From patchwork Fri Mar 21 06:52:48 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nishanth Menon X-Patchwork-Id: 332489 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 9C8CE2C00AF for ; Fri, 21 Mar 2014 17:53:42 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754635AbaCUGxe (ORCPT ); Fri, 21 Mar 2014 02:53:34 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:55923 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753889AbaCUGxd (ORCPT ); Fri, 21 Mar 2014 02:53:33 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id s2L6qqjg017807; Fri, 21 Mar 2014 01:52:52 -0500 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id s2L6qq1a010879; Fri, 21 Mar 2014 01:52:52 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DFLE72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.3.174.1; Fri, 21 Mar 2014 01:52:52 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id s2L6qqFq006266; Fri, 21 Mar 2014 01:52:52 -0500 From: Nishanth Menon To: "David S. Miller" CC: Russell King , Markus Pargmann , Tony Lindgren , , , , , Nishanth Menon Subject: [PATCH] net: micrel : ks8851-ml: add vdd-supply support Date: Fri, 21 Mar 2014 01:52:48 -0500 Message-ID: <1395384768-8461-1-git-send-email-nm@ti.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Few platforms use external regulator to keep the ethernet MAC supplied. So, request and enable the regulator for driver functionality. Fixes: 66fda75f47dc (regulator: core: Replace direct ops->disable usage) Reported-by: Russell King Suggested-by: Markus Pargmann Signed-off-by: Nishanth Menon --- This fixes a regression in SDP4430 platform as reported by Russel here: http://marc.info/?t=139509918200014&r=1&w=2 Patch is based on [v3.14-rc7] tag, if it is too late to submit, I can repost rebased to git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git .../devicetree/bindings/net/micrel-ks8851.txt | 1 + drivers/net/ethernet/micrel/ks8851.c | 30 +++++++++++++++++++- 2 files changed, 30 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/net/micrel-ks8851.txt b/Documentation/devicetree/bindings/net/micrel-ks8851.txt index 11ace3c..4fc3927 100644 --- a/Documentation/devicetree/bindings/net/micrel-ks8851.txt +++ b/Documentation/devicetree/bindings/net/micrel-ks8851.txt @@ -7,3 +7,4 @@ Required properties: Optional properties: - local-mac-address : Ethernet mac address to use +- vdd-supply: supply for Ethernet mac diff --git a/drivers/net/ethernet/micrel/ks8851.c b/drivers/net/ethernet/micrel/ks8851.c index 727b546a..e0c92e0 100644 --- a/drivers/net/ethernet/micrel/ks8851.c +++ b/drivers/net/ethernet/micrel/ks8851.c @@ -23,6 +23,7 @@ #include #include #include +#include #include @@ -83,6 +84,7 @@ union ks8851_tx_hdr { * @rc_rxqcr: Cached copy of KS_RXQCR. * @eeprom_size: Companion eeprom size in Bytes, 0 if no eeprom * @eeprom: 93CX6 EEPROM state for accessing on-board EEPROM. + * @vdd_reg: Optional regulator supplying the chip * * The @lock ensures that the chip is protected when certain operations are * in progress. When the read or write packet transfer is in progress, most @@ -130,6 +132,7 @@ struct ks8851_net { struct spi_transfer spi_xfer2[2]; struct eeprom_93cx6 eeprom; + struct regulator *vdd_reg; }; static int msg_enable; @@ -1414,6 +1417,21 @@ static int ks8851_probe(struct spi_device *spi) ks->spidev = spi; ks->tx_space = 6144; + ks->vdd_reg = regulator_get_optional(&spi->dev, "vdd"); + if (IS_ERR(ks->vdd_reg)) { + ret = PTR_ERR(ks->vdd_reg); + if (ret == -EPROBE_DEFER) + goto err_reg; + } else { + ret = regulator_enable(ks->vdd_reg); + if (ret) { + dev_err(&spi->dev, "regulator enable fail: %d\n", + ret); + goto err_reg_en; + } + } + + mutex_init(&ks->lock); spin_lock_init(&ks->statelock); @@ -1508,8 +1526,14 @@ static int ks8851_probe(struct spi_device *spi) err_netdev: free_irq(ndev->irq, ks); -err_id: err_irq: +err_id: + if (!IS_ERR(ks->vdd_reg)) + regulator_disable(ks->vdd_reg); +err_reg_en: + if (!IS_ERR(ks->vdd_reg)) + regulator_put(ks->vdd_reg); +err_reg: free_netdev(ndev); return ret; } @@ -1523,6 +1547,10 @@ static int ks8851_remove(struct spi_device *spi) unregister_netdev(priv->netdev); free_irq(spi->irq, priv); + if (!IS_ERR(priv->vdd_reg)) { + regulator_disable(priv->vdd_reg); + regulator_put(priv->vdd_reg); + } free_netdev(priv->netdev); return 0;