From: Sergei Shtylyov <sergei.shtylyov@cogentembedded•com>
To: Thomas Petazzoni <thomas.petazzoni@free-electrons•com>,
"David S. Miller" <davem@davemloft•net>,
netdev@vger•kernel.org, devicetree@vger•kernel.org
Cc: Florian Fainelli <florian@openwrt•org>,
Tawfik Bayouk <tawfik@marvell•com>,
Nadav Haklai <nadavh@marvell•com>,
Lior Amsalem <alior@marvell•com>,
Gregory Clement <gregory.clement@free-electrons•com>,
Ezequiel Garcia <ezequiel.garcia@free-electrons•com>,
linux-arm-kernel@lists•infradead.org,
Grant Likely <grant.likely@secretlab•ca>,
Rob Herring <robh+dt@kernel•org>,
Mark Rutland <mark.rutland@arm•com>,
Sascha Hauer <s.hauer@pengutronix•de>,
Christian Gmeiner <christian.gmeiner@gmail•com>
Subject: Re: [PATCHv4 2/5] net: phy: extend fixed driver with fixed_phy_register()
Date: Thu, 3 Sep 2015 22:37:32 +0300 [thread overview]
Message-ID: <55E8A17C.5010401@cogentembedded.com> (raw)
In-Reply-To: <55E89D83.1090401@cogentembedded.com>
On 09/03/2015 10:20 PM, Sergei Shtylyov 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'
Sorry, s/phy/irq/ of course. Just noticed. :-/
> 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 19:37 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
2015-09-03 19:23 ` Florian Fainelli
2015-09-03 19:35 ` Sergei Shtylyov
2015-09-03 19:37 ` Sergei Shtylyov [this message]
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
[not found] ` <1400249647-4643-4-git-send-email-thomas.petazzoni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
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
[not found] ` <1400249647-4643-1-git-send-email-thomas.petazzoni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
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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