N900 device tree conversion: how to do first step
Pavel Machek
pavel at ucw.cz
Thu Jun 13 10:28:09 EDT 2013
On Thu 2013-06-13 07:10:01, Tony Lindgren wrote:
> * Pavel Machek <pavel at ucw.cz> [130613 06:32]:
> > Hi!
> >
> > > > I'd like to convert Nokia N900 to device tree.
> > > >
> > > > Unfortunately, serial port is not easily available (very special cable
> > > > would be needed, does someone know where to get one?) and I don't have
> > > > BDI (and very special cable would be needed, too).
> > > >
> > > > So I tried doing very small first step, hoping that I get booting
> > > > system... obviously I did not.
> > >
> > > The following works for me, it's enough to boot and get the USB networking
> > > working. After that I can connect to the device with ssh. I don't use
> > > serial either, I just have initramfs with busybox+dropbear with hardcoded
> > > interface setup.
> >
> > Nice.... thanks a lot.
> >
> > Did you get video to work with the device tree? That's what I'd like
> > to accomplish now.
>
> The DSS code is still using pdata, see mach-omap2/dss-common.[ch].
>
> > If I init spi manually (and some more hacks), it works in the
> > qemu. But I have not tested on real hw for a while.
>
> You should be able to initialize spi by adding the .dts entry,
> or is there something missing in drivers/spi/spi-omap2-mcspi.c?
Not sure, I guess I'll find out soon. Do you have example dts that
uses drivers/spi/spi-omap2-mcspi.c? Grepping spi in dts/ was not too
successful.
This is what I'm doing currently...
Thanks,
Pavel
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 9c62558..7b1a075 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -119,6 +119,7 @@ dtb-$(CONFIG_ARCH_OMAP2PLUS) += omap2420-h4.dtb \
omap3-beagle-xm.dtb \
omap3-evm.dtb \
omap3-tobi.dtb \
+ omap3-n900.dtb \
omap4-panda.dtb \
omap4-panda-a4.dtb \
omap4-panda-es.dtb \
diff --git a/arch/arm/boot/dts/omap3-n900.dts b/arch/arm/boot/dts/omap3-n900.dts
new file mode 100644
index 0000000..10a880f
--- /dev/null
+++ b/arch/arm/boot/dts/omap3-n900.dts
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2013 Pavel Machek <pavel at ucw.cz>
+ * Copyright 2013 Aaro Koskinen <aaro.koskinen at iki.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 (or later) as
+ * published by the Free Software Foundation.
+ */
+
+/dts-v1/;
+
+/include/ "omap34xx.dtsi"
+
+/ {
+ model = "Nokia N900";
+ compatible = "nokia,omap3-n900", "ti,omap3";
+
+ cpus {
+ cpu at 0 {
+// cpu0-supply = <&vcc>;
+ };
+ };
+
+ memory {
+ device_type = "memory";
+ reg = <0x80000000 0x10000000>; /* 256 MB */
+ };
+
+};
+
+&i2c1 {
+ clock-frequency = <2200000>;
+
+ twl: twl at 48 {
+ reg = <0x48>;
+ interrupts = <7>; /* SYS_NIRQ cascaded to intc */
+ interrupt-parent = <&intc>;
+ };
+};
+
+/include/ "twl4030.dtsi"
+
+&twl_gpio {
+ ti,pullups = <0x0>;
+ ti,pulldowns = <0x03ff3f>; /* BIT(0..5) | BIT(8..17) */
+};
+
+&i2c2 {
+ clock-frequency = <400000>;
+};
+
+&i2c3 {
+ clock-frequency = <100000>;
+};
+
+&mmc1 {
+ status = "disabled";
+};
+
+&mmc2 {
+ status = "disabled";
+};
+
+&mmc3 {
+ status = "disabled";
+};
+
+/*
+&usb_otg_hs {
+ interface-type = <0>;
+ usb-phy = <&usb2_phy>;
+ mode = <2>;
+ power = <50>;
+};
+*/
diff --git a/arch/arm/boot/dts/omap34xx.dtsi b/arch/arm/boot/dts/omap34xx.dtsi
new file mode 100644
index 0000000..75ed4ae
--- /dev/null
+++ b/arch/arm/boot/dts/omap34xx.dtsi
@@ -0,0 +1,28 @@
+/*
+ * Device Tree Source for OMAP34xx/OMAP35xx SoC
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * 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/ "omap3.dtsi"
+
+/ {
+ cpus {
+ cpu at 0 {
+ /* OMAP343x/OMAP35xx variants OPP1-5 */
+ operating-points = <
+ /* kHz uV */
+ 125000 975000
+ 250000 1075000
