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60 lines
1.6 KiB
Diff
60 lines
1.6 KiB
Diff
From 75b607ff8725eac74f3375b3370f7d121d1827a3 Mon Sep 17 00:00:00 2001
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From: Lijun Pan <Lijun.Pan@freescale.com>
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Date: Mon, 8 Feb 2016 17:40:14 -0600
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Subject: [PATCH 190/226] staging: fsl-mc: root dprc rescan attribute to sync
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kernel with MC
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Introduce the rescan attribute as a device attribute to
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synchronize the fsl-mc bus objects and the MC firmware.
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To rescan the root dprc only, e.g.
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echo 1 > /sys/bus/fsl-mc/devices/dprc.1/rescan
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Signed-off-by: Lijun Pan <Lijun.Pan@freescale.com>
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[Stuart: resolved merge conflict]
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Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
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---
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drivers/staging/fsl-mc/bus/mc-bus.c | 29 +++++++++++++++++++++++++++++
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1 file changed, 29 insertions(+)
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--- a/drivers/staging/fsl-mc/bus/mc-bus.c
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+++ b/drivers/staging/fsl-mc/bus/mc-bus.c
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@@ -96,8 +96,37 @@ static ssize_t modalias_show(struct devi
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}
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static DEVICE_ATTR_RO(modalias);
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+static ssize_t rescan_store(struct device *dev,
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+ struct device_attribute *attr,
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+ const char *buf, size_t count)
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+{
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+ unsigned long val;
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+ unsigned int irq_count;
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+ struct fsl_mc_device *root_mc_dev;
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+ struct fsl_mc_bus *root_mc_bus;
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+
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+ if (!fsl_mc_is_root_dprc(dev))
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+ return -EINVAL;
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+
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+ root_mc_dev = to_fsl_mc_device(dev);
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+ root_mc_bus = to_fsl_mc_bus(root_mc_dev);
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+
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+ if (kstrtoul(buf, 0, &val) < 0)
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+ return -EINVAL;
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+
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+ if (val) {
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+ mutex_lock(&root_mc_bus->scan_mutex);
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+ dprc_scan_objects(root_mc_dev, &irq_count);
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+ mutex_unlock(&root_mc_bus->scan_mutex);
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+ }
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+
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+ return count;
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+}
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+static DEVICE_ATTR_WO(rescan);
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+
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static struct attribute *fsl_mc_dev_attrs[] = {
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&dev_attr_modalias.attr,
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+ &dev_attr_rescan.attr,
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NULL,
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};
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