Re: [PATCH] clk: at91: clk-master: remove dead code
From: Nicolas Ferre
Date: Thu Feb 03 2022 - 06:15:51 EST
On 03/02/2022 at 12:02, Claudiu Beznea wrote:
Commit facb87ad7560 ("clk: at91: sama7g5: remove prescaler part of master
clock") removed the master clock's prescaler from clock tree of SAMA7G5
as it has been discovered that there is a hardware bug when trying to
change it at run-time (bug is described in description of
commit facb87ad7560 ("clk: at91: sama7g5: remove prescaler part of master
clock")). This was previously changed at CPUFreq driver request. Thus, with
commit facb87ad7560 ("clk: at91: sama7g5: remove prescaler part of master
clock") there is no need of code that handles run-time changes of master
clock's prescaler, thus remove this code.
Signed-off-by: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx>
It looks good to me:
Acked-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxxxxxx>
Thanks Claudiu.
Best regards,
Nicolas
---
drivers/clk/at91/at91rm9200.c | 3 +-
drivers/clk/at91/at91sam9260.c | 3 +-
drivers/clk/at91/at91sam9g45.c | 3 +-
drivers/clk/at91/at91sam9n12.c | 3 +-
drivers/clk/at91/at91sam9rl.c | 3 +-
drivers/clk/at91/at91sam9x5.c | 3 +-
drivers/clk/at91/clk-master.c | 117 ++-------------------------------
drivers/clk/at91/dt-compat.c | 3 +-
drivers/clk/at91/pmc.h | 2 +-
drivers/clk/at91/sam9x60.c | 3 +-
drivers/clk/at91/sama5d2.c | 3 +-
drivers/clk/at91/sama5d3.c | 3 +-
drivers/clk/at91/sama5d4.c | 3 +-
13 files changed, 18 insertions(+), 134 deletions(-)
diff --git a/drivers/clk/at91/at91rm9200.c b/drivers/clk/at91/at91rm9200.c
index fff4fdda974f..b174f727a8ef 100644
--- a/drivers/clk/at91/at91rm9200.c
+++ b/drivers/clk/at91/at91rm9200.c
@@ -143,8 +143,7 @@ static void __init at91rm9200_pmc_setup(struct device_node *np)
parent_names,
&at91rm9200_master_layout,
&rm9200_mck_characteristics,
- &rm9200_mck_lock, CLK_SET_RATE_GATE,
- INT_MIN);
+ &rm9200_mck_lock);
if (IS_ERR(hw))
goto err_free;
diff --git a/drivers/clk/at91/at91sam9260.c b/drivers/clk/at91/at91sam9260.c
index 79802f864ee5..11550e50cd9f 100644
--- a/drivers/clk/at91/at91sam9260.c
+++ b/drivers/clk/at91/at91sam9260.c
@@ -419,8 +419,7 @@ static void __init at91sam926x_pmc_setup(struct device_node *np,
parent_names,
&at91rm9200_master_layout,
data->mck_characteristics,
- &at91sam9260_mck_lock,
- CLK_SET_RATE_GATE, INT_MIN);
+ &at91sam9260_mck_lock);
if (IS_ERR(hw))
goto err_free;
diff --git a/drivers/clk/at91/at91sam9g45.c b/drivers/clk/at91/at91sam9g45.c
index 7ed984f8058c..8c9344451f46 100644
--- a/drivers/clk/at91/at91sam9g45.c
+++ b/drivers/clk/at91/at91sam9g45.c
@@ -154,8 +154,7 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np)
parent_names,
&at91rm9200_master_layout,
&mck_characteristics,
- &at91sam9g45_mck_lock,
- CLK_SET_RATE_GATE, INT_MIN);
+ &at91sam9g45_mck_lock);
if (IS_ERR(hw))
goto err_free;
diff --git a/drivers/clk/at91/at91sam9n12.c b/drivers/clk/at91/at91sam9n12.c
index 63cc58944b00..0bb19400d199 100644
