linux-kernel - [PATCH v2 3/6] dmaengine: ti: deprecate '#dma-channels'

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Message-Id: <20220427161126.647073-4-krzysztof.kozlowski@linaro.org>
Date:   Wed, 27 Apr 2022 18:11:23 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Benoît Cousson <bcousson@...libre.com>,
        Tony Lindgren <tony@...mide.com>, Sekhar Nori <nsekhar@...com>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Vinod Koul <vkoul@...nel.org>, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        dmaengine@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH v2 3/6] dmaengine: ti: deprecate '#dma-channels'

The generic property, used in most of the drivers and defined in generic
dma-common DT bindings, is 'dma-channels'.  Switch to new property while
keeping backward compatibility.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 drivers/dma/ti/cppi41.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/ti/cppi41.c b/drivers/dma/ti/cppi41.c
index 062bd9bd4de0..695915dba707 100644
--- a/drivers/dma/ti/cppi41.c
+++ b/drivers/dma/ti/cppi41.c
@@ -1105,8 +1105,12 @@ static int cppi41_dma_probe(struct platform_device *pdev)
 	cdd->qmgr_num_pend = glue_info->qmgr_num_pend;
 	cdd->first_completion_queue = glue_info->first_completion_queue;
 
+	/* Parse new and deprecated dma-channels properties */
 	ret = of_property_read_u32(dev->of_node,
-				   "#dma-channels", &cdd->n_chans);
+				   "dma-channels", &cdd->n_chans);
+	if (ret)
+		ret = of_property_read_u32(dev->of_node,
+					   "#dma-channels", &cdd->n_chans);
 	if (ret)
 		goto err_get_n_chans;
 
-- 
2.32.0