gpio: Change gpio_baseX_value() function return types to unsigned

This patch changes the return type of gpio_base2_value() and related
functions from int to uint32_t. This makes more sense now that
board_id() and related functions (which are the primary use case) also
return that type. It's unlikely that we'll ever read a strapping of 32
GPIOs in a row, but if we did, we'd probably want to treat it as
unsigned.

Change-Id: I8fb7e3a7c76cb886aed40d0ada1f545180e43117
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/27809
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

1 files changed, 7 insertions, 7 deletions

diff --git a/src/include/gpio.h b/src/include/gpio.h
index 3160242562..0a37ee7087 100644
--- a/src/include/gpio.h
+++ b/src/include/gpio.h
@@ -29,7 +29,7 @@ void gpio_input_pulldown(gpio_t gpio);
 void gpio_input_pullup(gpio_t gpio);
 void gpio_input(gpio_t gpio);
 void gpio_output(gpio_t gpio, int value);
-int _gpio_base3_value(const gpio_t gpio[], int num_gpio, int binary_first);
+uint32_t _gpio_base3_value(const gpio_t gpio[], int num_gpio, int binary_first);
 
 /*
  * This function may be implemented by SoC/board code to provide
@@ -60,9 +60,9 @@ uint16_t gpio_acpi_pin(gpio_t gpio);
  * There are also pulldown and pullup variants which default each gpio to
  * be configured with an internal pulldown and pullup, respectively.
  */
-int gpio_base2_value(const gpio_t gpio[], int num_gpio);
-int gpio_pulldown_base2_value(const gpio_t gpio[], int num_gpio);
-int gpio_pullup_base2_value(const gpio_t gpio[], int num_gpio);
+uint32_t gpio_base2_value(const gpio_t gpio[], int num_gpio);
+uint32_t gpio_pulldown_base2_value(const gpio_t gpio[], int num_gpio);
+uint32_t gpio_pullup_base2_value(const gpio_t gpio[], int num_gpio);
 
 /*
  * Read the value presented by the set of GPIOs, when each pin is interpreted
@@ -73,7 +73,7 @@ int gpio_pullup_base2_value(const gpio_t gpio[], int num_gpio);
  * gpio[]: pin positions to read. gpio[0] is less significant than gpio[1].
  * num_gpio: number of pins to read.
  */
-static inline int gpio_base3_value(const gpio_t gpio[], int num_gpio)
+static inline uint32_t gpio_base3_value(const gpio_t gpio[], int num_gpio)
 {
 	return _gpio_base3_value(gpio, num_gpio, 0);
 }
@@ -103,8 +103,8 @@ static inline int gpio_base3_value(const gpio_t gpio[], int num_gpio)
  * gpio[]: pin positions to read. gpio[0] is less significant than gpio[1].
  * num_gpio: number of pins to read.
  */
-static inline int gpio_binary_first_base3_value(const gpio_t gpio[],
-						int num_gpio)
+static inline uint32_t gpio_binary_first_base3_value(const gpio_t gpio[],
+						     int num_gpio)
 {
 	return _gpio_base3_value(gpio, num_gpio, 1);
 }