mirror of
https://github.com/AsahiLinux/u-boot
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d4505c8e0d
Up till now it was only possible to use 'pmic' command with a single byte transmission. The pmic_read|write functions has been replaced with ones, which don't need the transmission length as a parameter. Due to that it is possible now to read data from PMICs transmitting more data than 1 byte at once (e.g. mc34708) Signed-off-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
216 lines
4.5 KiB
C
216 lines
4.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2014-2015 Samsung Electronics
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* Przemyslaw Marczak <p.marczak@samsung.com>
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*/
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#include <common.h>
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#include <errno.h>
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#include <dm.h>
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#include <dm/uclass-internal.h>
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#include <power/pmic.h>
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#define LIMIT_DEV 32
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#define LIMIT_PARENT 20
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static struct udevice *currdev;
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static int failure(int ret)
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{
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printf("Error: %d (%s)\n", ret, errno_str(ret));
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return CMD_RET_FAILURE;
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}
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static int do_dev(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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char *name;
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int ret = -ENODEV;
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switch (argc) {
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case 2:
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name = argv[1];
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ret = pmic_get(name, &currdev);
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if (ret) {
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printf("Can't get PMIC: %s!\n", name);
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return failure(ret);
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}
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case 1:
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if (!currdev) {
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printf("PMIC device is not set!\n\n");
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return CMD_RET_USAGE;
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}
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printf("dev: %d @ %s\n", currdev->seq, currdev->name);
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}
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return CMD_RET_SUCCESS;
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}
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static int do_list(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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struct udevice *dev;
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int ret;
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printf("| %-*.*s| %-*.*s| %s @ %s\n",
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LIMIT_DEV, LIMIT_DEV, "Name",
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LIMIT_PARENT, LIMIT_PARENT, "Parent name",
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"Parent uclass", "seq");
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for (ret = uclass_first_device(UCLASS_PMIC, &dev); dev;
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ret = uclass_next_device(&dev)) {
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if (ret)
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continue;
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printf("| %-*.*s| %-*.*s| %s @ %d\n",
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LIMIT_DEV, LIMIT_DEV, dev->name,
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LIMIT_PARENT, LIMIT_PARENT, dev->parent->name,
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dev_get_uclass_name(dev->parent), dev->parent->seq);
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}
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if (ret)
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return CMD_RET_FAILURE;
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return CMD_RET_SUCCESS;
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}
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static int do_dump(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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struct uc_pmic_priv *priv;
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struct udevice *dev;
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char fmt[16];
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uint reg;
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int ret;
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if (!currdev) {
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printf("First, set the PMIC device!\n");
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return CMD_RET_USAGE;
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}
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dev = currdev;
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priv = dev_get_uclass_priv(dev);
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printf("Dump pmic: %s registers\n", dev->name);
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sprintf(fmt, "%%%d.%dx ", priv->trans_len * 2,
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priv->trans_len * 2);
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for (reg = 0; reg < pmic_reg_count(dev); reg++) {
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ret = pmic_reg_read(dev, reg);
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if (ret < 0) {
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printf("Can't read register: %d\n", reg);
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return failure(ret);
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}
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if (!(reg % 16))
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printf("\n0x%02x: ", reg);
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printf(fmt, ret);
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}
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printf("\n");
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return CMD_RET_SUCCESS;
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}
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static int do_read(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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struct uc_pmic_priv *priv;
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struct udevice *dev;
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int regs, ret;
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char fmt[24];
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uint reg;
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if (!currdev) {
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printf("First, set the PMIC device!\n");
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return CMD_RET_USAGE;
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}
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dev = currdev;
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priv = dev_get_uclass_priv(dev);
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if (argc != 2)
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return CMD_RET_USAGE;
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reg = simple_strtoul(argv[1], NULL, 0);
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regs = pmic_reg_count(dev);
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if (reg > regs) {
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printf("PMIC max reg: %d\n", regs);
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return failure(-EFAULT);
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}
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ret = pmic_reg_read(dev, reg);
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if (ret < 0) {
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printf("Can't read PMIC register: %d!\n", reg);
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return failure(ret);
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}
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sprintf(fmt, "0x%%02x: 0x%%%d.%dx\n", priv->trans_len * 2,
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priv->trans_len * 2);
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printf(fmt, reg, ret);
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return CMD_RET_SUCCESS;
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}
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static int do_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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struct udevice *dev;
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uint reg, value;
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int regs, ret;
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if (!currdev) {
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printf("First, set the PMIC device!\n");
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return CMD_RET_USAGE;
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}
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dev = currdev;
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if (argc != 3)
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return CMD_RET_USAGE;
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reg = simple_strtoul(argv[1], NULL, 0);
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regs = pmic_reg_count(dev);
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if (reg > regs) {
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printf("PMIC max reg: %d\n", regs);
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return failure(-EFAULT);
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}
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value = simple_strtoul(argv[2], NULL, 0);
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ret = pmic_reg_write(dev, reg, value);
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if (ret) {
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printf("Can't write PMIC register: %d!\n", reg);
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return failure(ret);
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}
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return CMD_RET_SUCCESS;
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}
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static cmd_tbl_t subcmd[] = {
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U_BOOT_CMD_MKENT(dev, 2, 1, do_dev, "", ""),
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U_BOOT_CMD_MKENT(list, 1, 1, do_list, "", ""),
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U_BOOT_CMD_MKENT(dump, 1, 1, do_dump, "", ""),
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U_BOOT_CMD_MKENT(read, 2, 1, do_read, "", ""),
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U_BOOT_CMD_MKENT(write, 3, 1, do_write, "", ""),
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};
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static int do_pmic(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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cmd_tbl_t *cmd;
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argc--;
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argv++;
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cmd = find_cmd_tbl(argv[0], subcmd, ARRAY_SIZE(subcmd));
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if (cmd == NULL || argc > cmd->maxargs)
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return CMD_RET_USAGE;
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return cmd->cmd(cmdtp, flag, argc, argv);
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}
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U_BOOT_CMD(pmic, CONFIG_SYS_MAXARGS, 1, do_pmic,
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"PMIC sub-system",
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"list - list pmic devices\n"
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"pmic dev [name] - show or [set] operating PMIC device\n"
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"pmic dump - dump registers\n"
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"pmic read address - read byte of register at address\n"
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"pmic write address - write byte to register at address\n"
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);
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