Merge https://gitlab.denx.de/u-boot/custodians/u-boot-fsl-qoriq

Update and fixes for sl28, lx2, pblimage generation for some powerpc
products

MAINTAINERS

@@ -1161,6 +1161,13 @@ S:	Maintained
 T:	git https://source.denx.de/u-boot/custodians/u-boot-sh.git
 F:	arch/sh/
 
+SL28CLPD
+M:	Michael Walle <michael@walle.cc>
+S:	Maintained
+F:	drivers/gpio/sl28cpld-gpio.c
+F:	drivers/misc/sl28cpld.c
+F:	drivers/watchdog/sl28cpld-wdt.c
+
 SPI
 M:	Jagan Teki <jagan@amarulasolutions.com>
 S:	Maintained

Makefile

@@ -1411,7 +1411,7 @@ MKIMAGEFLAGS_u-boot-spl.kwb = -n $(KWD_CONFIG_FILE) \
 	$(if $(KEYDIR),-k $(KEYDIR))
 
 MKIMAGEFLAGS_u-boot.pbl = -n $(srctree)/$(CONFIG_SYS_FSL_PBL_RCW:"%"=%) \
-		-R $(srctree)/$(CONFIG_SYS_FSL_PBL_PBI:"%"=%) -T pblimage
+		-R $(srctree)/$(CONFIG_SYS_FSL_PBL_PBI:"%"=%) -A $(ARCH) -T pblimage
 
 ifeq ($(CONFIG_MPC85xx)$(CONFIG_OF_SEPARATE),yy)
 UBOOT_BIN := u-boot-with-dtb.bin

arch/arm/dts/fsl-ls1028a-kontron-sl28-u-boot.dtsi

@@ -27,6 +27,7 @@
 		fit {
 			offset = <CONFIG_SPL_PAD_TO>;
 			description = "FIT image with multiple configurations";
+			fit,fdt-list = "of-list";
 
 			images {
 				uboot {
@@ -41,95 +42,20 @@
 					};
 				};
 
-				fdt-1 {
-					description = "fsl-ls1028a-kontron-sl28";
+				@fdt-SEQ {
+					description = "NAME";
 					type = "flat_dt";
-					arch = "arm";
 					compression = "none";
-
-					blob {
-						filename = "arch/arm/dts/fsl-ls1028a-kontron-sl28.dtb";
-					};
-				};
-
-				fdt-2 {
-					description = "fsl-ls1028a-kontron-sl28-var1";
-					type = "flat_dt";
-					arch = "arm";
-					compression = "none";
-
-					blob {
-						filename = "arch/arm/dts/fsl-ls1028a-kontron-sl28-var1.dtb";
-					};
-				};
-
-				fdt-3 {
-					description = "fsl-ls1028a-kontron-sl28-var2";
-					type = "flat_dt";
-					arch = "arm";
-					compression = "none";
-
-					blob {
-						filename = "arch/arm/dts/fsl-ls1028a-kontron-sl28-var2.dtb";
-					};
-				};
-
-				fdt-4 {
-					description = "fsl-ls1028a-kontron-sl28-var3";
-					type = "flat_dt";
-					arch = "arm";
-					compression = "none";
-
-					blob {
-						filename = "arch/arm/dts/fsl-ls1028a-kontron-sl28-var3.dtb";
-					};
-				};
-
-				fdt-5 {
-					description = "fsl-ls1028a-kontron-sl28-var4";
-					type = "flat_dt";
-					arch = "arm";
-					compression = "none";
-
-					blob {
-						filename = "arch/arm/dts/fsl-ls1028a-kontron-sl28-var4.dtb";
-					};
 				};
 			};
 
 			configurations {
-				default = "conf-1";
+				default = "@config-DEFAULT-SEQ";
 
