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authorKevin Hilman <khilman@linaro.org>2013-08-21 10:16:55 -0700
committerKevin Hilman <khilman@linaro.org>2013-08-21 10:17:18 -0700
commitbfa664f21b0357f2ad9cdf519f594ece36ec8f64 (patch)
treef377028eba58633d917d65c1141977b2e8ca9529 /drivers/of
parent5515d9981f5f30e82d096921f86ba016911c9ea8 (diff)
parentb4f173752a56187bd55752b0474429202f2ab1d3 (diff)
Merge tag 'tegra-for-3.12-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into next/soc
From: Stephen Warren: ARM: tegra: core SoC enhancements for 3.12 This branch includes a number of enhancements to core SoC support for Tegra devices. The major new features are: * Adds a new CPU-power-gated cpuidle state for Tegra114. * Adds initial system suspend support for Tegra114, initially supporting just CPU-power-gating during suspend. * Adds "LP1" suspend mode support for all of Tegra20/30/114. This mode both gates CPU power, and places the DRAM into self-refresh mode. * A new DT-driven PCIe driver to Tegra20/30. The driver is also moved from arch/arm/mach-tegra/ to drivers/pci/host/. The PCIe driver work depends on the following tag from Thomas Petazzoni: git://git.infradead.org/linux-mvebu.git mis-3.12.2 ... which is merged into the middle of this pull request. * tag 'tegra-for-3.12-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra: (33 commits) ARM: tegra: disable LP2 cpuidle state if PCIe is enabled MAINTAINERS: Add myself as Tegra PCIe maintainer PCI: tegra: set up PADS_REFCLK_CFG1 PCI: tegra: Add Tegra 30 PCIe support PCI: tegra: Move PCIe driver to drivers/pci/host PCI: msi: add default MSI operations for !HAVE_GENERIC_HARDIRQS platforms ARM: tegra: add LP1 suspend support for Tegra114 ARM: tegra: add LP1 suspend support for Tegra20 ARM: tegra: add LP1 suspend support for Tegra30 ARM: tegra: add common LP1 suspend support clk: tegra114: add LP1 suspend/resume support ARM: tegra: config the polarity of the request of sys clock ARM: tegra: add common resume handling code for LP1 resuming ARM: pci: add ->add_bus() and ->remove_bus() hooks to hw_pci of: pci: add registry of MSI chips PCI: Introduce new MSI chip infrastructure PCI: remove ARCH_SUPPORTS_MSI kconfig option PCI: use weak functions for MSI arch-specific functions ARM: tegra: unify Tegra's Kconfig a bit more ARM: tegra: remove the limitation that Tegra114 can't support suspend ... Signed-off-by: Kevin Hilman <khilman@linaro.org>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/of_pci.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
index 42c687a820a..e5ca00893c0 100644
--- a/drivers/of/of_pci.c
+++ b/drivers/of/of_pci.c
@@ -89,3 +89,48 @@ int of_pci_parse_bus_range(struct device_node *node, struct resource *res)
return 0;
}
EXPORT_SYMBOL_GPL(of_pci_parse_bus_range);
+
+#ifdef CONFIG_PCI_MSI
+
+static LIST_HEAD(of_pci_msi_chip_list);
+static DEFINE_MUTEX(of_pci_msi_chip_mutex);
+
+int of_pci_msi_chip_add(struct msi_chip *chip)
+{
+ if (!of_property_read_bool(chip->of_node, "msi-controller"))
+ return -EINVAL;
+
+ mutex_lock(&of_pci_msi_chip_mutex);
+ list_add(&chip->list, &of_pci_msi_chip_list);
+ mutex_unlock(&of_pci_msi_chip_mutex);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(of_pci_msi_chip_add);
+
+void of_pci_msi_chip_remove(struct msi_chip *chip)
+{
+ mutex_lock(&of_pci_msi_chip_mutex);
+ list_del(&chip->list);
+ mutex_unlock(&of_pci_msi_chip_mutex);
+}
+EXPORT_SYMBOL_GPL(of_pci_msi_chip_remove);
+
+struct msi_chip *of_pci_find_msi_chip_by_node(struct device_node *of_node)
+{
+ struct msi_chip *c;
+
+ mutex_lock(&of_pci_msi_chip_mutex);
+ list_for_each_entry(c, &of_pci_msi_chip_list, list) {
+ if (c->of_node == of_node) {
+ mutex_unlock(&of_pci_msi_chip_mutex);
+ return c;
+ }
+ }
+ mutex_unlock(&of_pci_msi_chip_mutex);
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(of_pci_find_msi_chip_by_node);
+
+#endif /* CONFIG_PCI_MSI */