2 * Copyright (C) 2015 Samsung Electronics
3 * Przemyslaw Marczak <p.marczak@samsung.com>
5 * SPDX-License-Identifier: GPL-2.0+
13 #include <power/pmic.h>
14 #include <power/regulator.h>
15 #include <power/s2mps11.h>
16 #include <samsung/exynos5-dt-types.h>
17 #include <samsung/misc.h>
19 DECLARE_GLOBAL_DATA_PTR;
21 static const struct udevice_id board_ids[] = {
22 { .compatible = "samsung,odroidxu3", .data = EXYNOS5_BOARD_ODROID_XU3 },
23 { .compatible = "samsung,exynos5", .data = EXYNOS5_BOARD_GENERIC },
28 * Odroix XU3/4 board revisions:
31 * 0.2 410 XU3 0.2 | XU3L - no DISPLAYPORT (probe I2C0:0x40 / INA231)
33 * Use +10 % for ADC value tolerance.
35 struct odroid_rev_info odroid_info[] = {
36 { EXYNOS5_BOARD_ODROID_XU3_REV01, 1, 10, "xu3" },
37 { EXYNOS5_BOARD_ODROID_XU3_REV02, 2, 410, "xu3" },
38 { EXYNOS5_BOARD_ODROID_XU4_REV01, 1, 1408, "xu4" },
39 { EXYNOS5_BOARD_ODROID_UNKNOWN, 0, 4095, "unknown" },
42 static unsigned int odroid_get_rev(void)
46 for (i = 0; i < ARRAY_SIZE(odroid_info); i++) {
47 if (odroid_info[i].board_type == gd->board_type)
48 return odroid_info[i].board_rev;
54 static int odroid_get_board_type(void)
59 ret = adc_channel_single_shot("adc", CONFIG_ODROID_REV_AIN, &adcval);
63 for (i = 0; i < ARRAY_SIZE(odroid_info); i++) {
64 /* ADC tolerance: +20 % */
65 if (adcval < odroid_info[i].adc_val)
66 return odroid_info[i].board_type;
70 return EXYNOS5_BOARD_ODROID_XU3;
74 * odroid_get_type_str - returns pointer to one of the board type string.
75 * Board types: "xu3", "xu3-lite", "xu4". However the "xu3lite" can be
76 * detected only when the i2c controller is ready to use. Fortunately,
77 * XU3 and XU3L are compatible, and the information about board lite
78 * revision is needed before booting the linux, to set proper environment
81 static const char *odroid_get_type_str(void)
83 const char *type_xu3l = "xu3-lite";
84 struct udevice *dev, *chip;
87 if (gd->board_type != EXYNOS5_BOARD_ODROID_XU3_REV02)
90 ret = pmic_get("s2mps11", &dev);
94 /* Enable LDO26: 3.0V */
95 ret = pmic_reg_write(dev, S2MPS11_REG_L26CTRL,
96 S2MPS11_LDO26_ENABLE);
100 /* Check XU3Lite by probe INA231 I2C0:0x40 */
101 ret = uclass_get_device(UCLASS_I2C, 0, &dev);
105 ret = dm_i2c_probe(dev, 0x40, 0x0, &chip);
110 for (i = 0; i < ARRAY_SIZE(odroid_info); i++) {
111 if (odroid_info[i].board_type == gd->board_type)
112 return odroid_info[i].name;
118 bool board_is_odroidxu3(void)
120 if (gd->board_type >= EXYNOS5_BOARD_ODROID_XU3 &&
121 gd->board_type <= EXYNOS5_BOARD_ODROID_XU3_REV02)
127 bool board_is_odroidxu4(void)
129 if (gd->board_type == EXYNOS5_BOARD_ODROID_XU4_REV01)
135 bool board_is_generic(void)
137 if (gd->board_type == EXYNOS5_BOARD_GENERIC)
144 * get_board_rev() - return detected board revision.
146 * @return: return board revision number for XU3 or 0 for generic
148 u32 get_board_rev(void)
150 if (board_is_generic())
153 return odroid_get_rev();
157 * get_board_type() - returns board type string.
159 * @return: return board type string for XU3 or empty string for generic
161 const char *get_board_type(void)
163 const char *generic = "";
165 if (board_is_generic())
168 return odroid_get_type_str();
172 * set_board_type() - set board type in gd->board_type.
173 * As default type set EXYNOS5_BOARD_GENERIC, if detect Odroid,
174 * then set its proper type.
176 void set_board_type(void)
178 const struct udevice_id *of_match = board_ids;
181 gd->board_type = EXYNOS5_BOARD_GENERIC;
183 while (of_match->compatible) {
184 ret = fdt_node_check_compatible(gd->fdt_blob, 0,
185 of_match->compatible);
189 gd->board_type = of_match->data;
193 /* If Odroid, then check its revision */
194 if (board_is_odroidxu3())
195 gd->board_type = odroid_get_board_type();