hwstub: port hwstub_shell to the new library

Also use this opportunity to cleanup support for multiple devices: the shell
now supports dynamic changes in the device and will call init() everytime
a new device is selected, to prepare a new environment. The shell now
honors register width on register read/write. The shell also provides access
to variants as follows by creating a subtable under the register using the
variant type in UPPER case and having the same layout as a register.
For example if register HW.GPIO.DIR has variants "set" and "clr", those can
be used like this:
HW.GPIO.DIR.SET.write(0xff)
HW.GPIO.DIR.CLR.write(0xff00)

Change-Id: I943947fa98bce875de0cba4338e8b7196a4c1165

1 files changed, 21 insertions, 21 deletions

diff --git a/utils/hwstub/tools/lua/stmp.lua b/utils/hwstub/tools/lua/stmp.lua
index 807c18df8d..ea1cde9c6d 100644
--- a/utils/hwstub/tools/lua/stmp.lua
+++ b/utils/hwstub/tools/lua/stmp.lua
@@ -1,7 +1,6 @@
 ---
 --- Chip Identification
 ---
-
 STMP = { info = {} }
 
 local h = HELP:create_topic("STMP")
@@ -49,18 +48,6 @@ function STMP.is_stmp3600()
     return hwstub.dev.stmp.chipid >= 0x3600 and hwstub.dev.stmp.chipid < 0x3700
 end
 
-if STMP.is_imx233() then
-    identify("STMP3780 (aka i.MX233)", "imx233", "imx233")
-elseif STMP.is_stmp3700() then
-    identify("STMP3700", "stmp3700", "stmp3700")
-elseif STMP.is_stmp3770() then
-    identify("STMP3770", "stmp3770", "stmp3700")
-elseif STMP.is_stmp3600() then
-    identify("STMP3600", "stmp3600", "stmp3600")
-else
-    print(string.format("Unable to identify this chip as a STMP: chipid=0x%x", hwstub.dev.stmp.chipid));
-end
-
 hh = h:create_topic("debug")
 hh:add("STMP.debug(...) prints some debug output if STMP.debug_on is true and does nothing otherwise.")
 
@@ -70,11 +57,24 @@ function STMP.debug(...)
     if STMP.debug_on then print(...) end
 end
 
-if STMP.info.chip ~= nil then
-    require "stmp/digctl"
-    require "stmp/pinctrl"
-    require "stmp/lcdif"
-    require "stmp/pwm"
-    require "stmp/clkctrl"
-    require "stmp/i2c"
-end
\ No newline at end of file
+-- init
+function STMP.init()
+    if STMP.is_imx233() then
+        identify("STMP3780 (aka i.MX233)", "imx233", "imx233")
+    elseif STMP.is_stmp3700() then
+        identify("STMP3700", "stmp3700", "stmp3700")
+    elseif STMP.is_stmp3770() then
+        identify("STMP3770", "stmp3770", "stmp3700")
+    elseif STMP.is_stmp3600() then
+        identify("STMP3600", "stmp3600", "stmp3600")
+    else
+        print(string.format("Unable to identify this chip as a STMP: chipid=0x%x", hwstub.dev.stmp.chipid));
+    end
+end
+
+require "stmp/digctl"
+require "stmp/pinctrl"
+require "stmp/lcdif"
+require "stmp/pwm"
+require "stmp/clkctrl"
+require "stmp/i2c"
\ No newline at end of file