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authorFinn Thain <fthain@telegraphics.com.au>2018-01-27 23:51:40 (GMT)
committerGeert Uytterhoeven <geert@linux-m68k.org>2018-03-19 09:22:59 (GMT)
commita64138ec15f4361c456563167bae12ed95a68d6b (patch)
treeabb1bc384ff0859af962044415ec0b0c8079c5df /drivers/macintosh
parenta1eb1cdf4e55e1ecdb4a474070450d8a648686bf (diff)
macintosh/via-pmu68k: Initialize PMU driver with setup_arch and arch_initcall
The PMU watchdog will power down the system if the kernel is slow to start up, e.g. due to unpacking a large initrd. The powerpc version of this driver (via-pmu.c) has a solution for the same problem. It uses this call sequence: setup_arch find_via_pmu init_pmu ... arch_initcall via_pmu_start Bring via-pmu68k.c into line with via-pmu.c to fix this issue. Cc: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'drivers/macintosh')
-rw-r--r--drivers/macintosh/via-pmu68k.c89
1 files changed, 61 insertions, 28 deletions
diff --git a/drivers/macintosh/via-pmu68k.c b/drivers/macintosh/via-pmu68k.c
index 25465fb..7d9c4ba 100644
--- a/drivers/macintosh/via-pmu68k.c
+++ b/drivers/macintosh/via-pmu68k.c
@@ -109,6 +109,7 @@ static int pmu_autopoll(int devs);
void pmu_poll(void);
static int pmu_reset_bus(void);
+static int init_pmu(void);
static void pmu_start(void);
static void send_byte(int x);
static void recv_byte(void);
@@ -171,23 +172,76 @@ static s8 pmu_data_len[256][2] = {
/*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
};
-int pmu_probe(void)
+int __init find_via_pmu(void)
{
- if (macintosh_config->adb_type == MAC_ADB_PB1) {
+ switch (macintosh_config->adb_type) {
+ case MAC_ADB_PB1:
pmu_kind = PMU_68K_V1;
- } else if (macintosh_config->adb_type == MAC_ADB_PB2) {
+ break;
+ case MAC_ADB_PB2:
pmu_kind = PMU_68K_V2;
- } else {
+ break;
+ default:
+ pmu_kind = PMU_UNKNOWN;
return -ENODEV;
}
pmu_state = idle;
+ if (!init_pmu())
+ goto fail_init;
+
+ pr_info("adb: PMU 68K driver v0.5 for Unified ADB\n");
+
+ return 1;
+
+fail_init:
+ pmu_kind = PMU_UNKNOWN;
return 0;
}
-static int
-pmu_init(void)
+static int pmu_probe(void)
+{
+ if (pmu_kind == PMU_UNKNOWN)
+ return -ENODEV;
+ return 0;
+}
+
+static int pmu_init(void)
+{
+ if (pmu_kind == PMU_UNKNOWN)
+ return -ENODEV;
+ return 0;
+}
+
+static int __init via_pmu_start(void)
+{
+ if (pmu_kind == PMU_UNKNOWN)
+ return -ENODEV;
+
+ if (request_irq(IRQ_MAC_ADB_SR, pmu_interrupt, 0, "PMU_SR",
+ pmu_interrupt)) {
+ pr_err("%s: can't get SR irq\n", __func__);
+ return -ENODEV;
+ }
+ if (request_irq(IRQ_MAC_ADB_CL, pmu_interrupt, 0, "PMU_CL",
+ pmu_interrupt)) {
+ pr_err("%s: can't get CL irq\n", __func__);
+ free_irq(IRQ_MAC_ADB_SR, pmu_interrupt);
+ return -ENODEV;
+ }
+
+ pmu_fully_inited = 1;
+
+ /* Enable backlight */
+ pmu_enable_backlight(1);
+
+ return 0;
+}
+
+arch_initcall(via_pmu_start);
+
+static int __init init_pmu(void)
{
int timeout;
volatile struct adb_request req;
@@ -238,28 +292,7 @@ pmu_init(void)
bright_req_2.complete = 1;
bright_req_3.complete = 1;
- if (request_irq(IRQ_MAC_ADB_SR, pmu_interrupt, 0, "pmu-shift",
- pmu_interrupt)) {
- printk(KERN_ERR "pmu_init: can't get irq %d\n",
- IRQ_MAC_ADB_SR);
- return -EAGAIN;
- }
- if (request_irq(IRQ_MAC_ADB_CL, pmu_interrupt, 0, "pmu-clock",
- pmu_interrupt)) {
- printk(KERN_ERR "pmu_init: can't get irq %d\n",
- IRQ_MAC_ADB_CL);
- free_irq(IRQ_MAC_ADB_SR, pmu_interrupt);
- return -EAGAIN;
- }
-
- pmu_fully_inited = 1;
-
- /* Enable backlight */
- pmu_enable_backlight(1);
-
- printk("adb: PMU 68K driver v0.5 for Unified ADB.\n");
-
- return 0;
+ return 1;
}
int

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