ports: analog: Improve supervisor portability in GPIO init

- Add gpio_init function to normalize disparate GPIO_Init usage of port parameter
- Modify ticks usage in interrupt_after_ticks to fix possible zero result from integer division

Signed-off-by: Brandon-Hurst <brandon.hurst97@gmail.com>

Author: Brandon-Hurst

ports/analog/max32_port.h

@@ -22,6 +22,9 @@
 #include "system_max32690.h"
 #include "max32690.h"
 
+// GPIO ports & initialization
+#include "peripherals/max32690/gpios.h"
+
 // UART Ports & pins
 #include "peripherals/max32690/max32_uart.h"
 #include "peripherals/max32690/max32_i2c.h"
@@ -66,7 +69,10 @@
 // 12-bit ssec register, ticks @ 4096 Hz
 #define SUBSEC_PER_TICK 4
 
-// UART Ports & pins
+// GPIO ports & initialization
+#include "peripherals/max32650/gpios.h"
+
+// BUSIO Ports & pins
 #include "peripherals/max32650/max32_uart.h"
 #include "peripherals/max32650/max32_i2c.h"
 #include "peripherals/max32650/max32_spi.h"
@@ -79,7 +85,10 @@
 // 12-bit ssec register, ticks @ 4096 Hz
 #define SUBSEC_PER_TICK 4
 
-// UART Ports & pins
+// GPIO ports & initialization
+#include "peripherals/max32665/gpios.h"
+
+// BUSIO Ports & pins
 #include "peripherals/max32665/max32_uart.h"
 #include "peripherals/max32665/max32_i2c.h"
 #include "peripherals/max32665/max32_spi.h"

ports/analog/peripherals/max32650/gpios.c

@@ -8,3 +8,7 @@
 
 volatile mxc_gpio_regs_t *gpio_ports[NUM_GPIO_PORTS] =
 {MXC_GPIO0, MXC_GPIO1, MXC_GPIO2, MXC_GPIO3};
+
+int32_t gpio_init(uint32_t port) {
+    return MXC_GPIO_Init(port);
+}

ports/analog/peripherals/max32650/gpios.h

@@ -13,3 +13,5 @@
 #include "gpio.h"
 #include "gpio_regs.h"
 #include "max32650.h"
+
+int32_t gpio_init(uint32_t port);

ports/analog/peripherals/max32665/gpios.c

@@ -8,3 +8,7 @@
 
 volatile mxc_gpio_regs_t *gpio_ports[NUM_GPIO_PORTS] =
 {MXC_GPIO0, MXC_GPIO1};
+
+int32_t gpio_init(uint32_t port) {
+    return MXC_GPIO_Init(1 << port);
+}

ports/analog/peripherals/max32665/gpios.h

@@ -13,3 +13,5 @@
 #include "gpio.h"
 #include "gpio_regs.h"
 #include "max32665.h"
+
+int32_t gpio_init(uint32_t portmask);

ports/analog/peripherals/max32690/gpios.c

@@ -8,3 +8,7 @@
 
 volatile mxc_gpio_regs_t *gpio_ports[NUM_GPIO_PORTS] =
 {MXC_GPIO0, MXC_GPIO1, MXC_GPIO2, MXC_GPIO3, MXC_GPIO4};
+
+int32_t gpio_init(uint32_t port) {
+    return MXC_GPIO_Init(1 << port);
+}

ports/analog/peripherals/max32690/gpios.h

@@ -13,3 +13,5 @@
 #include "gpio.h"
 #include "gpio_regs.h"
 #include "max32690.h"
+
+int32_t gpio_init(uint32_t portmask);

ports/analog/supervisor/port.c

@@ -124,7 +124,7 @@ safe_mode_t port_init(void) {
 
     // Enable GPIO (enables clocks + common init for ports)
     for (int i = 0; i < MXC_CFG_GPIO_INSTANCES; i++) {
-        err = MXC_GPIO_Init(0x1 << i);
+        err = gpio_init(i);
         if (err) {
             return SAFE_MODE_PROGRAMMATIC;
         }
@@ -282,7 +282,7 @@ void port_disable_tick(void) {
 void port_interrupt_after_ticks(uint32_t ticks) {
     uint32_t ticks_msec = 0;
 
-    ticks_msec = (ticks / TICKS_PER_SEC) * 1000;
+    ticks_msec = ((ticks * 1000) / TICKS_PER_SEC);
 
     // Disable RTC interrupts
     MXC_RTC_DisableInt(SSEC_ENABLE | TOD_ENABLE | RDY_ENABLE);