arm64: zynqmp: add tool to minimize psu_init_gpl.c files

This script transforms a pair of psu_init_gpl.c and .h files produced by
the Xilinx Vivado tool for ZynqMP into a smaller psu_init_gpl.c file that
is almost checkpatch compliant.

Based on a script by Michal Simek.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/tools/zynqmp_psu_init_minimize.sh b/tools/zynqmp_psu_init_minimize.sh
new file mode 100755 (executable)
index 0000000..b0a07f9
--- /dev/null
+++ b/tools/zynqmp_psu_init_minimize.sh
@@ -0,0 +1,145 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright (C) 2018 Michal Simek <michal.simek@xilinx.com>
+# Copyright (C) 2019 Luca Ceresoli <luca@lucaceresoli.net>
+
+usage()
+{
+    cat <<EOF
+
+Transform a pair of psu_init_gpl.c and .h files produced by the Xilinx
+Vivado tool for ZynqMP into a smaller psu_init_gpl.c file that is almost
+checkpatch compliant. Minor coding style might still be needed. Must be
+run from the top-level U-Boot source directory.
+
+Usage:   zynqmp_psu_init_minimize.sh INPUT_DIR OUTPUT_DIR
+Example: zynqmp_psu_init_minimize.sh \\
+                 /path/to/original/psu_init_gpl_c_and_h/ \\
+                 board/xilinx/zynqmp/<my_board>/
+
+Notes:   INPUT_DIR must contain both .c and .h files.
+         If INPUT_DIR and OUTPUT_DIR are the same directory,
+         psu_init_gpl.c will be overwritten.
+
+EOF
+}
+
+set -o errexit -o errtrace
+set -o nounset
+
+if [ $# -ne 2 ]
+then
+    usage >&2
+    exit 1
+fi
+
+IN="${1}/psu_init_gpl.c"
+OUT="${2}/psu_init_gpl.c"
+TMP=$(mktemp /tmp/psu_init_gpl.XXXXXX)
+trap "rm ${TMP}" ERR
+
+# Step through a temp file to allow both $IN!=$OUT and $IN==$OUT
+sed -e '/sleep.h/d' \
+    -e '/xil_io.h/d' \
+    ${IN} >${TMP}
+cp ${TMP} ${OUT}
+
+# preprocess to expand defines, then remove cpp lines starting with '#'
+gcc -I${1} -E ${OUT} -o ${TMP}
+sed '/^#/d' ${TMP} >${OUT}
+
+# Remove trivial code before psu_pll_init_data()
+sed -ni '/psu_pll_init_data/,$p' ${OUT}
+
+# Functions are lowercase in U-Boot, rename them
+sed -i 's/PSU_Mask_Write/psu_mask_write/g' ${OUT}
+sed -i 's/mask_pollOnValue/mask_pollonvalue/g' ${OUT}
+sed -i 's/RegValue/regvalue/g' ${OUT}
+sed -i 's/MaskStatus/maskstatus/g' ${OUT}
+
+sed -i '/&= psu_peripherals_powerdwn_data()/d' ${OUT}
+
+FUNCS_TO_REMOVE="psu_protection
+psu_..._protection
+psu_init_xppu_aper_ram
+mask_delay(u32
+mask_read(u32
+dpll_prog
+mask_poll(u32
+mask_pollonvalue(u32
+psu_ps_pl_reset_config_data
+psu_ps_pl_isolation_removal_data
+psu_apply_master_tz
+psu_post_config_data
+psu_post_config_data
+psu_peripherals_powerdwn_data
+psu_init_ddr_self_refresh
+xmpu
+xppu
+"
+for i in $FUNCS_TO_REMOVE; do
+sed -i "/$i/,/^}$/d" ${OUT}
+done
+
+scripts/Lindent ${OUT}
+
+# Prepend 'static' to internal functions
+sed -i 's/^.*data(void)$/static &/g' ${OUT}
+sed -i 's/^.*psu_afi_config(void)$/static &/g' ${OUT}
+sed -i 's/^void init_peripheral/static &/g' ${OUT}
+sed -i 's/^int serdes/static &/g' ${OUT}
+sed -i 's/^int init_serdes/static &/g' ${OUT}
+sed -i 's/^unsigned long /static &/g' ${OUT}
+
+sed -i 's/()$/(void)/g' ${OUT}
+sed -i 's/0X/0x/g' ${OUT}
+
+# Add header
+cat << EOF >${TMP}
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (c) Copyright 2015 Xilinx, Inc. All rights reserved.
+ */
+
+#include <asm/arch/psu_init_gpl.h>
+#include <xil_io.h>
+
+EOF
+
+cat ${OUT} >>${TMP}
+cp ${TMP} ${OUT}
+
+# Temporarily convert newlines to do some mangling across lines
+tr "\n" "\r" <${OUT} >${TMP}
+
+# Cleanup empty loops. E.g.:
+# |while (e) {|
+# |           | ==> |while (e)|
+# |    }      |     |    ;    |
+# |           |
+sed -i -r 's| \{\r+(\t*)\}\r\r|\n\1\t;\n|g' ${TMP}
+
+# Remove empty line between variable declaration
+sed -i -r 's|\r(\r\t(unsigned )?int )|\1|g' ${TMP}
+
+# Remove empty lines at function beginning/end
+sed -i -e 's|\r{\r\r|\r{\r|g' ${TMP}
+sed -i -e 's|\r\r}\r|\r}\r|g' ${TMP}
+
+# Remove empty lines after '{' line
+sed -i -e 's| {\r\r| {\r|g' ${TMP}
+
+# Remove braces {} around single statement blocks. E.g.:
+# | while (e) { |    | while (e) |
+# |     stg();  | => |     stg();|
+# | }           |
+sed -i -r 's| \{(\r[^\r]*;)\r\t*\}|\1|g' ${TMP}
+
+# Remove Unnecessary parentheses around 'n_code <= 0x3C' and similar. E.g.:
+# if ((p_code >= 0x26) && ...) -> if (p_code >= 0x26 && ...)
+sed -i -r 's|\((._code .= [x[:xdigit:]]+)\)|\1|g' ${TMP}
+
+# Convert back newlines
+tr "\r" "\n" <${TMP} >${OUT}
+
+rm ${TMP}