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-rw-r--r--drivers/bus/ti-sysc.c140
1 files changed, 115 insertions, 25 deletions
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index e12d1580f21d..f27b182384cd 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -32,10 +32,18 @@ static const char * const reg_names[] = { "rev", "sysc", "syss", };
enum sysc_clocks {
SYSC_FCK,
SYSC_ICK,
+ SYSC_OPTFCK0,
+ SYSC_OPTFCK1,
+ SYSC_OPTFCK2,
+ SYSC_OPTFCK3,
+ SYSC_OPTFCK4,
+ SYSC_OPTFCK5,
+ SYSC_OPTFCK6,
+ SYSC_OPTFCK7,
SYSC_MAX_CLOCKS,
};
-static const char * const clock_names[] = { "fck", "ick", };
+static const char * const clock_names[SYSC_ICK + 1] = { "fck", "ick", };
#define SYSC_IDLEMODE_MASK 3
#define SYSC_CLOCKACTIVITY_MASK 3
@@ -48,6 +56,8 @@ static const char * const clock_names[] = { "fck", "ick", };
* @module_va: virtual address of the interconnect target module
* @offsets: register offsets from module base
* @clocks: clocks used by the interconnect target module
+ * @clock_roles: clock role names for the found clocks
+ * @nr_clocks: number of clocks used by the interconnect target module
* @legacy_mode: configured for legacy mode if set
* @cap: interconnect target module capabilities
* @cfg: interconnect target module configuration
@@ -61,7 +71,9 @@ struct sysc {
u32 module_size;
void __iomem *module_va;
int offsets[SYSC_MAX_REGS];
- struct clk *clocks[SYSC_MAX_CLOCKS];
+ struct clk **clocks;
+ const char **clock_roles;
+ int nr_clocks;
const char *legacy_mode;
const struct sysc_capabilities *cap;
struct sysc_config cfg;
@@ -88,6 +100,11 @@ static u32 sysc_read(struct sysc *ddata, int offset)
return readl_relaxed(ddata->module_va + offset);
}
+static bool sysc_opt_clks_needed(struct sysc *ddata)
+{
+ return !!(ddata->cfg.quirks & SYSC_QUIRK_OPT_CLKS_NEEDED);
+}
+
static u32 sysc_read_revision(struct sysc *ddata)
{
int offset = ddata->offsets[SYSC_REVISION];
@@ -98,21 +115,28 @@ static u32 sysc_read_revision(struct sysc *ddata)
return sysc_read(ddata, offset);
}
-static int sysc_get_one_clock(struct sysc *ddata,
- enum sysc_clocks index)
+static int sysc_get_one_clock(struct sysc *ddata, const char *name)
{
- const char *name;
- int error;
+ int error, i, index = -ENODEV;
+
+ if (!strncmp(clock_names[SYSC_FCK], name, 3))
+ index = SYSC_FCK;
+ else if (!strncmp(clock_names[SYSC_ICK], name, 3))
+ index = SYSC_ICK;
+
+ if (index < 0) {
+ for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) {
+ if (!clock_names[i]) {
+ index = i;
+ break;
+ }
+ }
+ }
- switch (index) {
- case SYSC_FCK:
- break;
- case SYSC_ICK:
- break;
- default:
- return -EINVAL;
+ if (index < 0) {
+ dev_err(ddata->dev, "clock %s not added\n", name);
+ return index;
}
- name = clock_names[index];
ddata->clocks[index] = devm_clk_get(ddata->dev, name);
if (IS_ERR(ddata->clocks[index])) {
@@ -138,10 +162,50 @@ static int sysc_get_one_clock(struct sysc *ddata,
static int sysc_get_clocks(struct sysc *ddata)
{
- int i, error;
+ struct device_node *np = ddata->dev->of_node;
+ struct property *prop;
+ const char *name;
+ int nr_fck = 0, nr_ick = 0, i, error = 0;
- for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
- error = sysc_get_one_clock(ddata, i);
