davinci: Add platform support for da850/omap-l138 GLCD

This patch adds platform support for the graphic display
(Sharp LK043T1DG01) found on DA850/OMAP-L138 based EVM.
Signed-off-by: NSudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>

arch/arm/mach-davinci/board-da850-evm.c

@@ -17,6 +17,7 @@
 #include <linux/console.h>
 #include <linux/i2c.h>
 #include <linux/i2c/at24.h>
+#include <linux/gpio.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -29,6 +30,9 @@
 #define DA850_EVM_PHY_MASK		0x1
 #define DA850_EVM_MDIO_FREQUENCY	2200000 /* PHY bus frequency */
 
+#define DA850_LCD_BL_PIN		GPIO_TO_PIN(2, 15)
+#define DA850_LCD_PWR_PIN		GPIO_TO_PIN(8, 10)
+
 static struct davinci_i2c_platform_data da850_evm_i2c_0_pdata = {
 	.bus_freq	= 100,	/* kHz */
 	.bus_delay	= 0,	/* usec */
@@ -59,6 +63,37 @@ static struct snd_platform_data da850_evm_snd_data = {
 	.rxnumevt	= 1,
 };
 
+static int da850_lcd_hw_init(void)
+{
+	int status;
+
+	status = gpio_request(DA850_LCD_BL_PIN, "lcd bl\n");
+	if (status < 0)
+		return status;
+
+	status = gpio_request(DA850_LCD_PWR_PIN, "lcd pwr\n");
+	if (status < 0) {
+		gpio_free(DA850_LCD_BL_PIN);
+		return status;
+	}
+
+	gpio_direction_output(DA850_LCD_BL_PIN, 0);
+	gpio_direction_output(DA850_LCD_PWR_PIN, 0);
+
+	/* disable lcd backlight */
+	gpio_set_value(DA850_LCD_BL_PIN, 0);
+
+	/* disable lcd power */
+	gpio_set_value(DA850_LCD_PWR_PIN, 0);
+
+	/* enable lcd power */
+	gpio_set_value(DA850_LCD_PWR_PIN, 1);
+
+	/* enable lcd backlight */
+	gpio_set_value(DA850_LCD_BL_PIN, 1);
+
+	return 0;
+}
 
 static __init void da850_evm_init(void)
 {
@@ -115,6 +150,21 @@ static __init void da850_evm_init(void)
 				ret);
 
 	da8xx_init_mcasp(0, &da850_evm_snd_data);
+
+	ret = da8xx_pinmux_setup(da850_lcdcntl_pins);
+	if (ret)
+		pr_warning("da850_evm_init: lcdcntl mux setup failed: %d\n",
+				ret);
+
+	ret = da850_lcd_hw_init();
+	if (ret)
+		pr_warning("da850_evm_init: lcd initialization failed: %d\n",
+				ret);
+
+	ret = da8xx_register_lcdc();
+	if (ret)
+		pr_warning("da850_evm_init: lcdc registration failed: %d\n",
+				ret);
 }
 
 #ifdef CONFIG_SERIAL_8250_CONSOLE

arch/arm/mach-davinci/da850.c

@@ -297,6 +297,13 @@ static struct clk mcasp_clk = {
 	.psc_ctlr	= 1,
 };
 
+static struct clk lcdc_clk = {
+	.name		= "lcdc",
+	.parent		= &pll0_sysclk2,
+	.lpsc		= DA8XX_LPSC1_LCDC,
+	.psc_ctlr	= 1,
+};
+
 static struct davinci_clk da850_clks[] = {
 	CLK(NULL,		"ref",		&ref_clk),
 	CLK(NULL,		"pll0",		&pll0_clk),
@@ -335,6 +342,7 @@ static struct davinci_clk da850_clks[] = {
 	CLK(NULL,		"rmii",		&rmii_clk),
 	CLK("davinci_emac.1",	NULL,		&emac_clk),
 	CLK("davinci-mcasp.0",	NULL,		&mcasp_clk),
+	CLK("da8xx_lcdc.0",	NULL,		&lcdc_clk),
 	CLK(NULL,		NULL,		NULL),
 };
 
