[PATCH 4/4] remoteproc/davinci: Add device tree support for OMAP-L138 DSP

[Suman Anna]

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-a...@ti.com>
---
 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 5250cc494775..02a4920d1af2 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>
 
@@ -272,10 +273,21 @@ 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;
@@ -313,25 +325,37 @@ 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;
 }
 
 static int da8xx_rproc_remove(struct platform_device *pdev)
 {
        struct rproc *rproc = platform_get_drvdata(pdev);
+       struct device *dev = &pdev->dev;
 
        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[] = {
+       { .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 = davinci_rproc_of_match,
        },
 };
 
-- 
2.12.0