[RFC] ARM: shmobile: add framebuffer and backlight support to kzm9g-reference
Guennadi Liakhovetski
g.liakhovetski at gmx.de
Fri Feb 15 21:36:29 EST 2013
This adds support for the framebuffer and an AS3711 PMIC, used for supplying
power to the CPU, some peripherals and the backlight.
not-Signed-off-by: Guennadi Liakhovetski <g.liakhovetski at gmx.de>
---
As is clear from the not-Sob line and the RFC in the subject, this is not
for mainline. This is just an illustration how the recently submitted
"mfd: as3711: add OF support" patch can be used with the kzm9g board. I
had to add the framebuffer support to kzm9g, because without it the
backlight would just be turned on with no image on the LCD, which doesn't
look pretty. In the future, if needed, we could first only apply the
regulator part of the .dts, leaving the backlight disabled.
arch/arm/boot/dts/sh73a0-kzm9g-reference.dts | 90 ++++++++++++++++++++++++
arch/arm/mach-shmobile/board-kzm9g-reference.c | 73 +++++++++++++++++++-
2 files changed, 162 insertions(+), 1 deletions(-)
diff --git a/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts b/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
index b93b16a..a5810fc 100644
--- a/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
+++ b/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
@@ -99,6 +99,12 @@
toshiba,mmc-wrprotect-disable;
toshiba,mmc-has-idle-wait;
};
+
+ /* A dummy LCDC DT node for now */
+ lcdc: lcdc at 0xfe940000 {
+ compatible = "renesas,sh-mobile-lcdc";
+ reg = <0xfe940000 0x4000>;
+ };
};
&i2c3 {
@@ -106,6 +112,90 @@
pinctrl-0 = <&i2c3_pins>;
};
+&i2c0 {
+ as3711 at 40 {
+ compatible = "ams,as3711";
+ reg = <0x40>;
+
+ regulators {
+ sd1 {
+ regulator-name = "1.315V CPU";
+ regulator-min-microvolt = <1315000>;
+ regulator-max-microvolt = <1335000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+ sd2 {
+ regulator-name = "1.8V";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+ sd4 {
+ regulator-name = "1.215V";
+ regulator-min-microvolt = <1215000>;
+ regulator-max-microvolt = <1235000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+ ldo2 {
+ regulator-name = "2.8V CPU";
+ regulator-min-microvolt = <2800000>;
+ regulator-max-microvolt = <2800000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+ ldo3 {
+ regulator-name = "3.0V CPU";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <3000000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+ ldo4 {
+ regulator-name = "2.8V";
+ regulator-min-microvolt = <2800000>;
+ regulator-max-microvolt = <2800000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+ ldo5 {
+ regulator-name = "2.8V #2";
+ regulator-min-microvolt = <2800000>;
+ regulator-max-microvolt = <2800000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+ ldo7 {
+ regulator-name = "1.15V CPU";
+ regulator-min-microvolt = <1150000>;
+ regulator-max-microvolt = <1150000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+ ldo8 {
+ regulator-name = "1.15V CPU #2";
+ regulator-min-microvolt = <1150000>;
+ regulator-max-microvolt = <1150000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+ };
+
+ backlight {
+ compatible = "ams,as3711-bl";
+ su2-dev = <&lcdc>;
+ su2-max-uA = <36000>;
+ su2-feedback-curr-auto;
+ su2-fbprot-gpio4;