@@ -405,6 +413,30 @@ static const struct mux_config da850_pins[] = {
 	MUX_CFG(DA850,	AXR_2,		2,	20,	15,	1,	false)
 	MUX_CFG(DA850,	AXR_1,		2,	24,	15,	1,	false)
 	MUX_CFG(DA850,	AXR_0,		2,	28,	15,	1,	false)
+	/* LCD function */
+	MUX_CFG(DA850, LCD_D_7,		16,	8,	15,	2,	false)
+	MUX_CFG(DA850, LCD_D_6,		16,	12,	15,	2,	false)
+	MUX_CFG(DA850, LCD_D_5,		16,	16,	15,	2,	false)
+	MUX_CFG(DA850, LCD_D_4,		16,	20,	15,	2,	false)
+	MUX_CFG(DA850, LCD_D_3,		16,	24,	15,	2,	false)
+	MUX_CFG(DA850, LCD_D_2,		16,	28,	15,	2,	false)
+	MUX_CFG(DA850, LCD_D_1,		17,	0,	15,	2,	false)
+	MUX_CFG(DA850, LCD_D_0,		17,	4,	15,	2,	false)
+	MUX_CFG(DA850, LCD_D_15,	17,	8,	15,	2,	false)
+	MUX_CFG(DA850, LCD_D_14,	17,	12,	15,	2,	false)
+	MUX_CFG(DA850, LCD_D_13,	17,	16,	15,	2,	false)
+	MUX_CFG(DA850, LCD_D_12,	17,	20,	15,	2,	false)
+	MUX_CFG(DA850, LCD_D_11,	17,	24,	15,	2,	false)
+	MUX_CFG(DA850, LCD_D_10,	17,	28,	15,	2,	false)
+	MUX_CFG(DA850, LCD_D_9,		18,	0,	15,	2,	false)
+	MUX_CFG(DA850, LCD_D_8,		18,	4,	15,	2,	false)
+	MUX_CFG(DA850, LCD_PCLK,	18,	24,	15,	2,	false)
+	MUX_CFG(DA850, LCD_HSYNC,	19,	0,	15,	2,	false)
+	MUX_CFG(DA850, LCD_VSYNC,	19,	4,	15,	2,	false)
+	MUX_CFG(DA850, NLCD_AC_ENB_CS,	19,	24,	15,	2,	false)
+	/* GPIO function */
+	MUX_CFG(DA850, GPIO2_15,	5,	0,	15,	8,	false)
+	MUX_CFG(DA850, GPIO8_10,	18,	28,	15,	8,	false)
 #endif
 };
 
@@ -449,6 +481,16 @@ const short da850_mcasp_pins[] __initdata = {
 	-1
 };
 
+const short da850_lcdcntl_pins[] __initdata = {
+	DA850_LCD_D_1, DA850_LCD_D_2, DA850_LCD_D_3, DA850_LCD_D_4,
+	DA850_LCD_D_5, DA850_LCD_D_6, DA850_LCD_D_7, DA850_LCD_D_8,
+	DA850_LCD_D_9, DA850_LCD_D_10, DA850_LCD_D_11, DA850_LCD_D_12,
+	DA850_LCD_D_13, DA850_LCD_D_14, DA850_LCD_D_15, DA850_LCD_PCLK,
+	DA850_LCD_HSYNC, DA850_LCD_VSYNC, DA850_NLCD_AC_ENB_CS, DA850_GPIO2_15,
+	DA850_GPIO8_10,
+	-1
+};
+
 /* FIQ are pri 0-1; otherwise 2-7, with 7 lowest priority */
 static u8 da850_default_priorities[DA850_N_CP_INTC_IRQ] = {
 	[IRQ_DA8XX_COMMTX]		= 7,

arch/arm/mach-davinci/devices-da8xx.c

@@ -21,6 +21,7 @@
 #include <mach/common.h>
 #include <mach/time.h>
 #include <mach/da8xx.h>
+#include <video/da8xx-fb.h>
 
 #include "clock.h"
 