--- a/drivers/clk/at91/at91sam9n12.c
+++ b/drivers/clk/at91/at91sam9n12.c
@@ -181,8 +181,7 @@ static void __init at91sam9n12_pmc_setup(struct device_node *np)
parent_names,
&at91sam9x5_master_layout,
&mck_characteristics,
- &at91sam9n12_mck_lock,
- CLK_SET_RATE_GATE, INT_MIN);
+ &at91sam9n12_mck_lock);
if (IS_ERR(hw))
goto err_free;
diff --git a/drivers/clk/at91/at91sam9rl.c b/drivers/clk/at91/at91sam9rl.c
index 4d4faf6c61d8..b992137bab02 100644
--- a/drivers/clk/at91/at91sam9rl.c
+++ b/drivers/clk/at91/at91sam9rl.c
@@ -123,8 +123,7 @@ static void __init at91sam9rl_pmc_setup(struct device_node *np)
parent_names,
&at91rm9200_master_layout,
&sam9rl_mck_characteristics,
- &sam9rl_mck_lock, CLK_SET_RATE_GATE,
- INT_MIN);
+ &sam9rl_mck_lock);
if (IS_ERR(hw))
goto err_free;
diff --git a/drivers/clk/at91/at91sam9x5.c b/drivers/clk/at91/at91sam9x5.c
index bd8007b4f3e0..3857db2e144b 100644
--- a/drivers/clk/at91/at91sam9x5.c
+++ b/drivers/clk/at91/at91sam9x5.c
@@ -201,8 +201,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
parent_names,
&at91sam9x5_master_layout,
- &mck_characteristics, &mck_lock,
- CLK_SET_RATE_GATE, INT_MIN);
+ &mck_characteristics, &mck_lock);
if (IS_ERR(hw))
goto err_free;
diff --git a/drivers/clk/at91/clk-master.c b/drivers/clk/at91/clk-master.c
index b2d0a7f4f7f9..164e2959c7cf 100644
--- a/drivers/clk/at91/clk-master.c
+++ b/drivers/clk/at91/clk-master.c
@@ -374,85 +374,6 @@ static void clk_sama7g5_master_best_diff(struct clk_rate_request *req,
}
}
-static int clk_master_pres_determine_rate(struct clk_hw *hw,
- struct clk_rate_request *req)
-{
- struct clk_master *master = to_clk_master(hw);
- struct clk_rate_request req_parent = *req;
- const struct clk_master_characteristics *characteristics =
- master->characteristics;
- struct clk_hw *parent;
- long best_rate = LONG_MIN, best_diff = LONG_MIN;
- u32 pres;
- int i;
-
- if (master->chg_pid < 0)
- return -EOPNOTSUPP;
-
- parent = clk_hw_get_parent_by_index(hw, master->chg_pid);
- if (!parent)
- return -EOPNOTSUPP;
-
- for (i = 0; i <= MASTER_PRES_MAX; i++) {
- if (characteristics->have_div3_pres && i == MASTER_PRES_MAX)
- pres = 3;
- else
- pres = 1 << i;
-
- req_parent.rate = req->rate * pres;
- if (__clk_determine_rate(parent, &req_parent))
- continue;
-
- clk_sama7g5_master_best_diff(req, parent, req_parent.rate,
- &best_diff, &best_rate, pres);
- if (!best_diff)
- break;
- }
-
- return 0;
-}
-
-static int clk_master_pres_set_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long parent_rate)
-{
- struct clk_master *master = to_clk_master(hw);
- unsigned long flags;
- unsigned int pres, mckr, tmp;
- int ret;
-
- pres = DIV_ROUND_CLOSEST(parent_rate, rate);
- if (pres > MASTER_PRES_MAX)
- return -EINVAL;
-
- else if (pres == 3)
- pres = MASTER_PRES_MAX;
- else if (pres)
- pres = ffs(pres) - 1;
-
- spin_lock_irqsave(master->lock, flags);
- ret = regmap_read(master->regmap, master->layout->offset, &mckr);
- if (ret)
- goto unlock;
-
- mckr &= master->layout->mask;
