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>
16 #define MINMAX(n, percent) ((n)*(100-percent)/100), ((n)*(100+percent)/100)
19 * The Gateworks System Controller will fail to ACK a master transaction if
20 * it is busy, which can occur during its 1HZ timer tick while reading ADC's.
21 * When this does occur, it will never be busy long enough to fail more than
22 * 2 back-to-back transfers. Thus we wrap i2c_read and i2c_write with
25 int gsc_i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len)
32 ret = i2c_read(chip, addr, alen, buf, len);
35 debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr,
44 int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len)
51 ret = i2c_write(chip, addr, alen, buf, len);
54 debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr,
65 static void read_hwmon(const char *name, uint reg, uint size, uint low,
71 printf("%-8s:", name);
72 memset(buf, 0, sizeof(buf));
73 if (gsc_i2c_read(GSC_HWMON_ADDR, reg, 1, buf, size)) {
76 ui = buf[0] | (buf[1]<<8) | (buf[2]<<16);
80 printf("%d Failed - Low", ui);
82 printf("%d Failed - High", ui);
89 int do_gsc(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
91 const char *model = getenv("model");
94 read_hwmon("Temp", GSC_HWMON_TEMP, 2, 0, 9000);
95 read_hwmon("VIN", GSC_HWMON_VIN, 3, 8000, 60000);
96 read_hwmon("VBATT", GSC_HWMON_VBATT, 3, 1800, 3500);
97 read_hwmon("VDD_3P3", GSC_HWMON_VDD_3P3, 3, MINMAX(3300, 10));
98 read_hwmon("VDD_HIGH", GSC_HWMON_VDD_HIGH, 3, MINMAX(3000, 10));
99 read_hwmon("VDD_DDR", GSC_HWMON_VDD_DDR, 3, MINMAX(1500, 10));
100 read_hwmon("VDD_5P0", GSC_HWMON_VDD_5P0, 3, MINMAX(5000, 10));
101 read_hwmon("VDD_2P5", GSC_HWMON_VDD_2P5, 3, MINMAX(2500, 10));
102 read_hwmon("VDD_1P8", GSC_HWMON_VDD_1P8, 3, MINMAX(1800, 10));
105 case '1': /* GW51xx */
106 read_hwmon("VDD_CORE", GSC_HWMON_VDD_CORE, 3, MINMAX(1175, 10));
107 read_hwmon("VDD_SOC", GSC_HWMON_VDD_SOC, 3, MINMAX(1175, 10));
109 case '2': /* GW52xx */
110 case '3': /* GW53xx */
111 read_hwmon("VDD_CORE", GSC_HWMON_VDD_CORE, 3, MINMAX(1175, 10));
112 read_hwmon("VDD_SOC", GSC_HWMON_VDD_SOC, 3, MINMAX(1175, 10));
113 read_hwmon("VDD_1P0", GSC_HWMON_VDD_1P0, 3, MINMAX(1000, 10));
115 case '4': /* GW54xx */
116 read_hwmon("VDD_CORE", GSC_HWMON_VDD_CORE, 3, MINMAX(1375, 10));
117 read_hwmon("VDD_SOC", GSC_HWMON_VDD_SOC, 3, MINMAX(1375, 10));
118 read_hwmon("VDD_1P0", GSC_HWMON_VDD_1P0, 3, MINMAX(1000, 10));
120 case '5': /* GW55xx */
121 read_hwmon("VDD_CORE", GSC_HWMON_VDD_CORE, 3, MINMAX(1175, 10));
122 read_hwmon("VDD_SOC", GSC_HWMON_VDD_SOC, 3, MINMAX(1175, 10));
128 U_BOOT_CMD(gsc, 1, 1, do_gsc,
133 #endif /* CONFIG_CMD_GSC */