mb/system76/meer9: Add power_on_after_fail

Configure SuperIO for BIOS control of power loss behavior and add CMOS
option to allow user control.

Enum 1 is used instead of 7 as the `Keep` option does not seem to work
on meer9. The same setting via SIO control (CRE4) does work, though.

Change-Id: I9a215f5b0ab131a93afc1d8e41f608a263284ad0
Signed-off-by: Tim Crawford <tcrawford@system76.com>

Author: crawfxrd

src/mainboard/system76/meer9/bootblock.c

@@ -69,6 +69,12 @@ static void superio_init(void)
 	// GPIO 87 set high
 	pnp_write_config(dev, 0xF1, 0x80); // Default is 0xFF
 
+	printk(BIOS_DEBUG, "configure ACPI (logical device A)\n");
+	dev = PNP_DEV(0x2E, 0x0A);
+	pnp_set_logical_device(dev);
+	// User-defined resume state after power loss
+	pnp_write_config(dev, 0xE4, 0x60); // Default is 0x00
+
 	printk(BIOS_DEBUG, "configure hardware monitor (logical device B)\n");
 	dev = PNP_DEV(0x2E, 0x0B);
 	pnp_set_logical_device(dev);

src/mainboard/system76/meer9/cmos.default

@@ -3,3 +3,4 @@
 boot_option=Fallback
 debug_level=Debug
 me_state=Enable
+power_on_after_fail=Disable

src/mainboard/system76/meer9/cmos.layout

@@ -11,6 +11,8 @@ entries
 # RTC_CLK_ALTCENTURY
 400	8	r	0	century
 
+# TODO: Use enum 7 to allow `Keep`
+409	2	e	1	power_on_after_fail
 412	4	e	6	debug_level
 416	1	e	2	me_state
 417	3	h	0	me_state_counter
@@ -22,6 +24,9 @@ entries
 
 enumerations
 
+1	0	Disable
+1	1	Enable
+
 2	0	Enable
 2	1	Disable
 
@@ -38,6 +43,10 @@ enumerations
 6	7	Debug
 6	8	Spew
 
+7	0	Disable
+7	1	Enable
+7	2	Keep
+
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