- tmp = (mckr >> master->layout->pres_shift) & MASTER_PRES_MASK;
- if (pres == tmp)
- goto unlock;
-
- mckr &= ~(MASTER_PRES_MASK << master->layout->pres_shift);
- mckr |= (pres << master->layout->pres_shift);
- ret = regmap_write(master->regmap, master->layout->offset, mckr);
- if (ret)
- goto unlock;
-
- while (!clk_master_ready(master))
- cpu_relax();
-unlock:
- spin_unlock_irqrestore(master->lock, flags);
-
- return ret;
-}
-
static unsigned long clk_master_pres_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
@@ -539,13 +460,6 @@ static void clk_master_pres_restore_context(struct clk_hw *hw)
pr_warn("MCKR PRES was not configured properly by firmware!\n");
}
-static void clk_master_pres_restore_context_chg(struct clk_hw *hw)
-{
- struct clk_master *master = to_clk_master(hw);
-
- clk_master_pres_set_rate(hw, master->pms.rate, master->pms.parent_rate);
-}
-
static const struct clk_ops master_pres_ops = {
.prepare = clk_master_prepare,
.is_prepared = clk_master_is_prepared,
@@ -555,25 +469,13 @@ static const struct clk_ops master_pres_ops = {
.restore_context = clk_master_pres_restore_context,
};
-static const struct clk_ops master_pres_ops_chg = {
- .prepare = clk_master_prepare,
- .is_prepared = clk_master_is_prepared,
- .determine_rate = clk_master_pres_determine_rate,
- .recalc_rate = clk_master_pres_recalc_rate,
- .get_parent = clk_master_pres_get_parent,
- .set_rate = clk_master_pres_set_rate,
- .save_context = clk_master_pres_save_context,
- .restore_context = clk_master_pres_restore_context_chg,
-};
-
static struct clk_hw * __init
at91_clk_register_master_internal(struct regmap *regmap,
const char *name, int num_parents,
const char **parent_names,
const struct clk_master_layout *layout,
const struct clk_master_characteristics *characteristics,
- const struct clk_ops *ops, spinlock_t *lock, u32 flags,
- int chg_pid)
+ const struct clk_ops *ops, spinlock_t *lock, u32 flags)
{
struct clk_master *master;
struct clk_init_data init;
@@ -599,7 +501,6 @@ at91_clk_register_master_internal(struct regmap *regmap,
master->layout = layout;
master->characteristics = characteristics;
master->regmap = regmap;
- master->chg_pid = chg_pid;
master->lock = lock;
if (ops == &master_div_ops_chg) {
@@ -628,19 +529,13 @@ at91_clk_register_master_pres(struct regmap *regmap,
const char **parent_names,
const struct clk_master_layout *layout,
const struct clk_master_characteristics *characteristics,
- spinlock_t *lock, u32 flags, int chg_pid)
+ spinlock_t *lock)
{
- const struct clk_ops *ops;
-
- if (flags & CLK_SET_RATE_GATE)
- ops = &master_pres_ops;
- else
- ops = &master_pres_ops_chg;
-
return at91_clk_register_master_internal(regmap, name, num_parents,
parent_names, layout,
- characteristics, ops,
- lock, flags, chg_pid);
+ characteristics,
+ &master_pres_ops,
+ lock, CLK_SET_RATE_GATE);
}
struct clk_hw * __init
@@ -661,7 +556,7 @@ at91_clk_register_master_div(struct regmap *regmap,
hw = at91_clk_register_master_internal(regmap, name, 1,
&parent_name, layout,
