configs/stm32f103-minimum: Add board support for APA102 driver

configs/stm32f103-minimum/src/Makefile

@@ -61,6 +61,10 @@ ifeq ($(CONFIG_PWM),y)
   CSRCS += stm32_pwm.c
 endif
 
+ifeq ($(CONFIG_LEDS_APA102),y)
+  CSRCS += stm32_apa102.c
+endif
+
 ifeq ($(CONFIG_RGBLED),y)
   CSRCS += stm32_rgbled.c
 endif

configs/stm32f103-minimum/src/stm32_apa102.c

+/****************************************************************************
+ * configs/stm32f103-minium/src/stm32_apa102.c
+ *
+ *   Copyright (C) 2017 Alan Carvalho de Assis. All rights reserved.
+ *   Author: Alan Carvalho de Assis <acassis@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/spi/spi.h>
+#include <nuttx/leds/apa102.h>
+
+#include "stm32.h"
+#include "stm32_spi.h"
+#include "stm32f103_minimum.h"
+
+#if defined(CONFIG_SPI) && defined(CONFIG_STM32_SPI1) && \
+    defined(CONFIG_LEDS_APA102)
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define APA102_SPI_PORTNO 1   /* On SPI1 */
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: stm32_apa102init
+ *
+ * Description:
+ *   Initialize and register the APA102 LED Strip driver.
+ *
+ * Input parameters:
+ *   devpath - The full path to the driver to register. E.g., "/dev/leddrv0"
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno value on failure.
+ *
+ ************************************************************************************/
+
+int stm32_apa102init(FAR const char *devpath)
+{
+  FAR struct spi_dev_s *spi;
+  int ret;
+
+  spi = stm32_spibus_initialize(APA102_SPI_PORTNO);
+  if (spi == NULL)
+    {
+      return -ENODEV;
+    }
+
+  /* Register the APA102 Driver at the specified location. */
+
+  ret = apa102_register(devpath, spi);
+  if (ret < 0)
+    {
+      lederr("ERROR: apa102_register(%s) failed: %d\n",
+             devpath, ret);
+      return ret;
+    }
+
+  return OK;
+}
+
+#endif /* CONFIG_SPI && CONFIG_CAN_APA102 */

configs/stm32f103-minimum/src/stm32_bringup.c

@@ -194,6 +194,16 @@ int stm32_bringup(void)
     }
 #endif
 
+#ifdef CONFIG_LEDS_APA102
+  /* Configure and initialize the APA102 LED Strip. */
+
+  ret = stm32_apa102init("/dev/leddrv0");
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: stm32_apa102init() failed: %d\n", ret);
+    }
+#endif
+
 #ifdef CONFIG_RGBLED
   /* Configure and initialize the RGB LED. */
 

configs/stm32f103-minimum/src/stm32f103_minimum.h

@@ -249,6 +249,18 @@ int stm32_qencoder_initialize(FAR const char *devpath, int timer);
 int stm32_rgbled_setup(void);
 #endif
 
+/************************************************************************************
+ * Name: stm32_apa102init
+ *
+ * Description:
+ *   Initialize and register the APA102 LED Strip driver
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_LEDS_APA102
+int stm32_apa102init(FAR const char *devpath);
+#endif
+
 /************************************************************************************
  * Name: stm32_mcp2515initialize
  *