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author | Kevin Hilman <khilman@linaro.org> | 2013-08-21 19:16:55 +0200 |
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committer | Kevin Hilman <khilman@linaro.org> | 2013-08-21 19:17:18 +0200 |
commit | bfa664f21b0357f2ad9cdf519f594ece36ec8f64 (patch) | |
tree | f377028eba58633d917d65c1141977b2e8ca9529 /drivers/of | |
parent | Merge tag 'omap-for-v3.12/dra7xx' of git://git.kernel.org/pub/scm/linux/kerne... (diff) | |
parent | ARM: tegra: disable LP2 cpuidle state if PCIe is enabled (diff) | |
download | linux-bfa664f21b0357f2ad9cdf519f594ece36ec8f64.tar.xz linux-bfa664f21b0357f2ad9cdf519f594ece36ec8f64.zip |
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.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c index 42c687a820ac..e5ca00893c0c 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 */ |