hw21/26: optimize extension module powerup

fixes 69e9c386dd

board/nm/common/da9063.h

@@ -23,6 +23,7 @@
 #define PMIC_FAULT_POR_MASK		0x02	/* Startup from No-Power/RTC/Delivery mode */
 
 #define PMIC_REG_EVENT_A		0x06
+#define PMIC_REG_EVENT_ONKEY_MASK	0x01
 #define PMIC_REG_EVENT_RTC_ALARM_MASK	0x02
 #define PMIC_REG_EVENT_RTC_TICK_MASK	0x04
 #define PMIC_REG_EVENT_EVENTS_B_MASK	0x20
@@ -30,6 +31,11 @@
 #define PMIC_REG_EVENT_B		0x07
 #define PMIC_REG_EVENT_COMP1V2_MASK	0x04
 
+#define PMIC_REG_IRQ_MASK_A	0x0A
+#define PMIC_REG_IRQ_MASK_B	0x0B
+#define PMIC_REG_IRQ_MASK_C	0x0C
+#define PMIC_REG_IRQ_MASK_D	0x0D
+
 #define PMIC_REG_CONTROL_A      0x0E    /* Control register for power states */
 #define PMIC_REG_CONTROL_D	0x11    /* Control register for blink/watchdog */
 #define PMIC_REG_GPIO14_15	0x1C    /* Configuration of GPIO14/15 (mode, wake) */
@@ -51,6 +57,7 @@
 #define PMIC_LDOx_CONF_MASK	0x80
 
 #define PMIC_REG_ID_4_3		0x84
+#define PMIC_REG_ID_6_5		0x85
 
 #define PMIC_REG_BUCK_ILIM_A	0x9A
 #define PMIC_REG_BUCK_ILIM_B	0x9B
@@ -77,6 +84,7 @@
 #define PMIC_REG_TRIM_CLDR	0x120	/* Calendar Trim register, 2's complement, 1.9ppm per bit */
 
 #define PMIC_GP_ID_0		0x121	/* General purpose ID 0 (R/W) */
+#define PMIC_GP_ID_1		0x122	/* General purpose ID 1 (R/W) */
 
 #define PMIC_REG_CONFIG_ID	0x184	/* OTP Config ID <ver.rev> */
 

board/nm/hw25/board.c

@@ -1304,13 +1304,13 @@ static void ft_dio(void *blob)
 		ft_enable_node(blob, "/netbox_dio_2in_1out");
 
 		/* OEM Linux gpios -> remove IOs not present */
-		ft_set_gpio_name(blob, "/ocp/gpio@44e07000", 27, "");	/* gpio0_27: IO_OUT1n */
+		ft_set_gpio_name(blob, "gpio0", 27, "");	/* gpio0_27: IO_OUT1n */
-		ft_set_gpio_name(blob, "/ocp/gpio@4804c000", 14, "");	/* gpio1_14: IO_IN2 */
+		ft_set_gpio_name(blob, "gpio1", 14, "");	/* gpio1_14: IO_IN2 */
-		ft_set_gpio_name(blob, "/ocp/gpio@4804c000", 15, "");	/* gpio1_15: IO_IN3 */
+		ft_set_gpio_name(blob, "gpio1", 15, "");	/* gpio1_15: IO_IN3 */
 
 		/* pmic_gpios: 5: IO_IN2_WAKE3n, 6: IO_IN2_WAKE3n */
-		ft_set_gpio_name(blob, "/ocp/i2c@44e0b000/da9063@58/gpio", 5, "");	
+		ft_set_gpio_name(blob, "pmic_gpios", 5, "");
-		ft_set_gpio_name(blob, "/ocp/i2c@44e0b000/da9063@58/gpio", 6, "");
+		ft_set_gpio_name(blob, "pmic_gpios", 6, "");
 		break;
 
 	default:
@@ -1321,13 +1321,12 @@ static void ft_dio(void *blob)
 static void ft_tty(void *blob)
 {
 	if (hw_has_tty) {
-		/* TODO: Should use alias uart5 */
+		ft_enable_node(blob, "serial5");
-		ft_enable_node(blob, "/ocp/serial@481aa000");
 	}
 	else {
 		/* OEM Linux gpios -> remove IOs not present */
-		ft_set_gpio_name(blob, "/ocp/gpio@44e07000", 22, "");	/* gpio0_22: SEL_RS232_RS485n */
+		ft_set_gpio_name(blob, "gpio0", 22, "");	/* gpio0_22: SEL_RS232_RS485n */
-		ft_set_gpio_name(blob, "/ocp/gpio@44e07000", 23, "");	/* gpio0_23: RS485_TERM_ENn */
+		ft_set_gpio_name(blob, "gpio0", 23, "");	/* gpio0_23: RS485_TERM_ENn */
 	}
 }
 

board/nm/nmhw21/Makefile

@@ -10,4 +10,4 @@ ifeq ($(CONFIG_SKIP_LOWLEVEL_INIT),)
 obj-y	:= mux.o
 endif
 
-obj-y	+= board.o ../common/bdparser.o ../common/board_descriptor.o ../common/da9063.o ../common/ether_crc.o fileaccess.o sja1105.o ui.o um.o
+obj-y	+= board.o ../common/bdparser.o ../common/board_descriptor.o ../common/da9063.o ../common/ether_crc.o fileaccess.o sja1105.o ui.o um.o reset_reason.o

board/nm/nmhw21/board.c

@@ -37,8 +37,8 @@
 #include "../common/bdparser.h"
 #include "../common/board_descriptor.h"
 #include "../common/da9063.h"
-#include "../common/ether_crc.h"
 #include "board.h"
+#include "reset_reason.h"
 #include "sja1105.h"
 #include "ui.h"
 #include "um.h"
@@ -48,10 +48,13 @@ DECLARE_GLOBAL_DATA_PTR;
 /*
 * CPU GPIOs
 *
+* (C15) GPIO0_6: MB_LED_PWM
+* (V2)  GPIO0_8: RS232_485n_SEL (V3.2)
+* (V3)  GPIO0_9: RS485_DE (V3.2)
 * (J18) GPIO0_16: ETH_SW_RST~ (V2.0)
 * (K15) GPIO0_17: CTRL.INT~
 * (T10) GPIO0_23: CAN_TERM1~ (V1.0)
-* (T17) GPIO0_30: LED0.RD
+* (T17) GPIO0_30: LED0.GN (<V3.2 only)
 *
 * (T12) GPIO1_12: SIM_SW
 * (V13) GPIO1_14: GNSS_RST~
@@ -59,11 +62,12 @@ DECLARE_GLOBAL_DATA_PTR;
 * (R14) GPIO1_20: BT_EN
 * (V15) GPIO1_21: GSM_PWR_EN
 * (U15) GPIO1_22: LED1.RD
+* (T15) GPIO1_23: LED0.GN (V3.2)
 * (V16) GPIO1_24: LED1.GN
 * (U16) GPIO1_25: RST_GSM
 * (T16) GPIO1_26: WLAN_EN
 * (V17) GPIO1_27: WLAN_IRQ
-* (U18) GPIO1_28: LED0.GN
+* (U18) GPIO1_28: LED0.RD
 *
 * (U3) GPIO2_16: TIMEPULSE~ (HW26)
 * (R6) GPIO2_25: RST_ETH~
@@ -77,7 +81,9 @@ DECLARE_GLOBAL_DATA_PTR;
 
 #define GPIO_TO_PIN(bank, gpio)		(32 * (bank) + (gpio))
 
