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[src/trunk]: src/sys/dev/i2c Add a callback to change the regulator outputs.
details: https://anonhg.NetBSD.org/src/rev/c4daadbe7e8f
branches: trunk
changeset: 797544:c4daadbe7e8f
user: bouyer <bouyer%NetBSD.org@localhost>
date: Sun Jul 20 23:01:22 2014 +0000
description:
Add a callback to change the regulator outputs.
Tested on beaglebone.
diffstat:
sys/dev/i2c/tps65217pmic.c | 89 ++++++++++++++++++++++++++++++++++++++----
sys/dev/i2c/tps65217pmicreg.h | 8 +++-
sys/dev/i2c/tps65217pmicvar.h | 38 ++++++++++++++++++
3 files changed, 125 insertions(+), 10 deletions(-)
diffs (205 lines):
diff -r 2c4a56ac7c6a -r c4daadbe7e8f sys/dev/i2c/tps65217pmic.c
--- a/sys/dev/i2c/tps65217pmic.c Sun Jul 20 23:00:49 2014 +0000
+++ b/sys/dev/i2c/tps65217pmic.c Sun Jul 20 23:01:22 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: tps65217pmic.c,v 1.9 2014/01/08 16:49:48 jakllsch Exp $ */
+/* $NetBSD: tps65217pmic.c,v 1.10 2014/07/20 23:01:22 bouyer Exp $ */
/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -35,7 +35,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tps65217pmic.c,v 1.9 2014/01/08 16:49:48 jakllsch Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tps65217pmic.c,v 1.10 2014/07/20 23:01:22 bouyer Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -49,6 +49,7 @@
#include <dev/sysmon/sysmonvar.h>
#include <dev/i2c/tps65217pmicreg.h>
+#include <dev/i2c/tps65217pmicvar.h>
#define NTPS_REG 7
#define SNUM_REGS NTPS_REG-1
@@ -608,26 +609,49 @@
return rv;
}
+static void
+tps65217pmic_reg_write_unlocked(struct tps65217pmic_softc *sc,
+ uint8_t reg, uint8_t data)
+{
+ uint8_t wbuf[2];
+
+ wbuf[0] = reg;
+ wbuf[1] = data;
+
+ if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, NULL, 0,
+ wbuf, 2, I2C_F_POLL)) {
+ aprint_error_dev(sc->sc_dev, "cannot execute I2C write\n");
+ }
+}
+
static void __unused
tps65217pmic_reg_write(struct tps65217pmic_softc *sc, uint8_t reg, uint8_t data)
{
- uint8_t wbuf[2];
if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL) != 0) {
aprint_error_dev(sc->sc_dev, "cannot acquire bus for write\n");
return;
}
- wbuf[0] = reg;
- wbuf[1] = data;
+ tps65217pmic_reg_write_unlocked(sc, reg, data);
+
+ iic_release_bus(sc->sc_tag, I2C_F_POLL);
+}
- if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, wbuf,
- 2, NULL, 0, I2C_F_POLL)) {
- aprint_error_dev(sc->sc_dev, "cannot execute I2C write\n");
- iic_release_bus(sc->sc_tag, I2C_F_POLL);
+static void
+tps65217pmic_reg_write_l2(struct tps65217pmic_softc *sc,
+ uint8_t reg, uint8_t data)
+{
+ uint8_t regpw = reg ^ TPS65217PMIC_PASSWORD_XOR;
+ if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL) != 0) {
+ aprint_error_dev(sc->sc_dev, "cannot acquire bus for write\n");
return;
}
+ tps65217pmic_reg_write_unlocked(sc, TPS65217PMIC_PASSWORD, regpw);
+ tps65217pmic_reg_write_unlocked(sc, reg, data);
+ tps65217pmic_reg_write_unlocked(sc, TPS65217PMIC_PASSWORD, regpw);
