Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1468319

[PATCH 2/2] clk: mvebu: dynamically allocate resources in Armada CP110 system controller

Show all headers | View raw

Original commit, which added support for Armada CP110 system controller
used global variables for storing all clock information. It worked
fine for Armada 7k SoC, with single CP110 block. After dual-CP110 Armada 8k
was introduced, the data got overwritten and corrupted.

This patch fixes the issue by allocating resources dynamically in the
driver probe and storing it as platform drvdata.

Fixes: d3da3eaef7f4 ("clk: mvebu: new driver for Armada CP110 system ...")

Signed-off-by: Marcin Wojtas <mw@semihalf.com>
---
 drivers/clk/mvebu/cp110-system-controller.c | 29 ++++++++++++++++++++---------
 1 file changed, 20 insertions(+), 9 deletions(-)

diff --git a/drivers/clk/mvebu/cp110-system-controller.c b/drivers/clk/mvebu/cp110-system-controller.c
index 0835e1d..2bd87d2 100644
--- a/drivers/clk/mvebu/cp110-system-controller.c
+++ b/drivers/clk/mvebu/cp110-system-controller.c
@@ -81,13 +81,6 @@ enum {
 #define CP110_GATE_EIP150		25
 #define CP110_GATE_EIP197		26
 
-static struct clk *cp110_clks[CP110_CLK_NUM];
-
-static struct clk_onecell_data cp110_clk_data = {
-	.clks = cp110_clks,
-	.clk_num = CP110_CLK_NUM,
-};
-
 struct cp110_gate_clk {
 	struct clk_hw hw;
 	struct regmap *regmap;
@@ -195,7 +188,8 @@ static int cp110_syscon_clk_probe(struct platform_device *pdev)
 	struct regmap *regmap;
 	struct device_node *np = pdev->dev.of_node;
 	const char *ppv2_name, *apll_name, *core_name, *eip_name, *nand_name;
-	struct clk *clk;
+	struct clk_onecell_data *cp110_clk_data;
+	struct clk *clk, **cp110_clks;
 	u32 nand_clk_ctrl;
 	int i, ret;
 
@@ -208,6 +202,20 @@ static int cp110_syscon_clk_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
+	cp110_clks = devm_kcalloc(&pdev->dev, sizeof(struct clk *),
+				  CP110_CLK_NUM, GFP_KERNEL);
+	if (IS_ERR(cp110_clks))
+		return PTR_ERR(cp110_clks);
+
+	cp110_clk_data = devm_kzalloc(&pdev->dev,
+				      sizeof(struct clk_onecell_data),
+				      GFP_KERNEL);
+	if (IS_ERR(cp110_clk_data))
+		return PTR_ERR(cp110_clk_data);
+
+	cp110_clk_data->clks = cp110_clks;
+	cp110_clk_data->clk_num = CP110_CLK_NUM;
+
 	/* Register the APLL which is the root of the clk tree */
 	of_property_read_string_index(np, "core-clock-output-names",
 				      CP110_CORE_APLL, &apll_name);
@@ -335,10 +343,12 @@ static int cp110_syscon_clk_probe(struct platform_device *pdev)
 		cp110_clks[CP110_MAX_CORE_CLOCKS + i] = clk;
 	}
 
-	ret = of_clk_add_provider(np, cp110_of_clk_get, &cp110_clk_data);
+	ret = of_clk_add_provider(np, cp110_of_clk_get, cp110_clk_data);
 	if (ret)
 		goto fail_clk_add;
 
+	platform_set_drvdata(pdev, cp110_clks);
+
 	return 0;
 
 fail_clk_add:
@@ -365,6 +375,7 @@ fail0:
 
 static int cp110_syscon_clk_remove(struct platform_device *pdev)
 {
+	struct clk **cp110_clks = platform_get_drvdata(pdev);
 	int i;
 
 	of_clk_del_provider(pdev->dev.of_node);
-- 
1.8.3.1

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH 0/2] Armada 7k/8k CP110 system controller fixes Marcin Wojtas <mw@semihalf.com> - 2016-08-23 08:30 +0200
  [PATCH 2/2] clk: mvebu: dynamically allocate resources in Armada CP110 system controller Marcin Wojtas <mw@semihalf.com> - 2016-08-23 08:30 +0200
    Re: [PATCH 2/2] clk: mvebu: dynamically allocate resources in Armada  CP110 system controller Stephen Boyd <sboyd@codeaurora.org> - 2016-08-25 07:10 +0200
  [PATCH 1/2] clk: mvebu: set flags in CP110 gate clock Marcin Wojtas <mw@semihalf.com> - 2016-08-23 08:30 +0200
    Re: [PATCH 1/2] clk: mvebu: set flags in CP110 gate clock Andrew Lunn <andrew@lunn.ch> - 2016-08-23 16:20 +0200
      Re: [PATCH 1/2] clk: mvebu: set flags in CP110 gate clock Marcin Wojtas <mw@semihalf.com> - 2016-08-24 11:00 +0200
    Re: [PATCH 1/2] clk: mvebu: set flags in CP110 gate clock Stephen Boyd <sboyd@codeaurora.org> - 2016-08-25 07:10 +0200

csiph-web