* [PATCH 1/6] bcm63xx_enet: correct clock usage
2017-10-01 11:02 [PATCH 0/6] bcm63xx_enet: small fixes and cleanups Jonas Gorski
@ 2017-10-01 11:02 ` Jonas Gorski
2017-10-01 11:02 ` [PATCH 2/6] bcm63xx_enet: do not write to random DMA channel on BCM6345 Jonas Gorski
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Jonas Gorski @ 2017-10-01 11:02 UTC (permalink / raw)
To: linux-arm-kernel
Check the return code of prepare_enable and change one last instance of
enable only to prepare_enable. Also properly disable and release the
clock in error paths and on remove for enetsw.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
---
drivers/net/ethernet/broadcom/bcm63xx_enet.c | 31 +++++++++++++++++++++-------
1 file changed, 23 insertions(+), 8 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index c6221f04a748..a45ec97b5b1e 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -1773,7 +1773,9 @@ static int bcm_enet_probe(struct platform_device *pdev)
ret = PTR_ERR(priv->mac_clk);
goto out;
}
- clk_prepare_enable(priv->mac_clk);
+ ret = clk_prepare_enable(priv->mac_clk);
+ if (ret)
+ goto out_put_clk_mac;
/* initialize default and fetch platform data */
priv->rx_ring_size = BCMENET_DEF_RX_DESC;
@@ -1805,9 +1807,11 @@ static int bcm_enet_probe(struct platform_device *pdev)
if (IS_ERR(priv->phy_clk)) {
ret = PTR_ERR(priv->phy_clk);
priv->phy_clk = NULL;
- goto out_put_clk_mac;
+ goto out_disable_clk_mac;
}
- clk_prepare_enable(priv->phy_clk);
+ ret = clk_prepare_enable(priv->phy_clk);
+ if (ret)
+ goto out_put_clk_phy;
}
/* do minimal hardware init to be able to probe mii bus */
@@ -1900,13 +1904,16 @@ static int bcm_enet_probe(struct platform_device *pdev)
out_uninit_hw:
/* turn off mdc clock */
enet_writel(priv, 0, ENET_MIISC_REG);
- if (priv->phy_clk) {
+ if (priv->phy_clk)
clk_disable_unprepare(priv->phy_clk);
+
+out_put_clk_phy:
+ if (priv->phy_clk)
clk_put(priv->phy_clk);
- }
-out_put_clk_mac:
+out_disable_clk_mac:
clk_disable_unprepare(priv->mac_clk);
+out_put_clk_mac:
clk_put(priv->mac_clk);
out:
free_netdev(dev);
@@ -2748,7 +2755,9 @@ static int bcm_enetsw_probe(struct platform_device *pdev)
ret = PTR_ERR(priv->mac_clk);
goto out_unmap;
}
- clk_enable(priv->mac_clk);
+ ret = clk_prepare_enable(priv->mac_clk);
+ if (ret)
+ goto out_put_clk;
priv->rx_chan = 0;
priv->tx_chan = 1;
@@ -2769,7 +2778,7 @@ static int bcm_enetsw_probe(struct platform_device *pdev)
ret = register_netdev(dev);
if (ret)
- goto out_put_clk;
+ goto out_disable_clk;
netif_carrier_off(dev);
platform_set_drvdata(pdev, dev);
@@ -2778,6 +2787,9 @@ static int bcm_enetsw_probe(struct platform_device *pdev)
return 0;
+out_disable_clk:
+ clk_disable_unprepare(priv->mac_clk);
+
out_put_clk:
clk_put(priv->mac_clk);
@@ -2809,6 +2821,9 @@ static int bcm_enetsw_remove(struct platform_device *pdev)
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(res->start, resource_size(res));
+ clk_disable_unprepare(priv->mac_clk);
+ clk_put(priv->mac_clk);
+
free_netdev(dev);
return 0;
}
--
2.13.2
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH 2/6] bcm63xx_enet: do not write to random DMA channel on BCM6345
2017-10-01 11:02 [PATCH 0/6] bcm63xx_enet: small fixes and cleanups Jonas Gorski
2017-10-01 11:02 ` [PATCH 1/6] bcm63xx_enet: correct clock usage Jonas Gorski
@ 2017-10-01 11:02 ` Jonas Gorski
2017-10-01 11:02 ` [PATCH 3/6] bcm63xx_enet: do not rely on probe order Jonas Gorski
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Jonas Gorski @ 2017-10-01 11:02 UTC (permalink / raw)
To: linux-arm-kernel
The DMA controller regs actually point to DMA channel 0, so the write to
ENETDMA_CFG_REG will actually modify a random DMA channel.