-#define GPIO_LED0_GREEN		GPIO_TO_PIN(0, 30)
+#define GPIO_LED_PWM_V32	GPIO_TO_PIN(0, 6)	/* V3.2 LED brightness */
+#define GPIO_LED0_GREEN		GPIO_TO_PIN(0, 30)	/* <V3.2 */
+#define GPIO_LED0_GREEN_V32	GPIO_TO_PIN(1, 23)	/* V3.2 */
 #define GPIO_LED0_RED		GPIO_TO_PIN(1, 28)
 #define GPIO_LED1_GREEN		GPIO_TO_PIN(1, 24)
 #define GPIO_LED1_RED		GPIO_TO_PIN(1, 22)
@@ -107,6 +113,8 @@ DECLARE_GLOBAL_DATA_PTR;
 
 #define GPIO_UART2_RX 		GPIO_TO_PIN(0, 2)	/* UART Rx Pin as GPIO */
 
+#define GPIO_RS232_RS485n_SEL	GPIO_TO_PIN(0, 8)
+#define GPIO_RS485_DE		GPIO_TO_PIN(0, 9)
 
 /*
  * PMIC GPIOs
@@ -142,6 +150,13 @@ DECLARE_GLOBAL_DATA_PTR;
 #error Recovery boot time must be larger than factory reset + 1 second
 #endif
 
+/*
+ * CPU Reset Reason
+ */
+
+#define CPU_GLOBAL_COLD_RST		0x01
+#define CPU_GLOBAL_WARM_SW_RST		0x02
+#define CPU_WDT1_RESET			0x10
 
 
 #if !defined(CONFIG_SPL_BUILD)
@@ -153,6 +168,8 @@ static int hw_type = -1;
 static char hw_variant_name[64];
 #else
 static int hw_type = -1;
+static int hw_ver = -1;
+static int hw_rev = -1;
 static uint32_t sys_start_event = 0x0;
 #endif
 
@@ -213,10 +230,24 @@ err_free_gpio:
 #define REQUEST_AND_CLEAR_GPIO(N)	request_and_set_gpio(N, #N, 0);
 
 
+static bool is_v32_or_newer(void)
+{
+	int full_ver = hw_ver*256 + hw_rev;
+	bool res = full_ver >= 0x0302;
+
+	return res;
+}
+
 static void init_leds(void)
 {
 	REQUEST_AND_SET_GPIO(GPIO_LED0_RED);
-	REQUEST_AND_SET_GPIO(GPIO_LED0_GREEN);
+	if (is_v32_or_newer()) {
+		REQUEST_AND_SET_GPIO(GPIO_LED_PWM_V32);
+		REQUEST_AND_SET_GPIO(GPIO_LED0_GREEN_V32);
+	}
+	else {
+		REQUEST_AND_SET_GPIO(GPIO_LED0_GREEN);
+	}
 	REQUEST_AND_SET_GPIO(GPIO_LED1_RED);
 	REQUEST_AND_SET_GPIO(GPIO_LED1_GREEN);
 }
@@ -224,7 +255,12 @@ static void init_leds(void)
 static void set_status_led(int red, int green)
 {
 	gpio_set_value(GPIO_LED0_RED, red);
-	gpio_set_value(GPIO_LED0_GREEN, green);
+	if (is_v32_or_newer()) {
+		gpio_set_value(GPIO_LED0_GREEN_V32, green);
+	}
+	else {
+		gpio_set_value(GPIO_LED0_GREEN, green);
+	}
 }
 
 static void set_indicator_led(int red, int green)
@@ -418,6 +454,26 @@ static void pmic_disable_auto_mode(void)
 	}
 }
 
+static void pmic_gnss_pwr_sequence(void)
+{
+	int rc;
+	uint8_t val;
+
+	/* 
+	 * GNSS 3.3V needs to start at same time as board 3.3V.
+	 * Modify LDO6 configuration accordingly if not already done.
+	 */
+	rc = da9063_get_reg(PMIC_REG_ID_6_5, &val);
+	if (!rc && (val != 0x20)) {
+		(void)da9063_set_reg(PMIC_REG_ID_6_5, 0x20);	/* Add LDO6 to sequencer, slot 2 */
+		(void)da9063_set_reg(PMIC_REG_CONFIG_G, 0x64);	/* LDO6 automatic enable control by sequencer */
+	}
+
+	/* Enable +3V3_GNSS (LDO6) */
+	(void)da9063_set_reg(PMIC_REG_LDO6_CONT, PMIC_LDOx_EN_MASK);
+	mdelay(2);
+}
+
 static void init_pmic_spl(void)
 {
 	int bus;
@@ -435,9 +491,7 @@ static void init_pmic_spl(void)
 		pmic_disable_auto_mode();
 	}
 
-	/* Enable +3V3_GNSS (LDO6) */
+	pmic_gnss_pwr_sequence();
-	(void)da9063_set_reg(PMIC_REG_LDO6_CONT, PMIC_LDOx_EN_MASK);
-	mdelay(2);
 
 	/* Enable +5V_CAN (LDO11 Switch) */
 	(void)da9063_set_reg(PMIC_REG_LDO11_CONT, PMIC_LDOx_EN_MASK);
@@ -452,81 +506,39 @@ static void init_pmic_spl(void)
 		(void)da9063_set_reg(PMIC_REG_TRIM_CLDR, 0);
 	}
 
+	/* Mask unwanted IRQs to avoid accidental wakeup */
+	const uint8_t mask_a = PMIC_REG_EVENT_ONKEY_MASK | 
+			       PMIC_REG_EVENT_RTC_ALARM_MASK | 
+			       PMIC_REG_EVENT_RTC_TICK_MASK;
+	(void)da9063_set_reg(PMIC_REG_IRQ_MASK_A, ~(mask_a) & 0x1F);
+	(void)da9063_set_reg(PMIC_REG_IRQ_MASK_B, ~PMIC_REG_EVENT_COMP1V2_MASK);
+	(void)da9063_set_reg(PMIC_REG_IRQ_MASK_C, ~0x00);
+	(void)da9063_set_reg(PMIC_REG_IRQ_MASK_D, ~0x00);
+
 	da9063_release_i2c_bus(bus);
 }
 
-
+static void check_reset_reason(unsigned int reset_reason_shm_location)
-struct reset_registers {
-	/* Reboot Reasons, set by OS, expect watchdog set by bootloader */
-	uint32_t rr_value;
-	uint32_t rr_value_crc;
-
-	/* Start Events */
-	uint32_t se_magic;	/* Token to check presence of following fields */
-	uint32_t se_events;	/* Events bitmask, see SE_... defines */
-	uint32_t se_checksum;	/* Checksum over se_events */
-};
-
-/* Watchdog reboot reason event */
-#define RR_EXTERNAL_WATCHDOG_PATTERN	0x781f9ce2
-
-/* Start event token 'SRTE' */
-#define SE_MAGIC			0x53525445
-
-/* Possible start events (see se_events) */
-#define SE_POR  			0x00000001
-#define SE_WATCHDOG  			0x00000010
-#define SE_IGNITION  			0x00000100
-#define SE_RTC_ALARM  			0x00000200
-#define SE_RTC_TICK  			0x00000400
-
-
-static void print_start_reason(uint32_t events)
-{
-	puts("\nStart Events: ");
-
-	if (events == 0) {
-		puts("-\n");
-	}
-	else {
-		static char buffer[10+11+11+6+6+1];
-
-		buffer[0] = 0;
-		if (events & SE_POR)
-			strncat(buffer, "PowerOn, ", sizeof(buffer));
-		if (events & SE_WATCHDOG)
-			strncat(buffer, "Watchdog, ", sizeof(buffer));
-		if (events & SE_IGNITION)
-			strncat(buffer, "Ignition, ", sizeof(buffer));
-		if (events & SE_RTC_ALARM)
-			strncat(buffer, "RTC, ", sizeof(buffer));
-		if (events & SE_RTC_TICK)
-			strncat(buffer, "Tick, ", sizeof(buffer));
-
-		/* Trim last comma, no 0 len check required, at least one entry is present */
-		buffer[strlen(buffer)-2] = 0;
-		printf("%s\n", buffer);
-	}
-}
-
-static void check_pmic_reset_reason(unsigned int reset_reason_shm_location)
 {
 	volatile struct reset_registers* reset_regs = (struct reset_registers*)reset_reason_shm_location;
-	uint32_t start_event = 0;
+	uint32_t start_reason = 0;
+	uint32_t reset_reason = 0;
+	uint32_t cpu_reset_reason = 0;
 	uint8_t state = 0x00;
 	int bus;
 	int ret;
+	char strbuf[256];
 
 	bus = da9063_claim_i2c_bus();
 
