bsps/beagle: Adding QEP driver support to BeagleBoneBlack BSP

1 files changed, 54 insertions, 0 deletions

diff --git a/bsps/arm/beagle/include/bsp/pwmss.h b/bsps/arm/beagle/include/bsp/pwmss.h
new file mode 100644
index 0000000000..3a9dcbb70a
--- /dev/null
+++ b/bsps/arm/beagle/include/bsp/pwmss.h
@@ -0,0 +1,54 @@
+/**
+ * @file
+ *
+ * @ingroup arm_beagle
+ *
+ * @brief Shared PWMSS module functions used by PWM, eQEP and eCAP (when added).
+ */
+
+/**
+ * Copyright (c) 2020 James Fitzsimons <james.fitzsimons@gmail.com>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ *.
+ */
+
+#ifndef LIBBSP_ARM_BEAGLE_PWMSS_H
+#define LIBBSP_ARM_BEAGLE_PWMSS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/* The following definitions are bitmasks for the clk control registers for
+ * the PWMSS module clocks. All three modules have the same clock control
+ * hence the EPMSSx to signify these values are consistent across all
+ * EPWMSS instances. */
+#define AM335X_CM_PER_EPWMSSx_CLKCTRL_MODULEMODE_ENABLE   (0x2u)
+#define AM335X_CM_PER_EPWMSSx_CLKCTRL_MODULEMODE   (0x00000003u)
+#define AM335X_CM_PER_EPWMSSx_CLKCTRL_IDLEST_FUNC  (0x0u)
+#define AM335X_CM_PER_EPWMSSx_CLKCTRL_IDLEST_SHIFT (0x00000010u)
+#define AM335X_CM_PER_EPWMSSx_CLKCTRL_IDLEST       (0x00030000u)
+
+/**
+ * @brief The set of possible PWM subsystem module
+ *
+ * Enumerated type to define various instance of pwm module.
+ */
+typedef enum {
+  BBB_PWMSS0 = 0,
+  BBB_PWMSS1,
+  BBB_PWMSS2,
+  BBB_PWMSS_COUNT
+} BBB_PWMSS;
+
+
+rtems_status_code pwmss_module_clk_config(BBB_PWMSS pwmss_id);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* LIBBSP_ARM_BEAGLE_PWMSS_H */