Merge branch '2024-02-13-assorted-updates'

- Add the button command patch, update MAINTAINERS entry for a platform,
  fix a problem with the hash command, fix a problem on K3 platforms and
  revert a change on verdin-am62.

board/hisilicon/poplar/MAINTAINERS

@@ -1,6 +1,7 @@
 Poplar BOARD
 M:     Jorge Ramirez-Ortiz <jorge.ramirez.ortiz@gmail.com>
 M:     Shawn Guo <shawn.guo@linaro.org>
+M:     Igor Opaniuk <igor.opaniuk@gmail.com>
 S:     Maintained
 F:     board/hisilicon/poplar
 F:     doc/board/hisilicon/poplar.rst

board/toradex/verdin-am62/verdin-am62.c

@@ -14,13 +14,10 @@
 #include <fdt_support.h>
 #include <init.h>
 #include <k3-ddrss.h>
-#include <power/regulator.h>
 #include <spl.h>
 
 #include "../common/tdx-cfg-block.h"
 
-#define VDD_CORE_REG "buck1"
-
 DECLARE_GLOBAL_DATA_PTR;
 
 int board_init(void)
@@ -53,37 +50,9 @@ int board_fit_config_name_match(const char *name)
 }
 #endif
 
-static u32 get_vdd_core_nominal(void)
-{
-	int core_uvolt;
-
-	switch (k3_get_speed_grade()) {
-	case 'G':
-	case 'K':
-	case 'S':
-		core_uvolt = 750000;
-		break;
-	case 'T':
-	default:
-		core_uvolt = 850000;
-		break;
-	}
-	return core_uvolt;
-}
-
 #if IS_ENABLED(CONFIG_OF_LIBFDT) && IS_ENABLED(CONFIG_OF_BOARD_SETUP)
 int ft_board_setup(void *blob, struct bd_info *bd)
 {
-	int core_uvolt;
-
-	core_uvolt = get_vdd_core_nominal();
-	if (core_uvolt != 850000) {
-		do_fixup_by_path_u32(blob, "/bus@f0000/i2c@20000000/pmic@30/regulators/buck1",
-				     "regulator-max-microvolt", core_uvolt, 0);
-		do_fixup_by_path_u32(blob, "/bus@f0000/i2c@20000000/pmic@30/regulators/buck1",
-				     "regulator-min-microvolt", core_uvolt, 0);
-	}
-
 	return ft_common_board_setup(blob, bd);
 }
 #endif
@@ -118,22 +87,6 @@ static void select_dt_from_module_version(void)
 
 int board_late_init(void)
 {
-	int ret;
-	int core_uvolt;
-	struct udevice *dev = NULL;
-
-	core_uvolt = get_vdd_core_nominal();
-	if (core_uvolt != 850000) {
-		/* Set CPU core voltage to 0.75V for slower speed grades */
-		ret = regulator_get_by_devname(VDD_CORE_REG, &dev);
-		if (ret)
-			pr_err("VDD CORE Regulator get error: %d\n", ret);
-
-		ret = regulator_set_value_force(dev, core_uvolt);
-		if (ret)
-			pr_err("VDD CORE Regulator value setting error: %d\n", ret);
-	}
-
 	select_dt_from_module_version();
 
 	return 0;

boot/Kconfig

@@ -20,6 +20,21 @@ config TIMESTAMP
 	  loaded that does not, the message 'Wrong FIT format: no timestamp'
 	  is shown.
 
+config BUTTON_CMD
+	bool "Support for running a command if a button is held during boot"
+	depends on CMDLINE
+	depends on BUTTON
+	help
+	  For many embedded devices it's useful to enter a special flashing mode
+	  such as fastboot mode when a button is held during boot. This option
+	  allows arbitrary commands to be assigned to specific buttons. These will
+	  be run after "preboot" if the button is held. Configuration is done via
+	  the environment variables "button_cmd_N_name" and "button_cmd_N" where n is
+	  the button number (starting from 0). e.g:
+
+	    "button_cmd_0_name=vol_down"
+	    "button_cmd_0=fastboot usb 0"
+
 menuconfig FIT
 	bool "Flattened Image Tree (FIT)"
 	select HASH

cmd/hash.c

@@ -14,15 +14,22 @@
 #include <hash.h>
 #include <linux/ctype.h>
 
+#if IS_ENABLED(CONFIG_HASH_VERIFY)
+#define HARGS 6
+#else
+#define HARGS 5
+#endif
+
 static int do_hash(struct cmd_tbl *cmdtp, int flag, int argc,
 		   char *const argv[])
 {
 	char *s;
 	int flags = HASH_FLAG_ENV;
 
-#ifdef CONFIG_HASH_VERIFY
-	if (argc < 4)
+	if (argc < (HARGS - 1))
 		return CMD_RET_USAGE;
+
+#if IS_ENABLED(CONFIG_HASH_VERIFY)
 	if (!strcmp(argv[1], "-v")) {
 		flags |= HASH_FLAG_VERIFY;
 		argc--;
@@ -37,18 +44,12 @@ static int do_hash(struct cmd_tbl *cmdtp, int flag, int argc,
 	return hash_command(*argv, flags, cmdtp, flag, argc - 1, argv + 1);
 }
 
