> -----Original Message-----
> From: Nicolas Ferre [mailto:nicolas.fe...@atmel.com]
> Sent: Tuesday, March 31, 2015 6:32 PM
> To: linux-arm-ker...@lists.infradead.org; net...@vger.kernel.org; David S.
> Miller
> Cc: linux-kernel@vger.kernel.org; Boris BREZILLON; Cyrille Pitchen; Alexandre
> Belloni; Michal Simek; Punnaiah Choudary Kalluri; Nicolas Ferre
> Subject: [PATCH v2 8/8] net/macb: unify peripheral version testing
>
> As we need to check peripheral version from the hardware during probe, I
> introduce a little helper to unify these tests. It would prevent to
> de-synchronize the test like previously observed.
>
> Signed-off-by: Nicolas Ferre <nicolas.fe...@atmel.com>
Reviewed-by: Punnaiah Choudary Kalluri <punn...@xilinx.com>
> ---
>
> Changes in v2: None
>
> drivers/net/ethernet/cadence/macb.c | 7 ++-----
> drivers/net/ethernet/cadence/macb.h | 5 +++++
> 2 files changed, 7 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/net/ethernet/cadence/macb.c
> b/drivers/net/ethernet/cadence/macb.c
> index 4412895cf4a8..448a32309dd0 100644
> --- a/drivers/net/ethernet/cadence/macb.c
> +++ b/drivers/net/ethernet/cadence/macb.c
> @@ -2139,10 +2139,9 @@ static void macb_configure_caps(struct macb *bp,
> const struct macb_config *dt_co
> if (dt_conf)
> bp->caps = dt_conf->caps;
>
> - if (MACB_BFEXT(IDNUM, macb_readl(bp, MID)) >= 0x2)
> + if (macb_is_gem_hw(bp->regs)) {
> bp->caps |= MACB_CAPS_MACB_IS_GEM;
>
> - if (macb_is_gem(bp)) {
> dcfg = gem_readl(bp, DCFG1);
> if (GEM_BFEXT(IRQCOR, dcfg) == 0)
> bp->caps |= MACB_CAPS_ISR_CLEAR_ON_WRITE;
> @@ -2159,7 +2158,6 @@ static void macb_probe_queues(void __iomem
> *mem,
> unsigned int *num_queues)
> {
> unsigned int hw_q;
> - u32 mid;
>
> *queue_mask = 0x1;
> *num_queues = 1;
> @@ -2170,8 +2168,7 @@ static void macb_probe_queues(void __iomem
> *mem,
> * we are early in the probe process and don't have the
> * MACB_CAPS_MACB_IS_GEM flag positioned
> */
> - mid = readl_relaxed(mem + MACB_MID);
> - if (MACB_BFEXT(IDNUM, mid) < 0x2)
> + if (!macb_is_gem_hw(mem))
> return;
>
> /* bit 0 is never set but queue 0 always exists */
> diff --git a/drivers/net/ethernet/cadence/macb.h
> b/drivers/net/ethernet/cadence/macb.h
> index fd0a22157a88..eb7d76f7bf6a 100644
> --- a/drivers/net/ethernet/cadence/macb.h
> +++ b/drivers/net/ethernet/cadence/macb.h
> @@ -833,4 +833,9 @@ static inline bool macb_is_gem(struct macb *bp)
> return !!(bp->caps & MACB_CAPS_MACB_IS_GEM);
> }
>
> +static inline bool macb_is_gem_hw(void __iomem *addr)
> +{
> + return !!(MACB_BFEXT(IDNUM, readl_relaxed(addr + MACB_MID))
> >= 0x2);
> +}
> +
> #endif /* _MACB_H */
> --
> 2.1.3
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