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From: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
To: Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>,
	Nicolas Ferre <nicolas.ferre@microchip.com>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 1/3] clk: at91: optimize pmc data allocation
Date: Sun, 15 Mar 2020 19:38:05 +0100	[thread overview]
Message-ID: <744f7b9da075e63ebc4400125cebfe63fabe3d2e.1584296940.git.mirq-linux@rere.qmqm.pl> (raw)
In-Reply-To: <cover.1584296940.git.mirq-linux@rere.qmqm.pl>

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


  parent reply	other threads:[~2020-03-15 18:38 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-15 18:38 [PATCH 0/3] clk: at91: support configuring PCKx parent via DT Michał Mirosław
2020-03-15 18:38 ` [PATCH 2/3] clk: at91: allow setting " Michał Mirosław
2020-03-16 23:04   ` kbuild test robot
2020-03-15 18:38 ` Michał Mirosław [this message]
2020-03-16 22:05   ` [PATCH 1/3] clk: at91: optimize pmc data allocation kbuild test robot
2020-03-15 18:38 ` [PATCH 3/3] clk: at91: sama5d2: allow setting all PMC clock parents via DT Michał Mirosław

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