linux-kernel - [PATCH v6 4/4] net: stmmac: add a parse for new property 'snps,clk-csr'

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Message-ID: <20220928091052.18490-5-jianguo.zhang@mediatek.com>
Date:   Wed, 28 Sep 2022 17:10:52 +0800
From:   Jianguo Zhang <jianguo.zhang@...iatek.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
CC:     Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        "Matthias Brugger" <matthias.bgg@...il.com>,
        Biao Huang <biao.huang@...iatek.com>, <netdev@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        Jianguo Zhang <jianguo.zhang@...iatek.com>
Subject: [PATCH v6 4/4] net: stmmac: add a parse for new property 'snps,clk-csr'

Parse new property 'snps,clk-csr' firstly because the new property
is documented in binding file, if failed, fall back to old property
'clk_csr' for out-of-tree case

Signed-off-by: Jianguo Zhang <jianguo.zhang@...iatek.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 9f5cac4000da..4c60a89460c8 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -444,7 +444,9 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
 	 * or get clk_csr from device tree.
 	 */
 	plat->clk_csr = -1;
-	of_property_read_u32(np, "clk_csr", &plat->clk_csr);
+	if (of_property_read_u32(np, "snps,clk-csr", &plat->clk_csr))
+		of_property_read_u32(np, "clk_csr", &plat->clk_csr);
+
 
 	/* "snps,phy-addr" is not a standard property. Mark it as deprecated
 	 * and warn of its use. Remove this when phy node support is added.
-- 
2.25.1