-#ifdef CONFIG_HASH_VERIFY
-#define HARGS 6
-#else
-#define HARGS 5
-#endif
-
 U_BOOT_CMD(
 	hash,	HARGS,	1,	do_hash,
 	"compute hash message digest",
 	"algorithm address count [[*]hash_dest]\n"
 		"    - compute message digest [save to env var / *address]"
-#ifdef CONFIG_HASH_VERIFY
+#if IS_ENABLED(CONFIG_HASH_VERIFY)
 	"\nhash -v algorithm address count [*]hash\n"
 		"    - verify message digest of memory area to immediate value, \n"
 		"      env var or *address"

common/Makefile

@@ -12,6 +12,7 @@ obj-y += cli_getch.o cli_simple.o cli_readline.o
 obj-$(CONFIG_HUSH_OLD_PARSER) += cli_hush.o
 obj-$(CONFIG_HUSH_MODERN_PARSER) += cli_hush_modern.o
 obj-$(CONFIG_AUTOBOOT) += autoboot.o
+obj-$(CONFIG_BUTTON_CMD) += button_cmd.o
 obj-y += version.o
 
 # # boards

common/button_cmd.c

@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2023 Linaro Ltd.
+ *   Author: Caleb Connolly <caleb.connolly@linaro.org>
+ */
+
+#include <button.h>
+#include <command.h>
+#include <env.h>
+#include <log.h>
+#include <vsprintf.h>
+
+/* Some sane limit "just in case" */
+#define MAX_BTN_CMDS 32
+
+struct button_cmd {
+	bool pressed;
+	const char *btn_name;
+	const char *cmd;
+};
+
+/*
+ * Button commands are set via environment variables, e.g.:
+ * button_cmd_N_name=Volume Up
+ * button_cmd_N=fastboot usb 0
+ *
+ * This function will retrieve the command for the given button N
+ * and populate the cmd struct with the command string and pressed
+ * state of the button.
+ *
+ * Returns 1 if a command was found, 0 otherwise.
+ */
+static int get_button_cmd(int n, struct button_cmd *cmd)
+{
+	const char *cmd_str;
+	struct udevice *btn;
+	char buf[24];
+
+	snprintf(buf, sizeof(buf), "button_cmd_%d_name", n);
+	cmd->btn_name = env_get(buf);
+	if (!cmd->btn_name)
+		return 0;
+
+	button_get_by_label(cmd->btn_name, &btn);
+	if (!btn) {
+		log_err("No button labelled '%s'\n", cmd->btn_name);
+		return 0;
+	}
+
+	cmd->pressed = button_get_state(btn) == BUTTON_ON;
+	/* If the button isn't pressed then cmd->cmd will be unused so don't waste
+	 * cycles reading it
+	 */
+	if (!cmd->pressed)
+		return 1;
+
+	snprintf(buf, sizeof(buf), "button_cmd_%d", n);
+	cmd_str = env_get(buf);
+	if (!cmd_str) {
+		log_err("No command set for button '%s'\n", cmd->btn_name);
+		return 0;
+	}
+
+	cmd->cmd = cmd_str;
+
+	return 1;
+}
+
+void process_button_cmds(void)
+{
+	struct button_cmd cmd = {0};
+	int i = 0;
+
+	while (get_button_cmd(i++, &cmd) && i < MAX_BTN_CMDS) {
+		if (!cmd.pressed)
+			continue;
+
+		log_info("BTN '%s'> %s\n", cmd.btn_name, cmd.cmd);
+		run_command(cmd.cmd, CMD_FLAG_ENV);
+		/* Don't run commands for multiple buttons */
+		return;
+	}
+}

common/main.c

@@ -8,6 +8,7 @@
 
 #include <common.h>
 #include <autoboot.h>
+#include <button.h>
 #include <bootstage.h>
 #include <bootstd.h>
 #include <cli.h>
@@ -62,6 +63,8 @@ void main_loop(void)
 			efi_launch_capsules();
 	}
 
+	process_button_cmds();
+
 	s = bootdelay_process();
 	if (cli_process_fdt(&s))
 		cli_secure_boot_cmd(s);

doc/usage/environment.rst

@@ -190,6 +190,10 @@ bootm_size
 bootstopkeysha256, bootdelaykey, bootstopkey
     See README.autoboot
 
+button_cmd_0, button_cmd_0_name ... button_cmd_N, button_cmd_N_name
+    Used to map commands to run when a button is held during boot.
+    See CONFIG_BUTTON_CMD.
+
 updatefile
     Location of the software update file on a TFTP server, used
     by the automatic software update feature. Please refer to

drivers/memory/ti-gpmc.c

@@ -1196,6 +1196,12 @@ static int gpmc_probe(struct udevice *dev)
 	gpmc_cfg = (struct gpmc *)priv->base;
 	gpmc_base = priv->base;
 
+	/*
+	 * Disable all IRQs as some bootroms might leave them enabled
+	 * and that will cause a lock-up later
+	 */
+	gpmc_write_reg(GPMC_IRQENABLE, 0);
+
 	priv->l3_clk = devm_clk_get(dev, "fck");
 	if (IS_ERR(priv->l3_clk))
 		return PTR_ERR(priv->l3_clk);

include/button.h

@@ -74,4 +74,13 @@ enum button_state_t button_get_state(struct udevice *dev);
  */
 int button_get_code(struct udevice *dev);
 
+#if IS_ENABLED(CONFIG_BUTTON_CMD)
+/* Process button command mappings specified in the environment,
+ * running the commands for buttons which are pressed
+ */
+void process_button_cmds(void);
+#else
+static inline void process_button_cmds(void) {}
+#endif /* CONFIG_BUTTON_CMD */
+
 #endif