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macintosh/via-pmu68k: Don't load driver on unsupported hardware

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Don't load the via-pmu68k driver on early PowerBooks. The M50753 PMU
device found in those models was never supported by this driver.
Attempting to load the driver usually causes a boot hang.

Signed-off-by: Finn Thain <[email protected]>
Reviewed-by: Michael Schmitz <[email protected]>
Acked-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
This commit is contained in:
Finn Thain 2018-07-02 04:21:19 -04:00 • committed by Michael Ellerman
commit 54c990775f
3 changed files with 3 additions and 9 deletions
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4
drivers/macintosh/via-pmu68k.c
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@ -175,9 +175,6 @@ static s8 pmu_data_len[256][2] = {
int __init find_via_pmu(void)
{
switch (macintosh_config->adb_type) {
case MAC_ADB_PB1:
pmu_kind = PMU_68K_V1;
break;
case MAC_ADB_PB2:
pmu_kind = PMU_68K_V2;
break;
@ -785,7 +782,6 @@ pmu_enable_backlight(int on)
/* first call: get current backlight value */
if (backlight_level < 0) {
switch(pmu_kind) {
case PMU_68K_V1:
case PMU_68K_V2:
pmu_request(&req, NULL, 3, PMU_READ_NVRAM, 0x14, 0xe);
while (!req.complete)