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authorLinus Torvalds <torvalds@linux-foundation.org>2020-02-07 12:54:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-02-07 12:54:13 -0800
commit11777ee8b04acab07c96959e9c6ac6a1603d0958 (patch)
tree52a7bf02de5076afd4bac1b351bdd2f7c59ff847 /include/linux
parented39ba0ec1156407040e7509cb19299b5dda3815 (diff)
parentb49f8e0e7bd17b968129790e40f9e2566f4f95ec (diff)
Merge branch 'i2c/for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c updates from Wolfram Sang: "i2c core: - huge improvements and refactorizations of the Linux I2C documentation (lots of thanks to Luca for doing it and Jean for the careful review) - subsystem wide API conversion to i2c_new_client_device() - remove obsolete parport-light driver - smaller core updates (removal of 'extern', enabling more compile testing, use more helper macros) - and quite a bunch of driver updates (new IDs, simplifications, better PM, support of atomic transfers and other improvements) i2c-mux: - The main feature is the idle-state rework of the pca954x driver from Biwen Li at24 driver: - minor maintenance: update the license tag, sort headers - move support for the write-protect pin into nvmem core - add a reference to the new wp-gpios property in nvmem to at25 bindings - add support for regulator and pm_runtime control" * 'i2c/for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (91 commits) i2c: cros-ec-tunnel: Fix ACPI identifier i2c: cros-ec-tunnel: Fix slave device enumeration i2c: stm32f7: add PM_SLEEP suspend/resume support i2c: cadence: Fix wording in i2c-cadence driver i2c: cadence: Fix power management order of operations i2c: cadence: Fix error printing in case of defer i2c: cadence: Handle transfer_size rollover i2c: i801: Add support for Intel Comet Lake PCH-V docs: i2c: writing-clients: properly name the stop condition docs: i2c: i2c-protocol: use same wording as smbus-protocol docs: i2c: rename sections so the overall picture is clearer docs: i2c: old-module-parameters: use monospace instead of "" docs: i2c: old-module-parameters: clarify this is for obsolete kernels docs: i2c: old-module-parameters: fix internal hyperlink docs: i2c: instantiating-devices: use monospace for sysfs attributes docs: i2c: instantiating-devices: rearrange static instatiation docs: i2c: instantiating-devices: fix internal hyperlink docs: i2c: smbus-protocol: improve I2C Block transactions description docs: i2c: smbus-protocol: fix punctuation docs: i2c: smbus-protocol: fix typo ...
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/i2c.h115
-rw-r--r--include/linux/nvmem-provider.h3
2 files changed, 58 insertions, 60 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 582ef05ec07e..f834687989f7 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -50,8 +50,8 @@ struct property_entry;
* transmit an arbitrary number of messages without interruption.
* @count must be be less than 64k since msg.len is u16.
*/
-extern int i2c_transfer_buffer_flags(const struct i2c_client *client,
- char *buf, int count, u16 flags);
+int i2c_transfer_buffer_flags(const struct i2c_client *client,
+ char *buf, int count, u16 flags);
/**
* i2c_master_recv - issue a single I2C message in master receive mode
@@ -115,11 +115,9 @@ static inline int i2c_master_send_dmasafe(const struct i2c_client *client,
/* Transfer num messages.
*/
-extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
- int num);
+int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num);
/* Unlocked flavor */
-extern int __i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
- int num);
+int __i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num);
/* This is the very generalized SMBus access routine. You probably do not
want to use this, though; one of the functions below may be much easier,
@@ -138,16 +136,14 @@ s32 __i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr,
/* Now follow the 'nice' access routines. These also document the calling
conventions of i2c_smbus_xfer. */
-extern s32 i2c_smbus_read_byte(const struct i2c_client *client);
-extern s32 i2c_smbus_write_byte(const struct i2c_client *client, u8 value);
-extern s32 i2c_smbus_read_byte_data(const struct i2c_client *client,
- u8 command);
-extern s32 i2c_smbus_write_byte_data(const struct i2c_client *client,
- u8 command, u8 value);
-extern s32 i2c_smbus_read_word_data(const struct i2c_client *client,
- u8 command);
-extern s32 i2c_smbus_write_word_data(const struct i2c_client *client,
- u8 command, u16 value);
+s32 i2c_smbus_read_byte(const struct i2c_client *client);
+s32 i2c_smbus_write_byte(const struct i2c_client *client, u8 value);
+s32 i2c_smbus_read_byte_data(const struct i2c_client *client, u8 command);
+s32 i2c_smbus_write_byte_data(const struct i2c_client *client,
+ u8 command, u8 value);
