Re: [PATCH v2] net: phy: air_en8811h: add AN8811HB MCU assert/deassert support

On 3/27/26 5:41 AM, Eric Woudstra wrote:

static int __air_pbus_reg_write(struct mdio_device *mdio, u32 pbus_address,
				u32 pbus_data)
{
	int ret;

	ret = __mdiobus_write(mdio->bus, mdio->addr, AIR_EXT_PAGE_ACCESS,
			      (u16)(pbus_address >> 6));
	if (ret < 0)
		return ret;

	ret = __mdiobus_write(mdio->bus, mdio->addr, (pbus_address >> 2) & 0xf,
			      (u16)pbus_data);
	if (ret < 0)
		return ret;

	ret = __mdiobus_write(mdio->bus, mdio->addr, AIR_PBUS_DATA_HIGH,
			      (u16)(pbus_data >> 16));
	if (ret < 0)
		return ret;

	return 0;
}

static int air_pbus_reg_write(struct mdio_device *mdio, u32 pbus_address,
			      u32 pbus_data)
{
	int ret;

	mutex_lock(&mdio->bus->mdio_lock);

	ret = __air_pbus_reg_write(mdio, pbus_address, pbus_data);
	if (ret < 0)
		dev_err(&mdio->dev, "%s 0x%08x failed: %d\n", __func__,
			pbus_address, ret);

	mutex_unlock(&mdio->bus->mdio_lock);

	return ret;
}

static int __air_pbus_reg_read(struct mdio_device *mdio, u32 pbus_address,
			       u32 *pbus_data)
{
	int ret, pbus_data_low;

	ret = __mdiobus_write(mdio->bus, mdio->addr, AIR_EXT_PAGE_ACCESS,
			      (u16)(pbus_address >> 6));
	if (ret < 0)
		return ret;

	ret = __mdiobus_read(mdio->bus, mdio->addr, (pbus_address >> 2) & 0xf);
	if (ret < 0)
		return ret;
	pbus_data_low = ret;

	ret = __mdiobus_read(mdio->bus, mdio->addr, AIR_PBUS_DATA_HIGH);
	if (ret < 0)
		return ret;

	*pbus_data = (ret << 16) + pbus_data_low;

	return 0;
}

static int air_pbus_reg_read(struct mdio_device *mdio, u32 pbus_address,
			     u32 *pbus_data)
{
	int ret;

	mutex_lock(&mdio->bus->mdio_lock);

	ret = __air_pbus_reg_read(mdio, pbus_address, pbus_data);
	if (ret < 0)
		dev_err(&mdio->dev, "%s 0x%08x failed: %d\n", __func__,
			pbus_address, ret);

	mutex_unlock(&mdio->bus->mdio_lock);

	return ret;
}

With:

#define AIR_PBUS_DATA_HIGH		0x10

Small correction using upper_16_bits() and lower_16_bits():

static int __air_pbus_reg_write(struct mdio_device *mdio, u32 pbus_address,
				u32 pbus_data)
{
	int ret;

	ret = __mdiobus_write(mdio->bus, mdio->addr, AIR_EXT_PAGE_ACCESS,
			      (u16)(pbus_address >> 6));
	if (ret < 0)
		return ret;

	ret = __mdiobus_write(mdio->bus, mdio->addr, (pbus_address >> 2) & 0xf,
			      lower_16_bits(pbus_data));
	if (ret < 0)
		return ret;

	ret = __mdiobus_write(mdio->bus, mdio->addr, AIR_PBUS_DATA_HIGH,
			      upper_16_bits(pbus_data));
	if (ret < 0)
		return ret;

	return 0;
}

static int air_pbus_reg_write(struct mdio_device *mdio, u32 pbus_address,
			      u32 pbus_data)
{
	int ret;

	mutex_lock(&mdio->bus->mdio_lock);

	ret = __air_pbus_reg_write(mdio, pbus_address, pbus_data);
	if (ret < 0)
		dev_err(&mdio->dev, "%s 0x%08x failed: %d\n", __func__,
			pbus_address, ret);

	mutex_unlock(&mdio->bus->mdio_lock);

	return ret;
}