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path: root/drivers/clk/ux500/clk-prcmu.c
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Diffstat (limited to 'drivers/clk/ux500/clk-prcmu.c')
-rw-r--r--drivers/clk/ux500/clk-prcmu.c168
1 files changed, 133 insertions, 35 deletions
diff --git a/drivers/clk/ux500/clk-prcmu.c b/drivers/clk/ux500/clk-prcmu.c
index 930cdfeb47a..e2d63bc4743 100644
--- a/drivers/clk/ux500/clk-prcmu.c
+++ b/drivers/clk/ux500/clk-prcmu.c
@@ -20,15 +20,23 @@
struct clk_prcmu {
struct clk_hw hw;
u8 cg_sel;
+ int is_prepared;
int is_enabled;
+ int opp_requested;
};
/* PRCMU clock operations. */
static int clk_prcmu_prepare(struct clk_hw *hw)
{
+ int ret;
struct clk_prcmu *clk = to_clk_prcmu(hw);
- return prcmu_request_clock(clk->cg_sel, true);
+
+ ret = prcmu_request_clock(clk->cg_sel, true);
+ if (!ret)
+ clk->is_prepared = 1;
+
+ return ret;
}
static void clk_prcmu_unprepare(struct clk_hw *hw)
@@ -36,7 +44,15 @@ static void clk_prcmu_unprepare(struct clk_hw *hw)
struct clk_prcmu *clk = to_clk_prcmu(hw);
if (prcmu_request_clock(clk->cg_sel, false))
pr_err("clk_prcmu: %s failed to disable %s.\n", __func__,
- hw->init->name);
+ __clk_get_name(hw->clk));
+ else
+ clk->is_prepared = 0;
+}
+
+static int clk_prcmu_is_prepared(struct clk_hw *hw)
+{
+ struct clk_prcmu *clk = to_clk_prcmu(hw);
+ return clk->is_prepared;
}
static int clk_prcmu_enable(struct clk_hw *hw)
@@ -79,63 +95,102 @@ static int clk_prcmu_set_rate(struct clk_hw *hw, unsigned long rate,
return prcmu_set_clock_rate(clk->cg_sel, rate);
}
-static int request_ape_opp100(bool enable)
+static int clk_prcmu_opp_prepare(struct clk_hw *hw)
{
- static int reqs;
- int err = 0;
+ int err;
+ struct clk_prcmu *clk = to_clk_prcmu(hw);
+
+ if (!clk->opp_requested) {
+ err = prcmu_qos_add_requirement(PRCMU_QOS_APE_OPP,
+ (char *)__clk_get_name(hw->clk),
+ 100);
+ if (err) {
+ pr_err("clk_prcmu: %s fail req APE OPP for %s.\n",
+ __func__, __clk_get_name(hw->clk));
+ return err;
+ }
+ clk->opp_requested = 1;
+ }
- if (enable) {
- if (!reqs)
- err = prcmu_qos_add_requirement(PRCMU_QOS_APE_OPP,
- "clock", 100);
- if (!err)
- reqs++;
- } else {
- reqs--;
- if (!reqs)
- prcmu_qos_remove_requirement(PRCMU_QOS_APE_OPP,
- "clock");
+ err = prcmu_request_clock(clk->cg_sel, true);
+ if (err) {
+ prcmu_qos_remove_requirement(PRCMU_QOS_APE_OPP,
+ (char *)__clk_get_name(hw->clk));
+ clk->opp_requested = 0;
+ return err;
}
- return err;
+
+ clk->is_prepared = 1;
+ return 0;
}
-static int clk_prcmu_opp_prepare(struct clk_hw *hw)
+static void clk_prcmu_opp_unprepare(struct clk_hw *hw)
+{
+ struct clk_prcmu *clk = to_clk_prcmu(hw);
+
+ if (prcmu_request_clock(clk->cg_sel, false)) {
+ pr_err("clk_prcmu: %s failed to disable %s.\n", __func__,
+ __clk_get_name(hw->clk));
+ return;
+ }
+
+ if (clk->opp_requested) {
+ prcmu_qos_remove_requirement(PRCMU_QOS_APE_OPP,
+ (char *)__clk_get_name(hw->clk));
+ clk->opp_requested = 0;
+ }
+
+ clk->is_prepared = 0;
+}
+
+static int clk_prcmu_opp_volt_prepare(struct clk_hw *hw)
{
int err;
struct clk_prcmu *clk = to_clk_prcmu(hw);
- err = request_ape_opp100(true);
- if (err) {
- pr_err("clk_prcmu: %s failed to request APE OPP100 for %s.\n",
- __func__, hw->init->name);
- return err;
+ if (!clk->opp_requested) {
+ err = prcmu_request_ape_opp_100_voltage(true);
+ if (err) {
+ pr_err("clk_prcmu: %s fail req APE OPP VOLT for %s.\n",
+ __func__, __clk_get_name(hw->clk));
+ return err;
+ }
+ clk->opp_requested = 1;
}
err = prcmu_request_clock(clk->cg_sel, true);
- if (err)
- request_ape_opp100(false);
+ if (err) {
+ prcmu_request_ape_opp_100_voltage(false);
+ clk->opp_requested = 0;
+ return err;
+ }
- return err;
