[src/trunk]: src/sys Add facility for fdt devices to register reset and power...

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

details:   https://anonhg.NetBSD.org/src/rev/3cbbc42dc5ac
branches:  trunk
changeset: 824222:3cbbc42dc5ac
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sun May 28 15:55:11 2017 +0000

description:
Add facility for fdt devices to register reset and poweroff handlers.
Use this to remove as3722-specific code in tegra_machdep.c

diffstat:

 sys/arch/evbarm/tegra/tegra_machdep.c |  31 +----------
 sys/dev/fdt/fdt_power.c               |  86 +++++++++++++++++++++++++++++++++++
 sys/dev/fdt/fdtvar.h                  |  14 +++++-
 sys/dev/fdt/files.fdt                 |   3 +-
 sys/dev/i2c/as3722.c                  |  29 ++++++++++-
 5 files changed, 132 insertions(+), 31 deletions(-)

diffs (283 lines):

diff -r 15a42c7d46ee -r 3cbbc42dc5ac sys/arch/evbarm/tegra/tegra_machdep.c
--- a/sys/arch/evbarm/tegra/tegra_machdep.c     Sun May 28 14:53:13 2017 +0000
+++ b/sys/arch/evbarm/tegra/tegra_machdep.c     Sun May 28 15:55:11 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: tegra_machdep.c,v 1.44 2017/05/28 00:40:21 jmcneill Exp $ */
+/* $NetBSD: tegra_machdep.c,v 1.45 2017/05/28 15:55:11 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tegra_machdep.c,v 1.44 2017/05/28 00:40:21 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tegra_machdep.c,v 1.45 2017/05/28 15:55:11 jmcneill Exp $");
 
 #include "opt_tegra.h"
 #include "opt_machdep.h"
@@ -40,7 +40,6 @@
 #include "ukbd.h"
 #include "genfb.h"
 #include "ether.h"
-#include "as3722pmic.h"
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -89,10 +88,6 @@
 #include <dev/usb/ukbdvar.h>
 #include <net/if_ether.h>
 
-#if NAS3722PMIC > 0
-#include <dev/i2c/as3722.h>
-#endif
-
 #ifndef TEGRA_MAX_BOOT_STRING
 #define TEGRA_MAX_BOOT_STRING 1024
 #endif
@@ -503,30 +498,12 @@
 static void
 tegra_reset(void)
 {
-#if NAS3722PMIC > 0
-       device_t pmic = device_find_by_driver_unit("as3722pmic", 0);
-       if (pmic != NULL) {
-               delay(1000000);
-               if (as3722_reboot(pmic) != 0) {
-                       printf("WARNING: AS3722 reset failed\n");
-                       return;
-               }
-       }
-#endif
+       fdtbus_power_reset();
        tegra_pmc_reset();
 }
 
 static void
 tegra_powerdown(void)
 {
-#if NAS3722PMIC > 0
-       device_t pmic = device_find_by_driver_unit("as3722pmic", 0);
-       if (pmic != NULL) {
-               delay(1000000);
-               if (as3722_poweroff(pmic) != 0) {
-                       printf("WARNING: AS3722 poweroff failed\n");
-                       return;
-               }
-       }
-#endif
+       fdtbus_power_poweroff();
 }
diff -r 15a42c7d46ee -r 3cbbc42dc5ac sys/dev/fdt/fdt_power.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/fdt/fdt_power.c   Sun May 28 15:55:11 2017 +0000
@@ -0,0 +1,86 @@
+/* $NetBSD: fdt_power.c,v 1.1 2017/05/28 15:55:11 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2017 Jared 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 AUTHOR ``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 AUTHOR 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: fdt_power.c,v 1.1 2017/05/28 15:55:11 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/kmem.h>
+
+#include <libfdt.h>
+#include <dev/fdt/fdtvar.h>
+
+struct fdtbus_power_controller {
+       device_t power_dev;
+       int power_phandle;
+       const struct fdtbus_power_controller_func *power_funcs;
+
+       struct fdtbus_power_controller *power_next;
+};
+
+static struct fdtbus_power_controller *fdtbus_power = NULL;
+
+int
+fdtbus_register_power_controller(device_t dev, int phandle,
+    const struct fdtbus_power_controller_func *funcs)
+{
+       struct fdtbus_power_controller *power;
+
+       power = kmem_alloc(sizeof(*power), KM_SLEEP);
+       power->power_dev = dev;
+       power->power_phandle = phandle;
+       power->power_funcs = funcs;
+
+       power->power_next = fdtbus_power;
+       fdtbus_power = power;
+
+       return 0;
+}
+
+void
+fdtbus_power_reset(void)
+{
+       struct fdtbus_power_controller *power;
+
+       for (power = fdtbus_power; power; power = power->power_next) {
+               if (power->power_funcs->reset)
+                       power->power_funcs->reset(power->power_dev);
+       }
+}
+
+void
+fdtbus_power_poweroff(void)
+{
+       struct fdtbus_power_controller *power;
+
+       for (power = fdtbus_power; power; power = power->power_next) {
+               if (power->power_funcs->poweroff)
+                       power->power_funcs->poweroff(power->power_dev);
+       }
+}
diff -r 15a42c7d46ee -r 3cbbc42dc5ac sys/dev/fdt/fdtvar.h
--- a/sys/dev/fdt/fdtvar.h      Sun May 28 14:53:13 2017 +0000
+++ b/sys/dev/fdt/fdtvar.h      Sun May 28 15:55:11 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: fdtvar.h,v 1.17 2017/05/26 18:56:27 jmcneill Exp $ */
+/* $NetBSD: fdtvar.h,v 1.18 2017/05/28 15:55:11 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -164,6 +164,13 @@
        void    (*halt)(device_t, void *);
 };
 
