bc1099d2b2
This adds support for an optional device-tree property that makes the driver skip all the delays around clocking the GPIOs and set it in the device-tree of common POWER9 based OpenPower platforms. This useful on chips like the AST2500 where the GPIO block is running at a fairly low clock frequency (25Mhz typically). In this case, the delays are unnecessary and due to the low precision of the timers, actually quite harmful in terms of performance. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Tested-by: Joel Stanley <joel@jms.id.au> |
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| .. | ||
| fsi-core.c | ||
| fsi-master-gpio.c | ||
| fsi-master-hub.c | ||
| fsi-master.h | ||
| fsi-scom.c | ||
| Kconfig | ||
| Makefile | ||