From d6edf766809c0fbf19a714f31fedff0a28fc3b3d Mon Sep 17 00:00:00 2001
From: Tapani Utriainen <tapani@technexion.com>
Date: Fri, 19 May 2017 22:13:46 +0800
Subject: [PATCH] mraa: add accessor functions to return counts of spi, pwm,
 gpio and adcs

Signed-off-by: Tapani Utriainen <tapani@technexion.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
---
 api/mraa/common.h | 28 ++++++++++++++++++++++++++++
 src/mraa.c        | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 64 insertions(+)

diff --git a/api/mraa/common.h b/api/mraa/common.h
index 4f5f828..3c8aba3 100644
--- a/api/mraa/common.h
+++ b/api/mraa/common.h
@@ -208,6 +208,34 @@ unsigned int mraa_get_pin_count();
  */
 int mraa_get_uart_count(void);
 
+/**
+ * Get the number of usable SPI buses, board must be initialised.
+ *
+ * @return number of usable SPI buses on the platform, returns -1 on failure.
+ */
+int mraa_get_spi_bus_count(void);
+
+/**
+ * Get the number of usable PWM pins, board must be initialised.
+ *
+ * @return number of PWMs on the current platform, -1 on failure.
+ */
+int mraa_get_pwm_count(void);
+
+/**
+ * Get the number of usable GPIOs, board must be initialised.
+ *
+ * @return number of usable external GPIO pins on the board, -1 on failure.
+ */
+int mraa_get_gpio_count(void);
+
+/**
+ * Get the number of usable analog pins, board must be initialised.
+ *
+ * @return number of usable ADC inputs on the platform and -1 on failure.
+ */
+int mraa_get_aio_bus_count(void);
+
 /**
  * Get platform usable I2C bus count, board must be initialised.
  *
diff --git a/src/mraa.c b/src/mraa.c
index 86a0472..d4aa217 100644
--- a/src/mraa.c
+++ b/src/mraa.c
@@ -759,6 +759,42 @@ mraa_get_uart_count(void)
     return plat->uart_dev_count;
 }
 
+int
+mraa_get_spi_count(void)
+{
+    if (plat == NULL) {
+        return -1;
+    }
+    return plat->spi_bus_count;
+}
+
+int
+mraa_get_pwm_count(void)
+{
+    if (plat == NULL) {
+        return -1;
+    }
+    return plat->pwm_dev_count;
+}
+
+int
+mraa_get_gpio_count(void)
+{
+    if (plat == NULL) {
+        return -1;
+    }
+    return plat->gpio_count;
+}
+
+int
+mraa_get_aio_count(void)
+{
+    if (plat == NULL) {
+        return -1;
+    }
+    return plat->aio_count;
+}
+
 int
 mraa_get_i2c_bus_count()
 {