From mboxrd@z Thu Jan 1 00:00:00 1970 From: kishon@ti.com (Kishon Vijay Abraham I) Date: Tue, 6 May 2014 19:04:02 +0530 Subject: [TEMP PATCH 16/17] pci: host: pcie-dra7xx: use reset framework APIs to reset PCIe In-Reply-To: <1399383244-14556-1-git-send-email-kishon@ti.com> References: <1399383244-14556-1-git-send-email-kishon@ti.com> Message-ID: <1399383244-14556-17-git-send-email-kishon@ti.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Get reset nodes from dt and use reset framework APIs to reset PCIe. This is needed since reset is handled by the SoC. Cc: Dan Murphy Signed-off-by: Kishon Vijay Abraham I --- Documentation/devicetree/bindings/pci/ti-pci.txt | 2 ++ drivers/pci/host/pci-dra7xx.c | 10 ++++++++++ 2 files changed, 12 insertions(+) diff --git a/Documentation/devicetree/bindings/pci/ti-pci.txt b/Documentation/devicetree/bindings/pci/ti-pci.txt index 6cb6f09..cfb95c0 100644 --- a/Documentation/devicetree/bindings/pci/ti-pci.txt +++ b/Documentation/devicetree/bindings/pci/ti-pci.txt @@ -9,6 +9,8 @@ This node should have the properties described in "designware-pcie.txt". - phys : the phandle for the PHY device (used by generic PHY framework) - phy-names : the names of the PHY corresponding to the PHYs present in the *phy* phandle. + - resets: phandle used if reset is handled be soc + - reset-names: name given to the phandle Example: pcie at 51000000 { diff --git a/drivers/pci/host/pci-dra7xx.c b/drivers/pci/host/pci-dra7xx.c index a37c25c..17d64ee 100644 --- a/drivers/pci/host/pci-dra7xx.c +++ b/drivers/pci/host/pci-dra7xx.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include "pcie-designware.h" @@ -281,6 +282,7 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev) struct resource *res; struct dra7xx_pcie *dra7xx; struct device *dev = &pdev->dev; + struct reset_control *rstc; dra7xx = devm_kzalloc(&pdev->dev, sizeof(*dra7xx), GFP_KERNEL); if (!dra7xx) @@ -304,6 +306,14 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev) if (!base) return -ENOMEM; + rstc = devm_reset_control_get(dev, "reset"); + if (IS_ERR(rstc)) + return PTR_ERR(rstc); + + ret = reset_control_deassert(rstc); + if (ret) + return ret; + phy = devm_phy_get(dev, "pcie-phy"); if (IS_ERR(phy)) return PTR_ERR(phy); -- 1.7.9.5