Commit b63f2048 authored by Jiawen Wu's avatar Jiawen Wu Committed by Paolo Abeni
Browse files

net: txgbe: Register fixed rate clock 



In order for I2C to be able to work in standard mode, register a fixed
rate clock for each I2C device.

Signed-off-by: default avatarJiawen Wu <jiawenwu@trustnetic.com>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Reviewed-by: default avatarMaciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent c3e382ad

drivers/net/ethernet/wangxun/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ config NGBE 
config TXGBE

	tristate "Wangxun(R) 10GbE PCI Express adapters support"

	depends on PCI

	depends on COMMON_CLK

	select LIBWX

	help

	  This driver supports Wangxun(R) 10GbE PCI Express family of

drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c

+41 −0
Original line number Diff line number Diff line
@@ -2,6 +2,8 @@ 
/* Copyright (c) 2015 - 2023 Beijing WangXun Technology Co., Ltd. */



#include <linux/gpio/property.h>

#include <linux/clk-provider.h>

#include <linux/clkdev.h>

#include <linux/i2c.h>

#include <linux/pci.h>
@@ -70,6 +72,32 @@ static int txgbe_swnodes_register(struct txgbe *txgbe) 
	return software_node_register_node_group(nodes->group);

}



static int txgbe_clock_register(struct txgbe *txgbe)

{

	struct pci_dev *pdev = txgbe->wx->pdev;

	struct clk_lookup *clock;

	char clk_name[32];

	struct clk *clk;



	snprintf(clk_name, sizeof(clk_name), "i2c_designware.%d",

		 (pdev->bus->number << 8) | pdev->devfn);



	clk = clk_register_fixed_rate(NULL, clk_name, NULL, 0, 156250000);

	if (IS_ERR(clk))

		return PTR_ERR(clk);



	clock = clkdev_create(clk, NULL, clk_name);

	if (!clock) {

		clk_unregister(clk);

		return -ENOMEM;

	}



	txgbe->clk = clk;

	txgbe->clock = clock;



	return 0;

}



int txgbe_init_phy(struct txgbe *txgbe)

{

	int ret;
@@ -80,10 +108,23 @@ int txgbe_init_phy(struct txgbe *txgbe) 
		return ret;

	}



	ret = txgbe_clock_register(txgbe);

	if (ret) {

		wx_err(txgbe->wx, "failed to register clock: %d\n", ret);

		goto err_unregister_swnode;

	}



	return 0;



err_unregister_swnode:

	software_node_unregister_node_group(txgbe->nodes.group);



	return ret;

}



void txgbe_remove_phy(struct txgbe *txgbe)

{

	clkdev_drop(txgbe->clock);

	clk_unregister(txgbe->clk);

	software_node_unregister_node_group(txgbe->nodes.group);

}

drivers/net/ethernet/wangxun/txgbe/txgbe_type.h

+2 −0
Original line number Diff line number Diff line
@@ -147,6 +147,8 @@ struct txgbe_nodes { 
struct txgbe {

	struct wx *wx;

	struct txgbe_nodes nodes;

	struct clk_lookup *clock;

	struct clk *clk;

};



#endif /* _TXGBE_TYPE_H_ */