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net: ethernet: macb: Add support for rx_clk

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Some of the platforms like zynqmp ultrascale+ has a
separate clock gate for the rx clock. Add an optional
rx_clk so that the clock can be enabled.

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
shubhrajyoti.datta@xilinx.com 2016-08-16 10:14:50 +05:30 committed by David S. Miller
parent d52bfbda77
commit aead88bd0e
3 changed files with 30 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Documentation/devicetree/bindings/net/macb.txt
View File

@ -21,6 +21,7 @@ Required properties:
- clock-names: Tuple listing input clock names.
Required elements: 'pclk', 'hclk'
Optional elements: 'tx_clk'
Optional elements: 'rx_clk' applies to cdns,zynqmp-gem
- clocks: Phandles to input clocks.
Optional properties for PHY child node:

31
drivers/net/ethernet/cadence/macb.c
View File

@ -2332,7 +2332,8 @@ 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 **hclk, struct clk **tx_clk,
struct clk **rx_clk)
{
int err;
@ -2354,6 +2355,10 @@ static int macb_clk_init(struct platform_device *pdev, struct clk **pclk,
if (IS_ERR(*tx_clk))
*tx_clk = NULL;
*rx_clk = devm_clk_get(&pdev->dev, "rx_clk");
if (IS_ERR(*rx_clk))
*rx_clk = NULL;
err = clk_prepare_enable(*pclk);
if (err) {
dev_err(&pdev->dev, "failed to enable pclk (%u)\n", err);
@ -2372,8 +2377,17 @@ static int macb_clk_init(struct platform_device *pdev, struct clk **pclk,
goto err_disable_hclk;
}
err = clk_prepare_enable(*rx_clk);
if (err) {
dev_err(&pdev->dev, "failed to enable rx_clk (%u)\n", err);
goto err_disable_txclk;
}
return 0;
err_disable_txclk:
clk_disable_unprepare(*tx_clk);
err_disable_hclk:
clk_disable_unprepare(*hclk);
@ -2763,12 +2777,14 @@ 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 **hclk, struct clk **tx_clk,
struct clk **rx_clk)
{
int err;
*hclk = NULL;
*tx_clk = NULL;
*rx_clk = NULL;
*pclk = devm_clk_get(&pdev->dev, "ether_clk");
if (IS_ERR(*pclk))
@ -2892,13 +2908,13 @@ MODULE_DEVICE_TABLE(of, macb_dt_ids);
static int macb_probe(struct platform_device *pdev)
{
int (*clk_init)(struct platform_device *, struct clk **,
struct clk **, struct clk **)
struct clk **, struct clk **, struct clk **)
= macb_clk_init;
int (*init)(struct platform_device *) = macb_init;
struct device_node *np = pdev->dev.of_node;
struct device_node *phy_node;
const struct macb_config *macb_config = NULL;
struct clk *pclk, *hclk = NULL, *tx_clk = NULL;
struct clk *pclk, *hclk = NULL, *tx_clk = NULL, *rx_clk = NULL;
unsigned int queue_mask, num_queues;
struct macb_platform_data *pdata;
bool native_io;
@ -2926,7 +2942,7 @@ static int macb_probe(struct platform_device *pdev)
}
}
err = clk_init(pdev, &pclk, &hclk, &tx_clk);
err = clk_init(pdev, &pclk, &hclk, &tx_clk, &rx_clk);
if (err)
return err;
@ -2962,6 +2978,7 @@ static int macb_probe(struct platform_device *pdev)
bp->pclk = pclk;
bp->hclk = hclk;
bp->tx_clk = tx_clk;
bp->rx_clk = rx_clk;
if (macb_config)
bp->jumbo_max_len = macb_config->jumbo_max_len;
@ -3060,6 +3077,7 @@ err_disable_clocks:
clk_disable_unprepare(tx_clk);
clk_disable_unprepare(hclk);
clk_disable_unprepare(pclk);
clk_disable_unprepare(rx_clk);
return err;
}
@ -3086,6 +3104,7 @@ static int macb_remove(struct platform_device *pdev)
clk_disable_unprepare(bp->tx_clk);
clk_disable_unprepare(bp->hclk);
clk_disable_unprepare(bp->pclk);
clk_disable_unprepare(bp->rx_clk);
free_netdev(dev);
}
@ -3109,6 +3128,7 @@ static int __maybe_unused macb_suspend(struct device *dev)
clk_disable_unprepare(bp->tx_clk);
clk_disable_unprepare(bp->hclk);
clk_disable_unprepare(bp->pclk);
clk_disable_unprepare(bp->rx_clk);
}
return 0;
@ -3128,6 +3148,7 @@ static int __maybe_unused macb_resume(struct device *dev)
clk_prepare_enable(bp->pclk);
clk_prepare_enable(bp->hclk);
clk_prepare_enable(bp->tx_clk);
clk_prepare_enable(bp->rx_clk);
}
netif_device_attach(netdev);

4
drivers/net/ethernet/cadence/macb.h
View File

@ -772,7 +772,8 @@ struct macb_config {
u32 caps;
unsigned int dma_burst_length;
int (*clk_init)(struct platform_device *pdev, struct clk **pclk,
struct clk **hclk, struct clk **tx_clk);
struct clk **hclk, struct clk **tx_clk,
struct clk **rx_clk);
int (*init)(struct platform_device *pdev);
int jumbo_max_len;
};
@ -819,6 +820,7 @@ struct macb {
struct clk *pclk;
struct clk *hclk;
struct clk *tx_clk;
struct clk *rx_clk;
struct net_device *dev;
struct napi_struct napi;
struct net_device_stats stats;