 	/*
-	 * Check/write boot marker to GP_ID_0
+	 * Check/write boot marker to PMIC register GP_ID_1
 	 * If this marker is not present, we have a power on reset
 	 */
-	ret = da9063_get_reg(PMIC_GP_ID_0, &state);
+	ret = da9063_get_reg(PMIC_GP_ID_1, &state);
 	if ((ret == 0) && (state != 0xC5)) {
-		start_event |= SE_POR;
+		(void)da9063_set_reg(PMIC_GP_ID_1, 0xC5);
-		(void)da9063_set_reg(PMIC_GP_ID_0, 0xC5);
+		start_reason |= SR_POR;
 	}
 
 	/*
@@ -536,72 +548,131 @@ static void check_pmic_reset_reason(unsigned int reset_reason_shm_location)
 	 */
 	ret = da9063_get_reg(PMIC_REG_FAULT_LOG, &state);
 	if ((ret == 0) && (state != 0)) {
-		// PMIC Watchdog
-		if (state & PMIC_FAULT_TWD_ERROR_MASK) {
-			start_event |= SE_WATCHDOG;
-
-			reset_regs->rr_value = RR_EXTERNAL_WATCHDOG_PATTERN;
-			reset_regs->rr_value_crc = ether_crc(sizeof(reset_regs->rr_value),
-							    (const uint8_t*)&(reset_regs->rr_value));
-		}
-
-		// PMIC Power On Reset (only when RTC battery is removed)
-		if (state & PMIC_FAULT_POR_MASK) {
-			start_event |= SE_POR;
-		}
-
 		/* clear pmic fault log by writing back all bits currently set */
 		(void)da9063_set_reg(PMIC_REG_FAULT_LOG, state);
+
+		/* PMIC Power On Reset (only when RTC battery is removed) */
+		if (state & PMIC_FAULT_POR_MASK) {
+			start_reason |= SR_POR;
+		}
+
+		/* PMIC Watchdog */
+		if (state & PMIC_FAULT_TWD_ERROR_MASK) {
+			start_reason |= SR_WATCHDOG;
+		}
 	}
 
 	/*
-	 * Event Register A
+	 * Check CPU reset reason register as the device can be reset
-	 * - Event B Activity
+	 * by a CPU watchdog
+	 */
+	cpu_reset_reason = readl(PRM_RSTST);
+	if (cpu_reset_reason & CPU_WDT1_RESET) {
+		start_reason |= SR_WATCHDOG;
+	}
+
+	/* clear the CPU reset reason register */
+	writel((CPU_WDT1_RESET | CPU_GLOBAL_COLD_RST | CPU_GLOBAL_WARM_SW_RST), PRM_RSTST);
+
+
+	/*
+	 * Check Wakeup Events
+	 * Event Register A holds:
+	 * - Event B, C Activity
+	 * - nONKEY: Button
 	 * - RTC Alarm
 	 * - RTC Tick
+	 * Event Register B
+	 * - COMP 1V2: Ignition
 	 */
 	ret = da9063_get_reg(PMIC_REG_EVENT_A, &state);
 	if ((ret == 0) && (state != 0)) {
 		(void)da9063_set_reg(PMIC_REG_EVENT_A, state);
 
+		if (state & PMIC_REG_EVENT_ONKEY_MASK) {
+			start_reason |= (SR_WAKEUP | SR_EVT_BUTTON);
+		}
+
 		if (state & PMIC_REG_EVENT_RTC_ALARM_MASK) {
-			start_event |= SE_RTC_ALARM;
+			start_reason |= (SR_WAKEUP | SR_EVT_RTC_ALARM);
 		}
 
 		if (state & PMIC_REG_EVENT_RTC_TICK_MASK) {
-			start_event |= SE_RTC_TICK;
+			start_reason |= (SR_WAKEUP | SR_EVT_RTC_TICK);
 		}
 
 		if (state & PMIC_REG_EVENT_EVENTS_B_MASK) {
-			/*
+			uint8_t state_b;
-			 * Event Register B
-			 * - COMP 1V2: Ignition
-			 */
-			ret = da9063_get_reg(PMIC_REG_EVENT_B, &state);
-			if ((ret == 0) && (state != 0)) {
-				(void)da9063_set_reg(PMIC_REG_EVENT_B, state);
 
-				if (state & PMIC_REG_EVENT_COMP1V2_MASK) {
+			ret = da9063_get_reg(PMIC_REG_EVENT_B, &state_b);
-					start_event |= SE_IGNITION;
+			if ((ret == 0) && (state_b != 0)) {
+				(void)da9063_set_reg(PMIC_REG_EVENT_B, state_b);
+
+				if (state_b & PMIC_REG_EVENT_COMP1V2_MASK) {
+					start_reason |= (SR_WAKEUP | SR_EVT_IGNITION);
 				}
 			}
 		}
-
-		/* TODO: Should we clear events here or leave them for Linux driver? */
 	}
 
-	sys_start_event = start_event;
+	/*
+	 * Check for software reboot indicated by OS via shared memory
+	 * - checksum valid?
+	 * - Reason == 'REBO' or 'OOPS'
+	 */
+	if (rr_is_reset_reason_valid(reset_regs))
+	{
+		if (reset_regs->rr_value == RR_REBOOT_PATTERN) {
+			start_reason |= SR_REBOOT;
+		}
+		else if (reset_regs->rr_value == RR_OOPS_PATTERN) {
+			/* Treat kernel oops as reboot */
+			start_reason |= SR_REBOOT;
+		}
+		else if (reset_regs->rr_value == RR_WAKE_PATTERN) {
+			start_reason |= SR_WAKEUP;
+		}
+		else {
+			/* Unknown reset reason */
+		}
+	}
 
