Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752449AbbBEVx7 (ORCPT ); Thu, 5 Feb 2015 16:53:59 -0500 Received: from comal.ext.ti.com ([198.47.26.152]:57082 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751570AbbBEVx4 (ORCPT ); Thu, 5 Feb 2015 16:53:56 -0500 From: Murali Karicheri To: , , , , CC: Murali Karicheri , Joerg Roedel , Grant Likely , Will Deacon , Russell King , Arnd Bergmann , Suravee Suthikulpanit Subject: [PATCH v6 5/7] of/pci: add of_pci_dma_configure() update dma configuration Date: Thu, 5 Feb 2015 16:52:57 -0500 Message-ID: <1423173179-10227-6-git-send-email-m-karicheri2@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1423173179-10227-1-git-send-email-m-karicheri2@ti.com> References: <1423173179-10227-1-git-send-email-m-karicheri2@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2816 Lines: 88 Add of_pci_dma_configure() to allow updating the dma configuration of the pci device using the configuration from DT of the parent of the root bridge device. Use the newly added APIs pci_get/put_host_bridge_device() for implementing this. Cc: Joerg Roedel Cc: Grant Likely Cc: Will Deacon Cc: Russell King Cc: Arnd Bergmann Cc: Suravee Suthikulpanit Acked-by: Bjorn Helgaas Acked-by: Rob Herring Signed-off-by: Murali Karicheri --- drivers/of/of_pci.c | 19 +++++++++++++++++++ include/linux/of_pci.h | 5 +++++ 2 files changed, 24 insertions(+) diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c index 88471d3..0f1dd0b 100644 --- a/drivers/of/of_pci.c +++ b/drivers/of/of_pci.c @@ -2,6 +2,7 @@ #include #include #include +#include #include #include @@ -229,6 +230,24 @@ parse_failed: return err; } EXPORT_SYMBOL_GPL(of_pci_get_host_bridge_resources); + +/** + * of_pci_dma_configure - Setup DMA configuration + * @dev: ptr to pci_dev struct of the pci device + * + * Function to update PCI devices's DMA configuration using the same + * info from the OF node of root host bridge's parent. + */ +void of_pci_dma_configure(struct pci_dev *pci_dev) +{ + struct device *dev = &pci_dev->dev; + struct device *bridge = pci_get_host_bridge_device(pci_dev); + + of_dma_configure(dev, bridge->parent->of_node); + pci_put_host_bridge_device(bridge); +} +EXPORT_SYMBOL_GPL(of_pci_dma_configure); + #endif /* CONFIG_OF_ADDRESS */ #ifdef CONFIG_PCI_MSI diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h index ce0e5ab..8f1741f 100644 --- a/include/linux/of_pci.h +++ b/include/linux/of_pci.h @@ -16,6 +16,7 @@ int of_pci_get_devfn(struct device_node *np); int of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin); int of_pci_parse_bus_range(struct device_node *node, struct resource *res); int of_get_pci_domain_nr(struct device_node *node); +void of_pci_dma_configure(struct pci_dev *pci_dev); #else static inline int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq) { @@ -50,6 +51,10 @@ of_get_pci_domain_nr(struct device_node *node) { return -1; } + +static inline void of_pci_dma_configure(struct pci_dev *pci_dev) +{ +} #endif #if defined(CONFIG_OF_ADDRESS) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/