-				conf-1 {
-					description = "fsl-ls1028a-kontron-sl28";
+				@config-SEQ {
+					description = "NAME";
 					firmware = "uboot";
-					fdt = "fdt-1";
-				};
-
-				conf-2 {
-					description = "fsl-ls1028a-kontron-sl28-var1";
-					firmware = "uboot";
-					fdt = "fdt-2";
-				};
-
-				conf-3 {
-					description = "fsl-ls1028a-kontron-sl28-var2";
-					firmware = "uboot";
-					fdt = "fdt-3";
-				};
-
-				conf-4 {
-					description = "fsl-ls1028a-kontron-sl28-var3";
-					firmware = "uboot";
-					loadables = "uboot";
-					fdt = "fdt-4";
-				};
-
-				conf-5 {
-					description = "fsl-ls1028a-kontron-sl28-var4";
-					firmware = "uboot";
-					loadables = "uboot";
-					fdt = "fdt-5";
+					fdt = "fdt-SEQ";
 				};
 			};
 		};
@@ -189,27 +115,7 @@
 		};
 
 		configurations {
-			conf-1 {
-				firmware = "bl31";
-				loadables = "uboot";
-			};
-
-			conf-2 {
-				firmware = "bl31";
-				loadables = "uboot";
-			};
-
-			conf-3 {
-				firmware = "bl31";
-				loadables = "uboot";
-			};
-
-			conf-4 {
-				firmware = "bl31";
-				loadables = "uboot";
-			};
-
-			conf-5 {
+			@config-SEQ {
 				firmware = "bl31";
 				loadables = "uboot";
 			};
@@ -238,23 +144,7 @@
 		};
 
 		configurations {
-			conf-1 {
-				loadables = "uboot", "bl32";
-			};
-
-			conf-2 {
-				loadables = "uboot", "bl32";
-			};
-
-			conf-3 {
-				loadables = "uboot", "bl32";
-			};
-
-			conf-4 {
-				loadables = "uboot", "bl32";
-			};
-
-			conf-5 {
+			@config-SEQ {
 				loadables = "uboot", "bl32";
 			};
 		};

board/kontron/sl28/sl28.c

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0+
 
 #include <common.h>
+#include <dm.h>
 #include <malloc.h>
 #include <errno.h>
 #include <fsl_ddr.h>
@@ -14,7 +15,9 @@
 #include <asm/arch/soc.h>
 #include <fsl_immap.h>
 #include <netdev.h>
+#include <wdt.h>
 
+#include <sl28cpld.h>
 #include <fdtdec.h>
 #include <miiphy.h>
 
@@ -39,16 +42,68 @@ int board_eth_init(struct bd_info *bis)
 	return pci_eth_init(bis);
 }
 
+static int __sl28cpld_read(uint reg)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = uclass_get_device_by_driver(UCLASS_NOP,
+					  DM_DRIVER_GET(sl28cpld), &dev);
+	if (ret)
+		return ret;
+
+	return sl28cpld_read(dev, reg);
+}
+
+static void print_cpld_version(void)
+{
+	int version = __sl28cpld_read(SL28CPLD_VERSION);
+
+	if (version < 0)
+		printf("CPLD:  error reading version (%d)\n", version);
+	else
+		printf("CPLD:  v%d\n", version);
+}
+
 int checkboard(void)
 {
 	printf("EL:    %d\n", current_el());
+	if (CONFIG_IS_ENABLED(SL28CPLD))
+		print_cpld_version();
+
+	return 0;
+}
+
+static void stop_recovery_watchdog(void)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = uclass_get_device_by_driver(UCLASS_WDT,
+					  DM_DRIVER_GET(sl28cpld_wdt), &dev);
+	if (!ret)
+		wdt_stop(dev);
+}
+
+int fsl_board_late_init(void)
+{
+	/*
+	 * Usually, the after a board reset, the watchdog is enabled by
+	 * default. This is to supervise the bootloader boot-up. Therefore,
+	 * to prevent a watchdog reset if we don't actively kick it, we have
+	 * to disable it.
+	 *
+	 * If the watchdog isn't enabled at reset (which is a configuration
+	 * option) disabling it doesn't hurt either.
+	 */
+	if (!CONFIG_IS_ENABLED(WATCHDOG_AUTOSTART))
+		stop_recovery_watchdog();
+
 	return 0;
 }
 
 void detail_board_ddr_info(void)
 {
-	puts("\nDDR    ");
-	print_size(gd->bd->bi_dram[0].size + gd->bd->bi_dram[1].size, "");
 	print_ddr_info(0);
 }
 

