Module Name: src
Committed By: jmcneill
Date: Tue Sep 9 22:47:33 UTC 2014
Modified Files:
src/sys/dev/i2c: files.i2c
Added Files:
src/sys/dev/i2c: axp20x.c
Log Message:
AXP20x Power Management Unit driver, pretty basic at the moment -- only acts as
a temperature sensor
To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1 src/sys/dev/i2c/axp20x.c
cvs rdiff -u -r1.55 -r1.56 src/sys/dev/i2c/files.i2c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/dev/i2c/files.i2c
diff -u src/sys/dev/i2c/files.i2c:1.55 src/sys/dev/i2c/files.i2c:1.56
--- src/sys/dev/i2c/files.i2c:1.55 Tue Sep 9 22:44:32 2014
+++ src/sys/dev/i2c/files.i2c Tue Sep 9 22:47:33 2014
@@ -1,4 +1,4 @@
-# $NetBSD: files.i2c,v 1.55 2014/09/09 22:44:32 jmcneill Exp $
+# $NetBSD: files.i2c,v 1.56 2014/09/09 22:47:33 jmcneill Exp $
obsolete defflag opt_i2cbus.h I2C_SCAN
define i2cbus { }
@@ -215,3 +215,7 @@ device mpl115a: sysmon_envsys
attach mpl115a at iic
file dev/i2c/mpl115a.c mpl115a
+# AXP20x Power Management Unit
+device axp20x: sysmon_envsys
+attach axp20x at iic
+file dev/i2c/axp20x.c axp20x
Added files:
Index: src/sys/dev/i2c/axp20x.c
diff -u /dev/null src/sys/dev/i2c/axp20x.c:1.1
--- /dev/null Tue Sep 9 22:47:34 2014
+++ src/sys/dev/i2c/axp20x.c Tue Sep 9 22:47:33 2014
@@ -0,0 +1,123 @@
+/* $NetBSD: axp20x.c,v 1.1 2014/09/09 22:47:33 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2014 Jared D. McNeill <jmcne...@invisible.ca>
+ * 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 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>
+__KERNEL_RCSID(0, "$NetBSD: axp20x.c,v 1.1 2014/09/09 22:47:33 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/conf.h>
+#include <sys/bus.h>
+#include <sys/kmem.h>
+
+#include <dev/i2c/i2cvar.h>
+
+#include <dev/sysmon/sysmonvar.h>
+
+#define AXP_TEMP_MON_REG 0x5e /* 2 bytes */
+
+struct axp20x_softc {
+ device_t sc_dev;
+ i2c_tag_t sc_i2c;
+ i2c_addr_t sc_addr;
+
+ struct sysmon_envsys *sc_sme;
+ envsys_data_t sc_sensor_temp;
+};
+
+static int axp20x_match(device_t, cfdata_t, void *);
+static void axp20x_attach(device_t, device_t, void *);
+
+static void axp20x_sensors_refresh(struct sysmon_envsys *, envsys_data_t *);
+static int axp20x_read(struct axp20x_softc *, uint8_t, uint8_t *, size_t);
+
+CFATTACH_DECL_NEW(axp20x, sizeof(struct axp20x_softc),
+ axp20x_match, axp20x_attach, NULL, NULL);
+
+static int
+axp20x_match(device_t parent, cfdata_t match, void *aux)
+{
+ return 1;
+}
+
+static void
+axp20x_attach(device_t parent, device_t self, void *aux)
+{
+ struct axp20x_softc *sc = device_private(self);
+ struct i2c_attach_args *ia = aux;
+
+ sc->sc_dev = self;
+ sc->sc_i2c = ia->ia_tag;
+ sc->sc_addr = ia->ia_addr;
+
+ aprint_naive("\n");
+ aprint_normal("\n");
+
+ sc->sc_sme = sysmon_envsys_create();
+ sc->sc_sme->sme_name = device_xname(self);
+ sc->sc_sme->sme_cookie = sc;
+ sc->sc_sme->sme_refresh = axp20x_sensors_refresh;
+
+ sc->sc_sensor_temp.units = ENVSYS_STEMP;
+ sc->sc_sensor_temp.state = ENVSYS_SINVALID;
+ sc->sc_sensor_temp.flags = ENVSYS_FHAS_ENTROPY;
+ snprintf(sc->sc_sensor_temp.desc, sizeof(sc->sc_sensor_temp),
+ "internal temperature");
+ sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor_temp);
+
+ sysmon_envsys_register(sc->sc_sme);
+}
+
+static void
+axp20x_sensors_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
+{
+ struct axp20x_softc *sc = sme->sme_cookie;
+ uint8_t buf[2];
+ int error;
+
+ iic_acquire_bus(sc->sc_i2c, 0);
+ error = axp20x_read(sc, AXP_TEMP_MON_REG, buf, sizeof(buf));
+ iic_release_bus(sc->sc_i2c, 0);
+
+ if (error) {
+ edata->state = ENVSYS_SINVALID;
+ } else {
+ /* between -144.7C and 264.8C, step +0.1C */
+ edata->value_cur = (((buf[0] << 4) | (buf[1] & 0xf)) - 1447)
+ * 100000 + 273150000;
+ edata->state = ENVSYS_SVALID;
+ }
+}
+
+static int
+axp20x_read(struct axp20x_softc *sc, uint8_t reg, uint8_t *val, size_t len)
+{
+ return iic_smbus_block_read(sc->sc_i2c, sc->sc_addr,
+ reg, val, len, 0);
+}
