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-rw-r--r--drivers/bus/ti-sysc.c118
1 files changed, 61 insertions, 57 deletions
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index c9bac9dc4637..087a67617eef 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -87,6 +87,7 @@ struct sysc {
u32 revision;
bool enabled;
bool needs_resume;
+ unsigned int noirq_suspend:1;
bool child_needs_resume;
struct delayed_work idle_work;
};
@@ -712,19 +713,25 @@ static int sysc_suspend(struct device *dev)
ddata = dev_get_drvdata(dev);
- if (ddata->cfg.quirks & (SYSC_QUIRK_RESOURCE_PROVIDER |
- SYSC_QUIRK_LEGACY_IDLE))
+ if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
return 0;
- if (!ddata->enabled)
+ if (!ddata->enabled || ddata->noirq_suspend)
return 0;
dev_dbg(ddata->dev, "%s %s\n", __func__,
ddata->name ? ddata->name : "");
error = pm_runtime_put_sync_suspend(dev);
- if (error < 0) {
- dev_warn(ddata->dev, "%s not idle %i %s\n",
+ if (error == -EBUSY) {
+ dev_dbg(ddata->dev, "%s busy, tagging for noirq suspend %s\n",
+ __func__, ddata->name ? ddata->name : "");
+
+ ddata->noirq_suspend = true;
+
+ return 0;
+ } else if (error < 0) {
+ dev_warn(ddata->dev, "%s cannot suspend %i %s\n",
__func__, error,
ddata->name ? ddata->name : "");
@@ -743,73 +750,86 @@ static int sysc_resume(struct device *dev)
ddata = dev_get_drvdata(dev);
- if (ddata->cfg.quirks & (SYSC_QUIRK_RESOURCE_PROVIDER |
- SYSC_QUIRK_LEGACY_IDLE))
+ if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
return 0;
- if (ddata->needs_resume) {
- dev_dbg(ddata->dev, "%s %s\n", __func__,
- ddata->name ? ddata->name : "");
+ if (!ddata->needs_resume || ddata->noirq_suspend)
+ return 0;
- error = pm_runtime_get_sync(dev);
- if (error < 0) {
- dev_err(ddata->dev, "%s error %i %s\n",
- __func__, error,
- ddata->name ? ddata->name : "");
+ dev_dbg(ddata->dev, "%s %s\n", __func__,
+ ddata->name ? ddata->name : "");
- return error;
- }
+ error = pm_runtime_get_sync(dev);
+ if (error < 0) {
+ dev_err(ddata->dev, "%s error %i %s\n",
+ __func__, error,
+ ddata->name ? ddata->name : "");
- ddata->needs_resume = false;
+ return error;
}
+ ddata->needs_resume = false;
+
return 0;
}
static int sysc_noirq_suspend(struct device *dev)
{
struct sysc *ddata;
+ int error;
ddata = dev_get_drvdata(dev);
if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
return 0;
- if (!(ddata->cfg.quirks & SYSC_QUIRK_RESOURCE_PROVIDER))
- return 0;
-
- if (!ddata->enabled)
+ if (!ddata->enabled || !ddata->noirq_suspend)
return 0;
dev_dbg(ddata->dev, "%s %s\n", __func__,
ddata->name ? ddata->name : "");
+ error = sysc_runtime_suspend(dev);
+ if (error) {
+ dev_warn(ddata->dev, "%s busy %i %s\n",
+ __func__, error, ddata->name ? ddata->name : "");
+
+ return 0;
+ }
+
ddata->needs_resume = true;
- return sysc_runtime_suspend(dev);
+ return 0;
}
static int sysc_noirq_resume(struct device *dev)
{
struct sysc *ddata;
+ int error;
ddata = dev_get_drvdata(dev);
if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
return 0;
- if (!(ddata->cfg.quirks & SYSC_QUIRK_RESOURCE_PROVIDER))
+ if (!ddata->needs_resume || !ddata->noirq_suspend)
return 0;
- if (ddata->needs_resume) {
- dev_dbg(ddata->dev, "%s %s\n", __func__,
- ddata->name ? ddata->name : "");
+ dev_dbg(ddata->dev, "%s %s\n", __func__,
+ ddata->name ? ddata->name : "");
- ddata->needs_resume = false;
+ error = sysc_runtime_resume(dev);
+ if (error) {
+ dev_warn(ddata->dev, "%s cannot resume %i %s\n",
+ __func__, error,
+ ddata->name ? ddata->name : "");
- return sysc_runtime_resume(dev);
+ return error;
}
