Signed-off-by: Bill Gatliff <bgat@xxxxxxxxxxxxxxx>
---
include/linux/pwm.h | 168 ++++++++++++++++++++++++++++++++++++++++++++------
1 files changed, 147 insertions(+), 21 deletions(-)
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index 3945f80..d3d18f7 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -1,31 +1,157 @@
#ifndef __LINUX_PWM_H
#define __LINUX_PWM_H
-struct pwm_device;
-
/*
- * pwm_request - request a PWM device
+ * include/linux/pwm.h
+ *
+ * Copyright (C) 2008 Bill Gatliff
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-struct pwm_device *pwm_request(int pwm_id, const char *label);
-/*
- * pwm_free - free a PWM device
- */
-void pwm_free(struct pwm_device *pwm);
+enum {
+ PWM_CONFIG_DUTY_TICKS = BIT(0),
+ PWM_CONFIG_PERIOD_TICKS = BIT(1),
+ PWM_CONFIG_POLARITY = BIT(2),
+ PWM_CONFIG_START = BIT(3),
+ PWM_CONFIG_STOP = BIT(4),
-/*
- * pwm_config - change a PWM device configuration
- */
-int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns);
+ PWM_CONFIG_HANDLER = BIT(5),
-/*
- * pwm_enable - start a PWM output toggling
- */
-int pwm_enable(struct pwm_device *pwm);
+ PWM_CONFIG_DUTY_NS = BIT(6),
+ PWM_CONFIG_DUTY_PERCENT = BIT(7),
+ PWM_CONFIG_PERIOD_NS = BIT(8),
+};
+
+struct pwm_channel;
+struct work_struct;
+
+typedef int (*pwm_handler_t)(struct pwm_channel *p, void *data);
+typedef void (*pwm_callback_t)(struct pwm_channel *p);
+
+struct pwm_channel_config {
+ int config_mask;
+ unsigned long duty_ticks;
+ unsigned long period_ticks;
+ int polarity;
+
+ pwm_handler_t handler;
+
+ unsigned long duty_ns;
+ unsigned long period_ns;
+ int duty_percent;
+};
+
+struct pwm_device {
+ struct list_head list;
+ spinlock_t list_lock;
+ struct device *dev;
+ struct module *owner;
+ struct pwm_channel *channels;
+
+ const char *bus_id;
+ int nchan;
+
+ int (*request) (struct pwm_channel *p);
+ void (*free) (struct pwm_channel *p);
+ int (*config) (struct pwm_channel *p,
+ struct pwm_channel_config *c);
+ int (*config_nosleep)(struct pwm_channel *p,
+ struct pwm_channel_config *c);
+ int (*synchronize) (struct pwm_channel *p,
+ struct pwm_channel *to_p);
+ int (*unsynchronize)(struct pwm_channel *p,
+ struct pwm_channel *from_p);
+ int (*set_callback) (struct pwm_channel *p,
+ pwm_callback_t callback);
+};
+
+int pwm_register(struct pwm_device *pwm);
+int pwm_unregister(struct pwm_device *pwm);
+
+enum {
+ FLAG_REQUESTED = 0,
+ FLAG_STOP = 1,
+};
+
+struct pwm_channel {
+ struct list_head list;
+ struct pwm_device *pwm;
+ const char *requester;
+ int chan;
+ unsigned long flags;
+ unsigned long tick_hz;
+
+ spinlock_t lock;
+ struct completion complete;
+
+ pwm_callback_t callback;
+
+ struct work_struct handler_work;
+ pwm_handler_t handler;
+ void *handler_data;
+
+ int active_low;
+ unsigned long period_ticks;
+ unsigned long duty_ticks;
+};
+
+struct pwm_channel *
+pwm_request(const char *bus_id, int chan,
+ const char *requester);
+
+void pwm_free(struct pwm_channel *pwm);
+
+int pwm_config_nosleep(struct pwm_channel *pwm,
+ struct pwm_channel_config *c);
+
+int pwm_config(struct pwm_channel *pwm,
+ struct pwm_channel_config *c);
+
+unsigned long pwm_ns_to_ticks(struct pwm_channel *pwm,
+ unsigned long nsecs);
+
+unsigned long pwm_ticks_to_ns(struct pwm_channel *pwm,
+ unsigned long ticks);
+
+int pwm_period_ns(struct pwm_channel *pwm,
+ unsigned long period_ns);
+
+int pwm_duty_ns(struct pwm_channel *pwm,
+ unsigned long duty_ns);
+
+int pwm_duty_percent(struct pwm_channel *pwm,
+ int percent);
+
+int pwm_polarity(struct pwm_channel *pwm,
+ int active_high);
+
+int pwm_start(struct pwm_channel *pwm);
+
+int pwm_stop(struct pwm_channel *pwm);
+
+int pwm_set_handler(struct pwm_channel *pwm,
+ pwm_handler_t handler,
+ void *data);
+
+int pwm_synchronize(struct pwm_channel *p,
+ struct pwm_channel *to_p);
+
+
+int pwm_unsynchronize(struct pwm_channel *p,
+ struct pwm_channel *from_p);
-/*
- * pwm_disable - stop a PWM output toggling
- */
-void pwm_disable(struct pwm_device *pwm);
-#endif /* __ASM_ARCH_PWM_H */
+#endif /* __LINUX_PWM_H */
--
1.5.6.5
--
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