+s32 i2c_smbus_read_word_data(const struct i2c_client *client, u8 command);
+s32 i2c_smbus_write_word_data(const struct i2c_client *client,
+ u8 command, u16 value);
static inline s32
i2c_smbus_read_word_swapped(const struct i2c_client *client, u8 command)
@@ -165,19 +161,18 @@ i2c_smbus_write_word_swapped(const struct i2c_client *client,
}
/* Returns the number of read bytes */
-extern s32 i2c_smbus_read_block_data(const struct i2c_client *client,
- u8 command, u8 *values);
-extern s32 i2c_smbus_write_block_data(const struct i2c_client *client,
- u8 command, u8 length, const u8 *values);
+s32 i2c_smbus_read_block_data(const struct i2c_client *client,
+ u8 command, u8 *values);
+s32 i2c_smbus_write_block_data(const struct i2c_client *client,
+ u8 command, u8 length, const u8 *values);
/* Returns the number of read bytes */
-extern s32 i2c_smbus_read_i2c_block_data(const struct i2c_client *client,
- u8 command, u8 length, u8 *values);
-extern s32 i2c_smbus_write_i2c_block_data(const struct i2c_client *client,
- u8 command, u8 length,
- const u8 *values);
-extern s32
-i2c_smbus_read_i2c_block_data_or_emulated(const struct i2c_client *client,
- u8 command, u8 length, u8 *values);
+s32 i2c_smbus_read_i2c_block_data(const struct i2c_client *client,
+ u8 command, u8 length, u8 *values);
+s32 i2c_smbus_write_i2c_block_data(const struct i2c_client *client,
+ u8 command, u8 length, const u8 *values);
+s32 i2c_smbus_read_i2c_block_data_or_emulated(const struct i2c_client *client,
+ u8 command, u8 length,
+ u8 *values);
int i2c_get_device_id(const struct i2c_client *client,
struct i2c_device_identity *id);
#endif /* I2C */
@@ -337,10 +332,10 @@ struct i2c_client {
};
#define to_i2c_client(d) container_of(d, struct i2c_client, dev)
-extern struct i2c_client *i2c_verify_client(struct device *dev);
-extern struct i2c_adapter *i2c_verify_adapter(struct device *dev);
-extern const struct i2c_device_id *i2c_match_id(const struct i2c_device_id *id,
- const struct i2c_client *client);
+struct i2c_client *i2c_verify_client(struct device *dev);
+struct i2c_adapter *i2c_verify_adapter(struct device *dev);
+const struct i2c_device_id *i2c_match_id(const struct i2c_device_id *id,
+ const struct i2c_client *client);
static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj)
{
@@ -369,9 +364,9 @@ enum i2c_slave_event {
I2C_SLAVE_STOP,
};
-extern int i2c_slave_register(struct i2c_client *client, i2c_slave_cb_t slave_cb);
-extern int i2c_slave_unregister(struct i2c_client *client);
-extern bool i2c_detect_slave_mode(struct device *dev);
+int i2c_slave_register(struct i2c_client *client, i2c_slave_cb_t slave_cb);
+int i2c_slave_unregister(struct i2c_client *client);
+bool i2c_detect_slave_mode(struct device *dev);
static inline int i2c_slave_event(struct i2c_client *client,
enum i2c_slave_event event, u8 *val)
@@ -440,10 +435,10 @@ struct i2c_board_info {
* with integrated I2C, a config eeprom, sensors, and a codec that's
* used in conjunction with the primary hardware.
*/
-extern struct i2c_client *
+struct i2c_client *
i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info);
-extern struct i2c_client *
+struct i2c_client *
i2c_new_client_device(struct i2c_adapter *adap, struct i2c_board_info const *info);
/* If you don't know the exact address of an I2C device, use this variant
@@ -452,33 +447,33 @@ i2c_new_client_device(struct i2c_adapter *adap, struct i2c_board_info const *inf
* it must return 1 on successful probe, 0 otherwise. If it is not provided,
* a default probing method is used.
*/
-extern struct i2c_client *
+struct i2c_client *
i2c_new_scanned_device(struct i2c_adapter *adap,
struct i2c_board_info *info,
unsigned short const *addr_list,
int (*probe)(struct i2c_adapter *adap, unsigned short addr));
-extern struct i2c_client *
+struct i2c_client *
i2c_new_probed_device(struct i2c_adapter *adap,
struct i2c_board_info *info,
unsigned short const *addr_list,
int (*probe)(struct i2c_adapter *adap, unsigned short addr));
/* Common custom probe functions */
-extern int i2c_probe_func_quick_read(struct i2c_adapter *adap, unsigned short addr);
+int i2c_probe_func_quick_read(struct i2c_adapter *adap, unsigned short addr);
-extern struct i2c_client *
+struct i2c_client *
i2c_new_dummy_device(struct i2c_adapter *adapter, u16 address);
-extern struct i2c_client *
+struct i2c_client *
devm_i2c_new_dummy_device(struct device *dev, struct i2c_adapter *adap, u16 address);
-extern struct i2c_client *
+struct i2c_client *
i2c_new_ancillary_device(struct i2c_client *client,
- const char *name,
- u16 default_addr);
+ const char *name,
+ u16 default_addr);
-extern void i2c_unregister_device(struct i2c_client *client);
+void i2c_unregister_device(struct i2c_client *client);
#endif /* I2C */
/* Mainboard arch_initcall() code should register all its I2C devices.
