040000 0x2fc0000>;
+			};
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		button@1 {
+			label = "Power Button";
+			linux,code = <116>;
+			gpios = <&gpio1 14 0>;
+		};
+		button@2 {
+			label = "Copy Button";
+			linux,code = <133>;
+			gpios = <&gpio1 5 1>;
+		};
+		button@3 {
+			label = "Reset Button";
+			linux,code = <0x198>;
+			gpios = <&gpio1 4 1>;
+		};
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		green-sys {
+			label = "nsa310:green:sys";
+			gpios = <&gpio0 28 0>;
+		};
+		red-sys {
+			label = "nsa310:red:sys";
+			gpios = <&gpio0 29 0>;
+		};
+		green-hdd {
+			label = "nsa310:green:hdd";
+			gpios = <&gpio1 9 0>;
+		};
+		red-hdd {
+			label = "nsa310:red:hdd";
+			gpios = <&gpio1 10 0>;
+		};
+		green-esata {
+			label = "nsa310:green:esata";
+			gpios = <&gpio0 12 0>;
+		};
+		red-esata {
+			label = "nsa310:red:esata";
+			gpios = <&gpio0 13 0>;
+		};
+		green-usb {
+			label = "nsa310:green:usb";
+			gpios = <&gpio0 15 0>;
+		};
+		red-usb {
+			label = "nsa310:red:usb";
+			gpios = <&gpio0 16 0>;
+		};
+		green-copy {
+			label = "nsa310:green:copy";
+			gpios = <&gpio1 7 0>;
+		};
+		red-copy {
+			label = "nsa310:red:copy";
+			gpios = <&gpio1 8 0>;
+		};
+	};
+};

arch/arm/mach-kirkwood/Kconfig

@@ -259,6 +259,14 @@ config MACH_T5325
 	  Say 'Y' here if you want your kernel to support the
 	  HP t5325 Thin Client.
 
+config MACH_NSA310_DT
+	bool "ZyXEL NSA-310 (Flattened Device Tree)"
+	select ARCH_KIRKWOOD_DT
+	select ARM_ATAG_DTB_COMPAT
+	help
+	  Say 'Y' here if you want your kernel to support the
+	  ZyXEL NSA-310 board (Flattened Device Tree).
+
 endmenu
 
 endif

arch/arm/mach-kirkwood/Makefile

@@ -36,4 +36,5 @@ obj-$(CONFIG_MACH_NETSPACE_V2_DT)	+= board-ns2.o
 obj-$(CONFIG_MACH_NETSPACE_MAX_V2_DT)	+= board-ns2.o
 obj-$(CONFIG_MACH_NETSPACE_LITE_V2_DT)	+= board-ns2.o
 obj-$(CONFIG_MACH_NETSPACE_MINI_V2_DT)	+= board-ns2.o
+obj-$(CONFIG_MACH_NSA310_DT)		+= board-nsa310.o
 obj-$(CONFIG_MACH_TOPKICK_DT)		+= board-usi_topkick.o

arch/arm/mach-kirkwood/board-dt.c

@@ -106,6 +106,9 @@ static void __init kirkwood_dt_init(void)
 	if (of_machine_is_compatible("usi,topkick"))
 		usi_topkick_init();
 
+	if (of_machine_is_compatible("zyxel,nsa310"))
+		nsa310_init();
+
 	of_platform_populate(NULL, kirkwood_dt_match_table,
 			     kirkwood_auxdata_lookup, NULL);
 }
@@ -128,6 +131,7 @@ static const char *kirkwood_dt_board_compat[] = {
 	"lacie,netspace_lite_v2",
 	"lacie,netspace_mini_v2",
 	"usi,topkick",
+	"zyxel,nsa310",
 	NULL
 };
 

arch/arm/mach-kirkwood/board-nsa310.c

+/*
+ * arch/arm/mach-kirkwood/nsa-310-setup.c
+ *
+ * ZyXEL NSA-310 Setup
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <mach/kirkwood.h>
+#include "common.h"
+#include "mpp.h"
+
+#define NSA310_GPIO_USB_POWER_OFF	21
+#define NSA310_GPIO_POWER_OFF		48
+
+static unsigned int nsa310_mpp_config[] __initdata = {
+	MPP12_GPIO, /* led esata green */
+	MPP13_GPIO, /* led esata red */
+	MPP15_GPIO, /* led usb green */
+	MPP16_GPIO, /* led usb red */
+	MPP21_GPIO, /* control usb power off */
+	MPP28_GPIO, /* led sys green */
+	MPP29_GPIO, /* led sys red */
+	MPP36_GPIO, /* key reset */
+	MPP37_GPIO, /* key copy */
+	MPP39_GPIO, /* led copy green */
+	MPP40_GPIO, /* led copy red */
+	MPP41_GPIO, /* led hdd green */
+	MPP42_GPIO, /* led hdd red */
+	MPP44_GPIO, /* ?? */
+	MPP46_GPIO, /* key power */
+	MPP48_GPIO, /* control power off */
+	0
+};
+
+static struct i2c_board_info __initdata nsa310_i2c_info[] = {
+	{ I2C_BOARD_INFO("adt7476", 0x2e) },
+};
+
+static void nsa310_power_off(void)
+{
+	gpio_set_value(NSA310_GPIO_POWER_OFF, 1);
+}
+
+static int __init nsa310_gpio_request(unsigned int gpio, unsigned long flags,
+				       const char *label)
+{
+	int err;
+
+	err = gpio_request_one(gpio, flags, label);
+	if (err)
+		pr_err("NSA-310: can't setup GPIO%u (%s), err=%d\n",
+			gpio, label, err);
+
+	return err;
+}
+
+static void __init nsa310_gpio_init(void)
+{
+	int err;
+
+	err = nsa310_gpio_request(NSA310_GPIO_POWER_OFF, GPIOF_OUT_INIT_LOW,
+				  "Power Off");
+	if (!err)
+		pm_power_off = nsa310_power_off;
+
+	nsa310_gpio_request(NSA310_GPIO_USB_POWER_OFF, GPIOF_OUT_INIT_LOW,
+			    "USB Power Off");
+}
+
+void __init nsa310_init(void)
+{
+	u32 dev, rev;
+
+	kirkwood_mpp_conf(nsa310_mpp_config);
+
+	nsa310_gpio_init();
+
+	/* this can be removed once the mainline kirkwood.dtsi gets
+	 * the ehci configuration by default */
+	kirkwood_ehci_init();
+
+	kirkwood_pcie_id(&dev, &rev);
+
+	i2c_register_board_info(0, ARRAY_AND_SIZE(nsa310_i2c_info));
+}
+
+static int __init nsa310_pci_init(void)
+{
+	if (of_machine_is_compatible("zyxel,nsa310"))
+		kirkwood_pcie_init(KW_PCIE0);
+
+	return 0;
+}
+
+subsys_initcall(nsa310_pci_init);

arch/arm/mach-kirkwood/common.h

@@ -122,6 +122,12 @@ void ns2_init(void);
 static inline void ns2_init(void) {};
 #endif
 
+#ifdef CONFIG_MACH_NSA310_DT
+void nsa310_init(void);
+#else
+static inline void nsa310_init(void) {};
+#endif
+
 #ifdef CONFIG_MACH_TOPKICK_DT
 void usi_topkick_init(void);
 #else