[RFC 1/3] net: freescale: fec: add support for optional enet_out clk
Wolfram Sang
w.sang at pengutronix.de
Tue Jan 29 09:46:11 EST 2013
Some MX28 boards need the internal enet_out clock to be enabled. So, do
this in the driver iff the clock was referenced via devicetree.
Signed-off-by: Wolfram Sang <w.sang at pengutronix.de>
---
davidm: Please don't apply before Shawn as the mxs-maintainer has given his ack
on the general procedure. Or maybe he can merge it via his tree?
drivers/net/ethernet/freescale/fec.c | 10 ++++++++++
drivers/net/ethernet/freescale/fec.h | 1 +
2 files changed, 11 insertions(+)
diff --git a/drivers/net/ethernet/freescale/fec.c b/drivers/net/ethernet/freescale/fec.c
index 0704bca..6573bd5 100644
--- a/drivers/net/ethernet/freescale/fec.c
+++ b/drivers/net/ethernet/freescale/fec.c
@@ -1628,6 +1628,11 @@ fec_probe(struct platform_device *pdev)
goto failed_clk;
}
+ /* enet_out is optional, depends on board */
+ fep->clk_enet_out = devm_clk_get(&pdev->dev, "enet_out");
+ if (IS_ERR(fep->clk_enet_out))
+ fep->clk_enet_out = NULL;
+
#ifdef CONFIG_FEC_PTP
fep->clk_ptp = devm_clk_get(&pdev->dev, "ptp");
if (IS_ERR(fep->clk_ptp)) {
@@ -1638,6 +1643,7 @@ fec_probe(struct platform_device *pdev)
clk_prepare_enable(fep->clk_ahb);
clk_prepare_enable(fep->clk_ipg);
+ clk_prepare_enable(fep->clk_enet_out);
#ifdef CONFIG_FEC_PTP
clk_prepare_enable(fep->clk_ptp);
#endif
@@ -1679,6 +1685,7 @@ failed_register:
failed_mii_init:
failed_init:
failed_regulator:
+ clk_disable_unprepare(fep->clk_enet_out);
clk_disable_unprepare(fep->clk_ahb);
clk_disable_unprepare(fep->clk_ipg);
#ifdef CONFIG_FEC_PTP
@@ -1722,6 +1729,7 @@ fec_drv_remove(struct platform_device *pdev)
if (fep->ptp_clock)
ptp_clock_unregister(fep->ptp_clock);
#endif
+ clk_disable_unprepare(fep->clk_enet_out);
clk_disable_unprepare(fep->clk_ahb);
clk_disable_unprepare(fep->clk_ipg);
iounmap(fep->hwp);
@@ -1747,6 +1755,7 @@ fec_suspend(struct device *dev)
fec_stop(ndev);
netif_device_detach(ndev);
}
+ clk_disable_unprepare(fep->clk_enet_out);
clk_disable_unprepare(fep->clk_ahb);
clk_disable_unprepare(fep->clk_ipg);
@@ -1759,6 +1768,7 @@ fec_resume(struct device *dev)
struct net_device *ndev = dev_get_drvdata(dev);
struct fec_enet_private *fep = netdev_priv(ndev);
+ clk_prepare_enable(fep->clk_enet_out);
clk_prepare_enable(fep->clk_ahb);
clk_prepare_enable(fep->clk_ipg);
if (netif_running(ndev)) {
diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index c5a3bc1..0648dbe 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -203,6 +203,7 @@ struct fec_enet_private {
struct clk *clk_ipg;
struct clk *clk_ahb;
+ struct clk *clk_enet_out;
#ifdef CONFIG_FEC_PTP
struct clk *clk_ptp;
#endif
--
1.7.10.4
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