From mboxrd@z Thu Jan 1 00:00:00 1970 From: Manikanta Maddireddy Subject: [PATCH V3 5/7] PCI: tegra: Add loadable kernel module support Date: Fri, 1 Dec 2017 14:50:05 +0530 Message-ID: <1512120007-28088-6-git-send-email-mmaddireddy@nvidia.com> References: <1512120007-28088-1-git-send-email-mmaddireddy@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1512120007-28088-1-git-send-email-mmaddireddy-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: cyndis-/1wQRMveznE@public.gmane.org, thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, bhelgaas-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, lorenzo.pieralisi-5wv7dgnIgG8@public.gmane.org Cc: jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, frowand.list-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, rjw-LthD3rsA81gm4RdzfppkhA@public.gmane.org, tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org, vidyas-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org, kthota-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Manikanta Maddireddy List-Id: devicetree@vger.kernel.org Implement remove callback function for Tegra PCIe driver to add loadable kernel module support. Change PCI_TEGRA config to tristate to allow pci-tegra driver to be build as a module. Signed-off-by: Manikanta Maddireddy --- V2: * no change in this patch V3: * use tegra_pcie_debugfs_exit() helper function in tegra_pcie_debugfs_init() drivers/pci/host/Kconfig | 2 +- drivers/pci/host/pci-tegra.c | 34 +++++++++++++++++++++++++++++++--- 2 files changed, 32 insertions(+), 4 deletions(-) diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig index 38d12980db0f..6fd2a5937804 100644 --- a/drivers/pci/host/Kconfig +++ b/drivers/pci/host/Kconfig @@ -34,7 +34,7 @@ config PCI_FTPCI100 default ARCH_GEMINI config PCI_TEGRA - bool "NVIDIA Tegra PCIe controller" + tristate "NVIDIA Tegra PCIe controller" depends on ARCH_TEGRA help Say Y here if you want support for the PCIe host controller found diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c index 36795b34d996..2c13f43e8450 100644 --- a/drivers/pci/host/pci-tegra.c +++ b/drivers/pci/host/pci-tegra.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include #include @@ -2697,6 +2698,12 @@ static const struct file_operations tegra_pcie_ports_ops = { .release = seq_release, }; +static void tegra_pcie_debugfs_exit(struct tegra_pcie *pcie) +{ + debugfs_remove_recursive(pcie->debugfs); + pcie->debugfs = NULL; +} + static int tegra_pcie_debugfs_init(struct tegra_pcie *pcie) { struct dentry *file; @@ -2713,8 +2720,7 @@ static int tegra_pcie_debugfs_init(struct tegra_pcie *pcie) return 0; remove: - debugfs_remove_recursive(pcie->debugfs); - pcie->debugfs = NULL; + tegra_pcie_debugfs_exit(pcie); return -ENOMEM; } @@ -2732,6 +2738,7 @@ static int tegra_pcie_probe(struct platform_device *pdev) return -ENOMEM; pcie = pci_host_bridge_priv(host); + platform_set_drvdata(pdev, pcie); pcie->soc = of_device_get_match_data(dev); INIT_LIST_HEAD(&pcie->buses); @@ -2813,6 +2820,25 @@ static int tegra_pcie_probe(struct platform_device *pdev) return err; } +static int tegra_pcie_remove(struct platform_device *pdev) +{ + struct tegra_pcie *pcie = platform_get_drvdata(pdev); + struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie); + + if (IS_ENABLED(CONFIG_DEBUG_FS)) + tegra_pcie_debugfs_exit(pcie); + pci_stop_root_bus(host->bus); + pci_remove_root_bus(host->bus); + if (IS_ENABLED(CONFIG_PCI_MSI)) + tegra_pcie_disable_msi(pcie); + tegra_pcie_disable_ports(pcie); + tegra_pcie_free_resources(pcie); + tegra_pcie_disable_controller(pcie); + tegra_pcie_put_resources(pcie); + + return 0; +} + static struct platform_driver tegra_pcie_driver = { .driver = { .name = "tegra-pcie", @@ -2820,5 +2846,7 @@ static struct platform_driver tegra_pcie_driver = { .suppress_bind_attrs = true, }, .probe = tegra_pcie_probe, + .remove = tegra_pcie_remove, }; -builtin_platform_driver(tegra_pcie_driver); +module_platform_driver(tegra_pcie_driver); +MODULE_LICENSE("GPL"); -- 2.1.4