mmp2/clk: add /clocks node

Provides a marvell,mmp2-clock compatible clock implementation as
described in the clock/marvell,mmp2.txt binding doc.

This should eventually replace the /apbc and /pmua nodes, which follow a
different binding than Linux expects. Following commits switch the
peripherals to this new nod.

2 files changed, 102 insertions, 0 deletions

diff --git a/cpu/arm/mmp2/clk.fth b/cpu/arm/mmp2/clk.fth
new file mode 100644
index 00000000..563c5b65
--- /dev/null
+++ b/cpu/arm/mmp2/clk.fth
@@ -0,0 +1,101 @@
+\ See license at end of file
+purpose: MMP2 clock management
+
+\ From include/dt-bindings/clock/marvell,mmp2.h
+d#  60 constant mmp2-twsi0-clk#
+d#  61 constant mmp2-twsi1-clk#
+d#  63 constant mmp2-twsi3-clk#
+d#  65 constant mmp2-twsi5-clk#
+d#  66 constant mmp2-gpio-clk#
+d#  68 constant mmp2-rtc-clk#
+d#  73 constant mmp2-uart0-clk#
+d#  74 constant mmp2-uart1-clk#
+d#  75 constant mmp2-uart2-clk#
+d#  76 constant mmp2-uart3-clk#
+d#  77 constant mmp2-ssp0-clk#
+d#  78 constant mmp2-ssp1-clk#
+d#  79 constant mmp2-ssp2-clk#
+d#  81 constant mmp2-timer-clk#
+d# 106 constant mmp2-disp0-clk#
+d# 101 constant mmp2-sdh0-clk#
+d# 102 constant mmp2-sdh1-clk#
+d# 103 constant mmp2-sdh2-clk#
+d# 104 constant mmp2-sdh3-clk#
+d# 105 constant mmp2-usb-clk#
+d# 112 constant mmp2-ccic0-clk#
+d# 120 constant mmp2-disp0-lcdc-clk#
+
+0 0  " "  " /" begin-package
+" clocks" name
+" marvell,mmp2-clock" +compatible
+
+h# d405.0000 encode-int          h# 1000 encode-int encode+
+h# d428.2800 encode-int encode+  h#  400 encode-int encode+
+h# d401.5000 encode-int encode+  h# 1000 encode-int encode+
+" reg" property
+
+" mpmu" encode-string
+" apmu" encode-string encode+
+" apbc" encode-string encode+
+" reg-names" property
+
+1 " #clock-cells" integer-property
+1 " #reset-cells" integer-property
+
+\            value   clr-mask  reg
+: twsi0-clk  h#   3  h#  77    h#  04 +apbc ;
+: twsi1-clk  h#   3  h#  77    h#  08 +apbc ;
+: twsi3-clk  h#   3  h#  77    h#  10 +apbc ;
+: twsi5-clk  h#   3  h#  77    h#  80 +apbc ;
+: sdh0-clk   h# 41b  h#  1b    h# 054 +pmua ;
+: sdh1-clk   h#  1b  h#  1b    h# 058 +pmua ;
+: sdh2-clk   h#  1b  h#  1b    h# 0e8 +pmua ;
+: sdh3-clk   h#  1b  h#  1b    h# 0ec +pmua ;
+
+: generic-on/off         ( on? value clr-mask reg )
+   dup io@               ( on? value clr-mask reg reg-val )
+   rot not and           ( on? value reg masked-val )
+   2swap swap            ( reg masked-val value on? )
+   if or else drop then  ( reg final-val )
+   swap io!
+;
+
+: on/off  ( on? clock# -- )
+   dup mmp2-twsi0-clk#  =  if drop  twsi0-clk generic-on/off  exit then
+   dup mmp2-twsi1-clk#  =  if drop  twsi1-clk generic-on/off  exit then
+   dup mmp2-twsi3-clk#  =  if drop  twsi3-clk generic-on/off  exit then
+   dup mmp2-twsi5-clk#  =  if drop  twsi5-clk generic-on/off  exit then
+   dup mmp2-sdh0-clk#   =  if drop  sdh0-clk  generic-on/off  exit then
+   dup mmp2-sdh1-clk#   =  if drop  sdh1-clk  generic-on/off  exit then
+   dup mmp2-sdh2-clk#   =  if drop  sdh2-clk  generic-on/off  exit then
+   dup mmp2-sdh3-clk#   =  if drop  sdh3-clk  generic-on/off  exit then
+
+   " clock=" type .d " on=" type .d cr
+   abort " Unimplemented clock"
+;
+
+end-package
+
+\ LICENSE_BEGIN
+\ Copyright (c) 2019 Lubomir Rintel <lkundrak@v3.sk>
+\
+\ Permission is hereby granted, free of charge, to any person obtaining
+\ a copy of this software and associated documentation files (the
+\ "Software"), to deal in the Software without restriction, including
+\ without limitation the rights to use, copy, modify, merge, publish,
+\ distribute, sublicense, and/or sell copies of the Software, and to
+\ permit persons to whom the Software is furnished to do so, subject to
+\ the following conditions:
+\
+\ The above copyright notice and this permission notice shall be
+\ included in all copies or substantial portions of the Software.
+\
+\ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+\ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+\ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+\ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+\ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+\ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+\ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+\
+\ LICENSE_END
diff --git a/cpu/arm/olpc/prefw.fth b/cpu/arm/olpc/prefw.fth
index d12519e9..9edd3082 100644
--- a/cpu/arm/olpc/prefw.fth
+++ b/cpu/arm/olpc/prefw.fth
@@ -225,6 +225,7 @@ fload ${BP}/ofw/gui/loadmenu.fth
 \ Marvell MMP low-level stuff
 fload ${BP}/cpu/arm/mmp2/pmua.fth
 fload ${BP}/cpu/arm/mmp2/apbc.fth
+fload ${BP}/cpu/arm/mmp2/clk.fth
 fload ${BP}/cpu/arm/mmp2/irq.fth
 fload ${BP}/cpu/arm/mmp2/timer.fth
 fload ${BP}/cpu/arm/mmp2/gpio.fth