configs/kontron_sl28_defconfig

@@ -42,23 +42,23 @@ CONFIG_CMD_GREPENV=y
 CONFIG_CMD_NVEDIT_EFI=y
 CONFIG_CMD_DFU=y
 CONFIG_CMD_DM=y
+CONFIG_CMD_GPIO=y
 CONFIG_CMD_GPT=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_PCI=y
 CONFIG_CMD_USB=y
 CONFIG_CMD_USB_MASS_STORAGE=y
+CONFIG_CMD_WDT=y
 CONFIG_CMD_CACHE=y
 CONFIG_CMD_EFIDEBUG=y
 CONFIG_CMD_RNG=y
 CONFIG_OF_CONTROL=y
 CONFIG_SPL_OF_CONTROL=y
-CONFIG_OF_LIST=""
+CONFIG_OF_LIST="fsl-ls1028a-kontron-sl28 fsl-ls1028a-kontron-sl28-var1 fsl-ls1028a-kontron-sl28-var2 fsl-ls1028a-kontron-sl28-var3 fsl-ls1028a-kontron-sl28-var4"
 CONFIG_ENV_OVERWRITE=y
 CONFIG_ENV_IS_IN_SPI_FLASH=y
 CONFIG_SYS_REDUNDAND_ENVIRONMENT=y
-CONFIG_NET_RANDOM_ETHADDR=y
-CONFIG_NETCONSOLE=y
 CONFIG_SPL_DM_SEQ_ALIAS=y
 CONFIG_SATA=y
 CONFIG_SCSI_AHCI=y
@@ -69,8 +69,10 @@ CONFIG_DDR_ECC=y
 CONFIG_ECC_INIT_VIA_DDRCONTROLLER=y
 CONFIG_DFU_MMC=y
 CONFIG_DFU_SF=y
+CONFIG_SL28CPLD_GPIO=y
 CONFIG_I2C_SET_DEFAULT_BUS_NUM=y
 CONFIG_I2C_MUX=y
+CONFIG_SL28CPLD=y
 CONFIG_MMC_HS400_SUPPORT=y
 CONFIG_FSL_ESDHC=y
 CONFIG_FSL_ESDHC_SUPPORT_ADMA2=y
@@ -102,6 +104,11 @@ CONFIG_USB_DWC3=y
 CONFIG_USB_DWC3_LAYERSCAPE=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_DOWNLOAD=y
+# CONFIG_WATCHDOG is not set
+# CONFIG_WATCHDOG_AUTOSTART is not set
+CONFIG_WDT=y
+CONFIG_WDT_SL28CPLD=y
+CONFIG_WDT_SP805=y
 CONFIG_OF_LIBFDT_ASSUME_MASK=0x0
 CONFIG_OF_LIBFDT_OVERLAY=y
 CONFIG_EFI_SET_TIME=y

doc/board/kontron/sl28.rst

@@ -23,34 +23,17 @@ Copy u-boot.rom to a TFTP server.
 Install the bootloader on the board
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Please note, this bootloader doesn't support the builtin watchdog (yet),
-therefore you have to disable it, see below. Otherwise you'll end up in
-the failsafe bootloader on every reset::
+To install the bootloader binary use the following command::
 
  > tftp path/to/u-boot.rom
  > sf probe 0
  > sf update $fileaddr 0x210000 $filesize
 
-The board is fully failsafe, you can't break anything. But because you've
-disabled the builtin watchdog you might have to manually enter failsafe
-mode by asserting the ``FORCE_RECOV#`` line during board reset.
-
-Disable the builtin watchdog
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-- boot into the failsafe bootloader, either by asserting the
-  ``FORCE_RECOV#`` line or if you still have the original bootloader
-  installed you can use the command::
-
-  > wdt dev cpld_watchdog@4a; wdt expire 1
-
-- in the failsafe bootloader use the "sl28 nvm" command to disable
-  the automatic start of the builtin watchdog::
-
-  > sl28 nvm 0008
-
-- power-cycle the board
-
+The board is fully failsafe, you can't break anything. If builtin watchdog
+is enabled, you'll automatically end up in the failsafe bootloader if
+something goes wrong. If the watchdog is disabled, you have to manually
+enter failsafe mode by asserting the ``FORCE_RECOV#`` line during board
+reset.
 
 Update image
 ------------
@@ -67,20 +50,41 @@ Afterward you can copy this file to your ESP into the /EFI/UpdateCapsule/
 folder. On the next EFI boot this will automatically update your
 bootloader.
 
