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https://github.com/AsahiLinux/u-boot
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c9dffc9719
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>
55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+
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*
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* Copyright (c) 2015 Free Electrons
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* Copyright (c) 2015 NextThing Co
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*
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*/
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#ifndef __W1_H
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#define __W1_H
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struct udevice;
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#define W1_FAMILY_DS24B33 0x23
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#define W1_FAMILY_DS2431 0x2d
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#define W1_FAMILY_DS2502 0x09
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#define W1_FAMILY_EEP_SANDBOX 0xfe
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struct w1_driver_entry {
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struct driver *driver;
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u8 *family;
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};
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/* U_BOOT_W1_DEVICE() tells U-Boot to create a one-wire device.
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*
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* @__name: Device name (C identifier, not a string. E.g. gpio7_at_ff7e0000)
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* @__driver: Driver name (C identifier, not a string. E.g. gpio7_at_ff7e0000)
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* @__family: Family code number of the one-wire
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*/
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#define U_BOOT_W1_DEVICE(__name, __family) \
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ll_entry_declare(struct w1_driver_entry, __name, w1_driver_entry) = { \
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.driver = llsym(struct driver, __name, driver), \
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.family = __family, \
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}
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struct w1_device {
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u64 id;
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};
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struct w1_ops {
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u8 (*read_byte)(struct udevice *dev);
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bool (*reset)(struct udevice *dev);
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u8 (*triplet)(struct udevice *dev, bool bdir);
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void (*write_byte)(struct udevice *dev, u8 byte);
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};
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int w1_get_bus(int busnum, struct udevice **busp);
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u8 w1_get_device_family(struct udevice *dev);
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int w1_read_buf(struct udevice *dev, u8 *buf, unsigned int count);
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int w1_read_byte(struct udevice *dev);
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int w1_reset_select(struct udevice *dev);
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int w1_write_buf(struct udevice *dev, u8 *buf, unsigned int count);
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int w1_write_byte(struct udevice *dev, u8 byte);
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#endif
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