Andrew Jeffery c1432423a1 pinctrl: aspeed: Fix spurious mux failures on the AST2500 ... Commit 674fa8daa8 ("pinctrl: aspeed-g5: Delay acquisition of regmaps") was determined to be a partial fix to the problem of acquiring the LPC Host Controller and GFX regmaps: The AST2500 pin controller may need to fetch syscon regmaps during expression evaluation as well as when setting mux state. For example, this case is hit by attempting to export pins exposing the LPC Host Controller as GPIOs. An optional eval() hook is added to the Aspeed pinmux operation struct and called from aspeed_sig_expr_eval() if the pointer is set by the SoC-specific driver. This enables the AST2500 to perform the custom action of acquiring its regmap dependencies as required. John Wang tested the fix on an Inspur FP5280G2 machine (AST2500-based) where the issue was found, and I've booted the fix on Witherspoon (AST2500) and Palmetto (AST2400) machines, and poked at relevant pins under QEMU by forcing mux configurations via devmem before exporting GPIOs to exercise the driver. Fixes: 7d29ed88ac ("pinctrl: aspeed: Read and write bits in LPC and GFX controllers") Fixes: 674fa8daa8 ("pinctrl: aspeed-g5: Delay acquisition of regmaps") Reported-by: John Wang <wangzqbj@inspur.com> Tested-by: John Wang <wangzqbj@inspur.com> Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Link: https://lore.kernel.org/r/20190829071738.2523-1-andrew@aj.id.au Signed-off-by: Linus Walleij <linus.walleij@linaro.org>		2019-09-12 00:08:27 +01:00
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Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	This is the bulk of pin control changes for the v5.3 kernel	2019-07-13 15:02:27 -07:00
pinctrl-aspeed-g4.c	pinctrl: aspeed-g5: Delay acquisition of regmaps	2019-07-29 00:52:51 +02:00
pinctrl-aspeed-g5.c	pinctrl: aspeed: Fix spurious mux failures on the AST2500	2019-09-12 00:08:27 +01:00
pinctrl-aspeed.c	pinctrl: aspeed-g5: Delay acquisition of regmaps	2019-07-29 00:52:51 +02:00
pinctrl-aspeed.h	This is the bulk of pin control changes for the v5.3 kernel	2019-07-13 15:02:27 -07:00
pinmux-aspeed.c	pinctrl: aspeed: Fix spurious mux failures on the AST2500	2019-09-12 00:08:27 +01:00
pinmux-aspeed.h	pinctrl: aspeed: Fix spurious mux failures on the AST2500	2019-09-12 00:08:27 +01:00