This is what I'm using in APEX. I'm not sure that it works as I know I had some of the fields mis-specified at one point. You can download apex and try it without reflashing.
http://wiki.buici.com
#if defined (CONFIG_LCD_3_5_QVGA_20)
/* Sharp PN LQ035Q7DB02 */
# define PANEL_NAME "LCD 3.5\" QVGA"
# define PEL_CLOCK_EST (6800*1000) /* MHz/4.5/?/6.8 */
# define PEL_CLOCK_DIV CLOCK_TO_DIV(PEL_CLOCK_EST, HCLK)
# define PEL_CLOCK (HCLK/PEL_CLOCK_DIV)
# define PEL_WIDTH (240)
# define PEL_HEIGHT (320)
# define BIT_DEPTH (16)
# define BITS_PER_PEL_2 BPP16
# define HSYNC_WIDTH (61)
# define VSYNC_WIDTH NS_TO_CLOCK (60, PEL_CLOCK)
# define HORZ_BP (16)
# define HORZ_FP (21)
# define VERT_BP (8) /* 8 */
# define VERT_FP (5)
# define INVERT_PIXEL_CLOCK
#endif