1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2015 Samsung Electronics
4 * Przemyslaw Marczak <p.marczak@samsung.com>
12 #include <power/pmic.h>
13 #include <power/regulator.h>
14 #include <power/s2mps11.h>
15 #include <samsung/exynos5-dt-types.h>
16 #include <samsung/misc.h>
18 DECLARE_GLOBAL_DATA_PTR;
20 static const struct udevice_id board_ids[] = {
21 { .compatible = "samsung,odroidxu3", .data = EXYNOS5_BOARD_ODROID_XU3 },
22 { .compatible = "samsung,exynos5", .data = EXYNOS5_BOARD_GENERIC },
27 * Odroix XU3/XU4/HC1/HC2 board revisions (from HC1+_HC2_MAIN_REV0.1_20171017.pdf):
30 * 0.2 372 XU3 0.2 | XU3L - no DISPLAYPORT (probe I2C0:0x40 / INA231)
33 * 0.5 1016 XU4+Air0.1 (Passive cooling)
34 * 0.6 1309 XU4-HC1 0.1
35 * 0.7 1470 XU4-HC1+ 0.1 (HC2)
36 * Use +1% for ADC value tolerance in the array below, the code loops until
37 * the measured ADC value is lower than then ADCmax from the array.
39 struct odroid_rev_info odroid_info[] = {
40 { EXYNOS5_BOARD_ODROID_XU3_REV01, 1, 10, "xu3" },
41 { EXYNOS5_BOARD_ODROID_XU3_REV02, 2, 375, "xu3" },
42 { EXYNOS5_BOARD_ODROID_XU4_REV01, 1, 1293, "xu4" },
43 { EXYNOS5_BOARD_ODROID_HC1_REV01, 1, 1322, "hc1" },
44 { EXYNOS5_BOARD_ODROID_HC2_REV01, 1, 1484, "hc1" },
45 { EXYNOS5_BOARD_ODROID_UNKNOWN, 0, 4095, "unknown" },
48 static unsigned int odroid_get_rev(void)
52 for (i = 0; i < ARRAY_SIZE(odroid_info); i++) {
53 if (odroid_info[i].board_type == gd->board_type)
54 return odroid_info[i].board_rev;
60 static int odroid_get_board_type(void)
65 ret = adc_channel_single_shot("adc", CONFIG_ODROID_REV_AIN, &adcval);
69 for (i = 0; i < ARRAY_SIZE(odroid_info); i++) {
70 /* ADC tolerance: +1% */
71 if (adcval < odroid_info[i].adc_val)
72 return odroid_info[i].board_type;
76 return EXYNOS5_BOARD_ODROID_XU3;
80 * odroid_get_type_str - returns pointer to one of the board type string.
81 * Board types: "xu3", "xu3-lite", "xu4". However the "xu3lite" can be
82 * detected only when the i2c controller is ready to use. Fortunately,
83 * XU3 and XU3L are compatible, and the information about board lite
84 * revision is needed before booting the linux, to set proper environment
87 static const char *odroid_get_type_str(void)
89 const char *type_xu3l = "xu3-lite";
90 struct udevice *dev, *chip;
93 if (gd->board_type != EXYNOS5_BOARD_ODROID_XU3_REV02)
96 ret = pmic_get("s2mps11", &dev);
100 /* Enable LDO26: 3.0V */
101 ret = pmic_reg_write(dev, S2MPS11_REG_L26CTRL,
102 S2MPS11_LDO26_ENABLE);
106 /* Check XU3Lite by probe INA231 I2C0:0x40 */
107 ret = uclass_get_device(UCLASS_I2C, 0, &dev);
111 ret = dm_i2c_probe(dev, 0x40, 0x0, &chip);
116 for (i = 0; i < ARRAY_SIZE(odroid_info); i++) {
117 if (odroid_info[i].board_type == gd->board_type)
118 return odroid_info[i].name;
124 bool board_is_odroidxu3(void)
126 if (gd->board_type >= EXYNOS5_BOARD_ODROID_XU3 &&
127 gd->board_type <= EXYNOS5_BOARD_ODROID_XU3_REV02)
133 bool board_is_odroidxu4(void)
135 if (gd->board_type == EXYNOS5_BOARD_ODROID_XU4_REV01)
141 bool board_is_odroidhc1(void)
143 if (gd->board_type == EXYNOS5_BOARD_ODROID_HC1_REV01)
149 bool board_is_odroidhc2(void)
151 if (gd->board_type == EXYNOS5_BOARD_ODROID_HC2_REV01)
157 bool board_is_generic(void)
159 if (gd->board_type == EXYNOS5_BOARD_GENERIC)
166 * get_board_rev() - return detected board revision.
168 * @return: return board revision number for XU3 or 0 for generic
170 u32 get_board_rev(void)
172 if (board_is_generic())
175 return odroid_get_rev();
179 * get_board_type() - returns board type string.
181 * @return: return board type string for XU3 or empty string for generic
183 const char *get_board_type(void)
185 const char *generic = "";
187 if (board_is_generic())
190 return odroid_get_type_str();
194 * set_board_type() - set board type in gd->board_type.
195 * As default type set EXYNOS5_BOARD_GENERIC. If Odroid is detected,
196 * set its proper type based on device tree.
198 * This might be called early when some more specific ways to detect revision
199 * are not yet available.
201 void set_board_type(void)
203 const struct udevice_id *of_match = board_ids;
206 gd->board_type = EXYNOS5_BOARD_GENERIC;
208 while (of_match->compatible) {
209 ret = fdt_node_check_compatible(gd->fdt_blob, 0,
210 of_match->compatible);
214 gd->board_type = of_match->data;
220 * set_board_revision() - set detailed board type in gd->board_type.
221 * Should be called when resources (e.g. regulators) are available
222 * so ADC can be used to detect the specific revision of a board.
224 void set_board_revision(void)
226 if (board_is_odroidxu3())
227 gd->board_type = odroid_get_board_type();