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net: phy: lxt: implement generic .handle_interrupt() callback 

In an attempt to actually support shared IRQs in phylib, we now move the
responsibility of triggering the phylib state machine or just returning
IRQ_NONE, based on the IRQ status register, to the PHY driver. Having
3 different IRQ handling callbacks (.handle_interrupt(),
.did_interrupt() and .ack_interrupt() ) is confusing so let the PHY
driver implement directly an IRQ handler like any other device driver.
Make this driver follow the new convention.

Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ioana Ciornei 2020-11-13 18:52:15 +02:00 committed by Jakub Kicinski
parent 1f6d0f267a
commit 01c4a00bf3
1 changed files with 50 additions and 0 deletions
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50
drivers/net/phy/lxt.c
View File

@ -37,6 +37,8 @@
#define MII_LXT970_ISR 18 /* Interrupt Status Register */
#define MII_LXT970_IRS_MINT BIT(15)
#define MII_LXT970_CONFIG 19 /* Configuration Register */
/* ------------------------------------------------------------------------- */
@ -47,6 +49,7 @@
#define MII_LXT971_IER_IEN 0x00f2
#define MII_LXT971_ISR 19 /* Interrupt Status Register */
#define MII_LXT971_ISR_MASK 0x00f0
/* register definitions for the 973 */
#define MII_LXT973_PCR 16 /* Port Configuration Register */
@ -81,6 +84,33 @@ static int lxt970_config_intr(struct phy_device *phydev)
return phy_write(phydev, MII_LXT970_IER, 0);
}
static irqreturn_t lxt970_handle_interrupt(struct phy_device *phydev)
{
int irq_status;
/* The interrupt status register is cleared by reading BMSR
* followed by MII_LXT970_ISR
*/
irq_status = phy_read(phydev, MII_BMSR);
if (irq_status < 0) {
phy_error(phydev);
return IRQ_NONE;
}
irq_status = phy_read(phydev, MII_LXT970_ISR);
if (irq_status < 0) {
phy_error(phydev);
return IRQ_NONE;
}
if (!(irq_status & MII_LXT970_IRS_MINT))
return IRQ_NONE;
phy_trigger_machine(phydev);
return IRQ_HANDLED;
}
static int lxt970_config_init(struct phy_device *phydev)
{
return phy_write(phydev, MII_LXT970_CONFIG, 0);
@ -105,6 +135,24 @@ static int lxt971_config_intr(struct phy_device *phydev)
return phy_write(phydev, MII_LXT971_IER, 0);
}
static irqreturn_t lxt971_handle_interrupt(struct phy_device *phydev)
{
int irq_status;
irq_status = phy_read(phydev, MII_LXT971_ISR);
if (irq_status < 0) {
phy_error(phydev);
return IRQ_NONE;
}
if (!(irq_status & MII_LXT971_ISR_MASK))
return IRQ_NONE;
phy_trigger_machine(phydev);
return IRQ_HANDLED;
}
/*
* A2 version of LXT973 chip has an ERRATA: it randomly return the contents
* of the previous even register when you read a odd register regularly
@ -239,6 +287,7 @@ static struct phy_driver lxt97x_driver[] = {
.config_init = lxt970_config_init,
.ack_interrupt = lxt970_ack_interrupt,
.config_intr = lxt970_config_intr,
.handle_interrupt = lxt970_handle_interrupt,
}, {
.phy_id = 0x001378e0,
.name = "LXT971",
@ -246,6 +295,7 @@ static struct phy_driver lxt97x_driver[] = {
/* PHY_BASIC_FEATURES */
.ack_interrupt = lxt971_ack_interrupt,
.config_intr = lxt971_config_intr,
.handle_interrupt = lxt971_handle_interrupt,
.suspend = genphy_suspend,
.resume = genphy_resume,
}, {