-	/* Store start events in shared memory region for OS */
+	/*
-	reset_regs->se_magic = SE_MAGIC;
+	 * Priority decoder for start and reset reason
-	reset_regs->se_events = start_event;
+	 */
-	reset_regs->se_checksum = 0;
+	if (start_reason & SR_WATCHDOG) {
-	reset_regs->se_checksum = ether_crc(sizeof(reset_regs->se_events),
+		/* Watchdog has highest priority as it also sets POR and other events */
-					   (const uint8_t*)&(reset_regs->se_events));
+		start_reason = SR_WATCHDOG;
+		reset_reason = RR_EXTERNAL_WATCHDOG_PATTERN;
+	}
+	else if (start_reason & SR_POR) {
+		start_reason = SR_POR;
+		reset_reason = RR_POWEROFF_PATTERN;
+	}
+	else if (start_reason & SR_WAKEUP) {
+		/* Include start events when wakeup is detected */
+		start_reason = SR_WAKEUP | (start_reason & SR_EVT_WAKE_MASK);
+		reset_reason = RR_WAKE_PATTERN;
+	}
+	else if (start_reason & SR_REBOOT) {
+		start_reason = SR_REBOOT;
+		reset_reason = reset_regs->rr_value;
+	}
+	else {
+		/* Unknown start reason, assume reboot */
+		start_reason = SR_REBOOT;
+		reset_reason = reset_regs->rr_value;
+	}
+	
+	sys_start_event = start_reason;
+
+	rr_set_reset_reason(reset_regs, reset_reason);
+	rr_set_start_reason(reset_regs, start_reason);
 
 	da9063_release_i2c_bus(bus);
 
-	print_start_reason(reset_regs->se_events);
+	rr_start_reason_to_str(reset_regs->sr_events, strbuf, sizeof(strbuf));
+	printf("\nStart Events: %s\n", strbuf);
 }
 
 static void pmic_ignition_gate_on(void)
@@ -619,9 +690,7 @@ static void pmic_ignition_gate_on(void)
 	val |= 0xC0;
 	(void)da9063_set_reg(PMIC_REG_CONFIG_L, val);
 
-	(void)da9063_get_reg(PMIC_REG_CONTROL_D, &val);		/* No blinking, state selected by GPIOxx_MODE */
+	(void)da9063_set_reg(PMIC_REG_CONTROL_D, 0x00);		/* No blinking, state selected by GPIOxx_MODE */
-	val &= ~0xF8;
-	(void)da9063_set_reg(PMIC_REG_CONTROL_D, val);
 
 	(void)da9063_get_reg(PMIC_REG_GPIO_MODE8_15, &val);	/* Set to GPIO14,15 to high */
 	val |= 0xC0;
@@ -643,7 +712,7 @@ static void powerdown(void)
 	bus = da9063_claim_i2c_bus();
 
 	/* Final call, will not return */
-	da9063_set_reg(PMIC_REG_CONTROL_A, 0x00);
+	(void)da9063_set_reg(PMIC_REG_CONTROL_A, 0x00);
 
 	da9063_release_i2c_bus(bus);
 
@@ -712,6 +781,8 @@ static void init_bd_spl(void)
 	if (read_eeprom() >= 0) {
 		int hw_type_from_bd = -1;
 
+		bd_get_hw_version(&hw_ver, &hw_rev);
+
 		/* If entry is found returns value, otherwise 0 */
 		bd_get_hw_type(&hw_type_from_bd);
 		if (hw_type_from_bd != 0) {
@@ -723,6 +794,29 @@ static void init_bd_spl(void)
 	}
 }
 
+static void power_um(void)
+{
+	int bus;
+
+	da9063_init(CONFIG_PMIC_I2C_BUS);
+
+	bus = da9063_claim_i2c_bus();
+
+	REQUEST_AND_CLEAR_GPIO(GPIO_RST_UM_N);		/* Assert reset (active low) */
+	REQUEST_AND_CLEAR_GPIO(GPIO_CTRL_WDIS_N);
+
+	da9063_set_gpio(PMIC_UM_SUPPLY_EN_IO, 0);	/* Switch Supply off */
+	mdelay(30);					/* Give time to discharge output */
+
+	da9063_set_gpio(PMIC_UM_SUPPLY_VSEL_IO, 0);	/* Set voltage to 3.3V */
+	mdelay(1);
+
+	da9063_set_gpio(PMIC_UM_SUPPLY_EN_IO, 1);	/* Enable Supply */
+	mdelay(10);
+
+	da9063_release_i2c_bus(bus);
+}
+
 void am33xx_spl_board_init(void)
 {
 	/* Set CPU speed to 600 MHz (fix) */
@@ -734,25 +828,39 @@ void am33xx_spl_board_init(void)
 	/* Configure both I2C buses used */
 	init_i2c();
 
+	/* Power on Extension/User module, so it doesn't block I2C bus */
+	power_um();
+
 	/* Get board descriptor */
 	init_bd_spl();
 
 	/* Detect reset/Wakeup reason */
-	check_pmic_reset_reason(RESET_REASON_SHM_LOCATION);
+	check_reset_reason(RESET_REASON_SHM_LOCATION);
 
 	/* Switch on ignition gate so we can read state later */
 	pmic_ignition_gate_on();
 
+	/* Setup PMIC */
+	init_pmic_spl();
+
 	/*
 	 * If this is a power-on start, see if ignition is active.
 	 * If not, power down as this is considered an unwanted system start.
 	 */
-	if (sys_start_event & SE_POR) {
+	if (sys_start_event & SR_POR) {
 		stop_if_ignition_is_off();
 	}
 
-	/* Setup PMIC */
+	if (is_v32_or_newer()) {
-	init_pmic_spl();
+		enable_led_mux_v32();
+		enable_uart4_pin_mux();
+		
+		REQUEST_AND_CLEAR_GPIO(GPIO_RS485_DE);
+		REQUEST_AND_CLEAR_GPIO(GPIO_RS232_RS485n_SEL);
+	}
+	else {
+		enable_led_mux();
+	}
 
 	init_leds();
 	set_status_led(1, 0); /* Red */
@@ -963,30 +1071,14 @@ static void init_usb_hub(void)
 
 static void init_user_module(void)
 {
-	int bus;
-
-	bus = da9063_claim_i2c_bus();
-
 	puts("UM:    ");
 
 	REQUEST_AND_CLEAR_GPIO(GPIO_RST_UM_N);		/* Assert reset (active low) */
-	REQUEST_AND_CLEAR_GPIO(GPIO_CTRL_WDIS_N)	/* TODO: CHECK */
+	REQUEST_AND_CLEAR_GPIO(GPIO_CTRL_WDIS_N);
-
-	/* TODO: Should this be done at first power up as well? */
-	da9063_set_gpio(PMIC_UM_SUPPLY_EN_IO, 0);	/* Switch Supply off */
-	mdelay(30);					/* Give time to discharge output */
-
-	da9063_set_gpio(PMIC_UM_SUPPLY_VSEL_IO, 0);	/* Set voltage to 3.3V */
-	mdelay(1);
-
-	da9063_set_gpio(PMIC_UM_SUPPLY_EN_IO, 1);	/* Enable Supply */
-	mdelay(10);
 
 	gpio_direction_input(GPIO_RST_UM_N);		/* Release reset (open drain) */
 	mdelay(10);
 
-	da9063_release_i2c_bus(bus);
-
 	mdelay(200);					/* Give module some time to boot */
 	um_init(CONFIG_UM_I2C_BUS);			/* Try to detect user module */
 
@@ -1084,12 +1176,33 @@ static void init_gsm(void)
 #endif
 }
 
-static void init_gnss(void)
+static void init_gnss(uint32_t reset_reason_shm_location)
 {
+	volatile struct reset_registers* reset_regs = (struct reset_registers*)reset_reason_shm_location;
+	bool do_reset = false;
+
 	/*
-	 * Release GNSS reset line, so that module starts up early
+	 * Release GNSS reset line, so that module starts up early.
+	 * Excpetion: If this is an initial power up, we reset the module to ensure defined operation.
+	 * Reasoning: Some NEO-M9 modems start in Safe Boot mode, due to power sequencing.
 	 */
-	REQUEST_AND_SET_GPIO(GPIO_RST_GNSS);
+	puts("GNSS:  ");
+
+	if (rr_is_start_reason_valid(reset_regs)) {
+		if ((reset_regs->sr_events & SR_POR) == SR_POR) {
+			do_reset = true;
+		}
+	}
+
+	if (do_reset) {
+		puts("reset\n");
+		REQUEST_AND_CLEAR_GPIO(GPIO_RST_GNSS);
+		mdelay(110);
+		gpio_set_value(GPIO_RST_GNSS, 1);
+	} else {
+		puts("init\n");
+		REQUEST_AND_SET_GPIO(GPIO_RST_GNSS);
+	}
 }
 
 static void init_timepulse(void)
@@ -1133,16 +1246,6 @@ int board_init(void)
 	ui_init(CONFIG_UI_I2C_BUS);
 #endif
 
