Module Name: src
Committed By: jmcneill
Date: Sun May 6 10:32:33 UTC 2018
Modified Files:
src/sys/conf: files
Added Files:
src/sys/dev/pwm: files.pwm pwm.c pwmvar.h
Log Message:
Add kernel API for pwm channels.
To generate a diff of this commit:
cvs rdiff -u -r1.1198 -r1.1199 src/sys/conf/files
cvs rdiff -u -r0 -r1.1 src/sys/dev/pwm/files.pwm src/sys/dev/pwm/pwm.c \
src/sys/dev/pwm/pwmvar.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/conf/files
diff -u src/sys/conf/files:1.1198 src/sys/conf/files:1.1199
--- src/sys/conf/files:1.1198 Sun Apr 8 13:38:31 2018
+++ src/sys/conf/files Sun May 6 10:32:33 2018
@@ -1,4 +1,4 @@
-# $NetBSD: files,v 1.1198 2018/04/08 13:38:31 jmcneill Exp $
+# $NetBSD: files,v 1.1199 2018/05/06 10:32:33 jmcneill Exp $
# @(#)files.newconf 7.5 (Berkeley) 5/10/93
version 20171118
@@ -387,6 +387,9 @@ include "dev/hid/files.hid"
# I2C device support
include "dev/i2c/files.i2c"
+# PWM device support
+include "dev/pwm/files.pwm"
+
# SPI device support
include "dev/spi/files.spi"
Added files:
Index: src/sys/dev/pwm/files.pwm
diff -u /dev/null src/sys/dev/pwm/files.pwm:1.1
--- /dev/null Sun May 6 10:32:33 2018
+++ src/sys/dev/pwm/files.pwm Sun May 6 10:32:33 2018
@@ -0,0 +1,5 @@
+# $NetBSD: files.pwm,v 1.1 2018/05/06 10:32:33 jmcneill Exp $
+
+define pwm
+
+file dev/pwm/pwm.c pwm
Index: src/sys/dev/pwm/pwm.c
diff -u /dev/null src/sys/dev/pwm/pwm.c:1.1
--- /dev/null Sun May 6 10:32:33 2018
+++ src/sys/dev/pwm/pwm.c Sun May 6 10:32:33 2018
@@ -0,0 +1,63 @@
+/* $NetBSD: pwm.c,v 1.1 2018/05/06 10:32:33 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2018 Jared McNeill <[email protected]>
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: pwm.c,v 1.1 2018/05/06 10:32:33 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+
+#include <dev/pwm/pwmvar.h>
+
+int
+pwm_enable(pwm_tag_t pwm)
+{
+ return pwm->pwm_enable(pwm, true);
+}
+
+int
+pwm_disable(pwm_tag_t pwm)
+{
+ return pwm->pwm_enable(pwm, false);
+}
+
+int
+pwm_get_config(pwm_tag_t pwm, struct pwm_config *conf)
+{
+ return pwm->pwm_get_config(pwm, conf);
+}
+
+int
+pwm_set_config(pwm_tag_t pwm, const struct pwm_config *conf)
+{
+ if (conf->period < conf->duty_cycle)
+ return EINVAL;
+
+ return pwm->pwm_set_config(pwm, conf);
+}
Index: src/sys/dev/pwm/pwmvar.h
diff -u /dev/null src/sys/dev/pwm/pwmvar.h:1.1
--- /dev/null Sun May 6 10:32:33 2018
+++ src/sys/dev/pwm/pwmvar.h Sun May 6 10:32:33 2018
@@ -0,0 +1,59 @@
+/* $NetBSD: pwmvar.h,v 1.1 2018/05/06 10:32:33 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2018 Jared McNeill <[email protected]>
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+#ifndef _DEV_PWM_PWMVAR_H
+#define _DEV_PWM_PWMVAR_H
+
+enum pwm_polarity {
+ PWM_ACTIVE_HIGH,
+ PWM_ACTIVE_LOW
+};
+
+struct pwm_config {
+ u_int period; /* nanoseconds */
+ u_int duty_cycle; /* nanoseconds */
+ enum pwm_polarity polarity; /* PWM_ACTIVE_{HIGH,LOW} */
+};
+
+typedef struct pwm_controller {
+ int (*pwm_enable)(struct pwm_controller *, bool);
+ int (*pwm_get_config)(struct pwm_controller *,
+ struct pwm_config *);
+ int (*pwm_set_config)(struct pwm_controller *,
+ const struct pwm_config *);
+
+ device_t pwm_dev; /* device */
+ void *pwm_priv; /* driver private data */
+} *pwm_tag_t;
+
+int pwm_enable(pwm_tag_t);
+int pwm_disable(pwm_tag_t);
+int pwm_get_config(pwm_tag_t, struct pwm_config *);
+int pwm_set_config(pwm_tag_t, const struct pwm_config *);
+
+#endif /* _DEV_PWM_PWMVAR_H */
