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Subject[PATCH 1/3] clk: at91: optimize pmc data allocation
Alloc whole data structure in one block. This makes the code shorter,
more efficient and easier to extend in following patch.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
drivers/clk/at91/at91sam9260.c | 2 +-
drivers/clk/at91/at91sam9rl.c | 2 +-
drivers/clk/at91/at91sam9x5.c | 2 +-
drivers/clk/at91/pmc.c | 34 ++++++++--------------------------
drivers/clk/at91/pmc.h | 3 ++-
drivers/clk/at91/sama5d2.c | 2 +-
drivers/clk/at91/sama5d4.c | 2 +-
7 files changed, 15 insertions(+), 32 deletions(-)

diff --git a/drivers/clk/at91/at91sam9260.c b/drivers/clk/at91/at91sam9260.c
index a9d4234758d7..946f03a09858 100644
--- a/drivers/clk/at91/at91sam9260.c
+++ b/drivers/clk/at91/at91sam9260.c
@@ -462,7 +462,7 @@ static void __init at91sam926x_pmc_setup(struct device_node *np,
return;

err_free:
- pmc_data_free(at91sam9260_pmc);
+ kfree(at91sam9260_pmc);
}

static void __init at91sam9260_pmc_setup(struct device_node *np)
diff --git a/drivers/clk/at91/at91sam9rl.c b/drivers/clk/at91/at91sam9rl.c
index 77fe83a73bf4..cc739d214ae3 100644
--- a/drivers/clk/at91/at91sam9rl.c
+++ b/drivers/clk/at91/at91sam9rl.c
@@ -166,6 +166,6 @@ static void __init at91sam9rl_pmc_setup(struct device_node *np)
return;

err_free:
- pmc_data_free(at91sam9rl_pmc);
+ kfree(at91sam9rl_pmc);
}
CLK_OF_DECLARE_DRIVER(at91sam9rl_pmc, "atmel,at91sam9rl-pmc", at91sam9rl_pmc_setup);
diff --git a/drivers/clk/at91/at91sam9x5.c b/drivers/clk/at91/at91sam9x5.c
index 086cf0b4955c..aac99d699568 100644
--- a/drivers/clk/at91/at91sam9x5.c
+++ b/drivers/clk/at91/at91sam9x5.c
@@ -278,7 +278,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
return;

err_free:
- pmc_data_free(at91sam9x5_pmc);
+ kfree(at91sam9x5_pmc);
}

static void __init at91sam9g15_pmc_setup(struct device_node *np)
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index b71515acdec1..fe788512fcc0 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -76,48 +76,30 @@ struct clk_hw *of_clk_hw_pmc_get(struct of_phandle_args *clkspec, void *data)
return ERR_PTR(-EINVAL);
}

-void pmc_data_free(struct pmc_data *pmc_data)
-{
- kfree(pmc_data->chws);
- kfree(pmc_data->shws);
- kfree(pmc_data->phws);
- kfree(pmc_data->ghws);
-}
-
struct pmc_data *pmc_data_allocate(unsigned int ncore, unsigned int nsystem,
unsigned int nperiph, unsigned int ngck)
{
- struct pmc_data *pmc_data = kzalloc(sizeof(*pmc_data), GFP_KERNEL);
+ unsigned int num_clks = ncore + nsystem + nperiph + ngck;
+ struct pmc_data *pmc_data;

+ pmc_data = kzalloc(sizeof(*pmc_data) + num_clks * sizeof(struct clk_hw *),
+ GFP_KERNEL);
if (!pmc_data)
return NULL;

pmc_data->ncore = ncore;
- pmc_data->chws = kcalloc(ncore, sizeof(struct clk_hw *), GFP_KERNEL);
- if (!pmc_data->chws)
- goto err;
+ pmc_data->chws = pmc_data->hwtable;

pmc_data->nsystem = nsystem;
- pmc_data->shws = kcalloc(nsystem, sizeof(struct clk_hw *), GFP_KERNEL);
- if (!pmc_data->shws)
- goto err;
+ pmc_data->shws = pmc_data->chws + ncore;

pmc_data->nperiph = nperiph;
- pmc_data->phws = kcalloc(nperiph, sizeof(struct clk_hw *), GFP_KERNEL);
- if (!pmc_data->phws)
- goto err;
+ pmc_data->phws = pmc_data->shws + nsystem;

pmc_data->ngck = ngck;
- pmc_data->ghws = kcalloc(ngck, sizeof(struct clk_hw *), GFP_KERNEL);
- if (!pmc_data->ghws)
- goto err;
+ pmc_data->ghws = pmc_data->phws + nperiph;

return pmc_data;
-
-err:
- pmc_data_free(pmc_data);
-
- return NULL;
}

#ifdef CONFIG_PM
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index 9b8db9cdcda5..49cc3d67b98e 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -24,6 +24,8 @@ struct pmc_data {
struct clk_hw **phws;
unsigned int ngck;
struct clk_hw **ghws;
+
+ struct clk_hw *hwtable[0];
};

struct clk_range {
@@ -95,7 +97,6 @@ struct clk_pcr_layout {
#define nck(a) (a[ARRAY_SIZE(a) - 1].id + 1)
struct pmc_data *pmc_data_allocate(unsigned int ncore, unsigned int nsystem,
unsigned int nperiph, unsigned int ngck);
-void pmc_data_free(struct pmc_data *pmc_data);

int of_at91_get_clk_range(struct device_node *np, const char *propname,
struct clk_range *range);
diff --git a/drivers/clk/at91/sama5d2.c b/drivers/clk/at91/sama5d2.c
index ff7e3f727082..b2560670e5af 100644
--- a/drivers/clk/at91/sama5d2.c
+++ b/drivers/clk/at91/sama5d2.c
@@ -350,6 +350,6 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
return;

err_free:
- pmc_data_free(sama5d2_pmc);
+ kfree(sama5d2_pmc);
}
CLK_OF_DECLARE_DRIVER(sama5d2_pmc, "atmel,sama5d2-pmc", sama5d2_pmc_setup);
diff --git a/drivers/clk/at91/sama5d4.c b/drivers/clk/at91/sama5d4.c
index a6dee4a3b6e4..4ca9a4619500 100644
--- a/drivers/clk/at91/sama5d4.c
+++ b/drivers/clk/at91/sama5d4.c
@@ -267,6 +267,6 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
return;

err_free:
- pmc_data_free(sama5d4_pmc);
+ kfree(sama5d4_pmc);
}
CLK_OF_DECLARE_DRIVER(sama5d4_pmc, "atmel,sama5d4-pmc", sama5d4_pmc_setup);
--
2.20.1
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