From 89983478bdc99996bbc26bd63fd00358d3082cbe Mon Sep 17 00:00:00 2001 From: Sylvain Lemieux Date: Wed, 9 Sep 2015 11:35:58 -0400 Subject: gpio: lpc32xx: fix issues with port3 gpio The current simplify lpc32xx gpio driver implementation assume a maximum of 32 GPIO per port; there are a total of 22 GPI, 24 GPO and 6 GPIO to managed on port 3. Update the driver to fix the following: 1) When requesting GPI_xx and GPO_xx on port 3 (xx is the same number) the second call to "gpio_request" will return -EBUSY. 2) The status of GPO_xx pin report the status of the corresponding GPI_xx pin when using the "gpio status" command. 3) The gpio driver may setup the direction register for the wrong gpio when calling "gpio_direction_input" (GPI_xx) or "gpio_direction_output" (GPO_xx) on port 3; the call to the direction is require to use the "gpio status" command. The following change were done in the driver: 1) port3 GPI are cache in a separate 32 bits in the array. 2) port3 direction register written only for GPIO pins. 3) port3 GPO & GPIO (as output) are read using "p3_outp_state". 4) LPC32XX_GPI_P3_GRP updated to match the change. Signed-off-by: Sylvain Lemieux --- arch/arm/include/asm/arch-lpc32xx/gpio_grp.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/arm/include/asm/arch-lpc32xx') diff --git a/arch/arm/include/asm/arch-lpc32xx/gpio_grp.h b/arch/arm/include/asm/arch-lpc32xx/gpio_grp.h index c9cf9df7cb..64acf150a3 100644 --- a/arch/arm/include/asm/arch-lpc32xx/gpio_grp.h +++ b/arch/arm/include/asm/arch-lpc32xx/gpio_grp.h @@ -12,7 +12,7 @@ /* * Macro to map the pin for the lpc32xx_gpio driver. - * Note: - GPIOS are considered here as homogeneous and linear, from 0 to 127; + * Note: - GPIOS are considered here as homogeneous and linear from 0 to 159; * mapping is done per register, as group of 32. * (see drivers/gpio/lpc32xx_gpio.c for details). * - macros can be use with the following pins: @@ -26,9 +26,9 @@ #define LPC32XX_GPIO_P0_GRP 0 #define LPC32XX_GPIO_P1_GRP 32 #define LPC32XX_GPIO_P2_GRP 64 -#define LPC32XX_GPI_P3_GRP 96 #define LPC32XX_GPO_P3_GRP 96 #define LPC32XX_GPIO_P3_GRP (LPC32XX_GPO_P3_GRP + 25) +#define LPC32XX_GPI_P3_GRP 128 /* * A specific GPIO can be selected with this macro -- cgit v1.2.1