Date: Sat, 08 Feb 2014 22:57:20 +0100 From: Steven Lawrance <stl@koffein.net> To: freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: i.MX6 on-die temperature sensor Message-ID: <1391896463-sup-1007@luwak.koffein.net> In-Reply-To: <1391893231-sup-6174@luwak.koffein.net> References: <1391893231-sup-6174@luwak.koffein.net>
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Excerpts from Steven Lawrance's message of 2014-02-08 22:32:31 +0100:
> A patch is attached, but I've got a few questions, mostly about FDTs:
> order in the FDT? The current scenario seems quite fragile if that's
Another attempt at sending the patch -- it appears to have been
stripped the first time around.
--
Steven Lawrance
stl@koffein.net
--=-1391896640-307870-43411-8607-2-=
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Index: sys/arm/freescale/imx/files.imx6
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- sys/arm/freescale/imx/files.imx6 (revision 261623)
+++ sys/arm/freescale/imx/files.imx6 (working copy)
@@ -22,6 +22,8 @@
arm/freescale/imx/imx6_ccm.c standard
arm/freescale/imx/imx6_machdep.c standard
arm/freescale/imx/imx6_pl310.c standard
+arm/freescale/imx/imx6_ocotp.c standard
+arm/freescale/imx/imx6_tempmon.c standard
arm/freescale/imx/imx_machdep.c standard
arm/freescale/imx/imx_gpt.c standard
=
Index: sys/arm/freescale/imx/imx6_anatopreg.h
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- sys/arm/freescale/imx/imx6_anatopreg.h (revision 261623)
+++ sys/arm/freescale/imx/imx6_anatopreg.h (working copy)
@@ -101,6 +101,23 @@
#define IMX6_ANALOG_CCM_MISC2_CLR 0x178
#define IMX6_ANALOG_CCM_MISC2_TOG 0x17C
=
+#define IMX6_ANALOG_TEMPMON_TEMPSENSE0 0x180
+#define IMX6_ANALOG_TEMPMON_TEMPSENSE0_SET 0x184
+#define IMX6_ANALOG_TEMPMON_TEMPSENSE0_CLR 0x188
+#define IMX6_ANALOG_TEMPMON_TEMPSENSE0_TOG 0x18C
+#define IMX6_ANALOG_TEMPMON_TEMPSENSE0_TOG 0x18C
+#define IMX6_ANALOG_TEMPMON_TEMPSENSE0_TEMP_CNT_SHIFT 8
+#define IMX6_ANALOG_TEMPMON_TEMPSENSE0_TEMP_CNT_MASK \
+ (0xfff << IMX6_ANALOG_TEMPMON_TEMPSENSE0_TEMP_CNT_SHIFT)
+#define IMX6_ANALOG_TEMPMON_TEMPSENSE0_VALID 0x4
+#define IMX6_ANALOG_TEMPMON_TEMPSENSE0_MEASURE 0x2
+#define IMX6_ANALOG_TEMPMON_TEMPSENSE0_POWER_DOWN 0x1
+
+#define IMX6_ANALOG_TEMPMON_TEMPSENSE1 0x190
+#define IMX6_ANALOG_TEMPMON_TEMPSENSE1_SET 0x194
+#define IMX6_ANALOG_TEMPMON_TEMPSENSE1_CLR 0x198
+#define IMX6_ANALOG_TEMPMON_TEMPSENSE1_TOG 0x19C
+
#define IMX6_ANALOG_USB1_VBUS_DETECT 0x1A0
#define IMX6_ANALOG_USB1_VBUS_DETECT_SET 0x1A4
#define IMX6_ANALOG_USB1_VBUS_DETECT_CLR 0x1A8
Index: sys/arm/freescale/imx/imx6_ocotp.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- sys/arm/freescale/imx/imx6_ocotp.c (revision 0)
+++ sys/arm/freescale/imx/imx6_ocotp.c (working copy)
@@ -0,0 +1,150 @@
+/*-
+ * Copyright (c) 2014 Steven Lawrance <stl@koffein.net>
+ * 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 th=
e
+ * documentation and/or other materials provided with the distributio=
n.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AN=
D
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE=
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PU=
RPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIAB=
