Commit c625e725 authored by Jiawen Wu's avatar Jiawen Wu Committed by Paolo Abeni
Browse files

net: txgbe: Register I2C platform device 



Register the platform device to use Designware I2C bus master driver.
Use regmap to read/write I2C device region from given base offset.

Signed-off-by: default avatarJiawen Wu <jiawenwu@trustnetic.com>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Reviewed-by: default avatarPiotr Raczynski <piotr.raczynski@intel.com>
Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: default avatarMaciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent b63f2048

drivers/net/ethernet/wangxun/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -41,6 +41,9 @@ config TXGBE 
	tristate "Wangxun(R) 10GbE PCI Express adapters support"

	depends on PCI

	depends on COMMON_CLK

	select REGMAP

	select I2C

	select I2C_DESIGNWARE_PLATFORM

	select LIBWX

	help

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

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

+70 −0
Original line number Diff line number Diff line
@@ -6,6 +6,8 @@ 
#include <linux/clkdev.h>

#include <linux/i2c.h>

#include <linux/pci.h>

#include <linux/platform_device.h>

#include <linux/regmap.h>



#include "../libwx/wx_type.h"

#include "txgbe_type.h"
@@ -98,6 +100,64 @@ static int txgbe_clock_register(struct txgbe *txgbe) 
	return 0;

}



static int txgbe_i2c_read(void *context, unsigned int reg, unsigned int *val)

{

	struct wx *wx = context;



	*val = rd32(wx, reg + TXGBE_I2C_BASE);



	return 0;

}



static int txgbe_i2c_write(void *context, unsigned int reg, unsigned int val)

{

	struct wx *wx = context;



	wr32(wx, reg + TXGBE_I2C_BASE, val);



	return 0;

}



static const struct regmap_config i2c_regmap_config = {

	.reg_bits = 32,

	.val_bits = 32,

	.reg_read = txgbe_i2c_read,

	.reg_write = txgbe_i2c_write,

	.fast_io = true,

};



static int txgbe_i2c_register(struct txgbe *txgbe)

{

	struct platform_device_info info = {};

	struct platform_device *i2c_dev;

	struct regmap *i2c_regmap;

	struct pci_dev *pdev;

	struct wx *wx;



	wx = txgbe->wx;

	pdev = wx->pdev;

	i2c_regmap = devm_regmap_init(&pdev->dev, NULL, wx, &i2c_regmap_config);

	if (IS_ERR(i2c_regmap)) {

		wx_err(wx, "failed to init I2C regmap\n");

		return PTR_ERR(i2c_regmap);

	}



	info.parent = &pdev->dev;

	info.fwnode = software_node_fwnode(txgbe->nodes.group[SWNODE_I2C]);

	info.name = "i2c_designware";

	info.id = (pdev->bus->number << 8) | pdev->devfn;



	info.res = &DEFINE_RES_IRQ(pdev->irq);

	info.num_res = 1;

	i2c_dev = platform_device_register_full(&info);

	if (IS_ERR(i2c_dev))

		return PTR_ERR(i2c_dev);



	txgbe->i2c_dev = i2c_dev;



	return 0;

}



int txgbe_init_phy(struct txgbe *txgbe)

{

	int ret;
@@ -114,8 +174,17 @@ int txgbe_init_phy(struct txgbe *txgbe) 
		goto err_unregister_swnode;

	}



	ret = txgbe_i2c_register(txgbe);

	if (ret) {

		wx_err(txgbe->wx, "failed to init i2c interface: %d\n", ret);

		goto err_unregister_clk;

	}



	return 0;



err_unregister_clk:

	clkdev_drop(txgbe->clock);

	clk_unregister(txgbe->clk);

err_unregister_swnode:

	software_node_unregister_node_group(txgbe->nodes.group);
@@ -124,6 +193,7 @@ int txgbe_init_phy(struct txgbe *txgbe) 


void txgbe_remove_phy(struct txgbe *txgbe)

{

	platform_device_unregister(txgbe->i2c_dev);

	clkdev_drop(txgbe->clock);

	clk_unregister(txgbe->clk);

	software_node_unregister_node_group(txgbe->nodes.group);

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

+4 −0
Original line number Diff line number Diff line
@@ -55,6 +55,9 @@ 
#define TXGBE_TS_CTL                            0x10300

#define TXGBE_TS_CTL_EVAL_MD                    BIT(31)



/* I2C registers */

#define TXGBE_I2C_BASE                          0x14900



/* Part Number String Length */

#define TXGBE_PBANUM_LENGTH                     32
@@ -147,6 +150,7 @@ struct txgbe_nodes { 
struct txgbe {

	struct wx *wx;

	struct txgbe_nodes nodes;

	struct platform_device *i2c_dev;

	struct clk_lookup *clock;

	struct clk *clk;

};