Led tick driver

Hardware resource LED2--GPO_06 control. Porting code gpio underlying API gpio-related underlying API is implemented in the arch/ARM/mach-lpc32xx/include/Mach/lpc32xx_gpio.h file. Usage example: 536/* Set led gpio as an output */537 _ raw_writel (outp_state_gpo (1), gpio_p2_dir_set (gpio_iobase )); 292/* enable the backlight */293 # If defined (outputs) 294 _ raw_writel (outp_state_gpo (4), gpio_p3_outp_clr (gpio_iobase); 295 # Elif defined (outputs) 296 _ raw_writel (outp_state_gpo (4), gpio_p3_outp_set (gpio_iobase); 297 # endif LED driver GP O_06 is a function reuse pin, gpo_06 and lcdvd [18]. Select the register p3_mux_clr [6] and set it to gpo_06: Code __raw_writel (1 <6), lower (gpio_iobase); pull high and lower gpo_06, registers: p3_outp_set and p3_outp_clr, all are bit6: Code :__ raw_writel (outp_state_gpo (6), round (gpio_iobase); _ raw_writel (outp_state_gpo (6), round (gpio_iobase); definition of round :. /ARCH/ARM/mach-lpc32xx/arch-lpc32xx.c: # define gpio_iobase io_p2v (gpio_base ). /ARCH/ARM/mach-lpc32xx/sys-lpc32xx.h: # define gpio_iobase io_p2v (gpio_base) Tick implementation code ARCH/ARM/mach-lpc32xx/sys-lpc32xx.h file: 69 # Elif defined (config_smartarm3250_enable_led_tick) 70 # define ledtick {\ 71 static int blink = 0; \ 72 static int tick1 = 0; \ 73 tick1 ++; \ 74 if (tick1> Hz) \ 75 {\ 76 tick1 = 0; \ 77 blink = 1-blink; \ 78 If (blink = 0) {\ 79 _ raw_writel (outp_state_gpo (6 ), gpio_p3_outp_set (gpio_iobase); \ 80} \ 81 else {\ 82 _ raw_writel (outp_state_gpo (6), gpio_p3_outp_clr (gpio_iobase )); \ 83} \ 84} \ 85} 86 # else