characteristics, ops,
- lock, flags, -EINVAL);
+ lock, flags);
if (!IS_ERR(hw) && safe_div) {
master_div = to_clk_master(hw);
diff --git a/drivers/clk/at91/dt-compat.c b/drivers/clk/at91/dt-compat.c
index ca2dbb65b9df..8ca8bcacf66d 100644
--- a/drivers/clk/at91/dt-compat.c
+++ b/drivers/clk/at91/dt-compat.c
@@ -392,8 +392,7 @@ of_at91_clk_master_setup(struct device_node *np,
hw = at91_clk_register_master_pres(regmap, "masterck_pres", num_parents,
parent_names, layout,
- characteristics, &mck_lock,
- CLK_SET_RATE_GATE, INT_MIN);
+ characteristics, &mck_lock);
if (IS_ERR(hw))
goto out_free_characteristics;
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index 3a1bf6194c28..efe4975bddc3 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -175,7 +175,7 @@ at91_clk_register_master_pres(struct regmap *regmap, const char *name,
int num_parents, const char **parent_names,
const struct clk_master_layout *layout,
const struct clk_master_characteristics *characteristics,
- spinlock_t *lock, u32 flags, int chg_pid);
+ spinlock_t *lock);
struct clk_hw * __init
at91_clk_register_master_div(struct regmap *regmap, const char *name,
diff --git a/drivers/clk/at91/sam9x60.c b/drivers/clk/at91/sam9x60.c
index 5c264185f261..9ea4ce501bad 100644
--- a/drivers/clk/at91/sam9x60.c
+++ b/drivers/clk/at91/sam9x60.c
@@ -271,8 +271,7 @@ static void __init sam9x60_pmc_setup(struct device_node *np)
parent_names[2] = "pllack_divck";
hw = at91_clk_register_master_pres(regmap, "masterck_pres", 3,
parent_names, &sam9x60_master_layout,
- &mck_characteristics, &mck_lock,
- CLK_SET_RATE_GATE, INT_MIN);
+ &mck_characteristics, &mck_lock);
if (IS_ERR(hw))
goto err_free;
diff --git a/drivers/clk/at91/sama5d2.c b/drivers/clk/at91/sama5d2.c
index f479e39e3bb2..cfd0f5e23b99 100644
--- a/drivers/clk/at91/sama5d2.c
+++ b/drivers/clk/at91/sama5d2.c
@@ -242,8 +242,7 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
parent_names,
&at91sam9x5_master_layout,
- &mck_characteristics, &mck_lock,
- CLK_SET_RATE_GATE, INT_MIN);
+ &mck_characteristics, &mck_lock);
if (IS_ERR(hw))
goto err_free;
diff --git a/drivers/clk/at91/sama5d3.c b/drivers/clk/at91/sama5d3.c
index 339d0f382ff0..7e93c6edf305 100644
--- a/drivers/clk/at91/sama5d3.c
+++ b/drivers/clk/at91/sama5d3.c
@@ -175,8 +175,7 @@ static void __init sama5d3_pmc_setup(struct device_node *np)
hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
parent_names,
&at91sam9x5_master_layout,
- &mck_characteristics, &mck_lock,
- CLK_SET_RATE_GATE, INT_MIN);
+ &mck_characteristics, &mck_lock);
if (IS_ERR(hw))
goto err_free;
diff --git a/drivers/clk/at91/sama5d4.c b/drivers/clk/at91/sama5d4.c
index 4af75b1e39e9..1a14a9bce308 100644
--- a/drivers/clk/at91/sama5d4.c
+++ b/drivers/clk/at91/sama5d4.c
@@ -190,8 +190,7 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
parent_names,
&at91sam9x5_master_layout,
- &mck_characteristics, &mck_lock,
- CLK_SET_RATE_GATE, INT_MIN);
+ &mck_characteristics, &mck_lock);
if (IS_ERR(hw))
goto err_free;
--
Nicolas Ferre