Since DMA controller registers do not exist on BCM6345, guard the write
with the usual check for dma_has_sram.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
---
drivers/net/ethernet/broadcom/bcm63xx_enet.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index a45ec97b5b1e..a1e1e12e187a 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -1062,7 +1062,8 @@ static int bcm_enet_open(struct net_device *dev)
val = enet_readl(priv, ENET_CTL_REG);
val |= ENET_CTL_ENABLE_MASK;
enet_writel(priv, val, ENET_CTL_REG);
- enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
+ if (priv->dma_has_sram)
+ enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
enet_dmac_writel(priv, priv->dma_chan_en_mask,
ENETDMAC_CHANCFG, priv->rx_chan);
--
2.13.2
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH 3/6] bcm63xx_enet: do not rely on probe order
2017-10-01 11:02 [PATCH 0/6] bcm63xx_enet: small fixes and cleanups Jonas Gorski
2017-10-01 11:02 ` [PATCH 1/6] bcm63xx_enet: correct clock usage Jonas Gorski
2017-10-01 11:02 ` [PATCH 2/6] bcm63xx_enet: do not write to random DMA channel on BCM6345 Jonas Gorski
@ 2017-10-01 11:02 ` Jonas Gorski
2017-10-01 11:02 ` [PATCH 4/6] bcm63xx_enet: use managed functions for clock/ioremap Jonas Gorski
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Jonas Gorski @ 2017-10-01 11:02 UTC (permalink / raw)
To: linux-arm-kernel
Do not rely on the shared device being probed before the enet(sw)
devices. This makes it easier to eventually move out the shared
device as a dma controller driver (what it should be).
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
---
drivers/net/ethernet/broadcom/bcm63xx_enet.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index a1e1e12e187a..8caf6abab3a6 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -1722,10 +1722,8 @@ static int bcm_enet_probe(struct platform_device *pdev)
const char *clk_name;
int i, ret;
- /* stop if shared driver failed, assume driver->probe will be
- * called in the same order we register devices (correct ?) */
if (!bcm_enet_shared_base[0])
- return -ENODEV;
+ return -EPROBE_DEFER;
res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
res_irq_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
@@ -2696,11 +2694,8 @@ static int bcm_enetsw_probe(struct platform_device *pdev)
struct resource *res_mem;
int ret, irq_rx, irq_tx;
- /* stop if shared driver failed, assume driver->probe will be
- * called in the same order we register devices (correct ?)
- */
if (!bcm_enet_shared_base[0])
- return -ENODEV;
+ return -EPROBE_DEFER;
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq_rx = platform_get_irq(pdev, 0);
--
2.13.2
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH 4/6] bcm63xx_enet: use managed functions for clock/ioremap
2017-10-01 11:02 [PATCH 0/6] bcm63xx_enet: small fixes and cleanups Jonas Gorski
` (2 preceding siblings ...)