+ su2-auto-curr1;
+ su2-auto-curr2;
+ su2-auto-curr3;
+ };
+ };
+};
+
&gpio {
sdhi0_pins: pfc_sdhi0_pins {
renesas,pins = "sdhi0_data4", "sdhi0_ctrl", "sdhi0_wp", "sdhi0_cd";
diff --git a/arch/arm/mach-shmobile/board-kzm9g-reference.c b/arch/arm/mach-shmobile/board-kzm9g-reference.c
index 1490246..9d520ca 100644
--- a/arch/arm/mach-shmobile/board-kzm9g-reference.c
+++ b/arch/arm/mach-shmobile/board-kzm9g-reference.c
@@ -31,6 +31,7 @@
#include <linux/regulator/fixed.h>
#include <linux/regulator/machine.h>
#include <linux/smsc911x.h>
+#include <linux/videodev2.h>
#include <mach/irqs.h>
#include <mach/sh73a0.h>
@@ -39,6 +40,62 @@
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
+#include <video/sh_mobile_lcdc.h>
+
+/* LCDC */
+static struct fb_videomode kzm_lcdc_mode = {
+ .name = "WVGA Panel",
+ .xres = 800,
+ .yres = 480,
+ .left_margin = 220,
+ .right_margin = 110,
+ .hsync_len = 70,
+ .upper_margin = 20,
+ .lower_margin = 5,
+ .vsync_len = 5,
+ .sync = 0,
+};
+
+static struct sh_mobile_lcdc_info lcdc_info = {
+ .clock_source = LCDC_CLK_BUS,
+ .ch[0] = {
+ .chan = LCDC_CHAN_MAINLCD,
+ .fourcc = V4L2_PIX_FMT_RGB565,
+ .interface_type = RGB24,
+ .lcd_modes = &kzm_lcdc_mode,
+ .num_modes = 1,
+ .clock_divider = 5,
+ .flags = 0,
+ .panel_cfg = {
+ .width = 152,
+ .height = 91,
+ },
+ }
+};
+
+static struct resource lcdc_resources[] = {
+ [0] = {
+ .name = "LCDC",
+ .start = 0xfe940000,
+ .end = 0xfe943fff,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = intcs_evt2irq(0x580),
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device lcdc_device = {
+ .name = "sh_mobile_lcdc_fb",
+ .num_resources = ARRAY_SIZE(lcdc_resources),
+ .resource = lcdc_resources,
+ .dev = {
+ .platform_data = &lcdc_info,
+ .coherent_dma_mask = ~0,
+ },
+};
+
/* Dummy supplies, where voltage doesn't matter */
static struct regulator_consumer_supply dummy_supplies[] = {
REGULATOR_SUPPLY("vddvario", "smsc911x"),
@@ -79,6 +136,15 @@ static const struct pinctrl_map kzm_pinctrl_map[] = {
"scifa4_data", "scifa4"),
PIN_MAP_MUX_GROUP_DEFAULT("sh-sci.4", "e6050000.pfc",
"scifa4_ctrl", "scifa4"),
+ PIN_MAP_MUX_GROUP_DEFAULT("sh_mobile_lcdc_fb.0", "e6050000.pfc",
+ "lcd_data24", "lcd"),
+ PIN_MAP_MUX_GROUP_DEFAULT("sh_mobile_lcdc_fb.0", "e6050000.pfc",
+ "lcd_sync", "lcd"),
+};
+
+static struct platform_device *kzm_devices[] __initdata = {
+ &smsc_device,
+ &lcdc_device,
};
static void __init kzm_init(void)
@@ -88,7 +154,10 @@ static void __init kzm_init(void)
pinctrl_register_mappings(kzm_pinctrl_map, ARRAY_SIZE(kzm_pinctrl_map));
regulator_register_fixed(2, dummy_supplies, ARRAY_SIZE(dummy_supplies));
- platform_device_register(&smsc_device);
+
+ /* LCDC */
+ gpio_request_one(222, GPIOF_OUT_INIT_HIGH, NULL); /* LCDCDON */
+ gpio_request_one(226, GPIOF_OUT_INIT_HIGH, NULL); /* SC */
/*
* Enable SD: this is a pseudo-GPIO, it actually only sets bit 28 in
@@ -101,6 +170,8 @@ static void __init kzm_init(void)
/* Early BRESP enable, Shared attribute override enable, 64K*8way */
l2x0_init(IOMEM(0xf0100000), 0x40460000, 0x82000fff);
#endif
+
+ platform_add_devices(kzm_devices, ARRAY_SIZE(kzm_devices));
}
static void kzm9g_restart(char mode, const char *cmd)
--
1.7.2.5
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