[PATCH v4 08/11] macintosh/via-pmu68k: Don't load driver on unsupported hardware

[Finn Thain]

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.

Cc: Geert Uytterhoeven <ge...@linux-m68k.org>
Signed-off-by: Finn Thain <fth...@telegraphics.com.au>
Reviewed-by: Michael Schmitz <schmitz...@gmail.com>
---
 arch/m68k/mac/misc.c           | 6 ++----
 drivers/macintosh/via-pmu68k.c | 4 ----
 include/uapi/linux/pmu.h       | 2 +-
 3 files changed, 3 insertions(+), 9 deletions(-)

diff --git a/arch/m68k/mac/misc.c b/arch/m68k/mac/misc.c
index c68054361615..7ccb799eeb57 100644
--- a/arch/m68k/mac/misc.c
+++ b/arch/m68k/mac/misc.c
@@ -478,8 +478,7 @@ void mac_poweroff(void)
                cuda_shutdown();
 #endif
 #ifdef CONFIG_ADB_PMU68K
-       } else if (macintosh_config->adb_type == MAC_ADB_PB1
-               || macintosh_config->adb_type == MAC_ADB_PB2) {
+       } else if (macintosh_config->adb_type == MAC_ADB_PB2) {
                pmu_shutdown();
 #endif
        }
@@ -520,8 +519,7 @@ void mac_reset(void)
                cuda_restart();
 #endif
 #ifdef CONFIG_ADB_PMU68K
-       } else if (macintosh_config->adb_type == MAC_ADB_PB1
-               || macintosh_config->adb_type == MAC_ADB_PB2) {
+       } else if (macintosh_config->adb_type == MAC_ADB_PB2) {
                pmu_restart();
 #endif
        } else if (CPU_IS_030) {
diff --git a/drivers/macintosh/via-pmu68k.c b/drivers/macintosh/via-pmu68k.c
index d545ed45e482..bec8e1837d7d 100644
--- a/drivers/macintosh/via-pmu68k.c
+++ b/drivers/macintosh/via-pmu68k.c
@@ -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)
diff --git a/include/uapi/linux/pmu.h b/include/uapi/linux/pmu.h
index 89cb1acea93a..e128f609281a 100644
--- a/include/uapi/linux/pmu.h
+++ b/include/uapi/linux/pmu.h
@@ -93,7 +93,7 @@ enum {
        PMU_HEATHROW_BASED,     /* PowerBook G3 series */
        PMU_PADDINGTON_BASED,   /* 1999 PowerBook G3 */
        PMU_KEYLARGO_BASED,     /* Core99 motherboard (PMU99) */
-       PMU_68K_V1,             /* 68K PMU, version 1 */
+       PMU_68K_V1,             /* Unused/deprecated */
        PMU_68K_V2,             /* 68K PMU, version 2 */
 };
 
-- 
2.16.4