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: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

5 files changed, 180 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index 52bfe4cba25c..b1df784ed702 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/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
diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
index e440c09c5576..e6e605bf1516 100644
--- a/arch/arm/mach-davinci/da850.c
+++ b/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,
diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index 1882eef3aead..094eb8ed8e76 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/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);
+}
diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h b/arch/arm/mach-davinci/include/mach/da8xx.h
index 30c5c407ea85..0af3fb6077a3 100644
--- a/arch/arm/mach-davinci/include/mach/da8xx.h
+++ b/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[]);
 
diff --git a/arch/arm/mach-davinci/include/mach/mux.h b/arch/arm/mach-davinci/include/mach/mux.h
index 82d751461856..30bf329d5373 100644
--- a/arch/arm/mach-davinci/include/mach/mux.h
+++ b/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