@@ -353,3 +354,61 @@ void __init da8xx_init_mcasp(int id, struct snd_platform_data *pdata)
 		platform_device_register(&da850_mcasp_device);
 	}
 }
+
+static const struct display_panel disp_panel = {
+	QVGA,
+	16,
+	16,
+	COLOR_ACTIVE,
+};
+
+static struct lcd_ctrl_config lcd_cfg = {
+	&disp_panel,
+	.ac_bias		= 255,
+	.ac_bias_intrpt		= 0,
+	.dma_burst_sz		= 16,
+	.bpp			= 16,
+	.fdd			= 255,
+	.tft_alt_mode		= 0,
+	.stn_565_mode		= 0,
+	.mono_8bit_mode		= 0,
+	.invert_line_clock	= 1,
+	.invert_frm_clock	= 1,
+	.sync_edge		= 0,
+	.sync_ctrl		= 1,
+	.raster_order		= 0,
+};
+
+static struct da8xx_lcdc_platform_data da850_evm_lcdc_pdata = {
+	.manu_name = "sharp",
+	.controller_data = &lcd_cfg,
+	.type = "Sharp_LK043T1DG01",
+};
+
+static struct resource da8xx_lcdc_resources[] = {
+	[0] = { /* registers */
+		.start  = DA8XX_LCD_CNTRL_BASE,
+		.end    = DA8XX_LCD_CNTRL_BASE + SZ_4K - 1,
+		.flags  = IORESOURCE_MEM,
+	},
+	[1] = { /* interrupt */
+		.start  = IRQ_DA8XX_LCDINT,
+		.end    = IRQ_DA8XX_LCDINT,
+		.flags  = IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device da850_lcdc_device = {
+	.name		= "da8xx_lcdc",
+	.id		= 0,
+	.num_resources	= ARRAY_SIZE(da8xx_lcdc_resources),
+	.resource	= da8xx_lcdc_resources,
+	.dev = {
+		.platform_data = &da850_evm_lcdc_pdata,
+	}
+};
+
+int __init da8xx_register_lcdc(void)
+{
+	return platform_device_register(&da850_lcdc_device);
+}

arch/arm/mach-davinci/include/mach/da8xx.h

@@ -37,6 +37,7 @@
 #define DA8XX_TIMER64P1_BASE	0x01c21000
 #define DA8XX_GPIO_BASE		0x01e26000
 #define DA8XX_PSC1_BASE		0x01e27000
+#define DA8XX_LCD_CNTRL_BASE	0x01e13000
 
 #define PINMUX0			0x00
 #define PINMUX1			0x04
@@ -66,6 +67,7 @@ int da8xx_register_edma(void);
 int da8xx_register_i2c(int instance, struct davinci_i2c_platform_data *pdata);
 int da8xx_register_watchdog(void);
 int da8xx_register_emac(void);
+int da8xx_register_lcdc(void);
 void __init da8xx_init_mcasp(int id, struct snd_platform_data *pdata);
 
 extern struct platform_device da8xx_serial_device;
@@ -103,6 +105,7 @@ extern const short da850_i2c0_pins[];
 extern const short da850_i2c1_pins[];
 extern const short da850_cpgmac_pins[];
 extern const short da850_mcasp_pins[];
+extern const short da850_lcdcntl_pins[];
 
 int da8xx_pinmux_setup(const short pins[]);
 

arch/arm/mach-davinci/include/mach/mux.h

@@ -775,6 +775,32 @@ enum davinci_da850_index {
 	DA850_AXR_2,
 	DA850_AXR_1,
 	DA850_AXR_0,
+
+	/* LCD function */
+	DA850_LCD_D_7,
+	DA850_LCD_D_6,
+	DA850_LCD_D_5,
+	DA850_LCD_D_4,
+	DA850_LCD_D_3,
+	DA850_LCD_D_2,
+	DA850_LCD_D_1,
+	DA850_LCD_D_0,
+	DA850_LCD_D_15,
+	DA850_LCD_D_14,
+	DA850_LCD_D_13,
+	DA850_LCD_D_12,
+	DA850_LCD_D_11,
+	DA850_LCD_D_10,
+	DA850_LCD_D_9,
+	DA850_LCD_D_8,
+	DA850_LCD_PCLK,
+	DA850_LCD_HSYNC,
+	DA850_LCD_VSYNC,
+	DA850_NLCD_AC_ENB_CS,
+
+	/* GPIO function */
+	DA850_GPIO2_15,
+	DA850_GPIO8_10,
 };
 
 #ifdef CONFIG_DAVINCI_MUX