+ 500000 1200000
+ 550000 1270000
+ 600000 1350000
+ >;
+ clock-latency = <300000>; /* From legacy driver */
+ };
+ };
+};
diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c
index e54a480..996ffc3 100644
--- a/arch/arm/mach-omap2/board-generic.c
+++ b/arch/arm/mach-omap2/board-generic.c
@@ -22,6 +22,12 @@
#include "common-board-devices.h"
#include "dss-common.h"
+#include "mux.h"
+#include <linux/spi/spi.h>
+#include <linux/platform_data/spi-omap2-mcspi.h>
+#include <linux/platform_data/mtd-onenand-omap2.h>
+#include <linux/regulator/machine.h>
+
#if !(defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3))
#define intc_of_init NULL
#endif
@@ -35,20 +41,105 @@ static struct of_device_id omap_dt_match_table[] __initdata = {
{ }
};
-static void __init omap_generic_init(void)
+#if 1
+
+/* list all spi devices here */
+enum {
+ RX51_SPI_MIPID, /* LCD panel */
+ RX51_SPI_WL1251,
+ RX51_SPI_TSC2005, /* Touch Controller */
+};
+
+static struct omap2_mcspi_device_config wl1251_mcspi_config = {
+ .turbo_mode = 0,
+};
+
+static struct omap2_mcspi_device_config mipid_mcspi_config = {
+ .turbo_mode = 0,
+};
+
+static struct omap2_mcspi_device_config tsc2005_mcspi_config = {
+ .turbo_mode = 0,
+};
+
+#if 0
+static struct wl12xx_platform_data wl1251_pdata;
+static struct tsc2005_platform_data tsc2005_pdata;
+#endif
+
+static struct spi_board_info rx51_peripherals_spi_board_info[] __initdata = {
+#if 0
+ /* Wireless */
+ [RX51_SPI_WL1251] = {
+ .modalias = "wl1251",
+ .bus_num = 4,
+ .chip_select = 0,
+ .max_speed_hz = 48000000,
+ .mode = SPI_MODE_3,
+ .controller_data = &wl1251_mcspi_config,
+ .platform_data = &wl1251_pdata,
+ },
+#endif
+ [RX51_SPI_MIPID] = {
+ .modalias = "acx565akm",
+ .bus_num = 1,
+ .chip_select = 2,
+ .max_speed_hz = 6000000,
+ .controller_data = &mipid_mcspi_config,
+ },
+#if 0
+ /* Touchscreen */
+ [RX51_SPI_TSC2005] = {
+ .modalias = "tsc2005",
+ .bus_num = 1,
+ .chip_select = 0,
+ .max_speed_hz = 6000000,
+ .controller_data = &tsc2005_mcspi_config,
+ .platform_data = &tsc2005_pdata,
+ },
+#endif
+};
+
+static struct omap_board_mux board_mux[] __initdata = {
+ { .reg_offset = OMAP_MUX_TERMINATOR },
+};
+#endif
+
+extern int rx51_video_init(void);
+
+void __init omap_generic_init(void)
{
omap_sdrc_init(NULL, NULL);
-
of_platform_populate(NULL, omap_dt_match_table, NULL, NULL);
/*
* HACK: call display setup code for selected boards to enable omapdss.
* This will be removed when omapdss supports DT.
*/
- if (of_machine_is_compatible("ti,omap4-panda"))
+ if (of_machine_is_compatible("ti,omap4-panda")) {
omap4_panda_display_init_of();
- else if (of_machine_is_compatible("ti,omap4-sdp"))
+ return;
+ }
+ if (of_machine_is_compatible("ti,omap4-sdp")) {
omap_4430sdp_display_init_of();
+ return;
+ }
+#ifdef CONFIG_MACH_NOKIA_RX51
+ if (of_machine_is_compatible("nokia,omap3-n900")) {
+#if 1
+ regulator_use_dummy_regulator();
+
+ omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
+
+ spi_register_board_info(rx51_peripherals_spi_board_info,
+ ARRAY_SIZE(rx51_peripherals_spi_board_info));
+#else
+ rx51_video_init();
+#endif
+ return;
+ }
+ panic("really want to init video\n");
+#endif
}
#ifdef CONFIG_SOC_OMAP2420
diff --git a/arch/arm/mach-omap2/board-rx51-video.c b/arch/arm/mach-omap2/board-rx51-video.c
index eb66726..022bff0 100644
--- a/arch/arm/mach-omap2/board-rx51-video.c
+++ b/arch/arm/mach-omap2/board-rx51-video.c
@@ -68,7 +68,7 @@ static struct omap_dss_board_info rx51_dss_board_info = {
static int __init rx51_video_init(void)
{
- if (!machine_is_nokia_rx51())
+ if (!of_machine_is_compatible("nokia,omap3-n900"))
return 0;
if (omap_mux_init_gpio(RX51_LCD_RESET_GPIO, OMAP_PIN_OUTPUT)) {
