gpio: gpio-stmpe: make various char arrays static const, shrinks object size
Don't populate the read-only arrays edge_det_values, rise_values and
fall_values on the stack but instead make them static and constify them.
Makes the object code smaller by over 240 bytes:
Before:
text data bss dec hex filename
9525 2520 192 12237 2fcd drivers/gpio/gpio-stmpe.o
After:
text data bss dec hex filename
9025 2776 192 11993 2ed9 drivers/gpio/gpio-stmpe.o
(gcc version 7.2.0 x86_64)
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c
index e6e5cca..e3d048e 100644
--- a/drivers/gpio/gpio-stmpe.c
+++ b/drivers/gpio/gpio-stmpe.c
@@ -273,15 +273,21 @@ static void stmpe_dbg_show_one(struct seq_file *s,
u8 fall_reg;
u8 irqen_reg;
- char *edge_det_values[] = {"edge-inactive",
- "edge-asserted",
- "not-supported"};
- char *rise_values[] = {"no-rising-edge-detection",
- "rising-edge-detection",
- "not-supported"};
- char *fall_values[] = {"no-falling-edge-detection",
- "falling-edge-detection",
- "not-supported"};
+ static const char * const edge_det_values[] = {
+ "edge-inactive",
+ "edge-asserted",
+ "not-supported"
+ };
+ static const char * const rise_values[] = {
+ "no-rising-edge-detection",
+ "rising-edge-detection",
+ "not-supported"
+ };
+ static const char * const fall_values[] = {
+ "no-falling-edge-detection",
+ "falling-edge-detection",
+ "not-supported"
+ };
#define NOT_SUPPORTED_IDX 2
u8 edge_det = NOT_SUPPORTED_IDX;
u8 rise = NOT_SUPPORTED_IDX;