[U-Boot] [PATCH v1 1/2] x86: acpi: Add DMA descriptors for SPI5 on Intel Tangier
Intel Tangier SoC has a general purpose DMA which can serve to speed up communications on SPI and I2C serial buses.
Provide DMA descriptors to utilize this capability in the future.
Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com --- arch/x86/include/asm/arch-tangier/acpi/southcluster.asl | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl b/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl index aad1bf0c87..e4d876ab78 100644 --- a/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl +++ b/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl @@ -189,6 +189,9 @@ Device (PCI0) "\_SB.PCI0.GPIO", 0, ResourceConsumer, , ) { 112 } GpioIo(Exclusive, PullUp, 0, 0, IoRestrictionOutputOnly, "\_SB.PCI0.GPIO", 0, ResourceConsumer, , ) { 113 } + + FixedDMA(0x000d, 0x0002, Width32bit, ) + FixedDMA(0x000c, 0x0003, Width32bit, ) })
Method (_CRS, 0, NotSerialized)
Intel Tangier SoC has a general purpose DMA which can serve to speed up communications on SPI and I2C serial buses.
Provide DMA descriptors to utilize this capability in the future.
Note, I2C6, which is available to user, has no DMA request lines connected.
Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com --- .../include/asm/arch-tangier/acpi/southcluster.asl | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl b/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl index e4d876ab78..1f940511a1 100644 --- a/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl +++ b/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl @@ -232,6 +232,17 @@ Device (PCI0) { Return (STA_VISIBLE) } + + Name (RBUF, ResourceTemplate() + { + FixedDMA(0x0009, 0x0000, Width32bit, ) + FixedDMA(0x0008, 0x0001, Width32bit, ) + }) + + Method (_CRS, 0, NotSerialized) + { + Return (RBUF) + } }
Device (I2C6)
On Tue, Feb 26, 2019 at 7:43 PM Andy Shevchenko andriy.shevchenko@linux.intel.com wrote:
Intel Tangier SoC has a general purpose DMA which can serve to speed up communications on SPI and I2C serial buses.
Provide DMA descriptors to utilize this capability in the future.
Note, I2C6, which is available to user, has no DMA request lines connected.
Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com
.../include/asm/arch-tangier/acpi/southcluster.asl | 11 +++++++++++ 1 file changed, 11 insertions(+)
Reviewed-by: Bin Meng bmeng.cn@gmail.com
On Thu, Feb 28, 2019 at 11:39 AM Bin Meng bmeng.cn@gmail.com wrote:
On Tue, Feb 26, 2019 at 7:43 PM Andy Shevchenko andriy.shevchenko@linux.intel.com wrote:
Intel Tangier SoC has a general purpose DMA which can serve to speed up communications on SPI and I2C serial buses.
Provide DMA descriptors to utilize this capability in the future.
Note, I2C6, which is available to user, has no DMA request lines connected.
Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com
.../include/asm/arch-tangier/acpi/southcluster.asl | 11 +++++++++++ 1 file changed, 11 insertions(+)
Reviewed-by: Bin Meng bmeng.cn@gmail.com
applied to u-boot-x86, thanks!
On Tue, Feb 26, 2019 at 7:43 PM Andy Shevchenko andriy.shevchenko@linux.intel.com wrote:
Intel Tangier SoC has a general purpose DMA which can serve to speed up communications on SPI and I2C serial buses.
Provide DMA descriptors to utilize this capability in the future.
Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com
arch/x86/include/asm/arch-tangier/acpi/southcluster.asl | 3 +++ 1 file changed, 3 insertions(+)
Reviewed-by: Bin Meng bmeng.cn@gmail.com
On Thu, Feb 28, 2019 at 11:39 AM Bin Meng bmeng.cn@gmail.com wrote:
On Tue, Feb 26, 2019 at 7:43 PM Andy Shevchenko andriy.shevchenko@linux.intel.com wrote:
Intel Tangier SoC has a general purpose DMA which can serve to speed up communications on SPI and I2C serial buses.
Provide DMA descriptors to utilize this capability in the future.
Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com
arch/x86/include/asm/arch-tangier/acpi/southcluster.asl | 3 +++ 1 file changed, 3 insertions(+)
Reviewed-by: Bin Meng bmeng.cn@gmail.com
applied to u-boot-x86, thanks!
participants (2)
-
Andy Shevchenko -
Bin Meng