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| author |   Baruch Siach <baruch@tkos.co.il> | 2013-12-12 11:18:41 +0200 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2013-12-12 14:33:14 +0100 |
| commit | 3b31d0eca5fd8d7d485c7cb7319a5cd6a3207726 (patch) | |
| tree | b5e0c8075f4f2b0bca12b8d15e8d7048ce2b1168 /drivers/gpio/Kconfig | |
| parent | gpio: 74x164: Driver cleanup (diff) | |
| download | linux-dev-3b31d0eca5fd8d7d485c7cb7319a5cd6a3207726.tar.xz linux-dev-3b31d0eca5fd8d7d485c7cb7319a5cd6a3207726.zip | |
gpio: driver for Xtensa GPIO32
GPIO32 is a standard optional extension to the Xtensa architecture
core that provides preconfigured output and input ports for intra
SoC signaling. The GPIO32 option is implemented as 32bit Tensilica
Instruction Extension (TIE) output state called EXPSTATE, and 32bit
input wire called IMPWIRE. This driver treats input and output
states as two distinct devices.
v3:
* Use BUG() in xtensa_impwire_set_value() to indicate that
it should never be called (Linus Walleij)
v2:
* Address the comments of Linus Walleij:
- Add a few comments
- Expand commit log message
- Use the BIT() macro for bit offsets
- Rewrite CPENABLE handling as static inlines
- Use device_initcall()
* Depend on !SMP for reason explained in the comments (Marc Gauthier)
* Use XCHAL_CP_ID_XTIOP to enable/disable GPIO32 only
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/Kconfig')
| -rw-r--r-- | drivers/gpio/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 4127f68412eb..02e8d5350f8b 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -288,6 +288,14 @@ config GPIO_XILINX help Say yes here to support the Xilinx FPGA GPIO device +config GPIO_XTENSA + bool "Xtensa GPIO32 support" + depends on XTENSA + depends on !SMP + help + Say yes here to support the Xtensa internal GPIO32 IMPWIRE (input) + and EXPSTATE (output) ports + config GPIO_VR41XX tristate "NEC VR4100 series General-purpose I/O Uint support" depends on CPU_VR41XX |