This series adds Tegra210, Tegra186, and Tegra194 Quad SPI driver and
enables Quad SPI on Jetson Nano and Jetson Xavier NX.
QSPI controller is available on Tegra210, Tegra186 and Tegra194.
Tegra186 and Tegra194 has additional feature of combined sequence mode
where command, address and data can all be transferred in a single transfer.
Combined sequence mode is useful with DMA mode transfer.
This series does not have combined sequence mode feature as Tegra186/Tegra194
GPCDMA driver is not upstreamed yet.
This series includes
- dt-binding document
- QSPI driver for Tegra210/Tegra186/Tegra194
- Enables QSPI on Jetson Nano and Jetson Xavier NX.
Delta between patch versions:
[v3]: v2 has some mixed patches sent out accidentally.
v3 sends proper patches with fixes mentioned in v2.
[v2]: below v1 feedback
- Added SPI_MASTER_USES_HW_DUMMY_CYCLES flag for controllers supporting
hardware dummy cycles and skips dummy bytes transfer from software for
these controllers.
- Updated dt-binding doc with tx/rx tap delay properties.
- Added qspi_out clock to dt-binding doc which will be used later with
ddr mode support.
- All other v1 feedback on some cleanup.
Sowjanya Komatineni (9):
dt-bindings: clock: tegra: Add clock ID TEGRA210_CLK_QSPI_PM
dt-bindings: spi: Add Tegra Quad SPI device tree binding
MAINTAINERS: Add Tegra Quad SPI driver section
spi: tegra210-quad: Add support for Tegra210 QSPI controller
spi: spi-mem: Allow masters to transfer dummy cycles directly by
hardware
spi: tegra210-quad: Add support for hardware dummy cycles
arm64: tegra: Enable QSPI on Jetson Nano
arm64: tegra: Add QSPI nodes on Tegra194
arm64: tegra: Enable QSPI on Jetson Xavier NX
.../bindings/spi/nvidia,tegra210-quad.yaml | 130 ++
MAINTAINERS | 8 +
.../dts/nvidia/tegra194-p3509-0000+p3668-0000.dts | 12 +
arch/arm64/boot/dts/nvidia/tegra194.dtsi | 24 +
arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts | 12 +
arch/arm64/boot/dts/nvidia/tegra210.dtsi | 5 +-
drivers/spi/Kconfig | 9 +
drivers/spi/Makefile | 1 +
drivers/spi/spi-mem.c | 18 +-
drivers/spi/spi-tegra210-quad.c | 1407 ++++++++++++++++++++
include/dt-bindings/clock/tegra210-car.h | 2 +-
include/linux/spi/spi.h | 8 +
12 files changed, 1626 insertions(+), 10 deletions(-)
create mode 100644 Documentation/devicetree/bindings/spi/nvidia,tegra210-quad.yaml
create mode 100644 drivers/spi/spi-tegra210-quad.c
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2.7.4
