On Mon, Oct 14, 2019 at 9:27 AM Florin Chiculita
<florinlaurentiu.chicul...@nxp.com> wrote:
>
> Aquantia quad-phys may take longer to initialize. This commit adds
> a polling mechanism for a global alarm bit that tells if phy init
> sequence is completed.
>
> Signed-off-by: Florin Chiculita <florinlaurentiu.chicul...@nxp.com>
Acked-by: Joe Hershberger <joe.hershber...@ni.com>
> ---
> drivers/net/phy/aquantia.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/drivers/net/phy/aquantia.c b/drivers/net/phy/aquantia.c
> index 465ec2d..ae3112c 100644
> --- a/drivers/net/phy/aquantia.c
> +++ b/drivers/net/phy/aquantia.c
> @@ -37,6 +37,9 @@
> #define GLOBAL_FAULT 0xc850
> #define GLOBAL_RSTATUS_1 0xc885
>
> +#define GLOBAL_ALARM_1 0xcc00
> +#define SYSTEM_READY_BIT 0x40
> +
> #define GLOBAL_STANDARD_CONTROL 0x0
> #define SOFT_RESET BIT(15)
> #define LOW_POWER BIT(11)
> @@ -258,6 +261,17 @@ int aquantia_config(struct phy_device *phydev)
> {
> u32 val, id, rstatus, fault;
> u32 reg_val1 = 0;
> + int num_retries = 5;
> +
> + /* check if the system is out of reset and init sequence completed.
I'll be fixing up this comment format.
> + * chip-wide reset for gen1 quad phys takes longer
> + */
> + while (--num_retries) {
> + rstatus = phy_read(phydev, MDIO_MMD_VEND1, GLOBAL_ALARM_1);
> + if (rstatus & SYSTEM_READY_BIT)
> + break;
> + mdelay(10);
> + }
>
> id = phy_read(phydev, MDIO_MMD_VEND1, GLOBAL_FIRMWARE_ID);
> rstatus = phy_read(phydev, MDIO_MMD_VEND1, GLOBAL_RSTATUS_1);
> --
> 1.9.3
>
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