-Useful I2C tricks
------------------
+Builtin watchdog
+----------------
 
-The board has a board management controller which is not supported in
-u-boot (yet). But you can use the i2c command to access it.
+The builtin watchdog will supervise the bootloader startup. If anything
+goes wrong it will reset the board and boot into the failsafe bootloader.
 
-- reset into failsafe bootloader::
+Once the bootloader is started successfully, it will disable the watchdog
+timer.
 
-  > i2c mw 4a 5.1 0; i2c mw 4a 6.1 6b; i2c mw 4a 4.1 42
+wdt command flags
+^^^^^^^^^^^^^^^^^
 
-- read board management controller version::
+The `wdt start` as well as the `wdt expire` command take a flags argument.
+The supported bitmask is as follows.
 
-  > i2c md 4a 3.1 1
+| Bit | Description                   |
+| --- | ----------------------------- |
+|   0 | Enable failsafe mode          |
+|   1 | Lock the control register     |
+|   2 | Disable board reset           |
+|   3 | Enable WDT_TIME_OUT# line     |
 
+For example, you can use `wdt expire 1` to issue a reset and boot into the
+failsafe bootloader.
+
+Disable the builtin watchdog
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+If for some reason, this isn't a desired behavior, the watchdog can also
+be configured to not be enabled on board reset. It's configuration is saved
+in the non-volatile board configuration bits. To change these you can use
+the `sl28 nvm` command.
+
+For more information on the non-volatile board configuration bits, see the
+following section.
 
 Non-volatile Board Configuration Bits
 -------------------------------------

drivers/gpio/Kconfig

@@ -544,4 +544,10 @@ config ZYNQMP_GPIO_MODEPIN
 	  are accessed using xilinx firmware. In modepin register, [3:0] bits
 	  set direction, [7:4] bits read IO, [11:8] bits set/clear IO.
 
+config SL28CPLD_GPIO
+	bool "Kontron sl28cpld GPIO driver"
+	depends on DM_GPIO && SL28CPLD
+	help
+	  Support GPIO access on Kontron sl28cpld board management controllers.
+
 endif

drivers/gpio/Makefile

@@ -70,4 +70,5 @@ obj-$(CONFIG_NX_GPIO)		+= nx_gpio.o
 obj-$(CONFIG_SIFIVE_GPIO)	+= sifive-gpio.o
 obj-$(CONFIG_NOMADIK_GPIO)	+= nmk_gpio.o
 obj-$(CONFIG_MAX7320_GPIO)	+= max7320_gpio.o
+obj-$(CONFIG_SL28CPLD_GPIO)	+= sl28cpld-gpio.o
 obj-$(CONFIG_ZYNQMP_GPIO_MODEPIN)	+= zynqmp_gpio_modepin.o