+ ddata->clock_roles = devm_kzalloc(ddata->dev,
+ sizeof(*ddata->clock_roles) *
+ SYSC_MAX_CLOCKS,
+ GFP_KERNEL);
+ if (!ddata->clock_roles)
+ return -ENOMEM;
+
+ of_property_for_each_string(np, "clock-names", prop, name) {
+ if (!strncmp(clock_names[SYSC_FCK], name, 3))
+ nr_fck++;
+ if (!strncmp(clock_names[SYSC_ICK], name, 3))
+ nr_ick++;
+ ddata->clock_roles[ddata->nr_clocks] = name;
+ ddata->nr_clocks++;
+ }
+
+ if (ddata->nr_clocks < 1)
+ return 0;
+
+ if (ddata->nr_clocks > SYSC_MAX_CLOCKS) {
+ dev_err(ddata->dev, "too many clocks for %pOF\n", np);
+
+ return -EINVAL;
+ }
+
+ if (nr_fck > 1 || nr_ick > 1) {
+ dev_err(ddata->dev, "max one fck and ick for %pOF\n", np);
+
+ return -EINVAL;
+ }
+
+ ddata->clocks = devm_kzalloc(ddata->dev,
+ sizeof(*ddata->clocks) * ddata->nr_clocks,
+ GFP_KERNEL);
+ if (!ddata->clocks)
+ return -ENOMEM;
+
+ for (i = 0; i < ddata->nr_clocks; i++) {
+ error = sysc_get_one_clock(ddata, ddata->clock_roles[i]);
if (error && error != -ENOENT)
return error;
}
@@ -533,9 +597,13 @@ static int __maybe_unused sysc_runtime_suspend(struct device *dev)
goto idled;
}
- for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
+ for (i = 0; i < ddata->nr_clocks; i++) {
if (IS_ERR_OR_NULL(ddata->clocks[i]))
continue;
+
+ if (i >= SYSC_OPTFCK0 && !sysc_opt_clks_needed(ddata))
+ break;
+
clk_disable(ddata->clocks[i]);
}
@@ -572,9 +640,13 @@ static int __maybe_unused sysc_runtime_resume(struct device *dev)
goto awake;
}
- for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
+ for (i = 0; i < ddata->nr_clocks; i++) {
if (IS_ERR_OR_NULL(ddata->clocks[i]))
continue;
+
+ if (i >= SYSC_OPTFCK0 && !sysc_opt_clks_needed(ddata))
+ break;
+
error = clk_enable(ddata->clocks[i]);
if (error)
return error;
@@ -651,7 +723,7 @@ struct sysc_revision_quirk {
static const struct sysc_revision_quirk sysc_revision_quirks[] = {
/* 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_LEGACY_IDLE | SYSC_QUIRK_OPT_CLKS_IN_RESET),
SYSC_QUIRK("mmu", 0, 0, 0x10, 0x14, 0x00000020, 0xffffffff,
SYSC_QUIRK_LEGACY_IDLE),
SYSC_QUIRK("mmu", 0, 0, 0x10, 0x14, 0x00000030, 0xffffffff,
@@ -845,6 +917,26 @@ static int sysc_child_add_named_clock(struct sysc *ddata,
return error;
}
+static int sysc_child_add_clocks(struct sysc *ddata,
+ struct device *child)
+{
+ int i, error;
+
+ for (i = 0; i < ddata->nr_clocks; i++) {
+ error = sysc_child_add_named_clock(ddata,
+ child,
+ ddata->clock_roles[i]);
+ if (error && error != -EEXIST) {
+ dev_err(ddata->dev, "could not add child clock %s: %i\n",
+ ddata->clock_roles[i], error);
+
+ return error;
+ }
+ }
+
+ return 0;
+}
+
static struct device_type sysc_device_type = {
};
@@ -992,11 +1084,9 @@ static int sysc_notifier_call(struct notifier_block *nb,
switch (event) {
case BUS_NOTIFY_ADD_DEVICE:
- error = sysc_child_add_named_clock(ddata, dev,
- clock_names[SYSC_FCK]);
- if (error && error != -EEXIST)
- dev_warn(ddata->dev, "could not add %s fck: %i\n",
- dev_name(dev), error);
+ error = sysc_child_add_clocks(ddata, dev);
+ if (error)
+ return error;
sysc_legacy_idle_quirk(ddata, dev);
break;
default:
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-03 21:30:08 +0300