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Date: Fri, 11 Dec 2015 13:25:52 -0600 From: Lijun Pan <Lijun.Pan@...escale.com> To: <gregkh@...uxfoundation.org>, <arnd@...db.de>, <devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org> CC: <stuart.yoder@...escale.com>, <itai.katz@...escale.com>, <german.rivera@...escale.com>, <leoli@...escale.com>, <scottwood@...escale.com>, <agraf@...e.de>, <bhamciu1@...escale.com>, <R89243@...escale.com>, <bhupesh.sharma@...escale.com>, <nir.erez@...escale.com>, <richard.schmitt@...escale.com>, <dan.carpenter@...cle.com>, <Lijun.Pan2000@...il.com>, Lijun Pan <Lijun.Pan@...escale.com> Subject: [PATCH RESEND v2 6/8] staging: fsl-mc: bus rescan attribute to sync kernel with MC Introduce the rescan attribute as a bus attribute to synchronize the fsl-mc bus objects and the MC firmware. To rescan the fsl-mc bus, e.g., echo 1 > /sys/bus/fsl-mc/rescan Signed-off-by: Lijun Pan <Lijun.Pan@...escale.com> --- drivers/staging/fsl-mc/bus/mc-bus.c | 46 +++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/drivers/staging/fsl-mc/bus/mc-bus.c b/drivers/staging/fsl-mc/bus/mc-bus.c index 61d44fd..f9ee5fe 100644 --- a/drivers/staging/fsl-mc/bus/mc-bus.c +++ b/drivers/staging/fsl-mc/bus/mc-bus.c @@ -142,11 +142,57 @@ static const struct attribute_group *fsl_mc_dev_groups[] = { NULL, }; +static int scan_fsl_mc_bus(struct device *dev, void *data) +{ + struct fsl_mc_device *root_mc_dev; + struct fsl_mc_bus *root_mc_bus; + + if (is_root_dprc(dev)) { + root_mc_dev = to_fsl_mc_device(dev); + root_mc_bus = to_fsl_mc_bus(root_mc_dev); + mutex_lock(&root_mc_bus->scan_mutex); + dprc_scan_objects(root_mc_dev); + mutex_unlock(&root_mc_bus->scan_mutex); + } + + return 0; +} + +static ssize_t bus_rescan_store(struct bus_type *bus, + const char *buf, size_t count) +{ + unsigned long val; + + if (kstrtoul(buf, 0, &val) < 0) + return -EINVAL; + + if (val) + bus_for_each_dev(bus, NULL, NULL, scan_fsl_mc_bus); + + return count; +} +static BUS_ATTR(rescan, (S_IWUSR | S_IWGRP), NULL, bus_rescan_store); + +static struct attribute *fsl_mc_bus_attrs[] = { + &bus_attr_rescan.attr, + NULL, +}; + +static const struct attribute_group fsl_mc_bus_group = { + .attrs = fsl_mc_bus_attrs, +}; + +static const struct attribute_group *fsl_mc_bus_groups[] = { + &fsl_mc_bus_group, + NULL, +}; + struct bus_type fsl_mc_bus_type = { .name = "fsl-mc", .match = fsl_mc_bus_match, .uevent = fsl_mc_bus_uevent, .dev_groups = fsl_mc_dev_groups, + .bus_groups = fsl_mc_bus_groups, }; EXPORT_SYMBOL_GPL(fsl_mc_bus_type); -- 2.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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