[PATCH net-next v3 3/8] net: txgbe: Register I2C platform device

Jiawen Wu
2023-04-19T08:31:31Z

Register the platform device to use Designware I2C bus master driver.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
---
drivers/net/ethernet/wangxun/Kconfig | 1 +
.../net/ethernet/wangxun/txgbe/txgbe_phy.c | 50 +++++++++++++++++++
.../net/ethernet/wangxun/txgbe/txgbe_type.h | 4 ++
3 files changed, 55 insertions(+)

diff --git a/drivers/net/ethernet/wangxun/Kconfig b/drivers/net/ethernet/wangxun/Kconfig
index c9d88673d306..8acd6a0d84dc 100644
--- a/drivers/net/ethernet/wangxun/Kconfig
+++ b/drivers/net/ethernet/wangxun/Kconfig
@@ -40,6 +40,7 @@ config NGBE
config TXGBE
tristate "Wangxun(R) 10GbE PCI Express adapters support"
depends on PCI
+ select I2C_DESIGNWARE_PLATFORM
select LIBWX
help
This driver supports Wangxun(R) 10GbE PCI Express family of
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c
index 39762c7fc851..8bb7f1d9acc7 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c
@@ -1,6 +1,8 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2015 - 2023 Beijing WangXun Technology Co., Ltd. */

+#include <linux/platform_data/i2c-dw.h>
+#include <linux/platform_device.h>
#include <linux/gpio/property.h>
#include <linux/i2c.h>
#include <linux/pci.h>
@@ -69,6 +71,40 @@ static int txgbe_swnodes_register(struct txgbe *txgbe)
return software_node_register_node_group(nodes->group);
}

+static int txgbe_i2c_register(struct txgbe *txgbe)
+{
+ struct pci_dev *pdev = txgbe->wx->pdev;
+ struct dw_i2c_platform_data pdata = {};
+ struct platform_device_info info = {};
+ struct platform_device *i2c_dev;
+ struct resource res = {};
+
+ pdata.base = txgbe->wx->hw_addr + TXGBE_I2C_BASE;
+ pdata.flags = BIT(11); /* MODEL_WANGXUN_SP */
+ pdata.ss_hcnt = 600;
+ pdata.ss_lcnt = 600;
+
+ 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.data = &pdata;
+ info.size_data = sizeof(pdata);
+
+ res.start = pdev->irq;
+ res.end = pdev->irq;
+ res.flags = IORESOURCE_IRQ;
+ info.res = &res;
+ 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;
@@ -79,10 +115,24 @@ int txgbe_init_phy(struct txgbe *txgbe)
return ret;
}

+ ret = txgbe_i2c_register(txgbe);
+ if (ret) {
+ wx_err(txgbe->wx, "failed to init i2c interface: %d\n", ret);
+ goto err;
+ }
+
return 0;
+
+err:
+ txgbe_remove_phy(txgbe);
+
+ return ret;
}

void txgbe_remove_phy(struct txgbe *txgbe)
{
+ if (txgbe->i2c_dev)
+ platform_device_unregister(txgbe->i2c_dev);
+
software_node_unregister_node_group(txgbe->nodes.group);
}
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h b/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
index 51bbecb28433..771aefbc7c80 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
@@ -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

@@ -146,6 +149,7 @@ struct txgbe_nodes {
struct txgbe {
struct wx *wx;
struct txgbe_nodes nodes;
+ struct platform_device *i2c_dev;
};

#endif /* _TXGBE_TYPE_H_ */
--
2.27.0