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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+
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*
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* Copyright (c) 2018 Microchip Technology, Inc.
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*
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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 <w1-eeprom.h>
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#include <w1.h>
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#define W1_F2D_READ_EEPROM 0xf0
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#define EEP_SANDBOX_SAMPLE_MEM "this is a sample EEPROM memory string."
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static int eep_sandbox_read_buf(struct udevice *dev, unsigned int offset,
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u8 *buf, unsigned int count)
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{
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/* do not allow to copy more than our maximum sample string */
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if (offset + count < strlen(EEP_SANDBOX_SAMPLE_MEM)) {
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offset = 0;
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count = strlen(EEP_SANDBOX_SAMPLE_MEM);
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}
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strncpy((char *)buf, EEP_SANDBOX_SAMPLE_MEM, count);
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/*
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* in case the w1 subsystem uses some different kind of sandbox testing,
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* like randomized gpio values , we take the buffer from there
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*/
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w1_reset_select(dev);
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w1_write_byte(dev, W1_F2D_READ_EEPROM);
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w1_write_byte(dev, offset & 0xff);
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w1_write_byte(dev, offset >> 8);
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w1_read_buf(dev, buf, count);
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/*
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* even if read buf from w1 fails, return success as we hardcoded
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* the buffer.
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*/
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return 0;
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}
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static const struct w1_eeprom_ops eep_sandbox_ops = {
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.read_buf = eep_sandbox_read_buf,
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};
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static const struct udevice_id eep_sandbox_id[] = {
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{ .compatible = "sandbox,w1-eeprom", .data = W1_FAMILY_EEP_SANDBOX },
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{ },
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};
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U_BOOT_DRIVER(eep_sandbox) = {
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.name = "eep_sandbox",
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.id = UCLASS_W1_EEPROM,
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.of_match = eep_sandbox_id,
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.ops = &eep_sandbox_ops,
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};
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