LE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUE=
NTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOO=
DS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)=
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, S=
TRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY=
WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY O=
F
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * Access to the Freescale i.MX6 On-Chip One-Time-Programmable Memory
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <machine/bus.h>
+
+#include <arm/freescale/imx/imx6_ocotpreg.h>
+#include <arm/freescale/imx/imx6_ocotpvar.h>
+#include <arm/freescale/imx/imx_machdep.h>
+
+struct ocotp_softc {
+ device_t dev;
+ struct resource *mem_res;
+};
+
+static struct ocotp_softc *ocotp_sc;
+
+static inline uint32_t
+RD4(struct ocotp_softc *sc, bus_size_t off)
+{
+ return (bus_read_4(sc->mem_res, off));
+}
+
+
+static int
+ocotp_detach(device_t dev)
+{
+ struct ocotp_softc *sc;
+
+ sc =3D device_get_softc(dev);
+
+ if (sc->mem_res !=3D NULL)
+ bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res);
+
+ ocotp_sc =3D NULL;
+
+ return (0);
+}
+
+static int
+ocotp_attach(device_t dev)
+{
+ struct ocotp_softc *sc;
+ int err, rid;
+
+ sc =3D device_get_softc(dev);
+ err =3D 0;
+
+ /* Allocate bus_space resources. */
+ rid =3D 0;
+ sc->mem_res =3D bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
+ RF_ACTIVE);
+ if (sc->mem_res =3D=3D NULL) {
+ device_printf(dev, "Cannot allocate memory resources\n");
+ err =3D ENXIO;
+ goto out;
+ }
+
+ ocotp_sc =3D sc;
+
+out:
+ if (err !=3D 0)
+ ocotp_detach(dev);
+
+ return (err);
+}
+
+static int
+ocotp_probe(device_t dev)
+{
+
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+
+ if (ofw_bus_is_compatible(dev, "fsl,imx6q-ocotp") =3D=3D 0)
+ return (ENXIO);
+
+ device_set_desc(dev, "Freescale i.MX6 On-Chip One-Time-Programmable Mem=
ory");
+
+ return (BUS_PROBE_DEFAULT);
+}
+
+int
+imx6_ocotp_read_4(bus_size_t off, uint32_t *val)
+{
+ if (!ocotp_sc)
+ return (ENXIO);
+
+ *val =3D RD4(ocotp_sc, off);
+ return (0);
+}
+
+static device_method_t ocotp_methods[] =3D {
+ /* Device interface */
+ DEVMETHOD(device_probe, ocotp_probe),
+ DEVMETHOD(device_attach, ocotp_attach),
+ DEVMETHOD(device_detach, ocotp_detach),
+
+ DEVMETHOD_END
+};
+
+static driver_t ocotp_driver =3D {
+ "ocotp",
+ ocotp_methods,
+ sizeof(struct ocotp_softc)
+};
+
+static devclass_t ocotp_devclass;
+
+DRIVER_MODULE(ocotp, simplebus, ocotp_driver, ocotp_devclass, 0, 0);
+
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Index: sys/arm/freescale/imx/imx6_ocotpreg.h
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- sys/arm/freescale/imx/imx6_ocotpreg.h (revision 0)
+++ sys/arm/freescale/imx/imx6_ocotpreg.h (working copy)
@@ -0,0 +1,79 @@
+/*-
+ * Copyright (c) 2014 Steven Lawrance <stl@koffein.net>
+ * 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 th=
e
+ * documentation and/or other materials provided with the distributio=
n.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AN=
D
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE=
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PU=
RPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIAB=
