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alistair23-linux/drivers/pinctrl
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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
..
actions treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
aspeed pinctrl: aspeed: Fix spurious mux failures on the AST2500 2019-09-12 00:08:27 +01:00
bcm This is the bulk of pin control changes for the v5.3 kernel 2019-07-13 15:02:27 -07:00
berlin treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
cirrus This is the bulk of pin control changes for the v5.3 kernel 2019-07-13 15:02:27 -07:00
freescale This is the bulk of pin control changes for the v5.3 kernel 2019-07-13 15:02:27 -07:00
intel This is the bulk of pin control changes for the v5.3 kernel 2019-07-13 15:02:27 -07:00
mediatek This is the bulk of pin control changes for the v5.3 kernel 2019-07-13 15:02:27 -07:00
meson This is the bulk of pin control changes for the v5.3 kernel 2019-07-13 15:02:27 -07:00
mvebu This is the bulk of pin control changes for the v5.3 kernel 2019-07-13 15:02:27 -07:00
nomadik pinctrl: Minimize SPDX hamming distance 2019-06-20 10:54:55 +02:00
nuvoton treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
pxa treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
qcom This is the bulk of pin control changes for the v5.3 kernel 2019-07-13 15:02:27 -07:00
samsung pinctrl: samsung: fix leaked of_node references 2019-04-23 10:59:47 +02:00
sh-pfc This is the bulk of pin control changes for the v5.3 kernel 2019-07-13 15:02:27 -07:00
sirf treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 4 2019-05-21 11:28:40 +02:00
spear treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
sprd treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
stm32 This is the bulk of pin control changes for the v5.3 kernel 2019-07-13 15:02:27 -07:00
sunxi treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
tegra This is the bulk of pin control changes for the v5.3 kernel 2019-07-13 15:02:27 -07:00
ti treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
uniphier treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
vt8500 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
zte treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
Kconfig Pin control fixes for v5.2: 2019-05-28 09:35:04 -07:00
Makefile - Core Frameworks 2019-05-14 10:39:08 -07:00
core.c This is the bulk of pin control changes for the v5.3 kernel 2019-07-13 15:02:27 -07:00
core.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
devicetree.c driver: core: Allow subsystems to continue deferring probe 2019-07-03 21:28:20 +02:00
devicetree.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201 2019-05-30 11:29:52 -07:00
pinconf-generic.c This is the bulk of pin control changes for the v5.3 kernel 2019-07-13 15:02:27 -07:00
pinconf.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
pinconf.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
pinctrl-amd.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 422 2019-06-05 17:37:15 +02:00
pinctrl-amd.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 422 2019-06-05 17:37:15 +02:00
pinctrl-artpec6.c pinctrl: artpec6: Drop unused function and rename 2019-04-11 15:41:20 +02:00
pinctrl-as3722.c pinctrl: Include <linux/gpio/driver.h> nothing else 2018-09-14 15:10:57 +02:00
pinctrl-at91-pio4.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
pinctrl-at91.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 434 2019-06-05 17:37:16 +02:00
pinctrl-at91.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
pinctrl-axp209.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
pinctrl-bm1880.c pinctrl: Add drive strength support for BM1880 SoC 2019-06-08 01:29:42 +02:00
pinctrl-coh901.c pinctrl: Minimize SPDX hamming distance 2019-06-20 10:54:55 +02:00
pinctrl-coh901.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pinctrl-da850-pupd.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 285 2019-06-05 17:36:37 +02:00
pinctrl-digicolor.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
pinctrl-falcon.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
pinctrl-gemini.c pinctrl: gemini: Fix up TVC clock group 2018-10-10 21:05:35 +02:00
pinctrl-ingenic.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
pinctrl-lantiq.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 332 2019-06-05 17:37:06 +02:00
pinctrl-lantiq.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 332 2019-06-05 17:37:06 +02:00
pinctrl-lpc18xx.c pinctrl: lpc18xx: Use define directive for PIN_CONFIG_GPIO_PIN_INT 2018-11-09 10:23:58 +01:00
pinctrl-max77620.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 422 2019-06-05 17:37:15 +02:00
pinctrl-mcp23s08.c pinctrl: mcp23s08: Fix add_data and irqchip_add_nested call order 2019-06-25 14:14:26 +02:00
pinctrl-ocelot.c pinctrl: ocelot: fix pinmuxing for pins after 31 2019-06-25 15:42:31 +02:00
pinctrl-oxnas.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 445 2019-06-05 17:37:18 +02:00
pinctrl-palmas.c pinctrl: palmas: Delete an error message for a failed memory allocation in palmas_pinctrl_probe() 2018-01-03 08:46:49 +01:00
pinctrl-pic32.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 445 2019-06-05 17:37:18 +02:00
pinctrl-pic32.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 445 2019-06-05 17:37:18 +02:00
pinctrl-pistachio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 422 2019-06-05 17:37:15 +02:00
pinctrl-rk805.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
pinctrl-rockchip.c This is the bulk of pin control changes for the v5.3 kernel 2019-07-13 15:02:27 -07:00
pinctrl-rza1.c pinctrl: rza1: Remove unneeded spinlock acquisitions 2019-04-02 09:57:50 +02:00
pinctrl-rza2.c pinctrl: Add RZ/A2 pin and gpio controller 2018-11-23 09:30:27 +01:00
pinctrl-rzn1.c pinctrl: rzn1: Fix of_get_child_count() error check 2018-12-04 10:33:49 +01:00
pinctrl-single.c pinctrl: Convert to using %pOFn instead of device_node.name 2018-08-29 14:05:36 +02:00
pinctrl-st.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
pinctrl-stmfx.c pinctrl: stmfx: enable links creations 2019-05-23 09:35:48 +02:00
pinctrl-sx150x.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
pinctrl-tb10x.c This is the bulk of pin control changes for the v5.3 kernel 2019-07-13 15:02:27 -07:00
pinctrl-u300.c pinctrl: Minimize SPDX hamming distance 2019-06-20 10:54:55 +02:00
pinctrl-utils.c pinctrl: utils: Delete an error message for a failed memory allocation in pinctrl_utils_add_map_configs() 2018-01-03 08:46:53 +01:00
pinctrl-utils.h pinctrl: Rename pinctrl_utils_dt_free_map to pinctrl_utils_free_map 2016-04-01 15:06:36 +02:00
pinctrl-xway.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 332 2019-06-05 17:37:06 +02:00
pinctrl-zynq.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
pinmux.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
pinmux.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00