[PATCH v4 0/3] clk: s2mps11: Fixes and add support for S2MPS14 clocks

[PATCH v4 0/3] clk: s2mps11: Fixes and add support for S2MPS14 clocks

[Krzysztof Kozlowski]

Hi,


This is actually a resend of previous patches, rebased on latest
3.15-rc5. There are no changes, beside rebasing.

The first two fixes were posted previously as separate patches and they
didn't get review [1]. I am attaching them here.
The last patch adds support for S2MPS14 device and already was
reviewed/acked [2].

Mike, could you pick them up or should they go through MFD tree?


[1] https://lkml.org/lkml/2014/4/7/42
[2] http://thread.gmane.org/gmane.linux.kernel.samsung-soc/28039/focus=310279


Changes since v3:
=================
1. Add Mike's acked-by (see [2]).
2. Rebase patch 3/3 on the fixes (patches 1 and 2).
3. Rebase on v3.15-rc5-157-g60b5f90d0fac

Changes since v2:
=================
1. Patch 2/3: Remove MFD cells of_compatible which aren't used by child
   drivers and are not documented.
2. Added Tomasz's Review-by.

Changes since v1:
=================
1. Patch 1/3: Update driver description in Kconfig.
2. Patch 2/3: Add of_compatible to all MFD cells.
3. Add Yadwinder's Review-by.


Best regards,
Krzysztof


Krzysztof Kozlowski (3):
  clk: s2mps11: Add missing of_node_put and of_clk_del_provider
  clk: s2mps11: Remove useless check for clk_table
  clk: s2mps11: Add support for S2MPS14 clocks

 drivers/clk/Kconfig       |  8 ++---
 drivers/clk/clk-s2mps11.c | 88 +++++++++++++++++++++++++++++++++--------------
 2 files changed, 66 insertions(+), 30 deletions(-)

-- 
1.9.1

[PATCH v4 1/3] clk: s2mps11: Add missing of_node_put and of_clk_del_provider

[Krzysztof Kozlowski]

Add of_clk_del_provider to remove previously registered clock provider.
Add of_node_put to decrement the ref count of clock nodes.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
---
 drivers/clk/clk-s2mps11.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/clk-s2mps11.c b/drivers/clk/clk-s2mps11.c
index f2f62a1bf61a..843ec3646501 100644
--- a/drivers/clk/clk-s2mps11.c
+++ b/drivers/clk/clk-s2mps11.c
@@ -44,6 +44,7 @@ enum {
 
 struct s2mps11_clk {
 	struct sec_pmic_dev *iodev;
+	struct device_node *clk_np;
 	struct clk_hw hw;
 	struct clk *clk;
 	struct clk_lookup *lookup;
@@ -156,7 +157,6 @@ static int s2mps11_clk_probe(struct platform_device *pdev)
 {
 	struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 	struct s2mps11_clk *s2mps11_clks, *s2mps11_clk;
-	struct device_node *clk_np = NULL;
 	unsigned int s2mps11_reg;
 	int i, ret = 0;
 	u32 val;
@@ -168,9 +168,10 @@ static int s2mps11_clk_probe(struct platform_device *pdev)
 
 	s2mps11_clk = s2mps11_clks;
 
-	clk_np = s2mps11_clk_parse_dt(pdev);
-	if (IS_ERR(clk_np))
-		return PTR_ERR(clk_np);
+	/* Store clocks of_node in first element of s2mps11_clks array */
+	s2mps11_clks->clk_np = s2mps11_clk_parse_dt(pdev);
+	if (IS_ERR(s2mps11_clks->clk_np))
+		return PTR_ERR(s2mps11_clks->clk_np);
 
 	switch(platform_get_device_id(pdev)->driver_data) {
 	case S2MPS11X:
@@ -225,7 +226,8 @@ static int s2mps11_clk_probe(struct platform_device *pdev)
 
 		clk_data.clks = clk_table;
 		clk_data.clk_num = S2MPS11_CLKS_NUM;
-		of_clk_add_provider(clk_np, of_clk_src_onecell_get, &clk_data);
+		of_clk_add_provider(s2mps11_clks->clk_np,
+				of_clk_src_onecell_get, &clk_data);
 	}
 
 	platform_set_drvdata(pdev, s2mps11_clks);
@@ -250,6 +252,10 @@ static int s2mps11_clk_remove(struct platform_device *pdev)
 	struct s2mps11_clk *s2mps11_clks = platform_get_drvdata(pdev);
 	int i;
 