+ /* Maybe also reconsider clearing noirq_suspend at some point */
+ ddata->needs_resume = false;
+
return 0;
}
#endif
@@ -848,26 +868,6 @@ struct sysc_revision_quirk {
}
static const struct sysc_revision_quirk sysc_revision_quirks[] = {
- /* These need to use noirq_suspend */
- SYSC_QUIRK("control", 0, 0, 0x10, -1, 0x40000900, 0xffffffff,
- SYSC_QUIRK_RESOURCE_PROVIDER),
- SYSC_QUIRK("i2c", 0, 0, 0x10, 0x90, 0x5040000a, 0xffffffff,
- SYSC_QUIRK_RESOURCE_PROVIDER),
- SYSC_QUIRK("mcspi", 0, 0, 0x10, -1, 0x40300a0b, 0xffffffff,
- SYSC_QUIRK_RESOURCE_PROVIDER),
- SYSC_QUIRK("prcm", 0, 0, -1, -1, 0x40000100, 0xffffffff,
- SYSC_QUIRK_RESOURCE_PROVIDER),
- SYSC_QUIRK("ocp2scp", 0, 0, 0x10, 0x14, 0x50060005, 0xffffffff,
- SYSC_QUIRK_RESOURCE_PROVIDER),
- SYSC_QUIRK("padconf", 0, 0, 0x10, -1, 0x4fff0800, 0xffffffff,
- SYSC_QUIRK_RESOURCE_PROVIDER),
- SYSC_QUIRK("scm", 0, 0, 0x10, -1, 0x40000900, 0xffffffff,
- SYSC_QUIRK_RESOURCE_PROVIDER),
- SYSC_QUIRK("scrm", 0, 0, -1, -1, 0x00000010, 0xffffffff,
- SYSC_QUIRK_RESOURCE_PROVIDER),
- SYSC_QUIRK("sdma", 0, 0, 0x2c, 0x28, 0x00010900, 0xffffffff,
- SYSC_QUIRK_RESOURCE_PROVIDER),
-
/* These drivers need to be fixed to not use pm_runtime_irq_safe() */
SYSC_QUIRK("gpio", 0, 0, 0x10, 0x114, 0x50600801, 0xffffffff,
SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_OPT_CLKS_IN_RESET),
@@ -892,23 +892,25 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x50411e03, 0xffffffff,
SYSC_QUIRK_LEGACY_IDLE),
- /* These devices don't yet suspend properly without legacy setting */
- SYSC_QUIRK("sdio", 0, 0, 0x10, -1, 0x40202301, 0xffffffff,
- SYSC_QUIRK_LEGACY_IDLE),
- SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0500, 0xffffffff,
- SYSC_QUIRK_LEGACY_IDLE),
- SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0d00, 0xffffffff,
- SYSC_QUIRK_LEGACY_IDLE),
-
#ifdef DEBUG
SYSC_QUIRK("aess", 0, 0, 0x10, -1, 0x40000000, 0xffffffff, 0),
+ SYSC_QUIRK("control", 0, 0, 0x10, -1, 0x40000900, 0xffffffff, 0),
SYSC_QUIRK("gpu", 0, 0x1fc00, 0x1fc10, -1, 0, 0, 0),
SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x00000006, 0xffffffff, 0),
SYSC_QUIRK("hsi", 0, 0, 0x10, 0x14, 0x50043101, 0xffffffff, 0),
SYSC_QUIRK("iss", 0, 0, 0x10, -1, 0x40000101, 0xffffffff, 0),
+ SYSC_QUIRK("i2c", 0, 0, 0x10, 0x90, 0x5040000a, 0xffffffff, 0),
SYSC_QUIRK("mcasp", 0, 0, 0x4, -1, 0x44306302, 0xffffffff, 0),
SYSC_QUIRK("mcbsp", 0, -1, 0x8c, -1, 0, 0, 0),
+ SYSC_QUIRK("mcspi", 0, 0, 0x10, -1, 0x40300a0b, 0xffffffff, 0),
SYSC_QUIRK("mailbox", 0, 0, 0x10, -1, 0x00000400, 0xffffffff, 0),
+ SYSC_QUIRK("ocp2scp", 0, 0, 0x10, 0x14, 0x50060005, 0xffffffff, 0),
+ SYSC_QUIRK("padconf", 0, 0, 0x10, -1, 0x4fff0800, 0xffffffff, 0),
+ SYSC_QUIRK("prcm", 0, 0, -1, -1, 0x40000100, 0xffffffff, 0),
+ SYSC_QUIRK("scm", 0, 0, 0x10, -1, 0x40000900, 0xffffffff, 0),
+ SYSC_QUIRK("scrm", 0, 0, -1, -1, 0x00000010, 0xffffffff, 0),
+ SYSC_QUIRK("sdio", 0, 0, 0x10, -1, 0x40202301, 0xffffffff, 0),
+ SYSC_QUIRK("sdma", 0, 0, 0x2c, 0x28, 0x00010900, 0xffffffff, 0),
SYSC_QUIRK("slimbus", 0, 0, 0x10, -1, 0x40000902, 0xffffffff, 0),
SYSC_QUIRK("slimbus", 0, 0, 0x10, -1, 0x40002903, 0xffffffff, 0),
SYSC_QUIRK("spinlock", 0, 0, 0x10, -1, 0x50020000, 0xffffffff, 0),
@@ -916,6 +918,8 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, 0x14, 0x50700100, 0xffffffff, 0),
SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000050,
0xffffffff, 0),
+ SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0500, 0xffffffff, 0),
+ SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0d00, 0xffffffff, 0),
#endif
};
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.