drivers/gpio/sl28cpld-gpio.c

@@ -0,0 +1,165 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * GPIO driver for the sl28cpld
+ *
+ * Copyright (c) 2021 Michael Walle <michael@walle.cc>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <asm/gpio.h>
+#include <sl28cpld.h>
+
+/* GPIO flavor */
+#define SL28CPLD_GPIO_DIR	0x00
+#define SL28CPLD_GPIO_OUT	0x01
+#define SL28CPLD_GPIO_IN	0x02
+
+/* input-only flavor */
+#define SL28CPLD_GPI_IN		0x00
+
+/* output-only flavor */
+#define SL28CPLD_GPO_OUT	0x00
+
+enum {
+	SL28CPLD_GPIO,
+	SL28CPLD_GPI,
+	SL28CPLD_GPO,
+};
+
+static int sl28cpld_gpio_get_value(struct udevice *dev, unsigned int gpio)
+{
+	ulong type = dev_get_driver_data(dev);
+	int val, reg;
+
+	switch (type) {
+	case SL28CPLD_GPIO:
+		reg = SL28CPLD_GPIO_IN;
+		break;
+	case SL28CPLD_GPI:
+		reg = SL28CPLD_GPI_IN;
+		break;
+	case SL28CPLD_GPO:
+		/* we are output only, thus just return the output value */
+		reg = SL28CPLD_GPO_OUT;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	val = sl28cpld_read(dev, reg);
+
+	return val < 0 ? val : !!(val & BIT(gpio));
+}
+
+static int sl28cpld_gpio_set_value(struct udevice *dev, unsigned int gpio,
+				   int value)
+{
+	ulong type = dev_get_driver_data(dev);
+	uint reg;
+
+	switch (type) {
+	case SL28CPLD_GPIO:
+		reg = SL28CPLD_GPIO_OUT;
+		break;
+	case SL28CPLD_GPO:
+		reg = SL28CPLD_GPO_OUT;
+		break;
+	case SL28CPLD_GPI:
+	default:
+		return -EINVAL;
+	}
+
+	if (value)
+		return sl28cpld_update(dev, reg, 0, BIT(gpio));
+	else
+		return sl28cpld_update(dev, reg, BIT(gpio), 0);
+}
+
+static int sl28cpld_gpio_direction_input(struct udevice *dev, unsigned int gpio)
+{
+	ulong type = dev_get_driver_data(dev);
+
+	switch (type) {
+	case SL28CPLD_GPI:
+		return 0;
+	case SL28CPLD_GPIO:
+		return sl28cpld_update(dev, SL28CPLD_GPIO_DIR, BIT(gpio), 0);
+	case SL28CPLD_GPO:
+	default:
+		return -EINVAL;
+	}
+}
+
+static int sl28cpld_gpio_direction_output(struct udevice *dev,
+					  unsigned int gpio, int value)
+{
+	ulong type = dev_get_driver_data(dev);
+	int ret;
+
+	/* set_value() will report an error if we are input-only */
+	ret = sl28cpld_gpio_set_value(dev, gpio, value);
+	if (ret)
+		return ret;
+
+	if (type == SL28CPLD_GPIO)
+		return sl28cpld_update(dev, SL28CPLD_GPIO_DIR, 0, BIT(gpio));
+
+	return 0;
+}
+
+static int sl28cpld_gpio_get_function(struct udevice *dev, unsigned int gpio)
+{
+	ulong type = dev_get_driver_data(dev);
+	int val;
+
+	switch (type) {
+	case SL28CPLD_GPIO:
+		val = sl28cpld_read(dev, SL28CPLD_GPIO_DIR);
+		if (val < 0)
+			return val;
+		if (val & BIT(gpio))
+			return GPIOF_OUTPUT;
+		else
+			return GPIOF_INPUT;
+	case SL28CPLD_GPI:
+		return GPIOF_INPUT;
+	case SL28CPLD_GPO:
+		return GPIOF_OUTPUT;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct dm_gpio_ops sl28cpld_gpio_ops = {
+	.direction_input = sl28cpld_gpio_direction_input,
+	.direction_output = sl28cpld_gpio_direction_output,
+	.get_value = sl28cpld_gpio_get_value,
+	.set_value = sl28cpld_gpio_set_value,
+	.get_function = sl28cpld_gpio_get_function,
+};
+
+static int sl28cpld_gpio_probe(struct udevice *dev)
+{
+	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+
+	uc_priv->gpio_count = 8;
+	uc_priv->bank_name = dev_read_name(dev);
+
+	return 0;
+}
+
+static const struct udevice_id sl28cpld_gpio_ids[] = {
+	{ .compatible = "kontron,sl28cpld-gpio", .data = SL28CPLD_GPIO},
+	{ .compatible = "kontron,sl28cpld-gpo", .data = SL28CPLD_GPO},
+	{ .compatible = "kontron,sl28cpld-gpi", .data = SL28CPLD_GPI},
+	{ }
+};
+
+U_BOOT_DRIVER(sl28cpld_gpio) = {
+	.name	= "sl28cpld_gpio",
+	.id	= UCLASS_GPIO,
+	.of_match = sl28cpld_gpio_ids,
+	.probe	= sl28cpld_gpio_probe,
+	.ops	= &sl28cpld_gpio_ops,
+};

drivers/misc/Kconfig

@@ -512,4 +512,12 @@ config ESM_PMIC
 config FSL_IFC
 	bool
 
+config SL28CPLD
+	bool "Enable Kontron sl28cpld multi-function driver"
+	depends on DM_I2C
+	help
+	  Support for the Kontron sl28cpld management controller. This is
+	  the base driver which provides common access methods for the
+	  sub-drivers.
+
 endmenu

drivers/misc/Makefile

@@ -82,3 +82,4 @@ obj-$(CONFIG_MICROCHIP_FLEXCOM) += microchip_flexcom.o
 obj-$(CONFIG_K3_AVS0) += k3_avs.o
 obj-$(CONFIG_ESM_K3) += k3_esm.o
 obj-$(CONFIG_ESM_PMIC) += esm_pmic.o
+obj-$(CONFIG_SL28CPLD) += sl28cpld.o

