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net: macb: Support clock management for tsu_clk 

TSU clock needs to be enabled/disabled as per support in devicetree
and it should also be controlled during suspend/resume (WOL has no
dependency on this clock).

Signed-off-by: Harini Katakam <harini.katakam@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Harini Katakam 2019-03-01 16:20:33 +05:30 committed by David S. Miller
parent 8beb79b7ae
commit f5473d1d44
2 changed files with 27 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/ethernet/cadence/macb.h
View File

@ -1085,7 +1085,7 @@ struct macb_config {
unsigned int dma_burst_length;
int (*clk_init)(struct platform_device *pdev, struct clk **pclk,
struct clk **hclk, struct clk **tx_clk,
struct clk **rx_clk);
struct clk **rx_clk, struct clk **tsu_clk);
int (*init)(struct platform_device *pdev);
int jumbo_max_len;
};
@ -1165,6 +1165,7 @@ struct macb {
struct clk *hclk;
struct clk *tx_clk;
struct clk *rx_clk;
struct clk *tsu_clk;
struct net_device *dev;
union {
struct macb_stats macb;

30
drivers/net/ethernet/cadence/macb_main.c
View File

@ -3325,7 +3325,7 @@ static void macb_probe_queues(void __iomem *mem,
static int macb_clk_init(struct platform_device *pdev, struct clk **pclk,
struct clk **hclk, struct clk **tx_clk,
struct clk **rx_clk)
struct clk **rx_clk, struct clk **tsu_clk)
{
struct macb_platform_data *pdata;
int err;
@ -3359,6 +3359,10 @@ static int macb_clk_init(struct platform_device *pdev, struct clk **pclk,
if (IS_ERR(*rx_clk))
*rx_clk = NULL;
*tsu_clk = devm_clk_get(&pdev->dev, "tsu_clk");
if (IS_ERR(*tsu_clk))
*tsu_clk = NULL;
err = clk_prepare_enable(*pclk);
if (err) {
dev_err(&pdev->dev, "failed to enable pclk (%u)\n", err);
@ -3383,8 +3387,17 @@ static int macb_clk_init(struct platform_device *pdev, struct clk **pclk,
goto err_disable_txclk;
}
err = clk_prepare_enable(*tsu_clk);
if (err) {
dev_err(&pdev->dev, "failed to enable tsu_clk (%u)\n", err);
goto err_disable_rxclk;
}
return 0;
err_disable_rxclk:
clk_disable_unprepare(*rx_clk);
err_disable_txclk:
clk_disable_unprepare(*tx_clk);
@ -3835,13 +3848,14 @@ static const struct net_device_ops at91ether_netdev_ops = {
static int at91ether_clk_init(struct platform_device *pdev, struct clk **pclk,
struct clk **hclk, struct clk **tx_clk,
struct clk **rx_clk)
struct clk **rx_clk, struct clk **tsu_clk)
{
int err;
*hclk = NULL;
*tx_clk = NULL;
*rx_clk = NULL;
*tsu_clk = NULL;
*pclk = devm_clk_get(&pdev->dev, "ether_clk");
if (IS_ERR(*pclk))
@ -3992,11 +4006,12 @@ static int macb_probe(struct platform_device *pdev)
{
const struct macb_config *macb_config = &default_gem_config;
int (*clk_init)(struct platform_device *, struct clk **,
struct clk **, struct clk **, struct clk **)
= macb_config->clk_init;
struct clk **, struct clk **, struct clk **,
struct clk **) = macb_config->clk_init;
int (*init)(struct platform_device *) = macb_config->init;
struct device_node *np = pdev->dev.of_node;
struct clk *pclk, *hclk = NULL, *tx_clk = NULL, *rx_clk = NULL;
struct clk *tsu_clk = NULL;
unsigned int queue_mask, num_queues;
struct macb_platform_data *pdata;
bool native_io;
@ -4024,7 +4039,7 @@ static int macb_probe(struct platform_device *pdev)
}
}
err = clk_init(pdev, &pclk, &hclk, &tx_clk, &rx_clk);
err = clk_init(pdev, &pclk, &hclk, &tx_clk, &rx_clk, &tsu_clk);
if (err)
return err;
@ -4061,6 +4076,7 @@ static int macb_probe(struct platform_device *pdev)
bp->hclk = hclk;
bp->tx_clk = tx_clk;
bp->rx_clk = rx_clk;
bp->tsu_clk = tsu_clk;
if (macb_config)
bp->jumbo_max_len = macb_config->jumbo_max_len;
@ -4180,6 +4196,7 @@ static int macb_probe(struct platform_device *pdev)
clk_disable_unprepare(hclk);
clk_disable_unprepare(pclk);
clk_disable_unprepare(rx_clk);
clk_disable_unprepare(tsu_clk);
return err;
}
@ -4207,6 +4224,7 @@ static int macb_remove(struct platform_device *pdev)
clk_disable_unprepare(bp->hclk);
clk_disable_unprepare(bp->pclk);
clk_disable_unprepare(bp->rx_clk);
clk_disable_unprepare(bp->tsu_clk);
of_node_put(bp->phy_node);
free_netdev(dev);
}
@ -4232,6 +4250,7 @@ static int __maybe_unused macb_suspend(struct device *dev)
clk_disable_unprepare(bp->pclk);
clk_disable_unprepare(bp->rx_clk);
}
clk_disable_unprepare(bp->tsu_clk);
return 0;
}
@ -4251,6 +4270,7 @@ static int __maybe_unused macb_resume(struct device *dev)
clk_prepare_enable(bp->tx_clk);
clk_prepare_enable(bp->rx_clk);
}
clk_prepare_enable(bp->tsu_clk);
netif_device_attach(netdev);