From: Olivier Dautricourt <olivier.dautricourt@orolia.com>
To: Rob Herring <robh+dt@kernel.org>, Vinod Koul <vkoul@kernel.org>,
Stefan Roese <sr@denx.de>
Cc: dmaengine@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] drivers: dma: altera-msgdma: add OF support
Date: Wed, 28 Apr 2021 14:45:26 +0200 [thread overview]
Message-ID: <YIlY5pPg1Zuxy56F@orolia.com> (raw)
This driver had no device tree support.
- add compatible field "altr,msgdma"
- define msgdma_of_xlate, with no argument
- register dma controller with of_dma_controller_register
Signed-off-by: Olivier Dautricourt <olivier.dautricourt@orolia.com>
---
drivers/dma/altera-msgdma.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/drivers/dma/altera-msgdma.c b/drivers/dma/altera-msgdma.c
index 9a841ce5f0c5..2b062d5aa636 100644
--- a/drivers/dma/altera-msgdma.c
+++ b/drivers/dma/altera-msgdma.c
@@ -19,6 +19,7 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
+#include <linux/of_dma.h>
#include "dmaengine.h"
@@ -784,6 +785,16 @@ static int request_and_map(struct platform_device *pdev, const char *name,
return 0;
}
+#ifdef CONFIG_OF
+static struct dma_chan *msgdma_of_xlate(struct of_phandle_args *dma_spec,
+ struct of_dma *ofdma)
+{
+ struct msgdma_device *d = ofdma->of_dma_data;
+
+ return dma_get_any_slave_channel(&d->dmadev);
+}
+#endif
+
/**
* msgdma_probe - Driver probe function
* @pdev: Pointer to the platform_device structure
@@ -888,6 +899,14 @@ static int msgdma_probe(struct platform_device *pdev)
if (ret)
goto fail;
+#ifdef CONFIG_OF
+ ret = of_dma_controller_register(pdev->dev.of_node, msgdma_of_xlate,
+ mdev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register dma controller");
+ goto fail;
+ }
+#endif
dev_notice(&pdev->dev, "Altera mSGDMA driver probe success\n");
return 0;
@@ -916,9 +935,19 @@ static int msgdma_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_OF
+static const struct of_device_id msgdma_match[] = {
+ { .compatible = "altr,msgdma",},
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, msgdma_match);
+#endif
+
static struct platform_driver msgdma_driver = {
.driver = {
.name = "altera-msgdma",
+ .of_match_table = of_match_ptr(msgdma_match),
},
.probe = msgdma_probe,
.remove = msgdma_remove,
--
2.31.0.rc2
reply other threads:[~2021-04-28 12:45 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YIlY5pPg1Zuxy56F@orolia.com \
--to=olivier.dautricourt@orolia.com \
--cc=devicetree@vger.kernel.org \
--cc=dmaengine@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=robh+dt@kernel.org \
--cc=sr@denx.de \
--cc=vkoul@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.