Hi all,
In board/davinci/da8xxevm/da850.c
#ifdef CONFIG_USE_NOR /* Set the GPIO direction as output */ clrbits_be32((u32 *)GPIO_BANK0_REG_DIR_ADDR, (0x01 << 11));
/* Set the output as low */ val = readl(GPIO_BANK0_REG_SET_ADDR); val |= (0x01 << 11); writel(val, GPIO_BANK0_REG_CLR_ADDR); #endif
It works, however is it the right way to put a gpio low ? Why do we need to read the SET register, change its content, and write the CLR register ?
A second question is also related to GPIO control from within board_init. I can toggle GP2[6] high or low using the code above, but I cannot do the same for GP2[12]. Why ?
After having done the following, the pin 25 of J30 still remain to logic level 1 !
int mycode(void) { const struct pinmux_config gpio_pins[] = { { pinmux(5), 8, 3 }, };
u32 val;
/* PinMux for GPIO */ if (davinci_configure_pin_mux(gpio_pins, ARRAY_SIZE(gpio_pins)) != 0) return 1;
/* Set the GPIO direction as output */ clrbits_be32((u32 *)GPIO_BANK2_REG_DIR_ADDR, (0x01 << 12));
/* Set the output as low */ val = readl(GPIO_BANK2_REG_CLR_ADDR); val |= (0x01 << 12); writel(val, GPIO_BANK2_REG_CLR_ADDR);
return 0; }
Thanks, Gabriele