From: Adam Ford <aford173@gmail.com>
To: linux-renesas-soc@vger.kernel.org
Cc: aford@beaconembedded.com, charles.stevens@logicpd.com,
Adam Ford <aford173@gmail.com>,
Sergei Shtylyov <sergei.shtylyov@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [RFC] ravb: Add support for optional txc_refclk
Date: Sat, 12 Dec 2020 10:56:48 -0600 [thread overview]
Message-ID: <20201212165648.166220-1-aford173@gmail.com> (raw)
The SoC expects the txv_refclk is provided, but if it is provided
by a programmable clock, there needs to be a way to get and enable
this clock to operate. It needs to be optional since it's only
necessary for those with programmable clocks.
Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 7453b17a37a2..ddf3bc5164d2 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -994,6 +994,7 @@ struct ravb_private {
struct platform_device *pdev;
void __iomem *addr;
struct clk *clk;
+ struct clk *ref_clk;
struct mdiobb_ctrl mdiobb;
u32 num_rx_ring[NUM_RX_QUEUE];
u32 num_tx_ring[NUM_TX_QUEUE];
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index bd30505fbc57..4c3f95923ef2 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -2148,6 +2148,18 @@ static int ravb_probe(struct platform_device *pdev)
goto out_release;
}
+ priv->ref_clk = devm_clk_get(&pdev->dev, "txc_refclk");
+ if (IS_ERR(priv->ref_clk)) {
+ if (PTR_ERR(priv->ref_clk) == -EPROBE_DEFER) {
+ /* for Probe defer return error */
+ error = PTR_ERR(priv->ref_clk);
+ goto out_release;
+ }
+ /* Ignore other errors since it's optional */
+ } else {
+ (void)clk_prepare_enable(priv->ref_clk);
+ }
+
ndev->max_mtu = 2048 - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
ndev->min_mtu = ETH_MIN_MTU;
--
2.25.1
next reply other threads:[~2020-12-12 16:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-12 16:56 Adam Ford [this message]
2020-12-12 17:54 ` [RFC] ravb: Add support for optional txc_refclk Sergei Shtylyov
2020-12-12 19:38 ` Adam Ford
2020-12-14 10:05 ` Geert Uytterhoeven
2020-12-28 13:49 ` Adam Ford
2020-12-28 16:17 ` Geert Uytterhoeven
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