2 * Copyright (C) 2013 Gateworks Corporation
4 * Author: Tim Harvey <tharvey@gateworks.com>
6 * SPDX-License-Identifier: GPL-2.0+
12 #include <linux/ctype.h>
17 * The Gateworks System Controller will fail to ACK a master transaction if
18 * it is busy, which can occur during its 1HZ timer tick while reading ADC's.
19 * When this does occur, it will never be busy long enough to fail more than
20 * 2 back-to-back transfers. Thus we wrap i2c_read and i2c_write with
23 int gsc_i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len)
30 ret = i2c_read(chip, addr, alen, buf, len);
33 debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr,
42 int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len)
49 ret = i2c_write(chip, addr, alen, buf, len);
52 debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr,
63 static void read_hwmon(const char *name, uint reg, uint size)
68 printf("%-8s:", name);
69 memset(buf, 0, sizeof(buf));
70 if (gsc_i2c_read(GSC_HWMON_ADDR, reg, 1, buf, size)) {
73 ui = buf[0] | (buf[1]<<8) | (buf[2]<<16);
81 int do_gsc(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
83 const char *model = getenv("model");
86 read_hwmon("Temp", GSC_HWMON_TEMP, 2);
87 read_hwmon("VIN", GSC_HWMON_VIN, 3);
88 read_hwmon("VBATT", GSC_HWMON_VBATT, 3);
89 read_hwmon("VDD_3P3", GSC_HWMON_VDD_3P3, 3);
90 read_hwmon("VDD_ARM", GSC_HWMON_VDD_CORE, 3);
91 read_hwmon("VDD_SOC", GSC_HWMON_VDD_SOC, 3);
92 read_hwmon("VDD_HIGH", GSC_HWMON_VDD_HIGH, 3);
93 read_hwmon("VDD_DDR", GSC_HWMON_VDD_DDR, 3);
94 read_hwmon("VDD_5P0", GSC_HWMON_VDD_5P0, 3);
95 read_hwmon("VDD_2P5", GSC_HWMON_VDD_2P5, 3);
96 read_hwmon("VDD_1P8", GSC_HWMON_VDD_1P8, 3);
97 read_hwmon("VDD_IO2", GSC_HWMON_VDD_IO2, 3);
99 case '1': /* GW51xx */
100 read_hwmon("VDD_IO3", GSC_HWMON_VDD_IO4, 3); /* -C rev */
102 case '2': /* GW52xx */
104 case '3': /* GW53xx */
105 read_hwmon("VDD_IO4", GSC_HWMON_VDD_IO4, 3); /* -C rev */
106 read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3);
108 case '4': /* GW54xx */
109 read_hwmon("VDD_IO3", GSC_HWMON_VDD_IO4, 3); /* -C rev */
110 read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3);
112 case '5': /* GW55xx */
118 U_BOOT_CMD(gsc, 1, 1, do_gsc,
123 #endif /* CONFIG_CMD_GSC */