Sudhakar,
On Wed, Aug 12, 2009 at 03:28:02, Rajashekhara, Sudhakar wrote:
> This patch adds platform support for the graphic display
> (Sharp LK043T1DG01) found on DA850/OMAP-L138 based EVM.
>
> Signed-off-by: Sudhakar Rajashekhara <[email protected]>
> ---
> arch/arm/mach-davinci/board-da850-evm.c | 71
> ++++++++++++++++++++++++++++
> arch/arm/mach-davinci/da850.c | 42 ++++++++++++++++
> arch/arm/mach-davinci/devices-da8xx.c | 59 +++++++++++++++++++++++
> arch/arm/mach-davinci/include/mach/da8xx.h | 3 +
> arch/arm/mach-davinci/include/mach/mux.h | 26 ++++++++++
> 5 files changed, 201 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-davinci/board-da850-evm.c
> b/arch/arm/mach-davinci/board-da850-evm.c
> index d989346..45575e5 100644
> --- a/arch/arm/mach-davinci/board-da850-evm.c
> +++ b/arch/arm/mach-davinci/board-da850-evm.c
> @@ -17,6 +17,8 @@
> #include <linux/console.h>
> #include <linux/i2c.h>
> #include <linux/i2c/at24.h>
> +#include <linux/gpio.h>
> +#include <linux/delay.h>
>
> #include <asm/mach-types.h>
> #include <asm/mach/arch.h>
> @@ -25,6 +27,7 @@
> #include <mach/irqs.h>
> #include <mach/cp_intc.h>
> #include <mach/da8xx.h>
> +#include <mach/psc.h>
>
> #define DA850_EVM_PHY_MASK 0x1
> #define DA850_EVM_MDIO_FREQUENCY 2200000 /* PHY bus frequency */
> @@ -38,6 +41,59 @@ static struct davinci_uart_config da850_evm_uart_config
> __initdata = {
> .enabled_uarts = 0x7,
> };
>
> +int da850_lcd_hw_init(void)
This should be static?
> +{
> + /* GPIO 2[15] is used for LCD back light - 16 * 2 + 15 = 47 */
> + int bl_gpio_num = 47;
> +
> + /* GPIO 8[10] is used for LCD power - 16 * 8 + 10 = 138 */
> + int pwr_gpio_num = 138;
These could probably be #defines instead of
variables.
> + int status;
> +
> + status = gpio_request(bl_gpio_num, "lcd bl\n");
> + if (status < 0)
> + return status;
> +
> + status = gpio_request(pwr_gpio_num, "lcd pwr\n");
> + if (status < 0)
> + return status;
We are missing gpio_free of back light GPIO
here.
> +
> + gpio_direction_output(bl_gpio_num, 0);
> + gpio_direction_output(pwr_gpio_num, 0);
> +
> + /* disable lcd backlight */
> + gpio_set_value(bl_gpio_num, 0);
> +
> + /* disable lcd power */
> + gpio_set_value(pwr_gpio_num, 0);
> +
> + /* wait for sometime */
> + mdelay(3);
Can you explain the reasoning behind
the delay in the comment?
> +
> + /* disable lcdc */
> + davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, 1, DA8XX_LPSC1_LCDC, 0);
Hmm, why is this needed? Hopefully the LCD clock has
not been enabled by this time.
> +
> + /* wait for sometime */
> + mdelay(1);
Some explanation required here too.
> +
> + /* enable lcd power */
> + gpio_set_value(pwr_gpio_num, 1);
> +
> + /* enable lcdc */
> + davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, 1, DA8XX_LPSC1_LCDC, 1);
> +
> + /* wait for sometime */
> + mdelay(3);
> +
> + /* enable lcd backlight */
> + gpio_set_value(bl_gpio_num, 1);
> +
> + gpio_free(bl_gpio_num);
> + gpio_free(pwr_gpio_num);
> +
> + return 0;
> +}
> +
> static __init void da850_evm_init(void)
> {
> struct davinci_soc_info *soc_info = &davinci_soc_info;
> @@ -86,6 +142,21 @@ static __init void da850_evm_init(void)
> */
> __raw_writel(0, IO_ADDRESS(DA8XX_UART1_BASE) + 0x30);
> __raw_writel(0, IO_ADDRESS(DA8XX_UART0_BASE) + 0x30);
> +
> + 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 c5efc51..69acb6e 100644
> --- a/arch/arm/mach-davinci/da850.c
> +++ b/arch/arm/mach-davinci/da850.c
> @@ -290,6 +290,13 @@ static struct clk emac_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),
> @@ -327,6 +334,7 @@ static struct davinci_clk da850_clks[] = {
> CLK(NULL, "arm", &arm_clk),
> CLK(NULL, "rmii", &rmii_clk),
> CLK("davinci_emac.1", NULL, &emac_clk),
> + CLK("da8xx_lcdc.0", NULL, &lcdc_clk),
> CLK(NULL, NULL, NULL),
> };
>
> @@ -373,6 +381,30 @@ static const struct mux_config da850_pins[] = {
> MUX_CFG(DA850, MII_RXD_0, 3, 28, 15, 8, false)
> MUX_CFG(DA850, MDIO_CLK, 4, 0, 15, 8, false)
> MUX_CFG(DA850, MDIO_D, 4, 4, 15, 8, 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
> };
>
> @@ -410,6 +442,16 @@ const short da850_cpgmac_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 11c0971..ef7db41 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"
>
> @@ -285,3 +286,61 @@ int __init da8xx_register_emac(void)
> {
> return platform_device_register(&da8xx_emac_device);
> }
> +
> +static const struct display_panel disp_panel = {
> + QVGA,
> + 16,
> + 16,
> + COLOR_ACTIVE,
> +};
> +
> +static struct lcd_ctrl_config lcd_cfg = {
> + &disp_panel, /* p_disp_panel */
> + .ac_bias = 255, /* ac bias */
> + .ac_bias_intrpt = 0, /* ac bias intrpt */
> + .dma_burst_sz = 16, /* dma_burst_sz */
> + .bpp = 16, /* bpp */
> + .fdd = 255, /* fdd */
> + .tft_alt_mode = 0, /* tft_alt_mode */
> + .stn_565_mode = 0, /* stn_565_mode */
> + .mono_8bit_mode = 0, /* mono_8bit_mode */
> + .invert_line_clock = 1, /* invert_line_clock */
> + .invert_frm_clock = 1, /* invert_frm_clock */
> + .sync_edge = 0, /* sync_edge */
> + .sync_ctrl = 1, /* sync_ctrl */
> + .raster_order = 0, /* raster_order */
> +};
Comments at end of each line are not required.
Thanks,
Sekhar
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