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ARM: tegra: core SoC enhancements for 3.12

Browse source 
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.
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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 <[email protected]>
This commit is contained in:
Kevin Hilman 2013-08-21 10:16:55 -07:00
commit bfa664f21b
60 changed files with 3521 additions and 1150 deletions
Download patch file Download diff file Expand all files Collapse all files

4
drivers/pci/Kconfig
View file

@ -1,13 +1,9 @@
#
# PCI configuration
#
config ARCH_SUPPORTS_MSI
bool
config PCI_MSI
bool "Message Signaled Interrupts (MSI and MSI-X)"
depends on PCI
depends on ARCH_SUPPORTS_MSI
help
This allows device drivers to enable MSI (Message Signaled
Interrupts). Message Signaled Interrupts enable a device to

4
drivers/pci/host/Kconfig
View file

@ -14,4 +14,8 @@ config PCI_EXYNOS
select PCIEPORTBUS
select PCIE_DW
config PCI_TEGRA
bool "NVIDIA Tegra PCIe controller"
depends on ARCH_TEGRA
endmenu

1
drivers/pci/host/Makefile
View file

@ -1,2 +1,3 @@
obj-$(CONFIG_PCI_MVEBU) += pci-mvebu.o
obj-$(CONFIG_PCIE_DW) += pcie-designware.o
obj-$(CONFIG_PCI_TEGRA) += pci-tegra.o

1702
drivers/pci/host/pci-tegra.c Normal file
View file

File diff suppressed because it is too large Load diff

87
drivers/pci/msi.c
View file

@ -30,20 +30,60 @@ static int pci_msi_enable = 1;
/* Arch hooks */
#ifndef arch_msi_check_device
int arch_msi_check_device(struct pci_dev *dev, int nvec, int type)
#if defined(CONFIG_GENERIC_HARDIRQS)
int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
{
struct msi_chip *chip = dev->bus->msi;
int err;
if (!chip || !chip->setup_irq)
return -EINVAL;
err = chip->setup_irq(chip, dev, desc);
if (err < 0)
return err;
irq_set_chip_data(desc->irq, chip);
return 0;
}
void __weak arch_teardown_msi_irq(unsigned int irq)
{
struct msi_chip *chip = irq_get_chip_data(irq);
if (!chip || !chip->teardown_irq)
return;
chip->teardown_irq(chip, irq);
}
int __weak arch_msi_check_device(struct pci_dev *dev, int nvec, int type)
{
struct msi_chip *chip = dev->bus->msi;
if (!chip || !chip->check_device)
return 0;
return chip->check_device(chip, dev, nvec, type);
}
#else
int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
{
return -ENOSYS;
}
void __weak arch_teardown_msi_irq(unsigned int irq)
{
}
int __weak arch_msi_check_device(struct pci_dev *dev, int nvec, int type)
{
return 0;
}
#endif
#endif /* CONFIG_GENERIC_HARDIRQS */
#ifndef arch_setup_msi_irqs
# define arch_setup_msi_irqs default_setup_msi_irqs
# define HAVE_DEFAULT_MSI_SETUP_IRQS
#endif
#ifdef HAVE_DEFAULT_MSI_SETUP_IRQS
int default_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
{
struct msi_desc *entry;
int ret;
@ -65,14 +105,11 @@ int default_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
return 0;
}
#endif
#ifndef arch_teardown_msi_irqs
# define arch_teardown_msi_irqs default_teardown_msi_irqs
# define HAVE_DEFAULT_MSI_TEARDOWN_IRQS
#endif
#ifdef HAVE_DEFAULT_MSI_TEARDOWN_IRQS
/*
* We have a default implementation available as a separate non-weak
* function, as it is used by the Xen x86 PCI code
*/
void default_teardown_msi_irqs(struct pci_dev *dev)
{
struct msi_desc *entry;
@ -89,14 +126,12 @@ void default_teardown_msi_irqs(struct pci_dev *dev)
arch_teardown_msi_irq(entry->irq + i);
}
}
#endif
#ifndef arch_restore_msi_irqs
# define arch_restore_msi_irqs default_restore_msi_irqs
# define HAVE_DEFAULT_MSI_RESTORE_IRQS
#endif
void __weak arch_teardown_msi_irqs(struct pci_dev *dev)
{
return default_teardown_msi_irqs(dev);
}
#ifdef HAVE_DEFAULT_MSI_RESTORE_IRQS
void default_restore_msi_irqs(struct pci_dev *dev, int irq)
{
struct msi_desc *entry;
@ -114,7 +149,11 @@ void default_restore_msi_irqs(struct pci_dev *dev, int irq)
if (entry)
write_msi_msg(irq, &entry->msg);
}
#endif
void __weak arch_restore_msi_irqs(struct pci_dev *dev, int irq)
{
return default_restore_msi_irqs(dev, irq);
}
static void msi_set_enable(struct pci_dev *dev, int enable)
{

1
drivers/pci/probe.c
View file

@ -666,6 +666,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
child->parent = parent;
child->ops = parent->ops;
child->msi = parent->msi;
child->sysdata = parent->sysdata;
child->bus_flags = parent->bus_flags;