diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/i2c-smbus.h | 29 | ||||
| -rw-r--r-- | include/linux/i2c.h | 15 | ||||
| -rw-r--r-- | include/linux/platform_data/at24.h | 11 |
3 files changed, 50 insertions, 5 deletions
diff --git a/include/linux/i2c-smbus.h b/include/linux/i2c-smbus.h index 8f1b086ca5bc..c2e3324f9468 100644 --- a/include/linux/i2c-smbus.h +++ b/include/linux/i2c-smbus.h @@ -23,6 +23,8 @@ #define _LINUX_I2C_SMBUS_H #include <linux/i2c.h> +#include <linux/spinlock.h> +#include <linux/workqueue.h> /** @@ -48,4 +50,31 @@ struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter, struct i2c_smbus_alert_setup *setup); int i2c_handle_smbus_alert(struct i2c_client *ara); +/** + * smbus_host_notify - internal structure used by the Host Notify mechanism. + * @adapter: the I2C adapter associated with this struct + * @work: worker used to schedule the IRQ in the slave device + * @lock: spinlock to check if a notification is already pending + * @pending: flag set when a notification is pending (any new notification will + * be rejected if pending is true) + * @payload: the actual payload of the Host Notify event + * @addr: the address of the slave device which raised the notification + * + * This struct needs to be allocated by i2c_setup_smbus_host_notify() and does + * not need to be freed. Internally, i2c_setup_smbus_host_notify() uses a + * managed resource to clean this up when the adapter get released. + */ +struct smbus_host_notify { + struct i2c_adapter *adapter; + struct work_struct work; + spinlock_t lock; + bool pending; + u16 payload; + u8 addr; +}; + +struct smbus_host_notify *i2c_setup_smbus_host_notify(struct i2c_adapter *adap); +int i2c_handle_smbus_host_notify(struct smbus_host_notify *host_notify, + unsigned short addr, unsigned int data); + #endif /* _LINUX_I2C_SMBUS_H */ diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 96a25ae14494..fffdc270ca18 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -126,6 +126,11 @@ i2c_smbus_read_i2c_block_data_or_emulated(const struct i2c_client *client, u8 command, u8 length, u8 *values); #endif /* I2C */ +enum i2c_alert_protocol { + I2C_PROTOCOL_SMBUS_ALERT, + I2C_PROTOCOL_SMBUS_HOST_NOTIFY, +}; + /** * struct i2c_driver - represent an I2C device driver * @class: What kind of i2c device we instantiate (for detect) @@ -180,8 +185,11 @@ struct i2c_driver { * The format and meaning of the data value depends on the protocol. * For the SMBus alert protocol, there is a single bit of data passed * as the alert response's low bit ("event flag"). + * For the SMBus Host Notify protocol, the data corresponds to the + * 16-bit payload data reported by the slave device acting as master. */ - void (*alert)(struct i2c_client *, unsigned int data); + void (*alert)(struct i2c_client *, enum i2c_alert_protocol protocol, + unsigned int data); /* a ioctl like command that can be used to perform specific functions * with the device. @@ -349,6 +357,11 @@ extern int i2c_probe_func_quick_read(struct i2c_adapter *, unsigned short addr); extern struct i2c_client * i2c_new_dummy(struct i2c_adapter *adap, u16 address); +extern struct i2c_client * +i2c_new_secondary_device(struct i2c_client *client, + const char *name, + u16 default_addr); + extern void i2c_unregister_device(struct i2c_client *); #endif /* I2C */ diff --git a/include/linux/platform_data/at24.h b/include/linux/platform_data/at24.h index be830b141d83..271a4e25af67 100644 --- a/include/linux/platform_data/at24.h +++ b/include/linux/platform_data/at24.h @@ -10,6 +10,7 @@ #include <linux/types.h> #include <linux/nvmem-consumer.h> +#include <linux/bitops.h> /** * struct at24_platform_data - data to set up at24 (generic eeprom) driver @@ -43,10 +44,12 @@ struct at24_platform_data { u32 byte_len; /* size (sum of all addr) */ u16 page_size; /* for writes */ u8 flags; -#define AT24_FLAG_ADDR16 0x80 /* address pointer is 16 bit */ -#define AT24_FLAG_READONLY 0x40 /* sysfs-entry will be read-only */ -#define AT24_FLAG_IRUGO 0x20 /* sysfs-entry will be world-readable */ -#define AT24_FLAG_TAKE8ADDR 0x10 /* take always 8 addresses (24c00) */ +#define AT24_FLAG_ADDR16 BIT(7) /* address pointer is 16 bit */ +#define AT24_FLAG_READONLY BIT(6) /* sysfs-entry will be read-only */ +#define AT24_FLAG_IRUGO BIT(5) /* sysfs-entry will be world-readable */ +#define AT24_FLAG_TAKE8ADDR BIT(4) /* take always 8 addresses (24c00) */ +#define AT24_FLAG_SERIAL BIT(3) /* factory-programmed serial number */ +#define AT24_FLAG_MAC BIT(2) /* factory-programmed mac address */ void (*setup)(struct nvmem_device *nvmem, void *context); void *context; |