+	of_clk_del_provider(s2mps11_clks[0].clk_np);
+	/* Drop the reference obtained in s2mps11_clk_parse_dt */
+	of_node_put(s2mps11_clks[0].clk_np);
+
 	for (i = 0; i < S2MPS11_CLKS_NUM; i++)
 		clkdev_drop(s2mps11_clks[i].lookup);
 
-- 
1.9.1

[PATCH v4 2/3] clk: s2mps11: Remove useless check for clk_table

[Krzysztof Kozlowski]

There is no need for checking if 'clk_table' is not NULL twice (first
after allocation and second at the end of probe()). Also move allocation
of this 'clk_table' to probe from s2mps11_clk_parse_dt as this is
logical place for it.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
---
 drivers/clk/clk-s2mps11.c | 24 +++++++++++-------------
 1 file changed, 11 insertions(+), 13 deletions(-)

diff --git a/drivers/clk/clk-s2mps11.c b/drivers/clk/clk-s2mps11.c
index 843ec3646501..23ffd89c4023 100644
--- a/drivers/clk/clk-s2mps11.c
+++ b/drivers/clk/clk-s2mps11.c
@@ -141,11 +141,6 @@ static struct device_node *s2mps11_clk_parse_dt(struct platform_device *pdev)
 		return ERR_PTR(-EINVAL);
 	}
 
-	clk_table = devm_kzalloc(&pdev->dev, sizeof(struct clk *) *
-				 S2MPS11_CLKS_NUM, GFP_KERNEL);
-	if (!clk_table)
-		return ERR_PTR(-ENOMEM);
-
 	for (i = 0; i < S2MPS11_CLKS_NUM; i++)
 		of_property_read_string_index(clk_np, "clock-output-names", i,
 				&s2mps11_clks_init[i].name);
@@ -168,6 +163,11 @@ static int s2mps11_clk_probe(struct platform_device *pdev)
 
 	s2mps11_clk = s2mps11_clks;
 
+	clk_table = devm_kzalloc(&pdev->dev, sizeof(struct clk *) *
+				 S2MPS11_CLKS_NUM, GFP_KERNEL);
+	if (!clk_table)
+		return -ENOMEM;
+
 	/* Store clocks of_node in first element of s2mps11_clks array */
 	s2mps11_clks->clk_np = s2mps11_clk_parse_dt(pdev);
 	if (IS_ERR(s2mps11_clks->clk_np))
@@ -220,15 +220,13 @@ static int s2mps11_clk_probe(struct platform_device *pdev)
 		clkdev_add(s2mps11_clk->lookup);
 	}
 
-	if (clk_table) {
-		for (i = 0; i < S2MPS11_CLKS_NUM; i++)
-			clk_table[i] = s2mps11_clks[i].clk;
+	for (i = 0; i < S2MPS11_CLKS_NUM; i++)
+		clk_table[i] = s2mps11_clks[i].clk;
 
-		clk_data.clks = clk_table;
-		clk_data.clk_num = S2MPS11_CLKS_NUM;
-		of_clk_add_provider(s2mps11_clks->clk_np,
-				of_clk_src_onecell_get, &clk_data);
-	}
+	clk_data.clks = clk_table;
+	clk_data.clk_num = S2MPS11_CLKS_NUM;
+	of_clk_add_provider(s2mps11_clks->clk_np, of_clk_src_onecell_get,
+			&clk_data);
 
 	platform_set_drvdata(pdev, s2mps11_clks);
 
-- 
1.9.1

[PATCH v4 3/3] clk: s2mps11: Add support for S2MPS14 clocks

[Krzysztof Kozlowski]