drivers/misc/sl28cpld.c

@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2021 Michael Walle <michael@walle.cc>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <i2c.h>
+
+struct sl28cpld_child_plat {
+	uint offset;
+};
+
+/*
+ * The access methods works either with the first argument being a child
+ * device or with the MFD device itself.
+ */
+static int sl28cpld_read_child(struct udevice *dev, uint offset)
+{
+	struct sl28cpld_child_plat *plat = dev_get_parent_plat(dev);
+	struct udevice *mfd = dev_get_parent(dev);
+
+	return dm_i2c_reg_read(mfd, offset + plat->offset);
+}
+
+int sl28cpld_read(struct udevice *dev, uint offset)
+{
+	if (dev->driver == DM_DRIVER_GET(sl28cpld))
+		return dm_i2c_reg_read(dev, offset);
+	else
+		return sl28cpld_read_child(dev, offset);
+}
+
+static int sl28cpld_write_child(struct udevice *dev, uint offset,
+				uint8_t value)
+{
+	struct sl28cpld_child_plat *plat = dev_get_parent_plat(dev);
+	struct udevice *mfd = dev_get_parent(dev);
+
+	return dm_i2c_reg_write(mfd, offset + plat->offset, value);
+}
+
+int sl28cpld_write(struct udevice *dev, uint offset, uint8_t value)
+{
+	if (dev->driver == DM_DRIVER_GET(sl28cpld))
+		return dm_i2c_reg_write(dev, offset, value);
+	else
+		return sl28cpld_write_child(dev, offset, value);
+}
+
+int sl28cpld_update(struct udevice *dev, uint offset, uint8_t clear,
+		    uint8_t set)
+{
+	int val;
+
+	val = sl28cpld_read(dev, offset);
+	if (val < 0)
+		return val;
+
+	val &= ~clear;
+	val |= set;
+
+	return sl28cpld_write(dev, offset, val);
+}
+
+static int sl28cpld_probe(struct udevice *dev)
+{
+	i2c_set_chip_flags(dev, DM_I2C_CHIP_RD_ADDRESS |
+			   DM_I2C_CHIP_WR_ADDRESS);
+
+	return 0;
+}
+
+static int sl28cpld_child_post_bind(struct udevice *dev)
+{
+	struct sl28cpld_child_plat *plat = dev_get_parent_plat(dev);
+	int offset;
+
+	if (!dev_has_ofnode(dev))
+		return 0;
+
+	offset = dev_read_u32_default(dev, "reg", -1);
+	if (offset == -1)
+		return -EINVAL;
+
+	plat->offset = offset;
+
+	return 0;
+}
+
+static const struct udevice_id sl28cpld_ids[] = {
+	{ .compatible = "kontron,sl28cpld" },
+	{}
+};
+
+U_BOOT_DRIVER(sl28cpld) = {
+	.name		= "sl28cpld",
+	.id		= UCLASS_NOP,
+	.of_match	= sl28cpld_ids,
+	.probe		= sl28cpld_probe,
+	.bind		= dm_scan_fdt_dev,
+	.flags		= DM_FLAG_PRE_RELOC,
+	.per_child_plat_auto = sizeof(struct sl28cpld_child_plat),
+	.child_post_bind = sl28cpld_child_post_bind,
+};

drivers/watchdog/Kconfig

@@ -266,6 +266,13 @@ config WDT_SBSA
 	   In the single stage mode, when the timeout is reached, your system
 	   will be reset by WS1. The first signal (WS0) is ignored.
 
+config WDT_SL28CPLD
+	bool "sl28cpld watchdog timer support"
+	depends on WDT && SL28CPLD
+	help
+	  Enable support for the watchdog timer in the Kontron sl28cpld
+	  management controller.
+
 config WDT_SP805
 	bool "SP805 watchdog timer support"
 	depends on WDT

