From patchwork Sat Oct 24 12:14:07 2020
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From: Ioana Ciornei <ioana.ciornei@nxp.com>
To: Andrew Lunn <andrew@lunn.ch>, Heiner Kallweit <hkallweit1@gmail.com>,
 Russell King <linux@armlinux.org.uk>,
 Jakub Kicinski <kuba@kernel.org>, netdev@vger.kernel.org,
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Cc: Ioana Ciornei <ioana.ciornei@nxp.com>,
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 Andre Edich <andre.edich@microchip.com>,
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 Yuiko Oshino <yuiko.oshino@microchip.com>
Subject: [RFC net-next 0/5] net: phy: add support for shared interrupts
Date: Sat, 24 Oct 2020 15:14:07 +0300
Message-Id: <20201024121412.10070-1-ioana.ciornei@nxp.com>
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This patch set aims to actually add support for shared interrupts in
phylib and not only for multi-PHY devices. While we are at it,
streamline the interrupt handling in phylib.

For a bit of context, at the moment, there are multiple phy_driver ops
that deal with this subject:

- .config_intr() - Enable/disable the interrupt line.

- .ack_interrupt() - Should quiesce any interrupts that may have been
  fired.  It's also used by phylib in conjunction with .config_intr() to
  clear any pending interrupts after the line was disabled, and before
  it is going to be enabled.

- .did_interrupt() - Intended for multi-PHY devices with a shared IRQ
  line and used by phylib to discern which PHY from the package was the
  one that actually fired the interrupt.

- .handle_interrupt() - Completely overrides the default interrupt
  handling logic from phylib. The PHY driver is responsible for checking
  if any interrupt was fired by the respective PHY and choose
  accordingly if it's the one that should trigger the link state machine.