LE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUE=
NTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOO=
DS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)=
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, S=
TRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY=
WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY O=
F
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef IMX6_OCOTPREG_H
+#define IMX6_OCOTPREG_H
+
+#define IMX6_OCOTP_CTRL 0x000
+#define IMX6_OCOTP_CTRL_SET 0x004
+#define IMX6_OCOTP_CTRL_CLR 0x008
+#define IMX6_OCOTP_CTRL_TOG 0x00C
+#define IMX6_OCOTP_TIMING 0x010
+#define IMX6_OCOTP_DATA 0x020
+#define IMX6_OCOTP_READ_CTRL 0x030
+#define IMX6_OCOTP_READ_FUSE_DATA 0x040
+#define IMX6_OCOTP_SW_STICKY 0x050
+#define IMX6_OCOTP_SCS 0x060
+#define IMX6_OCOTP_SCS_SET 0x064
+#define IMX6_OCOTP_SCS_CLR 0x068
+#define IMX6_OCOTP_SCS_TOG 0x06C
+#define IMX6_OCOTP_VERSION 0x090
+#define IMX6_OCOTP_LOCK 0x400
+#define IMX6_OCOTP_CFG0 0x410
+#define IMX6_OCOTP_CFG1 0x420
+#define IMX6_OCOTP_CFG2 0x430
+#define IMX6_OCOTP_CFG3 0x440
+#define IMX6_OCOTP_CFG4 0x450
+#define IMX6_OCOTP_CFG5 0x460
+#define IMX6_OCOTP_CFG6 0x470
+#define IMX6_OCOTP_MEM0 0x480
+#define IMX6_OCOTP_MEM1 0x490
+#define IMX6_OCOTP_MEM2 0x4A0
+#define IMX6_OCOTP_MEM3 0x4B0
+#define IMX6_OCOTP_ANA0 0x4D0
+#define IMX6_OCOTP_ANA1 0x4E0
+#define IMX6_OCOTP_ANA2 0x4F0
+#define IMX6_OCOTP_SRK0 0x580
+#define IMX6_OCOTP_SRK1 0x590
+#define IMX6_OCOTP_SRK2 0x5A0
+#define IMX6_OCOTP_SRK3 0x5B0
+#define IMX6_OCOTP_SRK4 0x5C0
+#define IMX6_OCOTP_SRK5 0x5D0
+#define IMX6_OCOTP_SRK6 0x5E0
+#define IMX6_OCOTP_SRK7 0x5F0
+#define IMX6_OCOTP_HSJC_RESP0 0x600
+#define IMX6_OCOTP_HSJC_RESP1 0x610
+#define IMX6_OCOTP_MAC0 0x620
+#define IMX6_OCOTP_MAC1 0x630
+#define IMX6_OCOTP_GP1 0x660
+#define IMX6_OCOTP_GP2 0x670
+#define IMX6_OCOTP_MISC_CONF 0x6D0
+#define IMX6_OCOTP_FIELD_RETURN 0x6E0
+#define IMX6_OCOTP_SRK_REVOKE 0x6F0
+
+#endif
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Index: sys/arm/freescale/imx/imx6_ocotpvar.h
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- sys/arm/freescale/imx/imx6_ocotpvar.h (revision 0)
+++ sys/arm/freescale/imx/imx6_ocotpvar.h (working copy)
@@ -0,0 +1,34 @@
+/*-
+ * Copyright (c) 2014 Steven Lawrance <stl@koffein.net>
+ * 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 th=
e
+ * documentation and/or other materials provided with the distributio=
n.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AN=
D
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE=
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PU=
RPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIAB=
LE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUE=
NTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOO=
DS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)=
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, S=
TRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY=
WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY O=
F
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef IMX6_OCOTPVAR_H
+#define IMX6_OCOTPVAR_H
+
+int imx6_ocotp_read_4(bus_size_t _offset, uint32_t *_value);
+
+#endif
