[PATCH v3 1/6] reset: Allow per-board reset type

[dmukhin at ford.com]

From: Denis Mukhin <dmukhin at ford.com> 

Some prototype boards may not have (temporarily) all required reset
types supported (e.g. only warm reset supported).

Add a Kconfig choice to select the board-specific default reset type
used by the `reset` command, allowing it to work on such boards.

Keep cold reset as the default.

Signed-off-by: Denis Mukhin <dmukhin at ford.com>
---
Changes since v2:
- n/a
---
 drivers/sysreset/Kconfig           | 31 ++++++++++++++++++++++++++++++
 drivers/sysreset/sysreset-uclass.c | 19 +++++++++++++++++-
 2 files changed, 49 insertions(+), 1 deletion(-)

diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig
index 90f740f51d42..2584c2b203e5 100644
--- a/drivers/sysreset/Kconfig
+++ b/drivers/sysreset/Kconfig
@@ -57,6 +57,37 @@ config SYSRESET_CMD_RESET_ARGS
 	  additional arguments for implementing arch/board specific
 	  functionality.
 
+if SYSRESET_CMD_RESET
+choice
+	prompt "Default reset type for reset command"
+	default SYSRESET_CMD_RESET_DEFAULT_COLD
+	help
+	  Select the default reset type used by the reset command when no
+	  explicit reset type is requested.
+
+config SYSRESET_CMD_RESET_DEFAULT_WARM
+	bool "Warm reset"
+	help
+	  Reset CPU while keeping GPIOs active.
+
+config SYSRESET_CMD_RESET_DEFAULT_COLD
+	bool "Cold reset"
+	help
+	  Reset CPU and GPIOs.
+
+config SYSRESET_CMD_RESET_DEFAULT_POWER
+	bool "Power reset"
+	help
+	  Reset PMIC by removing and restoring power.
+
+config SYSRESET_CMD_RESET_DEFAULT_POWER_OFF
+	bool "Power off"
+	help
+	  Turn off power.
+
+endchoice
+endif
+
 if CMD_POWEROFF
 
 config SYSRESET_CMD_POWEROFF
diff --git a/drivers/sysreset/sysreset-uclass.c b/drivers/sysreset/sysreset-uclass.c
index f25e09e9cd06..d2fddb470bf1 100644
--- a/drivers/sysreset/sysreset-uclass.c
+++ b/drivers/sysreset/sysreset-uclass.c
@@ -150,9 +150,26 @@ void reset_cpu(void)
 }
 
 #if IS_ENABLED(CONFIG_SYSRESET_CMD_RESET)
+static enum sysreset_t sysreset_get_default_type(void)
+{
+	if (IS_ENABLED(CONFIG_SYSRESET_CMD_RESET_DEFAULT_WARM))
+		return SYSRESET_WARM;
+
+	if (IS_ENABLED(CONFIG_SYSRESET_CMD_RESET_DEFAULT_COLD))
+		return SYSRESET_COLD;
+
+	if (IS_ENABLED(CONFIG_SYSRESET_CMD_RESET_DEFAULT_POWER))
+		return SYSRESET_POWER;
+
+	if (IS_ENABLED(CONFIG_SYSRESET_CMD_RESET_DEFAULT_POWER_OFF))
+		return SYSRESET_POWER_OFF;
+
+	return SYSRESET_COLD;
+}
+
 int do_reset(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
-	enum sysreset_t reset_type = SYSRESET_COLD;
+	enum sysreset_t reset_type = sysreset_get_default_type();
 
 	if (argc > 2)
 		return CMD_RET_USAGE;
-- 
2.54.0