From: sergei.shtylyov@cogentembedded•com (Sergei Shtylyov)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCHv4 2/5] net: phy: extend fixed driver with fixed_phy_register()
Date: Thu, 3 Sep 2015 22:20:35 +0300 [thread overview]
Message-ID: <55E89D83.1090401@cogentembedded.com> (raw)
In-Reply-To: <1400249647-4643-3-git-send-email-thomas.petazzoni@free-electrons.com>
Hello.
On 05/16/2014 06:14 PM, Thomas Petazzoni wrote:
> The existing fixed_phy_add() function has several drawbacks that
> prevents it from being used as is for OF-based declaration of fixed
> PHYs:
>
> * The address of the PHY on the fake bus needs to be passed, while a
> dynamic allocation is desired.
>
> * Since the phy_device instantiation is post-poned until the next
> mdiobus scan, there is no way to associate the fixed PHY with its
> OF node, which later prevents of_phy_connect() from finding this
> fixed PHY from a given OF node.
>
> To solve this, this commit introduces fixed_phy_register(), which will
> allocate an available PHY address, add the PHY using fixed_phy_add()
> and instantiate the phy_device structure associated with the provided
> OF node.
>
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons•com>
> Acked-by: Florian Fainelli <f.fainelli@gmail•com>
> Acked-by: Grant Likely <grant.likely@linaro•org>
> ---
> drivers/net/phy/fixed.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++
> include/linux/phy_fixed.h | 11 +++++++++
> 2 files changed, 72 insertions(+)
>
> diff --git a/drivers/net/phy/fixed.c b/drivers/net/phy/fixed.c
> index e41546d..d60d875 100644
> --- a/drivers/net/phy/fixed.c
> +++ b/drivers/net/phy/fixed.c
[...]
> @@ -203,6 +204,66 @@ err_regs:
[...]
> +int fixed_phy_register(unsigned int irq,
> + struct fixed_phy_status *status,
> + struct device_node *np)
> +{
> + struct fixed_mdio_bus *fmb = &platform_fmb;
> + struct phy_device *phy;
> + int phy_addr;
> + int ret;
> +
> + /* Get the next available PHY address, up to PHY_MAX_ADDR */
> + spin_lock(&phy_fixed_addr_lock);
> + if (phy_fixed_addr == PHY_MAX_ADDR) {
> + spin_unlock(&phy_fixed_addr_lock);
> + return -ENOSPC;
> + }
> + phy_addr = phy_fixed_addr++;
> + spin_unlock(&phy_fixed_addr_lock);
> +
> + ret = fixed_phy_add(PHY_POLL, phy_addr, status);
Was rummaging in the fixed_phy driver and a bug sprang right at me: 'phy'
should have been passed here, not PHY_POLL. Luckily, all callers pass PHY_POLL
anyway...
[...]
MBR, Sergei
next prev parent reply other threads:[~2015-09-03 19:20 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-16 14:14 [PATCHv4 0/5] Add DT support for fixed PHYs Thomas Petazzoni
2014-05-16 14:14 ` [PATCHv4 1/5] net: phy: decouple PHY id and PHY address in fixed PHY driver Thomas Petazzoni
2014-05-16 18:30 ` Florian Fainelli
2014-05-16 14:14 ` [PATCHv4 2/5] net: phy: extend fixed driver with fixed_phy_register() Thomas Petazzoni
2014-05-16 18:28 ` Florian Fainelli
2015-09-03 19:20 ` Sergei Shtylyov [this message]
2015-09-03 19:23 ` Florian Fainelli
2015-09-03 19:35 ` Sergei Shtylyov
2015-09-03 19:37 ` Sergei Shtylyov
2015-09-03 19:38 ` Florian Fainelli
2015-09-03 19:55 ` Sergei Shtylyov
2014-05-16 14:14 ` [PATCHv4 3/5] of: provide a binding for fixed link PHYs Thomas Petazzoni
2014-05-16 18:29 ` Florian Fainelli
2014-05-16 14:14 ` [PATCHv4 4/5] net: mvneta: add support for fixed links Thomas Petazzoni
2014-05-16 14:14 ` [PATCHv4 5/5] ARM: mvebu: use the fixed-link PHY DT binding for the Armada XP Matrix board Thomas Petazzoni
2014-05-16 18:27 ` [PATCHv4 0/5] Add DT support for fixed PHYs Florian Fainelli
2014-05-16 20:46 ` Thomas Petazzoni
2014-05-16 21:20 ` David Miller
2014-05-18 10:18 ` Thomas Petazzoni
2014-05-18 17:21 ` Florian Fainelli
2014-05-18 17:46 ` Thomas Petazzoni
2014-05-18 23:07 ` Jason Cooper
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