-	/* Let user know we're starting */
-	init_leds();
-	set_status_led(1, 1);		/* Orange */
-	set_indicator_led(0, 0);	/* Off */
-
-#ifndef CONFIG_NRSW_BUILD
-	ui_set_status_led(1, 1);	/* Orange */
-	ui_set_indicator_led(0, 0);	/* Off */
-#endif
-
 	printf("OSC:   %lu MHz\n", get_osclk()/1000000);
 
 	return 0;
@@ -1786,6 +1889,16 @@ int board_late_init(void)
 	get_hw_version();
 	get_pmic_version();
 
+	/* Let user know we're starting */
+	init_leds();
+	set_status_led(1, 1);		/* Orange */
+	set_indicator_led(0, 0);	/* Off */
+
+#ifndef CONFIG_NRSW_BUILD
+	ui_set_status_led(1, 1);	/* Orange */
+	ui_set_indicator_led(0, 0);	/* Off */
+#endif
+
 #ifdef CONFIG_NRSW_BUILD
 	set_root_partition();
 	set_devicetree_name();
@@ -1845,7 +1958,7 @@ int board_late_init(void)
 #endif
 	init_sim_mux();
 	init_gsm();
-	init_gnss();
+	init_gnss(RESET_REASON_SHM_LOCATION);
 	init_timepulse();
 
 	/*
@@ -2032,6 +2145,85 @@ int board_fit_config_name_match(const char *name)
 
 #if defined(CONFIG_OF_BOARD_SETUP) && !defined(CONFIG_SPL_BUILD)
 
+static void ft_enable_node(void* blob, const char* name)
+{
+	int node_ofs = -1;
+
+	node_ofs = fdt_path_offset(blob, name);
+	// printf("ft_enable_node %s -> %d\n", name, node_ofs);
+	if (node_ofs >= 0) {
+		fdt_setprop_string(blob, node_ofs, "status", "okay");
+	}
+}
+
+static void ft_disable_node(void* blob, const char* name)
+{
+	int node_ofs = -1;
+
+	node_ofs = fdt_path_offset(blob, name);
+	// printf("ft_disable_node %s -> %d\n", name, node_ofs);
+	if (node_ofs >= 0) {
+		fdt_setprop_string(blob, node_ofs, "status", "disabled");
+	}
+}
+
+/*
+ * Modify the name of a gpio in a gpio-line-names string list.
+ */
+static void ft_set_gpio_name(void *blob, const char* gpio, int pin, const char* name)
+{
+	int node_ofs = fdt_path_offset(blob, gpio);
+	int gpios = -1;
+	const char* text;
+	int pos = 0;
+	int i;
+	char buffer[512];
+
+	if (node_ofs < 0) {
+		printf("Can't find node %s\n", gpio);
+		goto end;
+	}
+
+	/* get number of IOs in node */
+	gpios = fdt_getprop_u32_default_node(blob, node_ofs, 0, "ngpios", -1);
+	if (gpios == -1 || gpios > 64) {
+		printf("Illegal number of gpios %d\n", gpios);
+		goto end;
+	}
+
+	/* get string array with names */
+	const struct fdt_property* prop = fdt_get_property(blob, node_ofs, "gpio-line-names", NULL);
+	if (prop == NULL) {
+		goto end;
+	}
+
+	/* modify given name */
+	for (i=0; i<gpios; i++) {
+		if (i == pin) {
+			/* Take provided name if GPIO pin is matched */
+			text = name;
+		}
+		else {
+			/* Take existing name from string list */
+			(void)fdt_get_string_index(blob, node_ofs, "gpio-line-names", i, &text);
+		}
+
+		/* Add name to new string list */
+		if ((pos + strlen(text) + 1) < sizeof(buffer)) {
+			strncpy(buffer+pos, text, sizeof(buffer)-pos);
+			pos += strlen(text) + 1;
+		}
+		else {
+			printf("ft_set_gpio_name() Buffer too small\n");
+			goto end;
+		}
+	}
+
+	(void)fdt_setprop(blob, node_ofs, "gpio-line-names", buffer, pos);
+
+end: ;
+}
+
 static void ft_bootloader_version(void *blob)
 {
 	int node_offset;
@@ -2101,7 +2293,7 @@ static void ft_user_interface(void *blob)
 	if (ui_hw_version == 1) {
 		int node_offset;
 
-                node_offset = fdt_path_offset(blob, "/ocp/i2c@4802a000/pca9539@74/");
+                node_offset = fdt_path_offset(blob, "ui_v1");
                 if (node_offset != -1) {
                         fdt_setprop_string(blob, node_offset, "status", "okay");
                 }
@@ -2126,7 +2318,7 @@ static void ft_user_interface(void *blob)
 	else if (ui_hw_version == 2) {
 		int node_offset;
 
-                node_offset = fdt_path_offset(blob, "/ocp/i2c@4802a000/pca9538@70/");
+                node_offset = fdt_path_offset(blob, "ui_v2");
                 if (node_offset != -1) {
                         fdt_setprop_string(blob, node_offset, "status", "okay");
                 }
@@ -2153,6 +2345,21 @@ static void ft_user_interface(void *blob)
 	}
 }
 
+static void ft_start_event(void *blob, uint32_t reset_reason_shm_location)
+{
+	volatile struct reset_registers* reset_regs = (struct reset_registers*)reset_reason_shm_location;
+
+	if (rr_is_start_reason_valid(reset_regs)) {
+		int node_offset;
+
+		node_offset = fdt_path_offset(blob, "/sysstate-start/");
+		if (node_offset != -1) {
+
+			fdt_setprop_u32(blob, node_offset, "start-reason", reset_regs->sr_events);
+		}
+	}
+}
+
 #endif
 
 static void ft_eth(void *blob)
@@ -2169,13 +2376,13 @@ static void ft_eth(void *blob)
 	if (hw_ver == 1) {
 		int node_offset;
 
-		node_offset = fdt_path_offset(blob, "/ocp/ethernet@4a100000/mdio@4a101000/ethernet-phy@2/");
+		node_offset = fdt_path_offset(blob, "broadr1");
 		if (node_offset != -1) {
 			fdt_setprop_u32(blob, node_offset, "<reg>", 7);
 			fdt_setprop_u32(blob, node_offset, "reg", 7);
 		}
 
-		node_offset = fdt_path_offset(blob, "/ocp/ethernet@4a100000/mdio@4a101000/ethernet-phy@3/");
+		node_offset = fdt_path_offset(blob, "broadr0");
 		if (node_offset != -1) {
 			fdt_setprop_u32(blob, node_offset, "<reg>", 6);
 			fdt_setprop_u32(blob, node_offset, "reg", 6);
@@ -2183,6 +2390,35 @@ static void ft_eth(void *blob)
 	}
 }
 
