lpc3250 TFT-4238液晶支持

TFT-4238液晶和原来的TFT-6862差别较大。

这个屏的时钟和信号极性为低电平，需要修改LCD_POL寄存器(0x3104 0008)的bit14为1.

【arch/arm/mach-lpc32xx/clocks-lpc32xx.c】

1623         tmp &= ~(0xF800001F);

1624         tmp &= ~CLCDC_LCDTIMING2_BCD;

1625         tmp |= (div & 0x1F);

1626         tmp |= (((div >> 5) & 0x1F) << 27);

1627         tmp |= (1<<14);//POL low ABING for TFT-4238

1628         __raw_writel(tmp, CLCD_POL(io_p2v(LCD_BASE)));

1629         local_onoff_enable(clk, 1);

【./arch/arm/mach-lpc32xx/clocks-lpc32xx.c】

233 /* TFT-4238 */

234 static struct clcd_panel conn_lcd_panel = {

235     .mode       = {

236         .name       = "QVGA TFT-4238",

237         .refresh    = 65,

238         .xres       = 320,

239         .yres       = 240,

240         .pixclock   = 80000,

241         .left_margin    = 19,

242         .right_margin   = 12,

243         .upper_margin   = 1,

244         .lower_margin   = 4,

245         .hsync_len  = 3,

246         .vsync_len  = 16,

247         .sync       = 1,

248         .vmode      = FB_VMODE_NONINTERLACED,

249     },

250     .width      = -1,

251     .height     = -1,

252     .tim2       = (CLCDC_LCDTIMING2_IVS | CLCDC_LCDTIMING2_IHS),

253     .cntl       = (CNTL_BGR | CLCDC_LCDCTRL_TFT | CNTL_LCDVCOMP(1) |

254                 CLCDC_LCDCTRL_BPP16_565),

255     .bpp        = 16,

256 };

257 #define PANEL_SIZE (3 * SZ_64K)