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Index: sys/arm/freescale/imx/imx6_tempmon.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- sys/arm/freescale/imx/imx6_tempmon.c (revision 0)
+++ sys/arm/freescale/imx/imx6_tempmon.c (working copy)
@@ -0,0 +1,203 @@
+/*-
+ * Copyright (c) 2014 Steven Lawrance <stl@koffein.net>
+ * 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 th=
e
+ * documentation and/or other materials provided with the distributio=
n.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AN=
D
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE=
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PU=
RPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIAB=
LE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUE=
NTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOO=
DS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)=
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, S=
TRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY=
WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY O=
F
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * Freescale i.MX6 Temperature Monitor (TEMPMON)
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/sysctl.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <machine/bus.h>
+
+#include <arm/freescale/imx/imx6_anatopreg.h>
+#include <arm/freescale/imx/imx6_anatopvar.h>
+#include <arm/freescale/imx/imx6_ocotpreg.h>
+#include <arm/freescale/imx/imx6_ocotpvar.h>
+#include <arm/freescale/imx/imx_machdep.h>
+
+#define TZ_ZEROC 2732
+
+struct tempmon_softc {
+ device_t dev;
+ uint32_t room_cnt;
+ uint32_t high_cnt;
+ uint32_t high_temp;
+ uint32_t last;
+};
+
+static struct tempmon_softc *tempmon_sc;
+
+static void
+update_count(void)
+{
+ uint32_t val;
+ =
+ val =3D imx6_anatop_read_4(IMX6_ANALOG_TEMPMON_TEMPSENSE0);
+ if (!(val & IMX6_ANALOG_TEMPMON_TEMPSENSE0_VALID))
+ return;
+ tempmon_sc->last =3D
+ (val & IMX6_ANALOG_TEMPMON_TEMPSENSE0_TEMP_CNT_MASK)
+ >> IMX6_ANALOG_TEMPMON_TEMPSENSE0_TEMP_CNT_SHIFT;
+}
+
+static int
+temperature_sysctl_handler(SYSCTL_HANDLER_ARGS)
+{
+ uint32_t t;
+ =
+ update_count();
+
+ t =3D tempmon_sc->high_temp * 1000
+ - (tempmon_sc->last - tempmon_sc->high_cnt)
+ * (tempmon_sc->high_temp * 1000 - 25000)
+ / (tempmon_sc->room_cnt - tempmon_sc->high_cnt);
+ t =3D t/100 + TZ_ZEROC;
+
+ return (sysctl_handle_int(oidp, &t, 0, req));
+}
+
+static int
+count_sysctl_handler(SYSCTL_HANDLER_ARGS)
+{
+ update_count();
+
+ return (sysctl_handle_int(oidp, &tempmon_sc->last, 0, req));
+}
+
+static int
+tempmon_detach(device_t dev)
+{
+ struct tempmon_softc *sc;
+
+ sc =3D device_get_softc(dev);
+
+ return (0);
+}
+
+static int
+tempmon_attach(device_t dev)
+{
+ struct tempmon_softc *sc;
+ uint32_t cal;
+ int err;
+ struct sysctl_ctx_list *ctx;
+
+ sc =3D device_get_softc(dev);
+
+ /*
+ * Fetch calibration data: a sensor count at room temperature (25C),
+ * a sensor count at a high temperature, and that temperature
+ */
+ err =3D imx6_ocotp_read_4(IMX6_OCOTP_ANA1, &cal);
+ if (err !=3D 0)
+ goto out;
+ sc->room_cnt =3D (cal & 0xFFF00000) >> 20;
+ sc->high_cnt =3D (cal & 0x000FFF00) >> 8;
+ sc->high_temp =3D cal & 0x000000FF;
+
+ /*
+ * Set the sensor to sample automatically every ~1 second
+ * and power it on.
