android_kernel_motorola_sm6375/drivers/bus
Repository files (latest commit first)
Filename Latest commit message Latest commit date
Ondrej Jirman d04ffa50f9 bus: sunxi-rsb: Return correct data when mixing 16-bit and 8-bit reads
[ Upstream commit a43ab30dcd4a1abcdd0d2461bf1cf7c0817f6cd3 ]

When doing a 16-bit read that returns data in the MSB byte, the
RSB_DATA register will keep the MSB byte unchanged when doing
the following 8-bit read. sunxi_rsb_read() will then return
a result that contains high byte from 16-bit read mixed with
the 8-bit result.

The consequence is that after this happens the PMIC's regmap will
look like this: (0x33 is the high byte from the 16-bit read)

% cat /sys/kernel/debug/regmap/sunxi-rsb-3a3/registers
00: 33
01: 33
02: 33
03: 33
04: 33
05: 33
06: 33
07: 33
08: 33
09: 33
0a: 33
0b: 33
0c: 33
0d: 33
0e: 33
[snip]

Fix this by masking the result of the read with the correct mask
based on the size of the read. There are no 16-bit users in the
mainline kernel, so this doesn't need to get into the stable tree.

Signed-off-by: Ondrej Jirman <megous@megous.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-04-17 10:49:56 +02:00
..
fsl-mc bus: fsl-mc: remove explicit device_link_del 2019-08-16 14:17:35 -05:00
arm-cci.c
brcmstb_gisb.c
da8xx-mstpri.c
hisi_lpc.c
imx-weim.c bus: imx-weim: remove incorrect __init annotations 2019-09-04 17:59:32 +02:00
Kconfig bus: tegra-aconnect: Remove PM_CLK dependency 2020-03-05 16:43:51 +01:00
Makefile bus: Add support for Moxtet bus 2019-08-14 15:30:35 +02:00
mips_cdmm.c
moxtet.c bus: moxtet: fix potential stack buffer overflow 2020-02-19 19:53:04 +01:00
mvebu-mbus.c
omap-ocp2scp.c
omap_l3_noc.c
omap_l3_noc.h
omap_l3_smx.c
omap_l3_smx.h
qcom-ebi2.c
simple-pm-bus.c
sun50i-de2.c
sunxi-rsb.c bus: sunxi-rsb: Return correct data when mixing 16-bit and 8-bit reads 2020-04-17 10:49:56 +02:00
tegra-aconnect.c
tegra-gmi.c
ti-sysc.c bus: ti-sysc: Fix 1-wire reset quirk 2020-03-12 13:00:31 +01:00
ts-nbus.c
uniphier-system-bus.c bus: uniphier-system-bus: use devm_platform_ioremap_resource() 2019-09-05 17:57:18 +02:00
vexpress-config.c