drivers/watchdog/Makefile

@@ -35,6 +35,7 @@ obj-$(CONFIG_WDT_OCTEONTX) += octeontx_wdt.o
 obj-$(CONFIG_WDT_OMAP3) += omap_wdt.o
 obj-$(CONFIG_WDT_SBSA) += sbsa_gwdt.o
 obj-$(CONFIG_WDT_K3_RTI) += rti_wdt.o
+obj-$(CONFIG_WDT_SL28CPLD) += sl28cpld-wdt.o
 obj-$(CONFIG_WDT_SP805) += sp805_wdt.o
 obj-$(CONFIG_WDT_STM32MP) += stm32mp_wdt.o
 obj-$(CONFIG_WDT_SUNXI) += sunxi_wdt.o

drivers/watchdog/sl28cpld-wdt.c

@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Watchdog driver for the sl28cpld
+ *
+ * Copyright (c) 2021 Michael Walle <michael@walle.cc>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <wdt.h>
+#include <sl28cpld.h>
+#include <div64.h>
+
+#define SL28CPLD_WDT_CTRL		0x00
+#define  WDT_CTRL_EN0			BIT(0)
+#define  WDT_CTRL_EN1			BIT(1)
+#define  WDT_CTRL_EN_MASK		GENMASK(1, 0)
+#define  WDT_CTRL_LOCK			BIT(2)
+#define  WDT_CTRL_ASSERT_SYS_RESET	BIT(6)
+#define  WDT_CTRL_ASSERT_WDT_TIMEOUT	BIT(7)
+#define SL28CPLD_WDT_TIMEOUT		0x01
+#define SL28CPLD_WDT_KICK		0x02
+#define  WDT_KICK_VALUE			0x6b
+
+static int sl28cpld_wdt_reset(struct udevice *dev)
+{
+	return sl28cpld_write(dev, SL28CPLD_WDT_KICK, WDT_KICK_VALUE);
+}
+
+static int sl28cpld_wdt_start(struct udevice *dev, u64 timeout, ulong flags)
+{
+	int ret, val;
+
+	val = sl28cpld_read(dev, SL28CPLD_WDT_CTRL);
+	if (val < 0)
+		return val;
+
+	/* (1) disable watchdog */
+	val &= ~WDT_CTRL_EN_MASK;
+	ret = sl28cpld_write(dev, SL28CPLD_WDT_CTRL, val);
+	if (ret)
+		return ret;
+
+	/* (2) set timeout */
+	ret = sl28cpld_write(dev, SL28CPLD_WDT_TIMEOUT, lldiv(timeout, 1000));
+	if (ret)
+		return ret;
+
+	/* (3) kick it, will reset timer to the timeout value */
+	ret = sl28cpld_wdt_reset(dev);
+	if (ret)
+		return ret;
+
+	/* (4) enable either recovery or normal one */
+	if (flags & BIT(0))
+		val |= WDT_CTRL_EN1;
+	else
+		val |= WDT_CTRL_EN0;
+
+	if (flags & BIT(1))
+		val |= WDT_CTRL_LOCK;
+
+	if (flags & BIT(2))
+		val &= ~WDT_CTRL_ASSERT_SYS_RESET;
+	else
+		val |= WDT_CTRL_ASSERT_SYS_RESET;
+
+	if (flags & BIT(3))
+		val |= WDT_CTRL_ASSERT_WDT_TIMEOUT;
+	else
+		val &= ~WDT_CTRL_ASSERT_WDT_TIMEOUT;
+
+	return sl28cpld_write(dev, SL28CPLD_WDT_CTRL, val);
+}
+
+static int sl28cpld_wdt_stop(struct udevice *dev)
+{
+	int val;
+
+	val = sl28cpld_read(dev, SL28CPLD_WDT_CTRL);
+	if (val < 0)
+		return val;
+
+	return sl28cpld_write(dev, SL28CPLD_WDT_CTRL, val & ~WDT_CTRL_EN_MASK);
+}
+
+static int sl28cpld_wdt_expire_now(struct udevice *dev, ulong flags)
+{
+	return sl28cpld_wdt_start(dev, 0, flags);
+}
+
+static const struct wdt_ops sl28cpld_wdt_ops = {
+	.start = sl28cpld_wdt_start,
+	.reset = sl28cpld_wdt_reset,
+	.stop = sl28cpld_wdt_stop,
+	.expire_now = sl28cpld_wdt_expire_now,
+};
+
+static const struct udevice_id sl28cpld_wdt_ids[] = {
+	{ .compatible = "kontron,sl28cpld-wdt", },
+	{}
+};
+
+U_BOOT_DRIVER(sl28cpld_wdt) = {
+	.name = "sl28cpld-wdt",
+	.id = UCLASS_WDT,
+	.of_match = sl28cpld_wdt_ids,
+	.ops = &sl28cpld_wdt_ops,
+};

include/configs/lx2160a_common.h

@@ -244,12 +244,36 @@
 		"run distro_bootcmd;run sd2_bootcmd;"		\
 		"env exists secureboot && esbc_halt;"
 
