diff options
| -rw-r--r-- | common/ioexpander.c | 10 | ||||
| -rw-r--r-- | include/config.h | 7 | ||||
| -rw-r--r-- | include/ioexpander.h | 19 |
3 files changed, 36 insertions, 0 deletions
diff --git a/common/ioexpander.c b/common/ioexpander.c index 1e3f22764b..ccf3cc7c4a 100644 --- a/common/ioexpander.c +++ b/common/ioexpander.c @@ -152,6 +152,16 @@ int ioex_set_level(enum ioex_signal signal, int value) g->mask, value); } +#ifdef CONFIG_IO_EXPANDER_SUPPORT_GET_PORT +int ioex_get_port(int ioex, int port, int *val) +{ + if (ioex_config[ioex].drv->get_port == NULL) + return EC_ERROR_UNIMPLEMENTED; + + return ioex_config[ioex].drv->get_port(ioex, port, val); +} +#endif + int ioex_init(int ioex) { const struct ioex_info *g = ioex_list; diff --git a/include/config.h b/include/config.h index 4b7a0bedbd..e9e3105e5f 100644 --- a/include/config.h +++ b/include/config.h @@ -1468,6 +1468,13 @@ #undef CONFIG_IO_EXPANDER /* + * Enable reading levels for whole IO expander port with one call. + * This adds 'get_port' function pointer to 'ioexpander_drv' structure. + * Most drivers don't implement this functionality. + */ +#undef CONFIG_IO_EXPANDER_SUPPORT_GET_PORT + +/* * EC's supporting powering down GPIO pins. * Add flag GPIO_POWER_DOWN and additional API's. */ diff --git a/include/ioexpander.h b/include/ioexpander.h index c04cf83c9a..e952e373a7 100644 --- a/include/ioexpander.h +++ b/include/ioexpander.h @@ -32,6 +32,9 @@ extern const struct ioex_info ioex_list[]; extern void (* const ioex_irq_handlers[])(enum ioex_signal signal); extern const int ioex_ih_count; +/* Get ioex_info structure for specified signal */ +#define IOEX_GET_INFO(signal) (ioex_list + (signal) - IOEX_SIGNAL_START) + struct ioexpander_drv { /* Initialize IO expander chip/driver */ int (*init)(int ioex); @@ -45,6 +48,10 @@ struct ioexpander_drv { int (*set_flags_by_mask)(int ioex, int port, int mask, int flags); /* Enable/disable interrupt for the IOEX pin */ int (*enable_interrupt)(int ioex, int port, int mask, int enable); +#ifdef CONFIG_IO_EXPANDER_SUPPORT_GET_PORT + /* Read levels for whole IOEX port */ + int (*get_port)(int ioex, int port, int *val); +#endif }; /* IO expander chip disabled. No I2C communication will be attempted. */ @@ -118,6 +125,18 @@ int ioex_get_level(enum ioex_signal signal, int *val); */ int ioex_set_level(enum ioex_signal signal, int value); +#ifdef CONFIG_IO_EXPANDER_SUPPORT_GET_PORT +/* + * Get the current levels on the IOEX port + * + * @param ioex Number of I/O expander + * @param port Number of port in ioex + * @param val Pointer to variable where port will be read + * @return EC_SUCCESS if successful, non-zero if error. + */ +int ioex_get_port(int ioex, int port, int *val); +#endif + /* * Initialize IO expander chip/driver * |