diff options
author | Jiawen Wu <jiawenwu@trustnetic.com> | 2023-06-06 12:21:02 +0300 |
---|---|---|
committer | Paolo Abeni <pabeni@redhat.com> | 2023-06-08 14:25:10 +0300 |
commit | c625e72561f6c9bd5d1a86aa4d1d5a68db43d2e0 (patch) | |
tree | de1fbe3d714f73e0c73c6991bca4021b49f7fb04 /drivers | |
parent | b63f20485e433e6e548df81f5c76556d7f187266 (diff) | |
download | linux-c625e72561f6c9bd5d1a86aa4d1d5a68db43d2e0.tar.xz |
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: Jiawen Wu <jiawenwu@trustnetic.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Piotr Raczynski <piotr.raczynski@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/ethernet/wangxun/Kconfig | 3 | ||||
-rw-r--r-- | drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c | 70 | ||||
-rw-r--r-- | drivers/net/ethernet/wangxun/txgbe/txgbe_type.h | 4 |
3 files changed, 77 insertions, 0 deletions
diff --git a/drivers/net/ethernet/wangxun/Kconfig b/drivers/net/ethernet/wangxun/Kconfig index 190d42a203b4..128cc1cb0605 100644 --- a/drivers/net/ethernet/wangxun/Kconfig +++ b/drivers/net/ethernet/wangxun/Kconfig @@ -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 diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c index 06506cfb8d06..24a729150e08 100644 --- a/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c +++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c @@ -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 @@ err_unregister_swnode: 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); diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h b/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h index 856d0f9d045b..6e471a4d68cc 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 @@ -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; }; |