+ */
+ imx6_anatop_write_4(IMX6_ANALOG_TEMPMON_TEMPSENSE1_SET, 0x8000);
+ imx6_anatop_write_4(IMX6_ANALOG_TEMPMON_TEMPSENSE0_SET,
+ IMX6_ANALOG_TEMPMON_TEMPSENSE0_MEASURE);
+ imx6_anatop_write_4(IMX6_ANALOG_TEMPMON_TEMPSENSE0_CLR,
+ IMX6_ANALOG_TEMPMON_TEMPSENSE0_POWER_DOWN);
+
+ ctx =3D device_get_sysctl_ctx(dev);
+ SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
+ OID_AUTO, "temperature", CTLTYPE_INT | CTLFLAG_RD, dev, 0,
+ temperature_sysctl_handler, "IK", "Current die temperature");
+ SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
+ OID_AUTO, "current_count", CTLTYPE_INT | CTLFLAG_RD, dev, 0,
+ count_sysctl_handler, "I", "Current sensor count");
+ SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
+ OID_AUTO, "room_temp_count", CTLTYPE_INT | CTLFLAG_RD,
+ &sc->room_cnt, 0, "Counter value at 25 degrees C");
+ SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
+ OID_AUTO, "high_temp_count", CTLTYPE_INT | CTLFLAG_RD,
+ &sc->high_cnt, 0, "Counter value at high calibration temperature");=
+ SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
+ OID_AUTO, "high_temp_value", CTLTYPE_INT | CTLFLAG_RD,
+ &sc->high_temp, 0, "Temperature at high value calibration");
+
+ tempmon_sc =3D sc;
+ err =3D 0;
+
+out:
+ if (err !=3D 0)
+ tempmon_detach(dev);
+
+ return (err);
+}
+
+static int
+tempmon_probe(device_t dev)
+{
+
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+
+ if (ofw_bus_is_compatible(dev, "fsl,imx6q-tempmon") =3D=3D 0)
+ return (ENXIO);
+
+ device_set_desc(dev, "Freescale i.MX6 Temperature Monitor");
+
+ return (BUS_PROBE_DEFAULT);
+}
+
+static device_method_t tempmon_methods[] =3D {
+ /* Device interface */
+ DEVMETHOD(device_probe, tempmon_probe),
+ DEVMETHOD(device_attach, tempmon_attach),
+ DEVMETHOD(device_detach, tempmon_detach),
+
+ DEVMETHOD_END
+};
+
+static driver_t tempmon_driver =3D {
+ "tempmon",
+ tempmon_methods,
+ sizeof(struct tempmon_softc)
+};
+
+static devclass_t tempmon_devclass;
+
+DRIVER_MODULE(tempmon, simplebus, tempmon_driver, tempmon_devclass, 0, 0=
);
+
Property changes on: sys/arm/freescale/imx/imx6_tempmon.c
___________________________________________________________________
Added: svn:mime-type
## -0,0 +1 ##
+text/plain
\ No newline at end of property
Added: svn:keywords
## -0,0 +1 ##
+FreeBSD=3D%H
\ No newline at end of property
Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
Index: sys/boot/fdt/dts/imx6.dtsi
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- sys/boot/fdt/dts/imx6.dtsi (revision 261623)
+++ sys/boot/fdt/dts/imx6.dtsi (working copy)
@@ -223,7 +223,7 @@
interrupts =3D <45>;
status =3D "disabled";
};
- =
+
};
=
aips@02100000 { /* AIPS2 */
@@ -317,6 +317,17 @@
bus-width =3D <0x4>;
status =3D"disabled";
};
+
+ ocotp0: ocotp@021bc000 {
+ compatible =3D "fsl,imx6q-ocotp";
+ reg =3D <0x021bc000 0x4000>;
+ status =3D"disabled";
+ }
};
+
+ tempmon: tempmon {
+ compatible =3D "fsl,imx6q-tempmon";
+ status =3D"disabled";
+ };
};
};
Index: sys/boot/fdt/dts/wandboard-quad.dts
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- sys/boot/fdt/dts/wandboard-quad.dts (revision 261623)
+++ sys/boot/fdt/dts/wandboard-quad.dts (working copy)
@@ -71,7 +71,9 @@
usdhc@02194000 { status =3D "okay"; };
usdhc@02198000 { status =3D "okay"; };
usdhc@0219c000 { status =3D "disabled"; };
+ ocotp@021bc000 { status =3D "okay"; };
};
+ tempmon { status =3D "okay"; };
};
=
chosen {
--=-1391896640-307870-43411-8607-2-=--
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