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i2c: muxes: pca954x: clarify enable field

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The chip_desc.enable field is used only for muxes, not for switches.
Document it and remove the unused values.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: Heiko Schocher <hs@denx.de>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Heiko Schocher<hs@denx.de>
This commit is contained in:
Luca Ceresoli
2019-04-09 08:57:42 +02:00
committed by Heiko Schocher
parent 4cdf4e0655
commit 5995cdb167
1 changed files with 1 additions and 3 deletions
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4
drivers/i2c/muxes/pca954x.c
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@@ -22,7 +22,7 @@ enum pca_type {
}; };
struct chip_desc { struct chip_desc {
u8 enable; u8 enable; /* Enable mask in ctl register (used for muxes only) */
enum muxtype { enum muxtype {
pca954x_ismux = 0, pca954x_ismux = 0,
pca954x_isswi, pca954x_isswi,
@@ -48,12 +48,10 @@ static const struct chip_desc chips[] = {
.width = 8, .width = 8,
}, },
[PCA9548] = { [PCA9548] = {
.enable = 0x8,
.muxtype = pca954x_isswi, .muxtype = pca954x_isswi,
.width = 8, .width = 8,
}, },
[PCA9646] = { [PCA9646] = {
.enable = 0x0,
.muxtype = pca954x_isswi, .muxtype = pca954x_isswi,
.width = 4, .width = 4,
}, },