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w1: replace dt detection by automatic detection

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This patch changes the functioning of the detection of w1 devices.
The old way was a comparison between detected w1 and the ones described in
the device tree. Now it will just look for the driver matching the family
id of the w1 detected.

The patch is inspired from Maxime Ripard code.

Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
Reviewed-by: Maxime Ripard <maxime@cerno.tech>
This commit is contained in:
Kory Maincent
2021-05-04 19:31:26 +02:00
committed by Tom Rini
parent 0705e25cd0
commit c9dffc9719
6 changed files with 104 additions and 35 deletions
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2
include/w1-eeprom.h
View File

@@ -27,7 +27,5 @@ int w1_eeprom_read_buf(struct udevice *dev, unsigned int offset,
int w1_eeprom_dm_init(void);
int w1_eeprom_register_new_device(u64 id);
int w1_eeprom_get_id(struct udevice *dev, u64 *id);
#endif

17
include/w1.h
View File

@@ -15,6 +15,23 @@ struct udevice;
#define W1_FAMILY_DS2502 0x09
#define W1_FAMILY_EEP_SANDBOX 0xfe
struct w1_driver_entry {
struct driver *driver;
u8 *family;
};
/* U_BOOT_W1_DEVICE() tells U-Boot to create a one-wire device.
*
* @__name: Device name (C identifier, not a string. E.g. gpio7_at_ff7e0000)
* @__driver: Driver name (C identifier, not a string. E.g. gpio7_at_ff7e0000)
* @__family: Family code number of the one-wire
*/
#define U_BOOT_W1_DEVICE(__name, __family) \
ll_entry_declare(struct w1_driver_entry, __name, w1_driver_entry) = { \
.driver = llsym(struct driver, __name, driver), \
.family = __family, \
}
struct w1_device {
u64 id;
};