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clk: ux500: Support prcmu ape opp voltage clock

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Some scalable prcmu clocks needs to be handled in conjuction with the
ape opp 100 voltage. A new prcmu clock type clk_prcmu_opp_volt_scalable
is implemented to handle this.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Ulf Hansson 2012-09-24 16:43:18 +02:00 committed by Mike Turquette
parent 686f871b71
commit b0ea0fc753
2 changed files with 61 additions and 0 deletions
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55
drivers/clk/ux500/clk-prcmu.c
View File

@ -133,6 +133,40 @@ static void clk_prcmu_opp_unprepare(struct clk_hw *hw)
hw->init->name);
}
static int clk_prcmu_opp_volt_prepare(struct clk_hw *hw)
{
int err;
struct clk_prcmu *clk = to_clk_prcmu(hw);
err = prcmu_request_ape_opp_100_voltage(true);
if (err) {
pr_err("clk_prcmu: %s failed to request APE OPP VOLT for %s.\n",
__func__, hw->init->name);
return err;
}
err = prcmu_request_clock(clk->cg_sel, true);
if (err)
prcmu_request_ape_opp_100_voltage(false);
return err;
}
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 (prcmu_request_ape_opp_100_voltage(false))
goto out_error;
return;
out_error:
pr_err("clk_prcmu: %s failed to disable %s.\n", __func__,
hw->init->name);
}
static struct clk_ops clk_prcmu_scalable_ops = {
.prepare = clk_prcmu_prepare,
.unprepare = clk_prcmu_unprepare,
@ -167,6 +201,17 @@ static struct clk_ops clk_prcmu_opp_gate_ops = {
.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,
.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,
@ -250,3 +295,13 @@ 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);
}

6
drivers/clk/ux500/clk.h
View File

@ -45,4 +45,10 @@ struct clk *clk_reg_prcmu_opp_gate(const char *name,
u8 cg_sel,
unsigned long flags);
struct clk *clk_reg_prcmu_opp_volt_scalable(const char *name,
const char *parent_name,
u8 cg_sel,
unsigned long rate,
unsigned long flags);
#endif /* __UX500_CLK_H */