2017-10-01 11:02 ` [PATCH 3/6] bcm63xx_enet: do not rely on probe order Jonas Gorski
@ 2017-10-01 11:02 ` Jonas Gorski
2017-10-01 11:02 ` [PATCH 5/6] bcm63xx_enet: drop unneeded NULL phy_clk check Jonas Gorski
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Jonas Gorski @ 2017-10-01 11:02 UTC (permalink / raw)
To: linux-arm-kernel
Use managed functions where possible to reduce the amount of resource
handling on error and remove paths.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
---
drivers/net/ethernet/broadcom/bcm63xx_enet.c | 54 +++++++---------------------
1 file changed, 12 insertions(+), 42 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index 8caf6abab3a6..059ef4f1d137 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -1767,14 +1767,14 @@ static int bcm_enet_probe(struct platform_device *pdev)
clk_name = "enet1";
}
- priv->mac_clk = clk_get(&pdev->dev, clk_name);
+ priv->mac_clk = devm_clk_get(&pdev->dev, clk_name);
if (IS_ERR(priv->mac_clk)) {
ret = PTR_ERR(priv->mac_clk);
goto out;
}
ret = clk_prepare_enable(priv->mac_clk);
if (ret)
- goto out_put_clk_mac;
+ goto out;
/* initialize default and fetch platform data */
priv->rx_ring_size = BCMENET_DEF_RX_DESC;
@@ -1802,7 +1802,7 @@ static int bcm_enet_probe(struct platform_device *pdev)
if (priv->mac_id == 0 && priv->has_phy && !priv->use_external_mii) {
/* using internal PHY, enable clock */
- priv->phy_clk = clk_get(&pdev->dev, "ephy");
+ priv->phy_clk = devm_clk_get(&pdev->dev, "ephy");
if (IS_ERR(priv->phy_clk)) {
ret = PTR_ERR(priv->phy_clk);
priv->phy_clk = NULL;
@@ -1810,7 +1810,7 @@ static int bcm_enet_probe(struct platform_device *pdev)
}
ret = clk_prepare_enable(priv->phy_clk);
if (ret)
- goto out_put_clk_phy;
+ goto out_disable_clk_mac;
}
/* do minimal hardware init to be able to probe mii bus */
@@ -1906,14 +1906,8 @@ static int bcm_enet_probe(struct platform_device *pdev)
if (priv->phy_clk)
clk_disable_unprepare(priv->phy_clk);
-out_put_clk_phy:
- if (priv->phy_clk)
- clk_put(priv->phy_clk);
-
out_disable_clk_mac:
clk_disable_unprepare(priv->mac_clk);
-out_put_clk_mac:
- clk_put(priv->mac_clk);
out:
free_netdev(dev);
return ret;
@@ -1949,12 +1943,10 @@ static int bcm_enet_remove(struct platform_device *pdev)
}
/* disable hw block clocks */
- if (priv->phy_clk) {
+ if (priv->phy_clk)
clk_disable_unprepare(priv->phy_clk);
- clk_put(priv->phy_clk);
- }
+
clk_disable_unprepare(priv->mac_clk);
- clk_put(priv->mac_clk);
free_netdev(dev);
return 0;
@@ -2734,26 +2726,20 @@ static int bcm_enetsw_probe(struct platform_device *pdev)
if (ret)
goto out;
- if (!request_mem_region(res_mem->start, resource_size(res_mem),
- "bcm63xx_enetsw")) {
- ret = -EBUSY;
+ priv->base = devm_ioremap_resource(&pdev->dev, res_mem);
+ if (IS_ERR(priv->base)) {
+ ret = PTR_ERR(priv->base);
goto out;
}
- priv->base = ioremap(res_mem->start, resource_size(res_mem));
- if (priv->base == NULL) {
- ret = -ENOMEM;
- goto out_release_mem;
- }
-
- priv->mac_clk = clk_get(&pdev->dev, "enetsw");
+ priv->mac_clk = devm_clk_get(&pdev->dev, "enetsw");
if (IS_ERR(priv->mac_clk)) {
ret = PTR_ERR(priv->mac_clk);
- goto out_unmap;
+ goto out;
}
ret = clk_prepare_enable(priv->mac_clk);
if (ret)
- goto out_put_clk;
+ goto out;
priv->rx_chan = 0;
priv->tx_chan = 1;
@@ -2785,15 +2771,6 @@ static int bcm_enetsw_probe(struct platform_device *pdev)
out_disable_clk:
clk_disable_unprepare(priv->mac_clk);
-
-out_put_clk:
- clk_put(priv->mac_clk);
-
-out_unmap:
- iounmap(priv->base);
-
-out_release_mem:
- release_mem_region(res_mem->start, resource_size(res_mem));
out:
free_netdev(dev);
return ret;
@@ -2805,20 +2782,13 @@ static int bcm_enetsw_remove(struct platform_device *pdev)
{
struct bcm_enet_priv *priv;
struct net_device *dev;
- struct resource *res;
/* stop netdevice */
dev = platform_get_drvdata(pdev);
priv = netdev_priv(dev);
unregister_netdev(dev);
- /* release device resources */
- iounmap(priv->base);
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(res->start, resource_size(res));
-
clk_disable_unprepare(priv->mac_clk);
- clk_put(priv->mac_clk);
free_netdev(dev);
return 0;
--
2.13.2
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH 5/6] bcm63xx_enet: drop unneeded NULL phy_clk check
2017-10-01 11:02 [PATCH 0/6] bcm63xx_enet: small fixes and cleanups Jonas Gorski
` (3 preceding siblings ...)