+static void ft_uart4(void *blob)
+{
+	/*
+	 * V3.2 HW can feature uart4 as RS232/485 interface.
+     * TODO: Check product descriptor to see if interface is assembled?
+	 */
+	if (is_v32_or_newer()) {
+		ft_enable_node(blob, "serial4");
+	}
+	else {
+		/* If interface is not present, remove SEL_RS232_RS485n name from gpio0_8 */
+		ft_set_gpio_name(blob, "gpio0", 8, "");
+	}
+}
+
+static void ft_led(void *blob)
+{
+	/*
+	 * V3.2 HW has LED0 Green at GPIO1_23 instead of 0_30
+	 *      Link from SysState-LED Driver also needs to be adapted
+	 */
+	if (is_v32_or_newer()) {
+		ft_disable_node(blob, "status_led");
+		ft_disable_node(blob, "/sysstate-led");
+		ft_enable_node(blob, "status_led_v32");
+		ft_enable_node(blob, "/sysstate-led-v32");
+	}
+}
+
 int ft_board_setup(void *blob, bd_t *bd)
 {
 	ft_bootloader_version(blob);
@@ -2192,6 +2428,9 @@ int ft_board_setup(void *blob, bd_t *bd)
 	ft_user_module(blob);
 #endif
 	ft_eth(blob);
+	ft_uart4(blob);
+	ft_led(blob);
+	ft_start_event(blob, RESET_REASON_SHM_LOCATION);
 
 	return 0;
 }

board/nm/nmhw21/board.h

@@ -13,8 +13,10 @@
 
 void enable_uart0_pin_mux(void);
 void enable_uart2_pin_mux(void);
+void enable_uart4_pin_mux(void);
 void enable_spi1_mux(void);
-
+void enable_led_mux(void);
+void enable_led_mux_v32(void);
 void enable_board_pin_mux(void);
 
 #define GPIO_TO_PIN(bank, gpio)		(32 * (bank) + (gpio))

board/nm/nmhw21/mux.c

@@ -23,24 +23,22 @@
 
 static struct module_pin_mux gpio_pin_mux[] = {
 	/*
+	* (V2)  GPIO0_8: RS232_485n_SEL (V3.2)
+	* (V3)  GPIO0_9: RS485_DE (V3.2)
 	* (J18) GPIO0_16: ETH_SW_RST~ (V2.0)
 	* (K15) GPIO0_17: CTRL.INT~
 	* (T10) GPIO0_23: CAN_TERM1~ (V1.0)
-	* (T17) GPIO0_30: LED0.GN
 	*
 	* (T12) GPIO1_12: SIM_SW
 	* (V13) GPIO1_14: GNSS_RST~
 	* (U13) GPIO1_15: CAN_TERM0~ (V1.0)
 	* (R14) GPIO1_20: BT_EN
 	* (V15) GPIO1_21: GSM_PWR_EN
-	* (U15) GPIO1_22: LED1.RD
-	* (V16) GPIO1_24: LED1.GN
 	* (U16) GPIO1_25: RST_GSM
 	* (T16) GPIO1_26: WLAN_EN
 	* (V17) GPIO1_27: WLAN_IRQ
-	* (U18) GPIO1_28: LED0.RD
 	*
-	* (U3) GPIO2_16: TIMEPULSE (HW26)
+	* (U3) GPIO2_16: TIMEPULSE (HW26), see note [1]
 	* (R6) GPIO2_25: RST_ETH~
 	*
 	* (J17) GPIO3_4: GNSS_EXTINT
@@ -48,47 +46,31 @@ static struct module_pin_mux gpio_pin_mux[] = {
 	* (L18) GPIO3_10: CTRL.RST
 	* (C12) GPIO3_17: UI_RST~
 	* (A14) GPIO3_21: RST_HUB~ (USB)
+	*
+	* [1] No PU/PD allowed as TIMEPULSE is internally connected with SAFEBOOT_N.
+	*     SAFEBOOT_N must be left open/floating.
 	*/
 
 	/* Bank 0 */
 	{OFFSET(mii1_txd3), (MODE(7) | PULLUDDIS)},				/* (J18) GPIO0_16: ETH_SW_RST~ (V2.0) */
 	{OFFSET(mii1_txd2), (MODE(7) | PULLUDEN | PULLUP_EN | RXACTIVE)},	/* (K15) GPIO0_17: CTRL.INT~ */
 	{OFFSET(gpmc_ad9), (MODE(7) | PULLUDDIS)},				/* (T10) GPIO0_23: CAN_TERM1~ */
-	{OFFSET(gpmc_wait0), (MODE(7) | PULLUDDIS)},				/* (T17) GPIO0_30: LED0.GN */
 
 	/* Bank 1 */
-	{OFFSET(gpmc_ad12), (MODE(7) | PULLUDDIS)},				/* (T12) GPIO1_12: SIM_SW */
+	{OFFSET(gpmc_ad12), (MODE(7) | PULLUDEN | PULLUP_EN)},			/* (T12) GPIO1_12: SIM_SW */
 	{OFFSET(gpmc_ad14), (MODE(7) | PULLUDDIS)},				/* (V13) GPIO1_14: GNSS_RST~ */
 	{OFFSET(gpmc_ad15), (MODE(7) | PULLUDDIS)},				/* (U13) GPIO1_15: CAN_TERM0~ */
 
 	{OFFSET(gpmc_a4), (MODE(7) | PULLUDDIS)},				/* (R14) gpio1_20: BT_EN */
 	{OFFSET(gpmc_a5), (MODE(7) | PULLUDDIS)},				/* (V15) gpio1_21: GSM_PWR_EN */
-	{OFFSET(gpmc_a6), (MODE(7) | PULLUDDIS)},				/* (U15) GPIO1_22: LED1.RD */
-	{OFFSET(gpmc_a8), (MODE(7) | PULLUDDIS)},				/* (V16) GPIO1_24: LED1.GN */
 	{OFFSET(gpmc_a9), (MODE(7) | PULLUDDIS)},				/* (U16) gpio1_25: RST_GSM */
 	{OFFSET(gpmc_a10), (MODE(7) | PULLUDDIS)},				/* (T16) gpio1_26: WLAN_EN */
 	{OFFSET(gpmc_a11), (MODE(7) | PULLUDDIS | RXACTIVE)},			/* (V17) gpio1_27: WLAN_IRQ */
-	{OFFSET(gpmc_be1n), (MODE(7) | PULLUDDIS)},				/* (U18) GPIO1_28: LED0.RD */
-
-	/* TODO: What about all the unused GPMC pins ? */
 
 	/* Bank 2 */
-	{OFFSET(lcd_data10), (MODE(7) | PULLUDEN | PULLDOWN_EN | RXACTIVE)},	/* (U3) GPIO2_16: TIMEPULSE input */
+	{OFFSET(lcd_data10), (MODE(7) | PULLUDDIS | RXACTIVE)},			/* (U3) GPIO2_16: TIMEPULSE */
 	{OFFSET(lcd_ac_bias_en), (MODE(7) | PULLUDDIS)},			/* (R6) GPIO2_25: RST_ETH~ */
 