diff --git a/arch/arm/mach-omap2/board-rx51.c b/arch/arm/mach-omap2/board-rx51.c
index 74f83a5..ee001e2 100644
--- a/arch/arm/mach-omap2/board-rx51.c
+++ b/arch/arm/mach-omap2/board-rx51.c
@@ -36,6 +36,8 @@
#define RX51_GPIO_SLEEP_IND 162
+/* This lights up left part of keyboard */
+
static struct gpio_led gpio_leds[] = {
{
.name = "sleep_ind",
@@ -91,49 +93,69 @@ static struct omap_musb_board_data musb_board_data = {
.power = 0,
};
-static void __init rx51_init(void)
+void rx51_init_base(void)
{
struct omap_sdrc_params *sdrc_params;
-
omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
- omap_serial_init();
+#if 0
sdrc_params = nokia_get_sdram_timings();
omap_sdrc_init(sdrc_params, sdrc_params);
+#endif
+}
+
+void __init rx51_init(void)
+{
+ printk("rx_init: n900 starting\n");
+
+ rx51_init_base();
+#if 0
+ omap_serial_init();
usb_bind_phy("musb-hdrc.0.auto", 0, "twl4030_usb");
usb_musb_init(&musb_board_data);
+#endif
rx51_peripherals_init();
- rx51_camera_init();
+// rx51_camera_init();
+#if 0
#ifdef CONFIG_ARM_ERRATA_430973
printk(KERN_INFO "RX-51: Enabling ARM errata 430973 workaround.\n");
/* set IBE to 1 */
rx51_secure_update_aux_cr(1 << 6, 0);
#endif
+#endif
+ /* FIXME: keep those? */
/* Ensure SDRC pins are mux'd for self-refresh */
- omap_mux_init_signal("sdrc_cke0", OMAP_PIN_OUTPUT);
- omap_mux_init_signal("sdrc_cke1", OMAP_PIN_OUTPUT);
+// omap_mux_init_signal("sdrc_cke0", OMAP_PIN_OUTPUT);
+// omap_mux_init_signal("sdrc_cke1", OMAP_PIN_OUTPUT);
- platform_device_register(&leds_gpio);
+// platform_device_register(&leds_gpio);
}
-static void __init rx51_reserve(void)
-{
- omap_reserve();
-}
+static const char *omap3_boards_compat[] __initdata = {
+ "nokia,omap3-n900",
+ NULL,
+};
+
-MACHINE_START(NOKIA_RX51, "Nokia RX-51 board")
- /* Maintainer: Lauri Leukkunen <lauri.leukkunen at nokia.com> */
- .atag_offset = 0x100,
- .reserve = rx51_reserve,
+extern void __init omap_generic_init(void);
+
+DT_MACHINE_START(NOKIA_RX51_DT, "Nokia N900 (Flattened Device Tree)")
+ .reserve = omap_reserve,
.map_io = omap3_map_io,
- .init_early = omap3430_init_early,
- .init_irq = omap3_init_irq,
- .handle_irq = omap3_intc_handle_irq,
- .init_machine = rx51_init,
- .init_late = omap3430_init_late,
- .init_time = omap3_sync32k_timer_init,
- .restart = omap3xxx_restart,
+ .init_early = omap3430_init_early,
+ .init_irq = omap_intc_of_init,
+ .handle_irq = omap3_intc_handle_irq,
+ .init_machine =
+#if 0
+ rx51_init,
+#else
+ omap_generic_init,
+#endif
+ .init_late = omap3_init_late,
+ .init_time = omap3_sync32k_timer_init,
+ .dt_compat = omap3_boards_compat,
+ .restart = omap3xxx_restart,
MACHINE_END
diff --git a/arch/arm/mach-omap2/devices.c b/arch/arm/mach-omap2/devices.c
index 0b6260a1..e300c18 100644
--- a/arch/arm/mach-omap2/devices.c
+++ b/arch/arm/mach-omap2/devices.c
@@ -764,7 +764,7 @@ static inline void omap_init_ocp2scp(void) { }
static int __init omap2_init_devices(void)
{
/* Enable dummy states for those platforms without pinctrl support */
- if (!of_have_populated_dt())
+ if (1) /* FIXME */
pinctrl_provide_dummies();
/*
diff --git a/sound/soc/omap/rx51.c b/sound/soc/omap/rx51.c
index e4842c3..026de91 100644
--- a/sound/soc/omap/rx51.c
+++ b/sound/soc/omap/rx51.c
@@ -396,8 +396,10 @@ static int rx51_soc_probe(struct platform_device *pdev)
struct snd_soc_card *card = &rx51_sound_card;
int err;
- if (!machine_is_nokia_rx51())
+ if (!of_machine_is_compatible("nokia,omap3-n900")) {
+ printk("FIXME: rx51_soc_probe on non-nokia\n");
return -ENODEV;
+ }
err = gpio_request_one(RX51_TVOUT_SEL_GPIO,
GPIOF_DIR_OUT | GPIOF_INIT_LOW, "tvout_sel");
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
More information about the linux-arm-kernel
mailing list