From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sergei Shtylyov Subject: Re: [PATCHv4 2/5] net: phy: extend fixed driver with fixed_phy_register() Date: Thu, 3 Sep 2015 22:37:32 +0300 Message-ID: <55E8A17C.5010401@cogentembedded.com> References: <1400249647-4643-1-git-send-email-thomas.petazzoni@free-electrons.com> <1400249647-4643-3-git-send-email-thomas.petazzoni@free-electrons.com> <55E89D83.1090401@cogentembedded.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Cc: Florian Fainelli , Tawfik Bayouk , Nadav Haklai , Lior Amsalem , Gregory Clement , Ezequiel Garcia , linux-arm-kernel@lists.infradead.org, Grant Likely , Rob Herring , Mark Rutland , Sascha Hauer , Christian Gmeiner To: Thomas Petazzoni , "David S. Miller" , netdev@vger.kernel.org, devicetree@vger.kernel.org Return-path: Received: from mail-lb0-f170.google.com ([209.85.217.170]:34581 "EHLO mail-lb0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755518AbbICThf (ORCPT ); Thu, 3 Sep 2015 15:37:35 -0400 Received: by lbbmp1 with SMTP id mp1so30528372lbb.1 for ; Thu, 03 Sep 2015 12:37:34 -0700 (PDT) In-Reply-To: <55E89D83.1090401@cogentembedded.com> Sender: netdev-owner@vger.kernel.org List-ID: 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 >> Acked-by: Florian Fainelli >> Acked-by: Grant Likely >> --- >> 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 From mboxrd@z Thu Jan 1 00:00:00 1970 From: sergei.shtylyov@cogentembedded.com (Sergei Shtylyov) Date: Thu, 3 Sep 2015 22:37:32 +0300 Subject: [PATCHv4 2/5] net: phy: extend fixed driver with fixed_phy_register() In-Reply-To: <55E89D83.1090401@cogentembedded.com> References: <1400249647-4643-1-git-send-email-thomas.petazzoni@free-electrons.com> <1400249647-4643-3-git-send-email-thomas.petazzoni@free-electrons.com> <55E89D83.1090401@cogentembedded.com> Message-ID: <55E8A17C.5010401@cogentembedded.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 >> Acked-by: Florian Fainelli >> Acked-by: Grant Likely >> --- >> 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