+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Samsung Electronics
* Przemyslaw Marczak <p.marczak@samsung.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
+#include <linux/delay.h>
#include <power/pmic.h>
#include <power/regulator.h>
#include <power/s2mps11.h>
};
/**
- * Odroix XU3/4 board revisions:
+ * Odroix XU3/XU4/HC1/HC2 board revisions (from HC1+_HC2_MAIN_REV0.1_20171017.pdf):
* Rev ADCmax Board
* 0.1 0 XU3 0.1
- * 0.2 410 XU3 0.2 | XU3L - no DISPLAYPORT (probe I2C0:0x40 / INA231)
- * 0.3 1408 XU4 0.1
- * Use +10 % for ADC value tolerance.
+ * 0.2 372 XU3 0.2 | XU3L - no DISPLAYPORT (probe I2C0:0x40 / INA231)
+ * 0.3 1280 XU4 0.1
+ * 0.4 739 XU4 0.2
+ * 0.5 1016 XU4+Air0.1 (Passive cooling)
+ * 0.6 1309 XU4-HC1 0.1
+ * 0.7 1470 XU4-HC1+ 0.1 (HC2)
+ * Use +1% for ADC value tolerance in the array below, the code loops until
+ * the measured ADC value is lower than then ADCmax from the array.
*/
struct odroid_rev_info odroid_info[] = {
{ EXYNOS5_BOARD_ODROID_XU3_REV01, 1, 10, "xu3" },
- { EXYNOS5_BOARD_ODROID_XU3_REV02, 2, 410, "xu3" },
- { EXYNOS5_BOARD_ODROID_XU4_REV01, 1, 1408, "xu4" },
+ { EXYNOS5_BOARD_ODROID_XU3_REV02, 2, 375, "xu3" },
+ { EXYNOS5_BOARD_ODROID_XU4_REV01, 1, 1293, "xu4" },
+ { EXYNOS5_BOARD_ODROID_HC1_REV01, 1, 1322, "hc1" },
+ { EXYNOS5_BOARD_ODROID_HC2_REV01, 1, 1484, "hc1" },
{ EXYNOS5_BOARD_ODROID_UNKNOWN, 0, 4095, "unknown" },
};
return 0;
}
+/*
+ * Read ADC at least twice and check the resuls. If regulator providing voltage
+ * on to measured point was just turned on, first reads might require time
+ * to stabilize.
+ */
+static int odroid_get_adc_val(unsigned int *adcval)
+{
+ unsigned int adcval_prev = 0;
+ int ret, retries = 20;
+
+ ret = adc_channel_single_shot("adc@12D10000", CONFIG_ODROID_REV_AIN,
+ &adcval_prev);
+ if (ret)
+ return ret;
+
+ while (retries--) {
+ mdelay(5);
+
+ ret = adc_channel_single_shot("adc@12D10000",
+ CONFIG_ODROID_REV_AIN, adcval);
+ if (ret)
+ return ret;
+
+ /*
+ * If difference between ADC reads is less than 3%,
+ * accept the result
+ */
+ if ((100 * abs(*adcval - adcval_prev) / adcval_prev) < 3)
+ return ret;
+
+ adcval_prev = *adcval;
+ }
+
+ return ret;
+}
+
static int odroid_get_board_type(void)
{
unsigned int adcval;
int ret, i;
- ret = adc_channel_single_shot("adc", CONFIG_ODROID_REV_AIN, &adcval);
+ ret = odroid_get_adc_val(&adcval);
if (ret)
goto rev_default;
for (i = 0; i < ARRAY_SIZE(odroid_info); i++) {
- /* ADC tolerance: +20 % */
+ /* ADC tolerance: +1% */
if (adcval < odroid_info[i].adc_val)
return odroid_info[i].board_type;
}
if (gd->board_type != EXYNOS5_BOARD_ODROID_XU3_REV02)
goto exit;
- ret = pmic_get("s2mps11", &dev);
+ ret = pmic_get("s2mps11_pmic@66", &dev);
if (ret)
goto exit;
return false;
}
+bool board_is_odroidhc1(void)
+{
+ if (gd->board_type == EXYNOS5_BOARD_ODROID_HC1_REV01)
+ return true;
+
+ return false;
+}
+
+bool board_is_odroidhc2(void)
+{
+ if (gd->board_type == EXYNOS5_BOARD_ODROID_HC2_REV01)
+ return true;
+
+ return false;
+}
+
bool board_is_generic(void)
{
if (gd->board_type == EXYNOS5_BOARD_GENERIC)
/**
* set_board_type() - set board type in gd->board_type.
- * As default type set EXYNOS5_BOARD_GENERIC, if detect Odroid,
- * then set its proper type.
+ * As default type set EXYNOS5_BOARD_GENERIC. If Odroid is detected,
+ * set its proper type based on device tree.
+ *
+ * This might be called early when some more specific ways to detect revision
+ * are not yet available.
*/
void set_board_type(void)
{
gd->board_type = of_match->data;
break;
}
+}
- /* If Odroid, then check its revision */
+/**
+ * set_board_revision() - set detailed board type in gd->board_type.
+ * Should be called when resources (e.g. regulators) are available
+ * so ADC can be used to detect the specific revision of a board.
+ */
+void set_board_revision(void)
+{
if (board_is_odroidxu3())
gd->board_type = odroid_get_board_type();
}