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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 commit c8ffd1356d42223cbb8c86280a083cc3c93e6426, reversing changes made to 2ee6f3a5f7550de3599faef9704e166e5dcace35. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
128 lines
2.7 KiB
C
128 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+
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*
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* (C) Copyright 2018
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* Microchip Technology, Inc.
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* Eugen Hristev <eugen.hristev@microchip.com>
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*/
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#include <common.h>
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#include <command.h>
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#include <dm.h>
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#include <w1.h>
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#include <w1-eeprom.h>
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#include <dm/device-internal.h>
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static int w1_bus(void)
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{
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struct udevice *bus, *dev;
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int ret;
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ret = w1_get_bus(0, &bus);
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if (ret) {
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printf("one wire interface not found\n");
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return CMD_RET_FAILURE;
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}
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printf("Bus %d:\t%s", dev_seq(bus), bus->name);
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if (device_active(bus))
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printf(" (active)");
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printf("\n");
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for (device_find_first_child(bus, &dev);
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dev;
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device_find_next_child(&dev)) {
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ret = device_probe(dev);
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printf("\t%s (%d) uclass %s : ", dev->name, dev_seq(dev),
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dev->uclass->uc_drv->name);
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if (ret)
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printf("device error\n");
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else
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printf("family 0x%x\n", w1_get_device_family(dev));
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}
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return CMD_RET_SUCCESS;
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}
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static int w1_read(int argc, char *const argv[])
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{
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int bus_n = 0, dev_n = 0, offset = 0, len = 512;
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int i;
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struct udevice *bus, *dev;
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int ret;
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u8 buf[512];
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if (argc > 2)
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bus_n = dectoul(argv[2], NULL);
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if (argc > 3)
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dev_n = dectoul(argv[3], NULL);
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if (argc > 4)
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offset = dectoul(argv[4], NULL);
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if (argc > 5)
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len = dectoul(argv[5], NULL);
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if (len > 512) {
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printf("len needs to be <= 512\n");
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return CMD_RET_FAILURE;
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}
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ret = w1_get_bus(bus_n, &bus);
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if (ret) {
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printf("one wire interface not found\n");
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return CMD_RET_FAILURE;
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}
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for (device_find_first_child(bus, &dev), i = 0;
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dev && i <= dev_n;
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device_find_next_child(&dev), i++) {
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ret = device_probe(dev);
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if (!ret && i == dev_n)
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break;
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}
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if (i != dev_n || ret || !dev) {
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printf("invalid dev\n");
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return CMD_RET_FAILURE;
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}
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if (strcmp(dev->uclass->uc_drv->name, "w1_eeprom")) {
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printf("the device present on the interface is of unknown device class\n");
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return CMD_RET_FAILURE;
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}
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ret = w1_eeprom_read_buf(dev, offset, (u8 *)buf, len);
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if (ret) {
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printf("error reading device %s\n", dev->name);
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return CMD_RET_FAILURE;
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}
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for (i = 0; i < len; i++)
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printf("%x", buf[i]);
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printf("\n");
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return CMD_RET_SUCCESS;
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}
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int do_w1(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
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{
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if (argc < 2)
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return CMD_RET_USAGE;
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if (!strcmp(argv[1], "bus"))
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return w1_bus();
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if (!strcmp(argv[1], "read"))
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return w1_read(argc, argv);
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return CMD_RET_SUCCESS;
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}
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U_BOOT_CMD(w1, 6, 0, do_w1,
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"onewire interface utility commands",
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"bus - show onewire bus info (all)\n"
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"w1 read [<bus> [<dev> [offset [length]]]]"
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" - read from onewire device 'dev' on onewire bus 'bus'"
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" starting from offset 'offset' and length 'length'\n"
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" defaults: bus 0, dev 0, offset 0, length 512 bytes.");
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