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ag71xx: replace fixed PHY reset wait time in ar7240sw_setup 

Replace the fixed wait time of 1s with polling for BMCR_RESET
to be cleared on all PHYs.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>

SVN-Revision: 43538
owl
John Crispin 2014-12-07 16:52:58 +00:00
parent 951866a8eb
commit 4caa8d50ad
1 changed files with 28 additions and 1 deletions
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29
target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_ar7240.c
View File

@ -618,6 +618,31 @@ static void ar7240sw_setup(struct ar7240sw *as)
ar7240sw_reg_rmw(mii, AR7240_REG_SERVICE_TAG, AR7240_SERVICE_TAG_M, 0);
}
/* inspired by phy_poll_reset in drivers/net/phy/phy_device.c */
static int
ar7240sw_phy_poll_reset(struct mii_bus *bus)
{
const unsigned int sleep_msecs = 20;
int ret, elapsed, i;
for (elapsed = sleep_msecs; elapsed <= 600;
elapsed += sleep_msecs) {
msleep(sleep_msecs);
for (i = 0; i < AR7240_NUM_PHYS; i++) {
ret = ar7240sw_phy_read(bus, i, MII_BMCR);
if (ret < 0)
return ret;
if (ret & BMCR_RESET)
break;
if (i == AR7240_NUM_PHYS - 1) {
usleep_range(1000, 2000);
return 0;
}
}
}
return -ETIMEDOUT;
}
static int ar7240sw_reset(struct ar7240sw *as)
{
struct mii_bus *mii = as->mii_bus;
@ -646,7 +671,9 @@ static int ar7240sw_reset(struct ar7240sw *as)
ar7240sw_phy_write(mii, i, MII_BMCR,
BMCR_RESET | BMCR_ANENABLE);
}
msleep(1000);
ret = ar7240sw_phy_poll_reset(mii);
if (ret)
return ret;
ar7240sw_setup(as);
return ret;