+ clk->is_prepared = 1;
+ return 0;
}
-static void clk_prcmu_opp_unprepare(struct clk_hw *hw)
+static void clk_prcmu_opp_volt_unprepare(struct clk_hw *hw)
{
struct clk_prcmu *clk = to_clk_prcmu(hw);
- if (prcmu_request_clock(clk->cg_sel, false))
- goto out_error;
- if (request_ape_opp100(false))
- goto out_error;
- return;
+ if (prcmu_request_clock(clk->cg_sel, false)) {
+ pr_err("clk_prcmu: %s failed to disable %s.\n", __func__,
+ __clk_get_name(hw->clk));
+ return;
+ }
+
+ if (clk->opp_requested) {
+ prcmu_request_ape_opp_100_voltage(false);
+ clk->opp_requested = 0;
+ }
-out_error:
- pr_err("clk_prcmu: %s failed to disable %s.\n", __func__,
- hw->init->name);
+ clk->is_prepared = 0;
}
static struct clk_ops clk_prcmu_scalable_ops = {
.prepare = clk_prcmu_prepare,
.unprepare = clk_prcmu_unprepare,
+ .is_prepared = clk_prcmu_is_prepared,
.enable = clk_prcmu_enable,
.disable = clk_prcmu_disable,
.is_enabled = clk_prcmu_is_enabled,
@@ -147,12 +202,20 @@ static struct clk_ops clk_prcmu_scalable_ops = {
static struct clk_ops clk_prcmu_gate_ops = {
.prepare = clk_prcmu_prepare,
.unprepare = clk_prcmu_unprepare,
+ .is_prepared = clk_prcmu_is_prepared,
.enable = clk_prcmu_enable,
.disable = clk_prcmu_disable,
.is_enabled = clk_prcmu_is_enabled,
.recalc_rate = clk_prcmu_recalc_rate,
};
+static struct clk_ops clk_prcmu_scalable_rate_ops = {
+ .is_enabled = clk_prcmu_is_enabled,
+ .recalc_rate = clk_prcmu_recalc_rate,
+ .round_rate = clk_prcmu_round_rate,
+ .set_rate = clk_prcmu_set_rate,
+};
+
static struct clk_ops clk_prcmu_rate_ops = {
.is_enabled = clk_prcmu_is_enabled,
.recalc_rate = clk_prcmu_recalc_rate,
@@ -161,12 +224,25 @@ static struct clk_ops clk_prcmu_rate_ops = {
static struct clk_ops clk_prcmu_opp_gate_ops = {
.prepare = clk_prcmu_opp_prepare,
.unprepare = clk_prcmu_opp_unprepare,
+ .is_prepared = clk_prcmu_is_prepared,
.enable = clk_prcmu_enable,
.disable = clk_prcmu_disable,
.is_enabled = clk_prcmu_is_enabled,
.recalc_rate = clk_prcmu_recalc_rate,
};
+static struct clk_ops clk_prcmu_opp_volt_scalable_ops = {
+ .prepare = clk_prcmu_opp_volt_prepare,
+ .unprepare = clk_prcmu_opp_volt_unprepare,
+ .is_prepared = clk_prcmu_is_prepared,
+ .enable = clk_prcmu_enable,
+ .disable = clk_prcmu_disable,
+ .is_enabled = clk_prcmu_is_enabled,
+ .recalc_rate = clk_prcmu_recalc_rate,
+ .round_rate = clk_prcmu_round_rate,
+ .set_rate = clk_prcmu_set_rate,
+};
+
static struct clk *clk_reg_prcmu(const char *name,
const char *parent_name,
u8 cg_sel,
@@ -190,7 +266,9 @@ static struct clk *clk_reg_prcmu(const char *name,
}
clk->cg_sel = cg_sel;
+ clk->is_prepared = 1;
clk->is_enabled = 1;
+ clk->opp_requested = 0;
/* "rate" can be used for changing the initial frequency */
if (rate)
prcmu_set_clock_rate(cg_sel, rate);
@@ -233,6 +311,16 @@ struct clk *clk_reg_prcmu_gate(const char *name,
&clk_prcmu_gate_ops);
}
+struct clk *clk_reg_prcmu_scalable_rate(const char *name,
+ const char *parent_name,
+ u8 cg_sel,
+ unsigned long rate,
+ unsigned long flags)
+{
+ return clk_reg_prcmu(name, parent_name, cg_sel, rate, flags,
+ &clk_prcmu_scalable_rate_ops);
+}
+
struct clk *clk_reg_prcmu_rate(const char *name,
const char *parent_name,
u8 cg_sel,
@@ -250,3 +338,13 @@ struct clk *clk_reg_prcmu_opp_gate(const char *name,
return clk_reg_prcmu(name, parent_name, cg_sel, 0, flags,
&clk_prcmu_opp_gate_ops);
}
+
+struct clk *clk_reg_prcmu_opp_volt_scalable(const char *name,
+ const char *parent_name,
+ u8 cg_sel,
+ unsigned long rate,
+ unsigned long flags)
+{
+ return clk_reg_prcmu(name, parent_name, cg_sel, rate, flags,
+ &clk_prcmu_opp_volt_scalable_ops);
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 00:00:46 +0000