+#ifdef CONFIG_CMD_USB
+#define BOOT_TARGET_DEVICES_USB(func) func(USB, usb, 0)
+#else
+#define BOOT_TARGET_DEVICES_USB(func)
+#endif
+
+#ifdef CONFIG_MMC
+#define BOOT_TARGET_DEVICES_MMC(func, instance) func(MMC, mmc, instance)
+#else
+#define BOOT_TARGET_DEVICES_MMC(func)
+#endif
+
+#ifdef CONFIG_SCSI
+#define BOOT_TARGET_DEVICES_SCSI(func) func(SCSI, scsi, 0)
+#else
+#define BOOT_TARGET_DEVICES_SCSI(func)
+#endif
+
+#ifdef CONFIG_CMD_DHCP
+#define BOOT_TARGET_DEVICES_DHCP(func) func(DHCP, dhcp, na)
+#else
+#define BOOT_TARGET_DEVICES_DHCP(func)
+#endif
+
 #define BOOT_TARGET_DEVICES(func) \
-	func(USB, usb, 0) \
-	func(MMC, mmc, 0) \
-	func(MMC, mmc, 1) \
-	func(SCSI, scsi, 0) \
-	func(DHCP, dhcp, na)
+	BOOT_TARGET_DEVICES_USB(func) \
+	BOOT_TARGET_DEVICES_MMC(func, 0) \
+	BOOT_TARGET_DEVICES_MMC(func, 1) \
+	BOOT_TARGET_DEVICES_SCSI(func) \
+	BOOT_TARGET_DEVICES_DHCP(func)
 #include <config_distro_bootcmd.h>
 
 #endif /* __LX2_COMMON_H */

include/sl28cpld.h

@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (c) 2021 Michael Walle <michael@walle.cc>
+ */
+
+#ifndef __SL28CPLD_H
+#define __SL28CPLD_H
+
+#define SL28CPLD_VERSION	0x03
+
+int sl28cpld_read(struct udevice *dev, uint offset);
+int sl28cpld_write(struct udevice *dev, uint offset, uint8_t value);
+int sl28cpld_update(struct udevice *dev, uint offset, uint8_t clear,
+		    uint8_t set);
+
+#endif

tools/pblimage.c

@@ -230,19 +230,25 @@ static int pblimage_verify_header(unsigned char *ptr, int image_size,
 			struct image_tool_params *params)
 {
 	struct pbl_header *pbl_hdr = (struct pbl_header *) ptr;
+	uint32_t rcwheader;
+
+	if (params->arch == IH_ARCH_ARM)
+		rcwheader = RCW_ARM_HEADER;
+	else
+		rcwheader = RCW_PPC_HEADER;
 
 	/* Only a few checks can be done: search for magic numbers */
 	if (ENDIANNESS == 'l') {
 		if (pbl_hdr->preamble != reverse_byte(RCW_PREAMBLE))
 			return -FDT_ERR_BADSTRUCTURE;
 
-		if (pbl_hdr->rcwheader != reverse_byte(RCW_HEADER))
+		if (pbl_hdr->rcwheader != reverse_byte(rcwheader))
 			return -FDT_ERR_BADSTRUCTURE;
 	} else {
 		if (pbl_hdr->preamble != RCW_PREAMBLE)
 			return -FDT_ERR_BADSTRUCTURE;
 
-		if (pbl_hdr->rcwheader != RCW_HEADER)
+		if (pbl_hdr->rcwheader != rcwheader)
 			return -FDT_ERR_BADSTRUCTURE;
 	}
 	return 0;

tools/pblimage.h

@@ -8,7 +8,8 @@
 
 #define RCW_BYTES	64
 #define RCW_PREAMBLE	0xaa55aa55
-#define RCW_HEADER	0x010e0100
+#define RCW_ARM_HEADER	0x01ee0100
+#define RCW_PPC_HEADER	0x010e0100
 
 struct pbl_header {
 	uint32_t preamble;