2017-10-01 11:02 ` [PATCH 4/6] bcm63xx_enet: use managed functions for clock/ioremap Jonas Gorski
@ 2017-10-01 11:02 ` Jonas Gorski
2017-10-01 11:02 ` [PATCH 6/6] bcm63xx_enet: remove unneeded include Jonas Gorski
2017-10-02 6:06 ` [PATCH 0/6] bcm63xx_enet: small fixes and cleanups David Miller
6 siblings, 0 replies; 8+ messages in thread
From: Jonas Gorski @ 2017-10-01 11:02 UTC (permalink / raw)
To: linux-arm-kernel
clk_disable and clk_unprepare are NULL-safe, so need to duplicate the
NULL check of the functions.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
---
drivers/net/ethernet/broadcom/bcm63xx_enet.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index 059ef4f1d137..f6bc13fe8a99 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -1903,8 +1903,7 @@ static int bcm_enet_probe(struct platform_device *pdev)
out_uninit_hw:
/* turn off mdc clock */
enet_writel(priv, 0, ENET_MIISC_REG);
- if (priv->phy_clk)
- clk_disable_unprepare(priv->phy_clk);
+ clk_disable_unprepare(priv->phy_clk);
out_disable_clk_mac:
clk_disable_unprepare(priv->mac_clk);
@@ -1943,9 +1942,7 @@ static int bcm_enet_remove(struct platform_device *pdev)
}
/* disable hw block clocks */
- if (priv->phy_clk)
- clk_disable_unprepare(priv->phy_clk);
-
+ clk_disable_unprepare(priv->phy_clk);
clk_disable_unprepare(priv->mac_clk);
free_netdev(dev);
--
2.13.2
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH 6/6] bcm63xx_enet: remove unneeded include
2017-10-01 11:02 [PATCH 0/6] bcm63xx_enet: small fixes and cleanups Jonas Gorski
` (4 preceding siblings ...)
2017-10-01 11:02 ` [PATCH 5/6] bcm63xx_enet: drop unneeded NULL phy_clk check Jonas Gorski
@ 2017-10-01 11:02 ` Jonas Gorski
2017-10-02 6:06 ` [PATCH 0/6] bcm63xx_enet: small fixes and cleanups David Miller
6 siblings, 0 replies; 8+ messages in thread
From: Jonas Gorski @ 2017-10-01 11:02 UTC (permalink / raw)
To: linux-arm-kernel
We don't use anyhing from that file, so drop it.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
---
drivers/net/ethernet/broadcom/bcm63xx_enet.h | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.h b/drivers/net/ethernet/broadcom/bcm63xx_enet.h
index 0a1b7b2e55bd..dd6ae3077433 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.h
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.h
@@ -8,7 +8,6 @@
#include <linux/platform_device.h>
#include <bcm63xx_regs.h>
-#include <bcm63xx_irq.h>
#include <bcm63xx_io.h>
#include <bcm63xx_iudma.h>
--
2.13.2
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH 0/6] bcm63xx_enet: small fixes and cleanups
2017-10-01 11:02 [PATCH 0/6] bcm63xx_enet: small fixes and cleanups Jonas Gorski
` (5 preceding siblings ...)
2017-10-01 11:02 ` [PATCH 6/6] bcm63xx_enet: remove unneeded include Jonas Gorski
@ 2017-10-02 6:06 ` David Miller
6 siblings, 0 replies; 8+ messages in thread
From: David Miller @ 2017-10-02 6:06 UTC (permalink / raw)
To: linux-arm-kernel
From: Jonas Gorski <jonas.gorski@gmail.com>
Date: Sun, 1 Oct 2017 13:02:14 +0200
> This patch set fixes a few theoretical issues and cleans up the code a
> bit. It also adds a bit more managed function usage to simplify clock
> and iomem usage.
>
> Based on net-next.
Series applied.
^ permalink raw reply [flat|nested] 8+ messages in thread