bus: fsl-mc: add autorescan sysfs
Add the autorescan sysfs in order to enable/disable the DPRC IRQs on which automatic rescan of the bus is performed. This is important when dynamic creation of objects is needed to happen in a timely manner because object creation can be bundled together. Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>5.4-rM2-2.2.x-imx-squashed
parent
9329f333eb
commit
04b23c7617
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@ -484,8 +484,9 @@ out:
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/*
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* Disable and clear interrupt for a given DPRC object
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*/
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static int disable_dprc_irq(struct fsl_mc_device *mc_dev)
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int disable_dprc_irq(struct fsl_mc_device *mc_dev)
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{
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struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
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int error;
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struct fsl_mc_io *mc_io = mc_dev->mc_io;
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@ -522,9 +523,18 @@ static int disable_dprc_irq(struct fsl_mc_device *mc_dev)
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return error;
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}
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mc_bus->irq_enabled = 0;
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return 0;
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}
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int get_dprc_irq_state(struct fsl_mc_device *mc_dev)
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{
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struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
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return mc_bus->irq_enabled;
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}
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static int register_dprc_irq_handler(struct fsl_mc_device *mc_dev)
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{
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int error;
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@ -551,8 +561,9 @@ static int register_dprc_irq_handler(struct fsl_mc_device *mc_dev)
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return 0;
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}
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static int enable_dprc_irq(struct fsl_mc_device *mc_dev)
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int enable_dprc_irq(struct fsl_mc_device *mc_dev)
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{
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struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
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int error;
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/*
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@ -580,6 +591,8 @@ static int enable_dprc_irq(struct fsl_mc_device *mc_dev)
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return error;
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}
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mc_bus->irq_enabled = 1;
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return 0;
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}
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@ -237,8 +237,63 @@ static ssize_t rescan_store(struct bus_type *bus,
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}
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static BUS_ATTR_WO(rescan);
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static int fsl_mc_bus_set_autorescan(struct device *dev, void *data)
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{
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struct fsl_mc_device *root_mc_dev;
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unsigned long val;
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char *buf = data;
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if (!fsl_mc_is_root_dprc(dev))
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goto exit;
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root_mc_dev = to_fsl_mc_device(dev);
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if (kstrtoul(buf, 0, &val) < 0)
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return -EINVAL;
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if (val)
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enable_dprc_irq(root_mc_dev);
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else
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disable_dprc_irq(root_mc_dev);
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exit:
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return 0;
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}
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static int fsl_mc_bus_get_autorescan(struct device *dev, void *data)
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{
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struct fsl_mc_device *root_mc_dev;
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char *buf = data;
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if (!fsl_mc_is_root_dprc(dev))
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goto exit;
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root_mc_dev = to_fsl_mc_device(dev);
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sprintf(buf, "%d\n", get_dprc_irq_state(root_mc_dev));
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exit:
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return 0;
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}
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static ssize_t autorescan_store(struct bus_type *bus,
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const char *buf, size_t count)
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{
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bus_for_each_dev(bus, NULL, (void *)buf, fsl_mc_bus_set_autorescan);
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return count;
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}
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static ssize_t autorescan_show(struct bus_type *bus, char *buf)
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{
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bus_for_each_dev(bus, NULL, (void *)buf, fsl_mc_bus_get_autorescan);
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return strlen(buf);
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}
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static BUS_ATTR_RW(autorescan);
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static struct attribute *fsl_mc_bus_attrs[] = {
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&bus_attr_rescan.attr,
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&bus_attr_autorescan.attr,
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NULL,
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};
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@ -203,4 +203,8 @@ static inline void fsl_mc_uapi_remove_device_file(struct fsl_mc_bus *mc_bus)
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#endif
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int disable_dprc_irq(struct fsl_mc_device *mc_dev);
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int enable_dprc_irq(struct fsl_mc_device *mc_dev);
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int get_dprc_irq_state(struct fsl_mc_device *mc_dev);
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#endif /* _FSL_MC_PRIVATE_H_ */
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@ -1006,6 +1006,7 @@ struct fsl_mc_bus {
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struct mutex scan_mutex; /* serializes bus scanning */
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struct dprc_attributes dprc_attr;
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struct fsl_mc_uapi uapi_misc;
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int irq_enabled;
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};
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int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev,
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