[PATCH] liebherr: btt: shrink spl_board_init

[Rasmus Villemoes]

This board is very tight on space in SPL; in fact with my compiler it
ends up just exactly on the wrong side:

spl/u-boot-spl.bin exceeds file size limit:
  limit:  0xa000 bytes
  actual: 0xa014 bytes
  excess: 0x14 bytes

The repeated "lookup and request" pattern in spl_board_init() suggests
a low-hanging fruit for reducing the code size. This reduces the
object size of spl/board/liebherr/btt/btt.o by 300 bytes.

I've left the lack of error handling as-is; there isn't really
anything to do if it fails, so I suppose the printfs are the best that
can be done.

Signed-off-by: Rasmus Villemoes <ravi at prevas.dk>
---
Compile-tested only. Stumbled on this while investigating why another patch failed CI.

 board/liebherr/btt/btt.c | 60 +++++++++++++---------------------------
 1 file changed, 19 insertions(+), 41 deletions(-)

diff --git a/board/liebherr/btt/btt.c b/board/liebherr/btt/btt.c
index e05e333ac7e..c4b6c37e495 100644
--- a/board/liebherr/btt/btt.c
+++ b/board/liebherr/btt/btt.c
@@ -110,10 +110,23 @@ static int spi_load_boot_info(void)
 #define BTT_MONITORING_DEVICE_TIMEOUT 100
 static int rescue_val;
 
+static void lookup_and_request(struct gpio_desc *desc, const char *name, const char *label)
+{
+	int ret;
+
+	ret = dm_gpio_lookup_name(name, desc);
+	if (ret)
+		printf("Cannot get %s\n", name);
+
+	ret = dm_gpio_request(desc, label);
+	if (ret)
+		printf("Cannot request %s\n", name);
+}
+
 void spl_board_init(void)
 {
 	struct gpio_desc phy_rst, boot, rescue, wifi_en, bt_en;
-	int ret, i;
+	int i;
 
 	/*
 	 * On the new HW version of BTTC/3 (with LAN8720ai PHY) the !RST pin
@@ -125,14 +138,7 @@ void spl_board_init(void)
 	 * to set the RESET pin to HIGH after 100us, so there was no need to
 	 * set it explicitly.
 	 */
-	ret = dm_gpio_lookup_name("GPIO4_12", &phy_rst);
-	if (ret)
-		printf("Cannot get GPIO4_12\n");
-
-	ret = dm_gpio_request(&phy_rst, "phy-rst");
-	if (ret)
-		printf("Cannot request GPIO4_12\n");
-
+	lookup_and_request(&phy_rst, "GPIO4_12", "phy-rst");
 	dm_gpio_set_dir_flags(&phy_rst, GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
 
 	/*
@@ -140,14 +146,7 @@ void spl_board_init(void)
 	 * it is directly connected to Jody module without any externa pull up
 	 * down register.
 	 */
-	ret = dm_gpio_lookup_name("GPIO0_27", &wifi_en);
-	if (ret)
-		printf("Cannot get GPIO0_27\n");
-
-	ret = dm_gpio_request(&wifi_en, "wifi-en");
-	if (ret)
-		printf("Cannot request GPIO0_27\n");
-
+	lookup_and_request(&wifi_en, "GPIO0_27", "wifi-en");
 	dm_gpio_set_dir_flags(&wifi_en, GPIOD_IS_OUT | GPIOD_ACTIVE_LOW |
 			      GPIOD_IS_OUT_ACTIVE);
 
@@ -157,36 +156,15 @@ void spl_board_init(void)
 	 * time this pin is set to HIGH). However, the manual recommends setting
 	 * it high from LOW state.
 	 */
-	ret = dm_gpio_lookup_name("GPIO3_27", &bt_en);
-	if (ret)
-		printf("Cannot get GPIO3_27\n");
-
-	ret = dm_gpio_request(&bt_en, "bt-en");
-	if (ret)
-		printf("Cannot request GPIO3_27\n");
-
+	lookup_and_request(&bt_en, "GPIO3_27", "bt-en");
 	dm_gpio_set_dir_flags(&bt_en, GPIOD_IS_OUT | GPIOD_ACTIVE_LOW |
 			      GPIOD_IS_OUT_ACTIVE);
 
 	/* 'boot' and 'rescue' pins */
-	ret = dm_gpio_lookup_name("GPIO4_9", &boot);
-	if (ret)
-		printf("Cannot get GPIO4_9\n");
-
-	ret = dm_gpio_request(&boot, "boot");
-	if (ret)
-		printf("Cannot request GPIO4_9\n");
-
+	lookup_and_request(&boot, "GPIO4_9", "boot");
 	dm_gpio_set_dir_flags(&boot, GPIOD_IS_IN);
 
-	ret = dm_gpio_lookup_name("GPIO4_11", &rescue);
-	if (ret)
-		printf("Cannot get GPIO4_11\n");
-
-	ret = dm_gpio_request(&rescue, "rescue");
-	if (ret)
-		printf("Cannot request GPIO4_11\n");
-
+	lookup_and_request(&rescue, "GPIO4_11", "rescue");
 	dm_gpio_set_dir_flags(&rescue, GPIOD_IS_IN);
 
 	/* Wait for ready signal from system "monitoring" device */
-- 
2.51.0