-#if 0
-	/* TODO: What is this meant for? */
-	{OFFSET(lcd_data3), (MODE(7) | PULLUDEN | PULLUP_EN)},	/* (R4) gpio2[9] */  /* SYSBOOT_3 */
-	{OFFSET(lcd_data4), (MODE(7) | PULLUDEN | PULLUP_EN)},	/* (T1) gpio2[10] */  /* SYSBOOT_4 */
-
-	/* TODO: Check other unued pins from sysboot block */
-	/* Ensure PU/PD does not work against external signal */
-	/*
-	 * SYSBOOT 0,1,5,12,13 = Low
-	 * SYSBOOT 2 = High
-	 */
-#endif
-
 	/* Bank 3 */
 	{OFFSET(mii1_rxdv), (MODE(7) | PULLUDDIS)},			/* (J17) GPIO3_4: GNSS_EXTINT */
 	{OFFSET(mii1_txclk), (MODE(7) | PULLUDDIS)},			/* (K18) GPIO3_9: CTRL.W_DIS */
@@ -98,6 +80,39 @@ static struct module_pin_mux gpio_pin_mux[] = {
 	{-1}
 };
 
+static struct module_pin_mux led_pin_mux[] = {
+	/*
+	* (T17) GPIO0_30: LED0.GN
+	* (U15) GPIO1_22: LED1.RD
+	* (V16) GPIO1_24: LED1.GN
+	* (U18) GPIO1_28: LED0.RD
+	*/
+
+	{OFFSET(gpmc_wait0), (MODE(7) | PULLUDDIS)},				/* (T17) GPIO0_30: LED0.GN */
+	{OFFSET(gpmc_a6), (MODE(7) | PULLUDDIS)},				/* (U15) GPIO1_22: LED1.RD */
+	{OFFSET(gpmc_a8), (MODE(7) | PULLUDDIS)},				/* (V16) GPIO1_24: LED1.GN */
+	{OFFSET(gpmc_be1n), (MODE(7) | PULLUDDIS)},				/* (U18) GPIO1_28: LED0.RD */
+	{-1}
+};
+
+static struct module_pin_mux led_pin_mux_v32[] = {
+	/*
+	* (C15) GPIO0_6: MB_LED_PWM
+	* (U15) GPIO1_22: LED1.RD
+	* (T15) GPIO1_23: LED0.GN (formerly: (T17) GPIO0_30)
+	* (V16) GPIO1_24: LED1.GN
+	* (U18) GPIO1_28: LED0.RD
+	*/
+
+	{OFFSET(spi0_cs1), (MODE(7) | PULLUDDIS)},				/* (C15) GPIO0_6: MB_LED_PWM */
+	{OFFSET(gpmc_a6), (MODE(7) | PULLUDDIS)},				/* (U15) GPIO1_22: LED1.RD */
+	{OFFSET(gpmc_a7), (MODE(7) | PULLUDDIS)},				/* (T15) GPIO1_23: LED0.GN */
+	{OFFSET(gpmc_a8), (MODE(7) | PULLUDDIS)},				/* (V16) GPIO1_24: LED1.GN */
+	{OFFSET(gpmc_be1n), (MODE(7) | PULLUDDIS)},				/* (U18) GPIO1_28: LED0.RD */
+	{-1}
+};
+
+
 /* I2C0 PMIC */
 static struct module_pin_mux i2c0_pin_mux[] = {
 	{OFFSET(i2c0_sda), (MODE(0) | RXACTIVE | PULLUDEN | PULLUP_EN | SLEWCTRL)},	/* (C17) I2C0_SDA */
@@ -203,8 +218,22 @@ static struct module_pin_mux uart2_pin_mux[] = {
 
 /* UART3: GNSS */
 static struct module_pin_mux uart3_pin_mux[] = {
-	{OFFSET(mii1_rxd3), (MODE(1) | PULLUDEN | PULLUP_EN | RXACTIVE)},	/* (L17) UART3_RXD */
+	{OFFSET(mii1_rxd3), (MODE(1) | PULLUDDIS | RXACTIVE)},			/* (L17) UART3_RXD */
-	{OFFSET(mii1_rxd2), (MODE(1) | PULLUDEN | PULLUP_EN | SLEWCTRL)},	/* (L16) UART3_TXD */
+	{OFFSET(mii1_rxd2), (MODE(1) | PULLUDDIS | SLEWCTRL)},			/* (L16) UART3_TXD */
+	{-1}
+};
+
+/* UART4: User RS232/485 (V3.2 only) */
+static struct module_pin_mux uart4_pin_mux[] = {
+	/*
+	 * CTSn = SEL_RS232/RS485~: Default = Low -> RS485 mode
+	 * RTSn = RS485_DE: Default = Low -> RS485 transmitter disabled
+	 *        Configure as GPIO in U-Boot to keep disabled, Linux will change to RTSn
+	 */
+	{OFFSET(gpmc_wait0), (MODE(6) | PULLUDEN | PULLUP_EN | RXACTIVE)},	/* (T17) UART4_RXD */
+	{OFFSET(gpmc_wpn), (MODE(6) | PULLUDEN | PULLUP_EN | SLEWCTRL)},	/* (U17) UART4_TXD */
+	{OFFSET(lcd_data12), (MODE(7) | PULLUDEN | PULLDOWN_EN)},		/* (V2) uart4_ctsn */
+	{OFFSET(lcd_data13), (MODE(7) | PULLUDEN | PULLDOWN_EN)},		/* (V3) uart4_rtsn */
 	{-1}
 };
 
@@ -268,7 +297,22 @@ void enable_uart2_pin_mux(void)
 	configure_module_pin_mux(uart2_pin_mux);
 }
 
+void enable_uart4_pin_mux(void)
+{
+	configure_module_pin_mux(uart4_pin_mux);
+}
+
 void enable_spi1_mux(void)
 {
 	configure_module_pin_mux(spi1_pin_mux);
 }
+
+void enable_led_mux(void)
+{
+	configure_module_pin_mux(led_pin_mux);
+}
+
+void enable_led_mux_v32(void)
+{
+	configure_module_pin_mux(led_pin_mux_v32);
+}

board/nm/nmhw21/reset_reason.c

@@ -0,0 +1,81 @@
+/*
+ * reset_reason.c
+ *
+ * Reset/start reason handling
+ *
+ * Copyright (C) 2021 NetModule AG - https://www.netmodule.com/
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <common.h>
+#include "../common/ether_crc.h"
+#include "reset_reason.h"
+
+
+void rr_set_reset_reason(volatile struct reset_registers* reset_regs, uint32_t reason)
+{
+	reset_regs->rr_value = reason;
+	reset_regs->rr_value_crc = ether_crc(sizeof(reset_regs->rr_value),
+					     (const uint8_t*)&(reset_regs->rr_value));
+}
+
+bool rr_is_reset_reason_valid(volatile const struct reset_registers* reset_regs)
+{
+	const uint32_t crc = ether_crc(sizeof(reset_regs->rr_value), 
+				       (const uint8_t*)&(reset_regs->rr_value));
+	return crc == reset_regs->rr_value_crc;
+}
+
+void rr_set_start_reason(volatile struct reset_registers* reset_regs, uint32_t event)
+{
+	/* Store start events in shared memory region for OS */
+	reset_regs->sr_magic = SR_MAGIC;
+	reset_regs->sr_events = event;
+	reset_regs->sr_checksum = ether_crc(sizeof(reset_regs->sr_events),
+					    (const uint8_t*)&(reset_regs->sr_events));	
+}
+
+bool rr_is_start_reason_valid(volatile const struct reset_registers* reset_regs)
+{
+	if (reset_regs->sr_magic == SR_MAGIC) {
+		const uint32_t crc = ether_crc(sizeof(reset_regs->sr_events), 
+					(const uint8_t*)&(reset_regs->sr_events));
+		if (crc == reset_regs->sr_checksum) {
+			return true;
+		}
+	}
+	
+	return false;
+}
+
+void rr_start_reason_to_str(uint32_t events, char* buffer, size_t bufsize)
+{
+	if (events == 0) {
+		strncpy(buffer, "-\n", bufsize);
+	}
+	else {
+		buffer[0] = 0;
+		if (events & SR_POR)
+			strncat(buffer, "PowerOn, ", bufsize);
+		if (events & SR_WATCHDOG)
+			strncat(buffer, "Watchdog, ", bufsize);
+		if (events & SR_REBOOT)
+			strncat(buffer, "Reboot, ", bufsize);
+		if (events & SR_WAKEUP)
+			strncat(buffer, "Wakeup, ", bufsize);
+
+		if (events & SR_EVT_IGNITION)
+			strncat(buffer, "Ignition, ", bufsize);
+		if (events & SR_EVT_RTC_ALARM)
+			strncat(buffer, "RTC, ", bufsize);
+		if (events & SR_EVT_RTC_TICK)
+			strncat(buffer, "Tick, ", bufsize);
+		if (events & SR_EVT_GPI)
+			strncat(buffer, "GPI, ", bufsize);
+		if (events & SR_EVT_BUTTON)
+			strncat(buffer, "Button, ", bufsize);
+
+		/* Trim last comma, no 0 len check required, at least one entry is present */
+		buffer[strlen(buffer)-2] = 0;
+	}
+}

