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eae745379d
Lack of this check resulted in a data abort when CPU tried to execute the following command (without further mandatory input): 'pmic MAX77686_PMIC'. Only the 'pmic list' command requires one passed parameter. Other require at least two valid parameters for correct operation. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
223 lines
4.1 KiB
C
223 lines
4.1 KiB
C
/*
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* Copyright (C) 2011 Samsung Electronics
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* Lukasz Majewski <l.majewski@samsung.com>
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*
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* (C) Copyright 2010
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* Stefano Babic, DENX Software Engineering, sbabic@denx.de
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*
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* (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <malloc.h>
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#include <linux/types.h>
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#include <linux/list.h>
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#include <power/pmic.h>
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static LIST_HEAD(pmic_list);
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int check_reg(struct pmic *p, u32 reg)
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{
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if (reg >= p->number_of_regs) {
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printf("<reg num> = %d is invalid. Should be less than %d\n",
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reg, p->number_of_regs);
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return -1;
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}
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return 0;
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}
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int pmic_set_output(struct pmic *p, u32 reg, int out, int on)
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{
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u32 val;
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if (pmic_reg_read(p, reg, &val))
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return -1;
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if (on)
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val |= out;
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else
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val &= ~out;
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if (pmic_reg_write(p, reg, val))
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return -1;
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return 0;
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}
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static void pmic_show_info(struct pmic *p)
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{
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printf("PMIC: %s\n", p->name);
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}
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static int pmic_dump(struct pmic *p)
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{
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int i, ret;
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u32 val;
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if (!p) {
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puts("Wrong PMIC name!\n");
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return -1;
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}
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pmic_show_info(p);
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for (i = 0; i < p->number_of_regs; i++) {
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ret = pmic_reg_read(p, i, &val);
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if (ret)
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puts("PMIC: Registers dump failed\n");
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if (!(i % 8))
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printf("\n0x%02x: ", i);
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printf("%08x ", val);
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}
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puts("\n");
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return 0;
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}
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struct pmic *pmic_alloc(void)
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{
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struct pmic *p;
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p = calloc(sizeof(*p), 1);
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if (!p) {
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printf("%s: No available memory for allocation!\n", __func__);
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return NULL;
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}
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list_add_tail(&p->list, &pmic_list);
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debug("%s: new pmic struct: 0x%p\n", __func__, p);
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return p;
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}
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struct pmic *pmic_get(const char *s)
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{
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struct pmic *p;
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list_for_each_entry(p, &pmic_list, list) {
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if (strcmp(p->name, s) == 0) {
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debug("%s: pmic %s -> 0x%p\n", __func__, p->name, p);
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return p;
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}
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}
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return NULL;
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}
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const char *power_get_interface(int interface)
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{
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const char *power_interface[] = {"I2C", "SPI", "|+|-|"};
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return power_interface[interface];
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}
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static void pmic_list_names(void)
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{
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struct pmic *p;
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puts("PMIC devices:\n");
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list_for_each_entry(p, &pmic_list, list) {
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printf("name: %s bus: %s_%d\n", p->name,
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power_get_interface(p->interface), p->bus);
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}
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}
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int do_pmic(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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u32 ret, reg, val;
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char *cmd, *name;
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struct pmic *p;
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/* at least two arguments please */
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if (argc < 2)
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return CMD_RET_USAGE;
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if (strcmp(argv[1], "list") == 0) {
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pmic_list_names();
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return CMD_RET_SUCCESS;
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}
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if (argc < 3)
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return CMD_RET_USAGE;
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name = argv[1];
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cmd = argv[2];
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debug("%s: name: %s cmd: %s\n", __func__, name, cmd);
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p = pmic_get(name);
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if (!p)
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return CMD_RET_FAILURE;
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if (strcmp(cmd, "dump") == 0) {
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if (pmic_dump(p))
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return CMD_RET_FAILURE;
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return CMD_RET_SUCCESS;
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}
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if (strcmp(cmd, "read") == 0) {
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if (argc < 4)
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return CMD_RET_USAGE;
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reg = simple_strtoul(argv[3], NULL, 16);
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ret = pmic_reg_read(p, reg, &val);
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if (ret)
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puts("PMIC: Register read failed\n");
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printf("\n0x%02x: 0x%08x\n", reg, val);
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return CMD_RET_SUCCESS;
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}
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if (strcmp(cmd, "write") == 0) {
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if (argc < 5)
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return CMD_RET_USAGE;
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reg = simple_strtoul(argv[3], NULL, 16);
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val = simple_strtoul(argv[4], NULL, 16);
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pmic_reg_write(p, reg, val);
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return CMD_RET_SUCCESS;
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}
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if (strcmp(cmd, "bat") == 0) {
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if (argc < 4)
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return CMD_RET_USAGE;
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if (!p->pbat) {
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printf("%s is not a battery\n", p->name);
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return CMD_RET_FAILURE;
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}
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if (strcmp(argv[3], "state") == 0)
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p->fg->fg_battery_check(p->pbat->fg, p);
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if (strcmp(argv[3], "charge") == 0) {
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printf("BAT: %s charging (ctrl+c to break)\n",
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p->name);
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if (p->low_power_mode)
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p->low_power_mode();
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if (p->pbat->battery_charge)
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p->pbat->battery_charge(p);
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}
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return CMD_RET_SUCCESS;
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}
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/* No subcommand found */
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return CMD_RET_SUCCESS;
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}
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U_BOOT_CMD(
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pmic, CONFIG_SYS_MAXARGS, 1, do_pmic,
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"PMIC",
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"list - list available PMICs\n"
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"pmic name dump - dump named PMIC registers\n"
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"pmic name read <reg> - read register\n"
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"pmic name write <reg> <value> - write register\n"
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"pmic name bat state - write register\n"
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"pmic name bat charge - write register\n"
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);
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