[src/trunk]: src/sys/dev/i2c Add basic driver for AMS AS3722 power management IC

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/c80c92189db3
branches:  trunk
changeset: 811695:c80c92189db3
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Wed Nov 11 12:35:22 2015 +0000

description:
Add basic driver for AMS AS3722 power management IC

diffstat:

 sys/dev/i2c/as3722.c  |  130 ++++++++++++++++++++++++++++++++++++++++++++++++++
 sys/dev/i2c/as3722.h  |   34 +++++++++++++
 sys/dev/i2c/files.i2c |    7 ++-
 3 files changed, 170 insertions(+), 1 deletions(-)

diffs (190 lines):

diff -r 69444fa6e6a5 -r c80c92189db3 sys/dev/i2c/as3722.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/i2c/as3722.c      Wed Nov 11 12:35:22 2015 +0000
@@ -0,0 +1,130 @@
+/* $NetBSD: as3722.c,v 1.1 2015/11/11 12:35:22 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
+ * 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: as3722.c,v 1.1 2015/11/11 12:35:22 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+#include <sys/conf.h>
+#include <sys/bus.h>
+#include <sys/kmem.h>
+
+#include <dev/i2c/i2cvar.h>
+#include <dev/i2c/as3722.h>
+
+#define AS3722_RESET_CTRL_REG          0x36
+#define AS3722_RESET_CTRL_POWER_OFF    __BIT(1)
+
+#define AS3722_ASIC_ID1_REG            0x90
+#define AS3722_ASIC_ID2_REG            0x91
+
+struct as3722_softc {
+       device_t        sc_dev;
+       i2c_tag_t       sc_i2c;
+       i2c_addr_t      sc_addr;
+};
+
+static int     as3722_match(device_t, cfdata_t, void *);
+static void    as3722_attach(device_t, device_t, void *);
+
+#if 0
+static int     as3722_read(struct as3722_softc *, uint8_t, uint8_t *, int);
+#endif
+static int     as3722_write(struct as3722_softc *, uint8_t, uint8_t, int);
+
+CFATTACH_DECL_NEW(as3722pmic, sizeof(struct as3722_softc),
+    as3722_match, as3722_attach, NULL, NULL);
+
+static int
+as3722_match(device_t parent, cfdata_t match, void *aux)
+{
+       struct i2c_attach_args *ia = aux;
+       uint8_t reg, id1;
+       int error;
+
+       iic_acquire_bus(ia->ia_tag, I2C_F_POLL);
+       reg = AS3722_ASIC_ID1_REG;
+       error = iic_exec(ia->ia_tag, I2C_OP_READ_WITH_STOP, ia->ia_addr,
+           &reg, 1, &id1, 1, I2C_F_POLL);
+       iic_release_bus(ia->ia_tag, I2C_F_POLL);
+
+       if (error == 0 && id1 == 0x0c)
+               return 1;
+
+       return 0;
+}
+
+static void
+as3722_attach(device_t parent, device_t self, void *aux)
+{
+       struct as3722_softc * const 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(": AMS AS3822\n");
+}
+
+#if 0
+static int
+as3722_read(struct as3722_softc *sc, uint8_t reg, uint8_t *val, int flags)
+{
+       return iic_exec(sc->sc_i2c, I2C_OP_READ_WITH_STOP, sc->sc_addr,
+           &reg, 1, val, 1, flags);
+}
+#endif
+
+static int
+as3722_write(struct as3722_softc *sc, uint8_t reg, uint8_t val, int flags)
+{
+       uint8_t buf[2] = { reg, val };
+       return iic_exec(sc->sc_i2c, I2C_OP_WRITE_WITH_STOP, sc->sc_addr,
+           NULL, 0, buf, 2, flags);
+}
+
+int
+as3722_poweroff(device_t dev)
+{
+       struct as3722_softc * const sc = device_private(dev);
+       int error;
+
+       const int flags = I2C_F_POLL;
+
+       iic_acquire_bus(sc->sc_i2c, flags);
+       error = as3722_write(sc, AS3722_RESET_CTRL_REG,
+           AS3722_RESET_CTRL_POWER_OFF, flags);
+       iic_release_bus(sc->sc_i2c, flags);
+
+       return error;
+}
diff -r 69444fa6e6a5 -r c80c92189db3 sys/dev/i2c/as3722.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/i2c/as3722.h      Wed Nov 11 12:35:22 2015 +0000
@@ -0,0 +1,34 @@
+/* $NetBSD: as3722.h,v 1.1 2015/11/11 12:35:22 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
+ * 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.
+ */
+
+#ifndef _DEV_I2C_AS3722_H
+#define _DEV_I2C_AS3722_H
+
+int    as3722_poweroff(device_t);
+
+#endif /* !_DEV_I2C_AS3722_H */
diff -r 69444fa6e6a5 -r c80c92189db3 sys/dev/i2c/files.i2c
--- a/sys/dev/i2c/files.i2c     Wed Nov 11 12:28:15 2015 +0000
+++ b/sys/dev/i2c/files.i2c     Wed Nov 11 12:35:22 2015 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: files.i2c,v 1.66 2015/10/21 09:03:13 jmcneill Exp $
+#      $NetBSD: files.i2c,v 1.67 2015/11/11 12:35:22 jmcneill Exp $
 
 obsolete defflag       opt_i2cbus.h            I2C_SCAN
 define i2cbus { }
@@ -250,3 +250,8 @@
 device titemp: sysmon_envsys
 attach titemp at iic
 file   dev/i2c/titemp.c                        titemp
+
+# AMS AS3722 Power Management IC
+device as3722pmic
+attach as3722pmic at iic
+file   dev/i2c/as3722.c                        as3722pmic      needs-flag