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Subject[PATCH v2 4/4] remoteproc/davinci: Add device tree support for OMAP-L138 DSP
Date
The Davinci remoteproc driver currently supports the DSP remoteproc
device created in legacy-style on OMAP-L13x SoCs. The driver has been
enhanced to support the DSP remoteproc device created through Device
Tree now. The current DT support handles the C674x DSP processor
subsystem on OMAP-L138 SoCs.

Signed-off-by: Suman Anna <s-anna@ti.com>
---
v2:
- Add __maybe_unused and of_match_ptr to deal with non-OF builds
- Rebased patch after dropping the interrupt management patch from
the cleanup series, https://patchwork.kernel.org/patch/9735321/
v1: https://patchwork.kernel.org/patch/9751277/

drivers/remoteproc/da8xx_remoteproc.c | 30 +++++++++++++++++++++++++++---
1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/drivers/remoteproc/da8xx_remoteproc.c b/drivers/remoteproc/da8xx_remoteproc.c
index c1cff78de67b..bf3b9034c319 100644
--- a/drivers/remoteproc/da8xx_remoteproc.c
+++ b/drivers/remoteproc/da8xx_remoteproc.c
@@ -16,6 +16,7 @@
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
#include <linux/remoteproc.h>

@@ -261,10 +262,21 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
return PTR_ERR(dsp_clk);
}

+ if (dev->of_node) {
+ ret = of_reserved_mem_device_init(dev);
+ if (ret) {
+ dev_err(dev, "device does not have specific CMA pool: %d\n",
+ ret);
+ return ret;
+ }
+ }
+
rproc = rproc_alloc(dev, "dsp", &da8xx_rproc_ops, da8xx_fw_name,
sizeof(*drproc));
- if (!rproc)
- return -ENOMEM;
+ if (!rproc) {
+ ret = -ENOMEM;
+ goto free_mem;
+ }

drproc = rproc->priv;
drproc->rproc = rproc;
@@ -311,7 +323,9 @@ static int da8xx_rproc_probe(struct platform_device *pdev)

free_rproc:
rproc_free(rproc);
-
+free_mem:
+ if (dev->of_node)
+ of_reserved_mem_device_release(dev);
return ret;
}

@@ -319,6 +333,7 @@ static int da8xx_rproc_remove(struct platform_device *pdev)
{
struct rproc *rproc = platform_get_drvdata(pdev);
struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
+ struct device *dev = &pdev->dev;

/*
* The devm subsystem might end up releasing things before
@@ -329,15 +344,24 @@ static int da8xx_rproc_remove(struct platform_device *pdev)

rproc_del(rproc);
rproc_free(rproc);
+ if (dev->of_node)
+ of_reserved_mem_device_release(dev);

return 0;
}

+static const struct of_device_id davinci_rproc_of_match[] __maybe_unused = {
+ { .compatible = "ti,da850-dsp", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, davinci_rproc_of_match);
+
static struct platform_driver da8xx_rproc_driver = {
.probe = da8xx_rproc_probe,
.remove = da8xx_rproc_remove,
.driver = {
.name = "davinci-rproc",
+ .of_match_table = of_match_ptr(davinci_rproc_of_match),
},
};

--
2.13.1
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