+ tps65217pmic_reg_write_unlocked(sc, reg, data);
iic_release_bus(sc->sc_tag, I2C_F_POLL);
}
@@ -702,3 +726,50 @@
mutex_exit(&sc->sc_lock);
}
+int
+tps65217pmic_set_volt(device_t self, const char *name, int mvolt)
+{
+ int i;
+ struct tps65217pmic_softc *sc = device_private(self);
+ struct tps_reg_param *regulator = NULL;
+ uint8_t val;
+
+ for (i = 0; i < __arraycount(tps_regulators); i++) {
+ if (strcmp(name, tps_regulators[i].name) == 0) {
+ regulator = &tps_regulators[i];
+ break;
+ }
+ }
+ if (regulator == NULL)
+ return EINVAL;
+
+ if (regulator->voltage_min > mvolt || regulator->voltage_max < mvolt)
+ return EINVAL;
+
+ if (!regulator->is_enabled)
+ return EINVAL;
+
+ if (regulator->is_tracking)
+ return EINVAL;
+
+ if (regulator->is_xadj)
+ return EINVAL;
+
+ /* find closest voltage entry */
+ for (i = 0; i < regulator->nvoltages; i++) {
+ if (mvolt <= regulator->voltages[i]) {
+ break;
+ }
+ }
+ KASSERT(i < regulator->nvoltages);
+ tps65217pmic_reg_write_l2(sc, regulator->defreg_num, i);
+
+ val = tps65217pmic_reg_read(sc, TPS65217PMIC_DEFSLEW);
+ val |= TPS65217PMIC_DEFSLEW_GO;
+ tps65217pmic_reg_write_l2(sc, TPS65217PMIC_DEFSLEW, val);
+
+ while (val & TPS65217PMIC_DEFSLEW_GO) {
+ val = tps65217pmic_reg_read(sc, TPS65217PMIC_DEFSLEW);
+ }
+ return 0;
+}
diff -r 2c4a56ac7c6a -r c4daadbe7e8f sys/dev/i2c/tps65217pmicreg.h
--- a/sys/dev/i2c/tps65217pmicreg.h Sun Jul 20 23:00:49 2014 +0000
+++ b/sys/dev/i2c/tps65217pmicreg.h Sun Jul 20 23:01:22 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: tps65217pmicreg.h,v 1.6 2013/08/04 00:24:28 rkujawa Exp $ */
+/* $NetBSD: tps65217pmicreg.h,v 1.7 2014/07/20 23:01:22 bouyer Exp $ */
/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -83,6 +83,9 @@
#define TPS65217PMIC_STATUS_USBPWR __BIT(2)
#define TPS65217PMIC_STATUS_ACPWR __BIT(3)
+#define TPS65217PMIC_PASSWORD 0x0B
+#define TPS65217PMIC_PASSWORD_XOR 0x7d
+
#define TPS65217PMIC_PGOOD 0x0C
#define TPS65217PMIC_PGOOD_LDO3PG __BIT(0)
#define TPS65217PMIC_PGOOD_LDO4PG __BIT(1)
@@ -92,6 +95,9 @@
#define TPS65217PMIC_PGOOD_LDO1PG __BIT(5)
#define TPS65217PMIC_PGOOD_LDO2PG __BIT(6)
+#define TPS65217PMIC_DEFSLEW 0x11
+#define TPS65217PMIC_DEFSLEW_GO __BIT(7)
+
#define TPS65217PMIC_DEFLDO1 0x12
#define TPS65217PMIC_DEFLDO2 0x13
#define TPS65217PMIC_DEFLDO3 0x14
diff -r 2c4a56ac7c6a -r c4daadbe7e8f sys/dev/i2c/tps65217pmicvar.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/i2c/tps65217pmicvar.h Sun Jul 20 23:01:22 2014 +0000
@@ -0,0 +1,38 @@
+/* $NetBSD: tps65217pmicvar.h,v 1.1 2014/07/20 23:01:22 bouyer Exp $ */
+
+/*-
+ * Copyright (c) 2013 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Radoslaw Kujawa.
+ *
+ * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+/*#include <sys/cdefs.h>*/
+
+#ifndef _TPS65217PMICVAR_H_
+#define _TPS65217PMICVAR_H_
+int tps65217pmic_set_volt(device_t, const char *, int);
+#endif /* _TPS65217PMICVAR_H_ */
+
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