board/nm/nmhw21/reset_reason.h

@@ -0,0 +1,60 @@
+/*
+ * reset_reason.h
+ *
+ * Reset/start reason handling
+ *
+ * Copyright (C) 2021 NetModule AG - https://www.netmodule.com/
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef RESET_REASON_H
+#define RESET_REASON_H
+
+struct reset_registers {
+	/* Reboot Reasons, set by OS, expect watchdog set by bootloader */
+	uint32_t rr_value;
+	uint32_t rr_value_crc;
+
+	/* Start Reasons as determined by hardware */
+	uint32_t sr_magic;	/* Token to check presence of following fields */
+	uint32_t sr_events;	/* Events bitmask, see SE_... defines */
+	uint32_t sr_checksum;	/* Checksum over se_events */
+};
+
+/* Watchdog reboot reason event */
+#define RR_POWEROFF_PATTERN		0x00000000
+#define RR_EXTERNAL_WATCHDOG_PATTERN	0x781f9ce2
+#define RR_BOOT_PATTERN			0x424f4f54	/* ‘BOOT’, 0xb9808470 */
+#define RR_REBOOT_PATTERN		0x5245424f	/* ‘REBO’, 0x7d5d9d66 */
+#define RR_OOPS_PATTERN			0x4F4F5053	/* ‘OOPS’, 0x2b85bc5f */
+#define RR_WAKE_PATTERN			0x57414B45	/* 'WAKE', 0x7b0acb48 */
+
+/* Start reason token 'SRTE' */
+#define SR_MAGIC			0x53525445
+
+/* Possible start events (see sr_events) */
+#define SR_POR  			0x00000001
+#define SR_WATCHDOG  			0x00000010
+#define SR_REBOOT  			0x00000020
+#define SR_WAKEUP  			0x00000080	/* See SR_EVT_xx bits */
+
+/* In case of wake-up, these are the events that caused the start */
+#define SR_EVT_IGNITION  		0x00000100
+#define SR_EVT_RTC_ALARM  		0x00000200	/* RTC date/time alarm */
+#define SR_EVT_RTC_TICK  		0x00000400	/* RTC tick based alarm */
+#define SR_EVT_GPI			0x00000800	/* General purpose input(s) */
+#define SR_EVT_BUTTON			0x00001000	
+#define SR_EVT_WAKE_MASK		0x00001F00
+
+
+
+extern void rr_set_reset_reason(volatile struct reset_registers* reset_regs, uint32_t reason);
+extern bool rr_is_reset_reason_valid(volatile const struct reset_registers* reset_regs);
+
+extern void rr_set_start_reason(volatile struct reset_registers* reset_regs, uint32_t event);
+extern bool rr_is_start_reason_valid(volatile const struct reset_registers* reset_regs);
+extern void rr_start_reason_to_str(uint32_t events, char* buffer, size_t bufsize);
+
+
+#endif /* RESET_REASON_H */

board/nm/nrhw20/board.c

@@ -1330,10 +1330,10 @@ end: ;
 static void ft_comio_gpios(void *blob)
 {
 	/* gpio0_7: COM/IO relay output */
-	ft_set_gpio_name(blob, "/ocp/gpio@44e07000", 7, "COMIO_OUT0");
+	ft_set_gpio_name(blob, "gpio0", 7, "COMIO_OUT0");
 
 	/* gpio1_8: COM/IO digital input */
-	ft_set_gpio_name(blob, "/ocp/gpio@4804c000", 8, "COMIO_IN0");
+	ft_set_gpio_name(blob, "gpio1", 8, "COMIO_IN0");
 }
 
 static void ft_shields(void* blob)
@@ -1345,15 +1345,13 @@ static void ft_shields(void* blob)
 		case SHIELD_COM_IO:
 			ft_comio_gpios(blob);
 			ft_enable_node(blob, "/netbox_dio_comio");
-			/* TODO: Should use alias serial0 */
+			ft_enable_node(blob, "serial0");
-			ft_enable_node(blob, "/ocp/serial@44e09000");
 			break;
 
 		case SHIELD_DUALCAN:
 		case SHIELD_DUALCAN_PASSIVE:
-			/* TODO: Should use alias d_can0, d_can1 */
+			ft_enable_node(blob, "d-can0");
-			ft_enable_node(blob, "/ocp/can@481cc000");
+			ft_enable_node(blob, "d-can1");
-			ft_enable_node(blob, "/ocp/can@481d0000");
 			break;
 
 		default:

board/nm/nrhw24/board.c

@@ -1242,10 +1242,10 @@ end: ;
 static void ft_comio_gpios(void *blob)
 {
 	/* gpio0_7: COM/IO relay output */
-	ft_set_gpio_name(blob, "/ocp/gpio@44e07000", 7, "COMIO_OUT0");
+	ft_set_gpio_name(blob, "gpio0", 7, "COMIO_OUT0");
 
 	/* gpio1_8: COM/IO digital input */
-	ft_set_gpio_name(blob, "/ocp/gpio@4804c000", 8, "COMIO_IN0");
+	ft_set_gpio_name(blob, "gpio1", 8, "COMIO_IN0");
 }
 
 static void ft_shields(void* blob)
@@ -1257,15 +1257,13 @@ static void ft_shields(void* blob)
 		case SHIELD_COM_IO:
 			ft_comio_gpios(blob);
 			ft_enable_node(blob, "/netbox_dio_comio");
-			/* TODO: Should use alias serial0 */
+			ft_enable_node(blob, "serial0");
-			ft_enable_node(blob, "/ocp/serial@44e09000");
 			break;
 
 		case SHIELD_DUALCAN:
 		case SHIELD_DUALCAN_PASSIVE:
-			/* TODO: Should use alias d_can0, d_can1 */
+			ft_enable_node(blob, "d-can0");
-			ft_enable_node(blob, "/ocp/can@481cc000");
+			ft_enable_node(blob, "d-can1");
-			ft_enable_node(blob, "/ocp/can@481d0000");
 			break;
 
 		default:
@@ -1273,7 +1271,7 @@ static void ft_shields(void* blob)
 			 * Enable uart1 (ttyS0) always as kernel needs it as fallback console, 
 			 * if (ttyS1) is not available as console.
 			 */
-			ft_enable_node(blob, "/ocp/serial@44e09000");
+			ft_enable_node(blob, "serial0");
 			break;
 	};