@@ -486,7 +481,7 @@ extern void i2c_unregister_device(struct i2c_client *client);
* Modules for add-on boards must use other calls.
*/
#ifdef CONFIG_I2C_BOARDINFO
-extern int
+int
i2c_register_board_info(int busnum, struct i2c_board_info const *info,
unsigned n);
#else
@@ -840,12 +835,12 @@ static inline void i2c_mark_adapter_resumed(struct i2c_adapter *adap)
/* administration...
*/
#if IS_ENABLED(CONFIG_I2C)
-extern int i2c_add_adapter(struct i2c_adapter *adap);
-extern void i2c_del_adapter(struct i2c_adapter *adap);
-extern int i2c_add_numbered_adapter(struct i2c_adapter *adap);
+int i2c_add_adapter(struct i2c_adapter *adap);
+void i2c_del_adapter(struct i2c_adapter *adap);
+int i2c_add_numbered_adapter(struct i2c_adapter *adap);
-extern int i2c_register_driver(struct module *owner, struct i2c_driver *driver);
-extern void i2c_del_driver(struct i2c_driver *driver);
+int i2c_register_driver(struct module *owner, struct i2c_driver *driver);
+void i2c_del_driver(struct i2c_driver *driver);
/* use a define to avoid include chaining to get THIS_MODULE */
#define i2c_add_driver(driver) \
@@ -858,12 +853,12 @@ static inline bool i2c_client_has_driver(struct i2c_client *client)
/* call the i2c_client->command() of all attached clients with
* the given arguments */
-extern void i2c_clients_command(struct i2c_adapter *adap,
- unsigned int cmd, void *arg);
+void i2c_clients_command(struct i2c_adapter *adap,
+ unsigned int cmd, void *arg);
-extern struct i2c_adapter *i2c_get_adapter(int nr);
-extern void i2c_put_adapter(struct i2c_adapter *adap);
-extern unsigned int i2c_adapter_depth(struct i2c_adapter *adapter);
+struct i2c_adapter *i2c_get_adapter(int nr);
+void i2c_put_adapter(struct i2c_adapter *adap);
+unsigned int i2c_adapter_depth(struct i2c_adapter *adapter);
void i2c_parse_fw_timings(struct device *dev, struct i2c_timings *t, bool use_defaults);
@@ -935,15 +930,15 @@ int i2c_handle_smbus_host_notify(struct i2c_adapter *adap, unsigned short addr);
#if IS_ENABLED(CONFIG_OF)
/* must call put_device() when done with returned i2c_client device */
-extern struct i2c_client *of_find_i2c_device_by_node(struct device_node *node);
+struct i2c_client *of_find_i2c_device_by_node(struct device_node *node);
/* must call put_device() when done with returned i2c_adapter device */
-extern struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node);
+struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node);
/* must call i2c_put_adapter() when done with returned i2c_adapter device */
struct i2c_adapter *of_get_i2c_adapter_by_node(struct device_node *node);
-extern const struct of_device_id
+const struct of_device_id
*i2c_of_match_device(const struct of_device_id *matches,
struct i2c_client *client);
diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h
index fe051323be0a..6d6f8e5d24c9 100644
--- a/include/linux/nvmem-provider.h
+++ b/include/linux/nvmem-provider.h
@@ -11,6 +11,7 @@
#include <linux/err.h>
#include <linux/errno.h>
+#include <linux/gpio/consumer.h>
struct nvmem_device;
struct nvmem_cell_info;
@@ -45,6 +46,7 @@ enum nvmem_type {
* @word_size: Minimum read/write access granularity.
* @stride: Minimum read/write access stride.
* @priv: User context passed to read/write callbacks.
+ * @wp-gpio: Write protect pin
*
* Note: A default "nvmem<id>" name will be assigned to the device if
* no name is specified in its configuration. In such case "<id>" is
@@ -58,6 +60,7 @@ struct nvmem_config {
const char *name;
int id;
struct module *owner;
+ struct gpio_desc *wp_gpio;
const struct nvmem_cell_info *cells;
int ncells;
enum nvmem_type type;