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Signed-off-by: Michel-FK <michel.stempin@funkey-project.com>
This commit is contained in:
Michel-FK 2021-04-05 10:03:33 +02:00
parent 4f806cd712
commit 0f5df6c406
1 changed files with 22 additions and 0 deletions
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22
gpio_mapping.c
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@ -66,18 +66,34 @@
//#define TIMEOUT_SEC_SANITY_CHECK_GPIO_EXP 1
#define TIMEOUT_MICROSEC_SANITY_CHECK_GPIO_EXP (30 * 1000)
/* Short Power Enable Key (PEK) duration in microseconds */
#define SHORT_PEK_PRESS_DURATION_US (200 * 1000)
/* PCAL6416A I2C GPIO expander interrupt pin */
#define GPIO_PIN_I2C_EXPANDER_INTERRUPT ((('B' - '@') << 4) + 3) // PB3
/* AXP209 I2C PMIC interrupt pin */
#define GPIO_PIN_AXP209_INTERRUPT ((('B' - '@') << 4) + 5) // PB5
/* Pseudo-bitmask for the short PEK key press */
#define SHORT_PEK_PRESS_GPIO_MASK (1 << 5)
/* Pseudo-bitmask for the NOE signal */
#define NOE_GPIO_MASK (1 << 10)
/* Shell command for shutdown upon receiving either long PEK or NOE signal */
#define SHELL_COMMAND_SHUTDOWN "sched_shutdown 0.1"
/* PCAL6416A/PCAL9539A I2C GPIO expander chip pseudo-file descriptor */
static int fd_pcal6416a;
/* AXP209 I2C PMIC pseudo-file descriptor */
static int fd_axp209;
/* Mask of monitored GPIOs */
static uint32_t monitored_gpio_mask;
/* Mask of current GPIOs */
static uint32_t current_gpio_mask;
/* Search for the GPIO mask into the mapping and apply the required actions */
@ -254,12 +270,18 @@ void handle_gpio_mapping(mapping_list_t *list)
FD_SET(fd_axp209, &fds);
max_fd = (fd_pcal6416a > fd_axp209) ? fd_pcal6416a : fd_axp209;
#ifdef TIMEOUT_MICROSEC_SANITY_CHECK_GPIO_EXP
/* Select with normal (short) timeout */
struct timeval timeout = {0, TIMEOUT_MICROSEC_SANITY_CHECK_GPIO_EXP};
result = select(max_fd + 1, NULL, NULL, &fds, &timeout);
#elif TIMEOUT_SEC_SANITY_CHECK_GPIO_EXP
/* Select with debug (slow) timeout */
struct timeval timeout = {TIMEOUT_SEC_SANITY_CHECK_GPIO_EXP, 0};
result = select(max_fd + 1, NULL, NULL, &fds, &timeout);
#else
/* Select with no timeout */
result = select(max_fd + 1, NULL, NULL, &fds, NULL);
#endif
if (result == 0) {