diff options
| -rw-r--r-- | drivers/net/dsa/microchip/ksz9477.c | 18 | ||||
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_common.h | 18 |
2 files changed, 25 insertions, 11 deletions
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c index fc5157a10af5..83b7f2d5c1ea 100644 --- a/drivers/net/dsa/microchip/ksz9477.c +++ b/drivers/net/dsa/microchip/ksz9477.c @@ -329,11 +329,27 @@ int ksz9477_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data) int ksz9477_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val) { + u32 mask, val32; + /* No real PHY after this. */ if (!dev->info->internal_phy[addr]) return 0; - return ksz_pwrite16(dev, addr, 0x100 + (reg << 1), val); + if (reg < 0x10) + return ksz_pwrite16(dev, addr, 0x100 + (reg << 1), val); + + /* Errata: When using SPI, I2C, or in-band register access, + * writes to certain PHY registers should be performed as + * 32-bit writes instead of 16-bit writes. + */ + val32 = val; + mask = 0xffff; + if ((reg & 1) == 0) { + val32 <<= 16; + mask <<= 16; + } + reg &= ~1; + return ksz_prmw32(dev, addr, 0x100 + (reg << 1), mask, val32); } void ksz9477_cfg_port_member(struct ksz_device *dev, int port, u8 member) diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h index a66b56857ec6..28444e5924f9 100644 --- a/drivers/net/dsa/microchip/ksz_common.h +++ b/drivers/net/dsa/microchip/ksz_common.h @@ -578,17 +578,15 @@ static inline int ksz_pwrite32(struct ksz_device *dev, int port, int offset, static inline int ksz_prmw8(struct ksz_device *dev, int port, int offset, u8 mask, u8 val) { - int ret; - - ret = regmap_update_bits(ksz_regmap_8(dev), - dev->dev_ops->get_port_addr(port, offset), - mask, val); - if (ret) - dev_err(dev->dev, "can't rmw 8bit reg 0x%x: %pe\n", - dev->dev_ops->get_port_addr(port, offset), - ERR_PTR(ret)); + return ksz_rmw8(dev, dev->dev_ops->get_port_addr(port, offset), + mask, val); +} - return ret; +static inline int ksz_prmw32(struct ksz_device *dev, int port, int offset, + u32 mask, u32 val) +{ + return ksz_rmw32(dev, dev->dev_ops->get_port_addr(port, offset), + mask, val); } static inline void ksz_regmap_lock(void *__mtx) |