+struct fdtbus_power_controller;
+
+struct fdtbus_power_controller_func {
+       void    (*reset)(device_t);
+       void    (*poweroff)(device_t);
+};
+
 int            fdtbus_register_interrupt_controller(device_t, int,
                    const struct fdtbus_interrupt_controller_func *);
 int            fdtbus_register_i2c_controller(device_t, int,
@@ -180,6 +187,8 @@
                    const struct fdtbus_reset_controller_func *);
 int            fdtbus_register_dma_controller(device_t, int,
                    const struct fdtbus_dma_controller_func *);
+int            fdtbus_register_power_controller(device_t, int,
+                   const struct fdtbus_power_controller_func *);
 
 int            fdtbus_get_reg(int, u_int, bus_addr_t *, bus_size_t *);
 int            fdtbus_get_reg64(int, u_int, uint64_t *, uint64_t *);
@@ -226,6 +235,9 @@
 
 int            fdtbus_todr_attach(device_t, int, todr_chip_handle_t);
 
+void           fdtbus_power_reset(void);
+void           fdtbus_power_poweroff(void);
+
 bool           fdtbus_set_data(const void *);
 const void *   fdtbus_get_data(void);
 int            fdtbus_phandle2offset(int);
diff -r 15a42c7d46ee -r 3cbbc42dc5ac sys/dev/fdt/files.fdt
--- a/sys/dev/fdt/files.fdt     Sun May 28 14:53:13 2017 +0000
+++ b/sys/dev/fdt/files.fdt     Sun May 28 15:55:11 2017 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.fdt,v 1.13 2017/05/28 00:38:40 jmcneill Exp $
+# $NetBSD: files.fdt,v 1.14 2017/05/28 15:55:11 jmcneill Exp $
 
 include        "external/bsd/libfdt/conf/files.libfdt"
 
@@ -29,6 +29,7 @@
 file   dev/fdt/fdt_gpio.c                      fdtbus
 file   dev/fdt/fdt_i2c.c                       fdtbus
 file   dev/fdt/fdt_intr.c                      fdtbus
+file   dev/fdt/fdt_power.c                     fdtbus
 file   dev/fdt/fdt_regulator.c                 fdtbus
 file   dev/fdt/fdt_reset.c                     fdtbus
 file   dev/fdt/fdt_rtc.c                       fdtbus
diff -r 15a42c7d46ee -r 3cbbc42dc5ac sys/dev/i2c/as3722.c
--- a/sys/dev/i2c/as3722.c      Sun May 28 14:53:13 2017 +0000
+++ b/sys/dev/i2c/as3722.c      Sun May 28 15:55:11 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: as3722.c,v 1.11 2017/04/29 20:43:48 jakllsch Exp $ */
+/* $NetBSD: as3722.c,v 1.12 2017/05/28 15:55:11 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -29,7 +29,7 @@
 #include "opt_fdt.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: as3722.c,v 1.11 2017/04/29 20:43:48 jakllsch Exp $");
+__KERNEL_RCSID(0, "$NetBSD: as3722.c,v 1.12 2017/05/28 15:55:11 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -197,6 +197,14 @@
        .set_voltage = as3722reg_set_voltage,
        .get_voltage = as3722reg_get_voltage,
 };
+
+static void    as3722_power_reset(device_t);
+static void    as3722_power_poweroff(device_t);
+
+static struct fdtbus_power_controller_func as3722power_funcs = {
+       .reset = as3722_power_reset,
+       .poweroff = as3722_power_poweroff,
+};
 #endif
 
 static int     as3722_read(struct as3722_softc *, uint8_t, uint8_t *, int);
@@ -258,6 +266,9 @@
        as3722_rtc_attach(sc);
 #ifdef FDT
        as3722_regulator_attach(sc);
+
+       fdtbus_register_power_controller(self, sc->sc_phandle,
+           &as3722power_funcs);
 #endif
 }
 
@@ -813,6 +824,20 @@
 
        return regdef->get(dev, puvol);
 }
+
+static void
+as3722_power_reset(device_t dev)
+{
+       delay(1000000);
+       as3722_reboot(dev);
+}
+
+static void
+as3722_power_poweroff(device_t dev)
+{
+       delay(1000000);
+       as3722_poweroff(dev);
+}
 #endif
 
 int