[PATCH v3 net-next 08/10] net: korina: Get mdio input clock via common clock framework
From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Date: 2021-04-14 23:07:25
Also in:
lkml
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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> --- drivers/net/ethernet/korina.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/korina.c b/drivers/net/ethernet/korina.c
index 7646ccc9d7e8..62bb691c8354 100644
--- a/drivers/net/ethernet/korina.c
+++ b/drivers/net/ethernet/korina.c@@ -57,14 +57,13 @@ #include <linux/ethtool.h> #include <linux/crc32.h> #include <linux/pgtable.h> +#include <linux/clk.h> #include <asm/bootinfo.h> #include <asm/bitops.h> #include <asm/io.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/dma_v.h>
@@ -146,10 +145,9 @@ struct korina_private { struct work_struct restart_task; struct net_device *dev; 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) { return lp->td_dma + (idx * sizeof(struct dma_desc));
@@ -897,8 +895,8 @@ static int korina_init(struct net_device *dev) /* Management Clock Prescaler Divisor * Clock independent setting */ - writel(((idt_cpu_freq) / MII_CLOCK + 1) & ~1, - &lp->eth_regs->ethmcp); + writel(((lp->mii_clock_freq) / MII_CLOCK + 1) & ~1, + &lp->eth_regs->ethmcp); writel(0, &lp->eth_regs->miimcfg); /* don't transmit until fifo contains 48b */
@@ -1058,6 +1056,7 @@ static int korina_probe(struct platform_device *pdev) u8 *mac_addr = dev_get_platdata(&pdev->dev); struct korina_private *lp; struct net_device *dev; + struct clk *clk; void __iomem *p; int rc;
@@ -1079,6 +1078,14 @@ static int korina_probe(struct platform_device *pdev) eth_hw_addr_random(dev); } + clk = devm_clk_get(&pdev->dev, NULL); + if (!IS_ERR(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, "korina_rx"); lp->tx_irq = platform_get_irq_byname(pdev, "korina_tx");
--
2.29.2