On Tue, Feb 4, 2020 at 8:20 AM Simon Glass sjg@chromium.org wrote:
At present driver model supports the IRQ uclass but there is no way to request a particular interrupt for a driver.
Add a mechanism, similar to clock and reset, to read the interrupts required by a device from the device tree and to request those interrupts.
U-Boot itself does not have interrupt-driven handlers, so just provide a means to read and clear an interrupt. This can be useful to handle peripherals which must use an interrupt to determine when data is available, for example.
Bring over the basic binding file as well, from Linux v5.4. Note that the older binding is not supported in U-Boot; the newer 'special form' must be used.
Add a simple test of the new functionality.
Signed-off-by: Simon Glass sjg@chromium.org
Changes in v2: None
arch/sandbox/dts/test.dts | 5 +- .../interrupt-controller/interrupts.txt | 131 ++++++++++++++++++ drivers/misc/irq-uclass.c | 116 ++++++++++++++++ drivers/misc/irq_sandbox.c | 41 ++++++ include/irq.h | 115 +++++++++++++++ test/dm/irq.c | 31 +++++ 6 files changed, 438 insertions(+), 1 deletion(-) create mode 100644 doc/device-tree-bindings/interrupt-controller/interrupts.txt
Reviewed-by: Bin Meng bmeng.cn@gmail.com