[PARISC] PDC_CHASSIS is implemented on all machines

This patch removes a limitation of the original code, so that CHASSIS
codes can be sent to all machines. On machines with a LCD panel, this
code displays "INI" during bootup, "RUN" when the system is booted and
running, "FLT" when a panic occurs, etc.

This part of the code can be enabled/disabled through CONFIG_PDC_CHASSIS

This patch also adds minimalistic support for Chassis warnings, through
a proc entry '/proc/chassis', which will reflect the warnings status (PSU
or fans failure when they happen, NVRAM battery level and temperature
thresholds overflows).

This part of the code can be enabled/disabled through CONFIG_PDC_CHASSIS_WARN

Signed-off-by: Thibaut VARENE <varenet@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>

1 files changed, 26 insertions, 7 deletions

diff --git a/drivers/parisc/Kconfig b/drivers/parisc/Kconfig
index 3f5de867acd7..1d3b84b4af3f 100644
--- a/drivers/parisc/Kconfig
+++ b/drivers/parisc/Kconfig
@@ -140,18 +140,37 @@ config CHASSIS_LCD_LED
 	  If unsure, say Y.
 
 config PDC_CHASSIS
-	bool "PDC chassis State Panel support"
+	bool "PDC chassis state codes support"
 	default y
 	help
-	  Say Y here if you want to enable support for the LED State front
-	  panel as found on E class, and support for the GSP Virtual Front
-	  Panel (LED State and message logging)  as found on high end
-	  servers such as A, L and N-class.
-	  
-	  This has nothing to do with Chassis LCD and LED support.
+	  Say Y here if you want to enable support for Chassis codes.
+	  That includes support for LED State front panel as found on E
+	  class, and support for the GSP Virtual Front Panel (LED State and
+	  message logging)  as found on high end servers such as A, L and
+	  N-class.
+	  This driver will also display progress messages on LCD display,
+	  such as "INI", "RUN" and "FLT", and might thus clobber messages
+	  shown by the LED/LCD driver.
+	  This driver updates the state panel (LED and/or LCD) upon system
+	  state change (eg: boot, shutdown or panic).
 	  
 	  If unsure, say Y.
 
+
+config PDC_CHASSIS_WARN
+	bool "PDC chassis warnings support"
+	depends on PROC_FS
+	default y
+	help
+	  Say Y here if you want to enable support for Chassis warnings.
+	  This will add a proc entry '/proc/chassis' giving some information
+	  about the overall health state of the system.
+	  This includes NVRAM battery level, overtemp or failures such as
+	  fans or power units.
+
+	  If unsure, say Y.
+
+
 config PDC_STABLE
 	tristate "PDC Stable Storage support"
 	depends on SYSFS