arch-flo-junk/packages/linux-asus-flo/11_Configure_dma_operations_at_probe_time.patch

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author Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> 2015-05-15 02:00:07 +0300
committer John Stultz <john.stultz@linaro.org> 2017-05-12 12:39:37 -0700
commit 4d4d7186492648fe2517178b983fcd5a55e3d575 (patch)
tree fea85da4e2e33bac4712d8c0ab66a0d0624920f8
parent b3c0228dd8468ab9a9da3b70b2a011ffb855091b (diff)
download flo-4d4d7186492648fe2517178b983fcd5a55e3d575.tar.gz
drivers: platform: Configure dma operations at probe time
Configuring DMA ops at probe time will allow deferring device probe when
the IOMMU isn't available yet.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Diffstat
-rw-r--r-- drivers/base/platform.c 9
-rw-r--r-- drivers/of/platform.c 7
2 files changed, 12 insertions, 4 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index c245683..1526298 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -572,6 +572,10 @@ static int platform_drv_probe(struct device *_dev)
if (ret < 0)
return ret;
+ ret = of_dma_configure_ops(_dev, _dev->of_node);
+ if (ret < 0)
+ goto done;
+
ret = dev_pm_domain_attach(_dev, true);
if (ret != -EPROBE_DEFER) {
if (drv->probe) {
@@ -584,6 +588,10 @@ static int platform_drv_probe(struct device *_dev)
}
}
+ if (ret)
+ of_dma_deconfigure(_dev);
+
+done:
if (drv->prevent_deferred_probe && ret == -EPROBE_DEFER) {
dev_warn(_dev, "probe deferral not supported\n");
ret = -ENXIO;
@@ -606,6 +614,7 @@ static int platform_drv_remove(struct device *_dev)
if (drv->remove)
ret = drv->remove(dev);
dev_pm_domain_detach(_dev, true);
+ of_dma_deconfigure(_dev);
return ret;
}
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index a2d27bc..967f6ce 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -187,11 +187,9 @@ static struct platform_device *of_platform_device_create_pdata(
dev->dev.bus = &platform_bus_type;
dev->dev.platform_data = platform_data;
of_dma_configure_masks(&dev->dev, dev->dev.of_node);
- of_dma_configure_ops(&dev->dev, dev->dev.of_node);
of_msi_configure(&dev->dev, dev->dev.of_node);
if (of_device_add(dev) != 0) {
- of_dma_deconfigure(&dev->dev);
platform_device_put(dev);
goto err_clear_flag;
}
@@ -540,11 +538,12 @@ static int of_platform_device_destroy(struct device *dev, void *data)
if (dev->bus == &platform_bus_type)
platform_device_unregister(to_platform_device(dev));
#ifdef CONFIG_ARM_AMBA
- else if (dev->bus == &amba_bustype)
+ else if (dev->bus == &amba_bustype) {
amba_device_unregister(to_amba_device(dev));
+ of_dma_deconfigure(dev);
+ }
#endif
- of_dma_deconfigure(dev);
of_node_clear_flag(dev->of_node, OF_POPULATED);
of_node_clear_flag(dev->of_node, OF_POPULATED_BUS);
return 0;