[PATCH 6/6] mailbox: arm_mhu: add name support to record mbox-name

[Sudeep Holla]

It's sometimes useful to identify the mailbox controller with the name
as specified in the devicetree via mbox-name property especially in a
system with multiple controllers.

This patch adds support to read and record the mailbox controller name.

Cc: Alexey Klimov <alexey.kli...@arm.com>
Cc: Jassi Brar <jaswinder.si...@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.ho...@arm.com>
---
 drivers/mailbox/arm_mhu.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/mailbox/arm_mhu.c b/drivers/mailbox/arm_mhu.c
index 0f5ab2204649..9aa623a3aa9a 100644
--- a/drivers/mailbox/arm_mhu.c
+++ b/drivers/mailbox/arm_mhu.c
@@ -47,6 +47,7 @@ struct arm_mhu {
        struct mhu_link mlink[MHU_NUM_PCHANS];
        struct mbox_controller mbox;
        struct device *dev;
+       const char *name;
 };
 
 /**
@@ -257,8 +258,8 @@ static struct mbox_chan *mhu_mbox_xlate(struct 
mbox_controller *mbox,
 
        chan->con_priv = chan_info;
 
-       dev_dbg(mbox->dev, "mbox: created channel - physical: %d sub: %d\n",
-               pchan, subchan);
+       dev_dbg(mbox->dev, "mbox: %s, created channel - physical: %d sub: %d\n",
+               mhu->name, pchan, subchan);
 
        return chan;
 }
@@ -361,6 +362,7 @@ static int mhu_probe(struct amba_device *adev, const struct 
amba_id *id)
        struct mhu_mbox_pdata *pdata;
        const struct of_device_id *match;
        struct device *dev = &adev->dev;
+       struct device_node *np = dev->of_node;
        int mhu_reg[MHU_NUM_PCHANS] = {
                MHU_LP_OFFSET, MHU_HP_OFFSET, MHU_SEC_OFFSET,
        };
@@ -390,6 +392,10 @@ static int mhu_probe(struct amba_device *adev, const 
struct amba_id *id)
                return PTR_ERR(mhu->base);
        }
 
+       err = of_property_read_string(np, "mbox-name", &mhu->name);
+       if (err)
+               mhu->name = np->full_name;
+
        chans = devm_kcalloc(dev, max_chans, sizeof(*chans), GFP_KERNEL);
        if (!chans)
                return -ENOMEM;
@@ -441,7 +447,7 @@ static int mhu_probe(struct amba_device *adev, const struct 
amba_id *id)
                }
        }
 
-       dev_info(dev, "ARM MHU Mailbox registered\n");
+       dev_info(dev, "%s mailbox registered\n", mhu->name);
        return 0;
 }
 
-- 
2.7.4