[U-Boot] [PATCH] arm: exynos: Squash bogus warnings in pinmux

[Marek Vasut]

Squash these warnings in pinmux.c found with GCC 4.8:

/arch/arm/cpu/armv7/exynos/pinmux.c: In function 'exynos_pinmux_config':
/arch/arm/cpu/armv7/exynos/pinmux.c:687:28: warning: 'count' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for (i = start; i < start + count; i++) {
                            ^
/arch/arm/cpu/armv7/exynos/pinmux.c:663:16: note: 'count' was declared here
  int i, start, count;
                ^
/arch/arm/cpu/armv7/exynos/pinmux.c:687:28: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for (i = start; i < start + count; i++) {
                            ^
/arch/arm/cpu/armv7/exynos/pinmux.c:663:9: note: 'start' was declared here
  int i, start, count;
         ^
/arch/arm/cpu/armv7/exynos/pinmux.c:689:19: warning: 'bank' may be used uninitialized in this function [-Wmaybe-uninitialized]
   s5p_gpio_cfg_pin(bank, i, GPIO_FUNC(0x2));
                   ^
/arch/arm/cpu/armv7/exynos/pinmux.c:662:24: note: 'bank' was declared here
  struct s5p_gpio_bank *bank;
                        ^
/arch/arm/cpu/armv7/exynos/pinmux.c: In function 'exynos_pinmux_config':
/arch/arm/cpu/armv7/exynos/pinmux.c:687:28: warning: 'count' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for (i = start; i < start + count; i++) {
                            ^
/arch/arm/cpu/armv7/exynos/pinmux.c:663:16: note: 'count' was declared here
  int i, start, count;
                ^
/arch/arm/cpu/armv7/exynos/pinmux.c:687:28: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for (i = start; i < start + count; i++) {
                            ^
/arch/arm/cpu/armv7/exynos/pinmux.c:663:9: note: 'start' was declared here
  int i, start, count;
         ^
/arch/arm/cpu/armv7/exynos/pinmux.c:689:19: warning: 'bank' may be used uninitialized in this function [-Wmaybe-uninitialized]
   s5p_gpio_cfg_pin(bank, i, GPIO_FUNC(0x2));
                   ^
/arch/arm/cpu/armv7/exynos/pinmux.c:662:24: note: 'bank' was declared here
  struct s5p_gpio_bank *bank;
                        ^

Note that the warning is bogus, the function can never be called with invalid
'peripheral' argument. GCC just cannot analyze this.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Naveen Krishna Chatradhi <ch.naveen at samsung.com>
Cc: Akshay Saraswat <akshay.s at samsung.com>
Cc: Rajeshwari S Shinde <rajeshwari.s at samsung.com>
Cc: Simon Glass <sjg at chromium.org>
Cc: Minkyu Kang <mk7.kang at samsung.com>
Cc: Tom Rini <trini at ti.com>
---
 arch/arm/cpu/armv7/exynos/pinmux.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c b/arch/arm/cpu/armv7/exynos/pinmux.c
index 645c497..61759a4 100644
--- a/arch/arm/cpu/armv7/exynos/pinmux.c
+++ b/arch/arm/cpu/armv7/exynos/pinmux.c
@@ -39,6 +39,9 @@ static void exynos5_uart_config(int peripheral)
 		start = 4;
 		count = 2;
 		break;
+	default:
+		debug("%s: invalid peripheral %d", __func__, peripheral);
+		return;
 	}
 	for (i = start; i < start + count; i++) {
 		s5p_gpio_set_pull(bank, i, GPIO_PULL_NONE);
@@ -74,6 +77,9 @@ static void exynos5420_uart_config(int peripheral)
 		start = 4;
 		count = 2;
 		break;
+	default:
+		debug("%s: invalid peripheral %d", __func__, peripheral);
+		return;
 	}
 
 	for (i = start; i < start + count; i++) {
@@ -110,6 +116,9 @@ static int exynos5_mmc_config(int peripheral, int flags)
 		bank = &gpio1->c4;
 		bank_ext = NULL;
 		break;
+	default:
+		debug("%s: invalid peripheral %d", __func__, peripheral);
+		return -1;
 	}
 	if ((flags & PINMUX_FLAG_8BIT_MODE) && !bank_ext) {
 		debug("SDMMC device %d does not support 8bit mode",
@@ -683,6 +692,9 @@ static void exynos4_uart_config(int peripheral)
 		start = 4;
 		count = 2;
 		break;
+	default:
+		debug("%s: invalid peripheral %d", __func__, peripheral);
+		return;
 	}
 	for (i = start; i < start + count; i++) {
 		s5p_gpio_set_pull(bank, i, GPIO_PULL_NONE);
-- 
1.8.5.2