On 28.05.2019 21:31, Marek Vasut wrote:
> On 5/28/19 9:28 PM, Heiner Kallweit wrote:
>> On 28.05.2019 21:23, Marek Vasut wrote:
>>> Add support for handling the TJA11xx PHY IRQ signal.
>>>
>>> Signed-off-by: Marek Vasut <ma...@denx.de>
>>> Cc: Andrew Lunn <and...@lunn.ch>
>>> Cc: Florian Fainelli <f.faine...@gmail.com>
>>> Cc: Guenter Roeck <li...@roeck-us.net>
>>> Cc: Heiner Kallweit <hkallwe...@gmail.com>
>>> Cc: Jean Delvare <jdelv...@suse.com>
>>> Cc: linux-hwmon@vger.kernel.org
>>> ---
>>> V2: - Define each bit of the MII_INTEN register and a mask
>>> - Drop IRQ acking from tja11xx_config_intr()
>>> ---
>>> drivers/net/phy/nxp-tja11xx.c | 48 +++++++++++++++++++++++++++++++++++
>>> 1 file changed, 48 insertions(+)
>>>
>>> diff --git a/drivers/net/phy/nxp-tja11xx.c b/drivers/net/phy/nxp-tja11xx.c
>>> index b705d0bd798b..b41af609607d 100644
>>> --- a/drivers/net/phy/nxp-tja11xx.c
>>> +++ b/drivers/net/phy/nxp-tja11xx.c
>>> @@ -40,6 +40,29 @@
>>> #define MII_INTSRC_TEMP_ERR BIT(1)
>>> #define MII_INTSRC_UV_ERR BIT(3)
>>>
>>> +#define MII_INTEN 22
>>> +#define MII_INTEN_PWON_EN BIT(15)
>>> +#define MII_INTEN_WAKEUP_EN BIT(14)
>>> +#define MII_INTEN_PHY_INIT_FAIL_EN BIT(11)
>>> +#define MII_INTEN_LINK_STATUS_FAIL_EN BIT(10)
>>> +#define MII_INTEN_LINK_STATUS_UP_EN BIT(9)
>>> +#define MII_INTEN_SYM_ERR_EN BIT(8)
>>> +#define MII_INTEN_TRAINING_FAILED_EN BIT(7)
>>> +#define MII_INTEN_SQI_WARNING_EN BIT(6)
>>> +#define MII_INTEN_CONTROL_ERR_EN BIT(5)
>>> +#define MII_INTEN_UV_ERR_EN BIT(3)
>>> +#define MII_INTEN_UV_RECOVERY_EN BIT(2)
>>> +#define MII_INTEN_TEMP_ERR_EN BIT(1)
>>> +#define MII_INTEN_SLEEP_ABORT_EN BIT(0)
>>> +#define MII_INTEN_MASK
>>> \
>>> + (MII_INTEN_PWON_EN | MII_INTEN_WAKEUP_EN | \
>>> + MII_INTEN_PHY_INIT_FAIL_EN | MII_INTEN_LINK_STATUS_FAIL_EN | \
>>> + MII_INTEN_LINK_STATUS_UP_EN | MII_INTEN_SYM_ERR_EN | \
>>> + MII_INTEN_TRAINING_FAILED_EN | MII_INTEN_SQI_WARNING_EN | \
>>> + MII_INTEN_CONTROL_ERR_EN | MII_INTEN_UV_ERR_EN | \
>>> + MII_INTEN_UV_RECOVERY_EN | MII_INTEN_TEMP_ERR_EN | \
>>> + MII_INTEN_SLEEP_ABORT_EN)
>>
>> Why do you enable all these interrupt sources? As I said, phylib needs
>> link change info only.
>
> Because I need them to reliably detect that the link state changed.
>
Hmm, e.g. this one MII_INTEN_TEMP_ERR_EN doesn't seem to be related
to a link status change. Name sounds like it just reports exceeding
a temperature threshold.
>>> +
>>> #define MII_COMMSTAT 23
>>> #define MII_COMMSTAT_LINK_UP BIT(15)
>>>
>>> @@ -239,6 +262,25 @@ static int tja11xx_read_status(struct phy_device
>>> *phydev)
>>> return 0;
>>> }
>>>
>>> +static int tja11xx_config_intr(struct phy_device *phydev)
>>> +{
>>> + int ret;
>>> +
>>> + if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
>>> + ret = phy_write(phydev, MII_INTEN, MII_INTEN_MASK);
>>> + else
>>> + ret = phy_write(phydev, MII_INTEN, 0);
>>> +
>>> + return ret < 0 ? ret : 0;
>>
>> phy_write returns only 0 or negative errno. You don't need
>> variable ret.
>
> OK
>
