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https://github.com/AsahiLinux/u-boot
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e38cef9f6e
Linux kernel binding is using atmel,24c08 compatible string. On the other hand there is atmel,24c08a which is not listed in the kernel. Add compatible string without "a" suffix to be compatible with Linux kernel binding. These eeproms are available on several ZynqMP development boards. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2014 Google, Inc
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*/
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#include <common.h>
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#include <linux/err.h>
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#include <dm.h>
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#include <i2c.h>
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#include <i2c_eeprom.h>
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int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size)
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{
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const struct i2c_eeprom_ops *ops = device_get_ops(dev);
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if (!ops->read)
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return -ENOSYS;
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return ops->read(dev, offset, buf, size);
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}
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int i2c_eeprom_write(struct udevice *dev, int offset, uint8_t *buf, int size)
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{
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const struct i2c_eeprom_ops *ops = device_get_ops(dev);
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if (!ops->write)
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return -ENOSYS;
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return ops->write(dev, offset, buf, size);
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}
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static int i2c_eeprom_std_read(struct udevice *dev, int offset, uint8_t *buf,
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int size)
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{
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return dm_i2c_read(dev, offset, buf, size);
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}
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static int i2c_eeprom_std_write(struct udevice *dev, int offset,
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const uint8_t *buf, int size)
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{
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return -ENODEV;
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}
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static const struct i2c_eeprom_ops i2c_eeprom_std_ops = {
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.read = i2c_eeprom_std_read,
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.write = i2c_eeprom_std_write,
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};
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static int i2c_eeprom_std_ofdata_to_platdata(struct udevice *dev)
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{
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struct i2c_eeprom *priv = dev_get_priv(dev);
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u64 data = dev_get_driver_data(dev);
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/* 6 bit -> page size of up to 2^63 (should be sufficient) */
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priv->pagewidth = data & 0x3F;
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priv->pagesize = (1 << priv->pagewidth);
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return 0;
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}
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static int i2c_eeprom_std_probe(struct udevice *dev)
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{
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return 0;
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}
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static const struct udevice_id i2c_eeprom_std_ids[] = {
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{ .compatible = "i2c-eeprom", .data = 0 },
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{ .compatible = "microchip,24aa02e48", .data = 3 },
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{ .compatible = "atmel,24c01a", .data = 3 },
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{ .compatible = "atmel,24c02", .data = 3 },
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{ .compatible = "atmel,24c04", .data = 4 },
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{ .compatible = "atmel,24c08", .data = 4 },
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{ .compatible = "atmel,24c08a", .data = 4 },
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{ .compatible = "atmel,24c16a", .data = 4 },
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{ .compatible = "atmel,24mac402", .data = 4 },
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{ .compatible = "atmel,24c32", .data = 5 },
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{ .compatible = "atmel,24c64", .data = 5 },
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{ .compatible = "atmel,24c128", .data = 6 },
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{ .compatible = "atmel,24c256", .data = 6 },
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{ .compatible = "atmel,24c512", .data = 6 },
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{ }
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};
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U_BOOT_DRIVER(i2c_eeprom_std) = {
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.name = "i2c_eeprom",
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.id = UCLASS_I2C_EEPROM,
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.of_match = i2c_eeprom_std_ids,
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.probe = i2c_eeprom_std_probe,
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.ofdata_to_platdata = i2c_eeprom_std_ofdata_to_platdata,
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.priv_auto_alloc_size = sizeof(struct i2c_eeprom),
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.ops = &i2c_eeprom_std_ops,
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};
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UCLASS_DRIVER(i2c_eeprom) = {
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.id = UCLASS_I2C_EEPROM,
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.name = "i2c_eeprom",
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};
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