iot2050: Add USER button

A simple GPIO, no muxing needed, no pulling supported. Therefore, reject any mode changes that request pull up/down, ignore the others. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
eclipse · Aug 5, 2022 · 8b1c549 · 8b1c549
1 parent a9f0ff2
commit 8b1c549
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Showing 2 changed files with 25 additions and 1 deletion.
diff --git a/include/arm/siemens/iot2050.h b/include/arm/siemens/iot2050.h
@@ -30,7 +30,7 @@ extern "C" {
 #include "mraa_internal.h"
 
 #define PLATFORM_NAME                   "SIMATIC IOT2050"
-#define MRAA_IOT2050_PINCOUNT          (20)
+#define MRAA_IOT2050_PINCOUNT          21
 
 mraa_board_t *
         mraa_siemens_iot2050();

diff --git a/src/arm/siemens/iot2050.c b/src/arm/siemens/iot2050.c
@@ -154,6 +154,11 @@ iot2050_gpio_mode_replace(mraa_gpio_context dev, mraa_gpio_mode_t mode)
         ret = MRAA_ERROR_INVALID_RESOURCE;
         goto failed;
     }
+    /* Handle mode changes for interface pins without pull pin */
+    if (pull_en_pins[dev->phy_pin] == -1) {
+        return (mode == MRAA_GPIO_STRONG || mode == MRAA_GPIO_HIZ) ?
+            MRAA_SUCCESS : MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
+    }
     info = iot2050_get_regmux_by_pinmap(dev->pin);
     pull_en_pin = mraa_gpio_init_raw(pull_en_pins[dev->phy_pin]);
     if(pull_en_pin == NULL) {
@@ -1207,6 +1212,25 @@ mraa_siemens_iot2050()
     iot2050_pin_add_aio(b, pin_index, 5, mux_info, 5);
     pin_index++;
 
+    iot2050_setup_pins(b, pin_index, "USER",
+                        (mraa_pincapabilities_t) {
+                            1,  /*valid*/
+                            1,  /*gpio*/
+                            0,  /*pwm*/
+                            0,  /*fast gpio*/
+                            0,  /*spi*/
+                            0,  /*i2c*/
+                            0,  /*aio*/
+                            0}, /*uart*/
+                        (regmux_info_t) {
+                            -1,
+                            -1,
+                            wkup_gpio0_base+25,
+                            {}
+                        });
+    iot2050_pin_add_gpio(b, pin_index, wkup_gpio0_chip, 25, -1, -1, NULL, 0);
+    pin_index++;
+
     /* UART */
     iot2050_setup_uart(b, "UART0", "/dev/ttyS1", "IO0", "IO1", "IO2", "IO3");
     b->def_uart_dev = 0;