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net: korina: Get mdio input clock via common clock framework 

With device tree clock is provided via CCF. For non device tree
use a maximum clock value to not overclock the PHY. The non device
tree usage will go away after platform is converted to DT.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Bogendoerfer 2021-04-19 00:19:46 +02:00 committed by David S. Miller
parent 10b26f0781
commit e4cd854ec4
1 changed files with 15 additions and 6 deletions
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21
drivers/net/ethernet/korina.c
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@ -57,14 +57,13 @@
#include <linux/ethtool.h> #include <linux/ethtool.h>
#include <linux/crc32.h> #include <linux/crc32.h>
#include <linux/pgtable.h> #include <linux/pgtable.h>
#include <linux/clk.h>
#include <asm/bootinfo.h> #include <asm/bootinfo.h>
#include <asm/bitops.h> #include <asm/bitops.h>
#include <asm/io.h> #include <asm/io.h>
#include <asm/dma.h> #include <asm/dma.h>
#include <asm/mach-rc32434/rb.h>
#include <asm/mach-rc32434/rc32434.h>
#include <asm/mach-rc32434/eth.h> #include <asm/mach-rc32434/eth.h>
#include <asm/mach-rc32434/dma_v.h> #include <asm/mach-rc32434/dma_v.h>
@ -146,10 +145,9 @@ struct korina_private {
struct work_struct restart_task; struct work_struct restart_task;
struct net_device *dev; struct net_device *dev;
struct device *dmadev; struct device *dmadev;
int mii_clock_freq;
}; };
extern unsigned int idt_cpu_freq;
static dma_addr_t korina_tx_dma(struct korina_private *lp, int idx) static dma_addr_t korina_tx_dma(struct korina_private *lp, int idx)
{ {
return lp->td_dma + (idx * sizeof(struct dma_desc)); return lp->td_dma + (idx * sizeof(struct dma_desc));
@ -899,8 +897,8 @@ static int korina_init(struct net_device *dev)
/* Management Clock Prescaler Divisor /* Management Clock Prescaler Divisor
* Clock independent setting */ * Clock independent setting */
writel(((idt_cpu_freq) / MII_CLOCK + 1) & ~1, writel(((lp->mii_clock_freq) / MII_CLOCK + 1) & ~1,
&lp->eth_regs->ethmcp); &lp->eth_regs->ethmcp);
writel(0, &lp->eth_regs->miimcfg); writel(0, &lp->eth_regs->miimcfg);
/* don't transmit until fifo contains 48b */ /* don't transmit until fifo contains 48b */
@ -1060,6 +1058,7 @@ static int korina_probe(struct platform_device *pdev)
u8 *mac_addr = dev_get_platdata(&pdev->dev); u8 *mac_addr = dev_get_platdata(&pdev->dev);
struct korina_private *lp; struct korina_private *lp;
struct net_device *dev; struct net_device *dev;
struct clk *clk;
void __iomem *p; void __iomem *p;
int rc; int rc;
@ -1075,6 +1074,16 @@ static int korina_probe(struct platform_device *pdev)
else if (of_get_mac_address(pdev->dev.of_node, dev->dev_addr) < 0) else if (of_get_mac_address(pdev->dev.of_node, dev->dev_addr) < 0)
eth_hw_addr_random(dev); eth_hw_addr_random(dev);
clk = devm_clk_get_optional(&pdev->dev, "mdioclk");
if (IS_ERR(clk))
return PTR_ERR(clk);
if (clk) {
clk_prepare_enable(clk);
lp->mii_clock_freq = clk_get_rate(clk);
} else {
lp->mii_clock_freq = 200000000; /* max possible input clk */
}
lp->rx_irq = platform_get_irq_byname(pdev, "rx"); lp->rx_irq = platform_get_irq_byname(pdev, "rx");
lp->tx_irq = platform_get_irq_byname(pdev, "tx"); lp->tx_irq = platform_get_irq_byname(pdev, "tx");