Add a minimal regulator "framework".

ok jsg@, patrick@

2 files changed, 105 insertions, 0 deletions

diff --git a/sys/dev/ofw/ofw_regulator.c b/sys/dev/ofw/ofw_regulator.c
new file mode 100644
index 00000000000..3b2d352f855
--- /dev/null
+++ b/sys/dev/ofw/ofw_regulator.c
@@ -0,0 +1,81 @@
+/*	$OpenBSD: ofw_regulator.c,v 1.1 2016/08/13 10:52:21 kettenis Exp $	*/
+/*
+ * Copyright (c) 2016 Mark Kettenis
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_gpio.h>
+#include <dev/ofw/ofw_pinctrl.h>
+#include <dev/ofw/ofw_regulator.h>
+
+int
+regulator_set(uint32_t phandle, int enable)
+{
+	uint32_t *gpio;
+	uint32_t startup_delay;
+	int active;
+	int node;
+	int len;
+
+	node = OF_getnodebyphandle(phandle);
+	if (node == 0)
+		return -1;
+
+	if (!OF_is_compatible(node, "regulator-fixed"))
+		return -1;
+
+	pinctrl_byname(node, "default");
+
+	if (OF_getproplen(node, "enable-active-high") == 0)
+		active = 1;
+	else
+		active = 0;
+
+	/* The "gpio" property is optional. */
+	len = OF_getproplen(node, "gpio");
+	if (len < 0)
+		return 0;
+
+	gpio = malloc(len, M_TEMP, M_WAITOK);
+	OF_getpropintarray(node, "gpio", gpio, len);
+	gpio_controller_config_pin(gpio, GPIO_CONFIG_OUTPUT);
+	if (enable)
+		gpio_controller_set_pin(gpio, active);
+	else
+		gpio_controller_set_pin(gpio, !active);
+	free(gpio, M_TEMP, len);
+
+	startup_delay = OF_getpropint(node, "startup-delay-us", 0);
+	if (enable && startup_delay > 0)
+		delay(startup_delay);
+
+	return 0;
+}
+
+int
+regulator_enable(uint32_t phandle)
+{
+	return regulator_set(phandle, 1);
+}
+
+int
+regulator_disable(uint32_t phandle)
+{
+	return regulator_set(phandle, 0);
+}
diff --git a/sys/dev/ofw/ofw_regulator.h b/sys/dev/ofw/ofw_regulator.h
new file mode 100644
index 00000000000..f4f7976e983
--- /dev/null
+++ b/sys/dev/ofw/ofw_regulator.h
@@ -0,0 +1,24 @@
+/*	$OpenBSD: ofw_regulator.h,v 1.1 2016/08/13 10:52:21 kettenis Exp $	*/
+/*
+ * Copyright (c) 2016 Mark Kettenis
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _DEV_OFW_REGULATOR_H_
+#define _DEV_OFW_REGULATOR_H_
+
+int	regulator_enable(uint32_t);
+int	regulator_disable(uint32_t);
+
+#endif /* _DEV_OFW_GPIO_H_ */