This patch adds support for S2MPS14 PMIC clocks (BT and AP) to the
s2mps11 clock driver.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
---
 drivers/clk/Kconfig       |  8 +++---
 drivers/clk/clk-s2mps11.c | 64 +++++++++++++++++++++++++++++++++++------------
 2 files changed, 52 insertions(+), 20 deletions(-)

diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 6f56d3a4f010..8f9ce8ba036d 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -65,12 +65,12 @@ config COMMON_CLK_SI570
 	  clock generators.
 
 config COMMON_CLK_S2MPS11
-	tristate "Clock driver for S2MPS11/S5M8767 MFD"
+	tristate "Clock driver for S2MPS1X/S5M8767 MFD"
 	depends on MFD_SEC_CORE
 	---help---
-	  This driver supports S2MPS11/S5M8767 crystal oscillator clock. These
-	  multi-function devices have 3 fixed-rate oscillators, clocked at
-	  32KHz each.
+	  This driver supports S2MPS11/S2MPS14/S5M8767 crystal oscillator
+	  clock. These multi-function devices have two (S2MPS14) or three
+	  (S2MPS11, S5M8767) fixed-rate oscillators, clocked at 32KHz each.
 
 config CLK_TWL6040
 	tristate "External McPDM functional clock from twl6040"
diff --git a/drivers/clk/clk-s2mps11.c b/drivers/clk/clk-s2mps11.c
index 23ffd89c4023..9b7b5859a420 100644
--- a/drivers/clk/clk-s2mps11.c
+++ b/drivers/clk/clk-s2mps11.c
@@ -1,7 +1,7 @@
 /*
  * clk-s2mps11.c - Clock driver for S2MPS11.
  *
- * Copyright (C) 2013 Samsung Electornics
+ * Copyright (C) 2013,2014 Samsung Electornics
  *
  * This program is free software; you can redistribute  it and/or modify it
  * under  the terms of  the GNU General  Public License as published by the
@@ -13,10 +13,6 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
  */
 
 #include <linux/module.h>
@@ -27,6 +23,7 @@
 #include <linux/clk-provider.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/samsung/s2mps11.h>
+#include <linux/mfd/samsung/s2mps14.h>
 #include <linux/mfd/samsung/s5m8767.h>
 #include <linux/mfd/samsung/core.h>
 
@@ -126,7 +123,21 @@ static struct clk_init_data s2mps11_clks_init[S2MPS11_CLKS_NUM] = {
 	},
 };
 
-static struct device_node *s2mps11_clk_parse_dt(struct platform_device *pdev)
+static struct clk_init_data s2mps14_clks_init[S2MPS11_CLKS_NUM] = {
+	[S2MPS11_CLK_AP] = {
+		.name = "s2mps14_ap",
+		.ops = &s2mps11_clk_ops,
+		.flags = CLK_IS_ROOT,
+	},
+	[S2MPS11_CLK_BT] = {
+		.name = "s2mps14_bt",
+		.ops = &s2mps11_clk_ops,
+		.flags = CLK_IS_ROOT,
+	},
+};
+
+static struct device_node *s2mps11_clk_parse_dt(struct platform_device *pdev,
+		struct clk_init_data *clks_init)
 {
 	struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 	struct device_node *clk_np;
@@ -141,9 +152,12 @@ static struct device_node *s2mps11_clk_parse_dt(struct platform_device *pdev)
 		return ERR_PTR(-EINVAL);
 	}
 
-	for (i = 0; i < S2MPS11_CLKS_NUM; i++)
+	for (i = 0; i < S2MPS11_CLKS_NUM; i++) {
+		if (!clks_init[i].name)
+			continue; /* Skip clocks not present in some devices */
 		of_property_read_string_index(clk_np, "clock-output-names", i,
-				&s2mps11_clks_init[i].name);
+				&clks_init[i].name);
+	}
 
 	return clk_np;
 }
@@ -153,6 +167,7 @@ static int s2mps11_clk_probe(struct platform_device *pdev)
 	struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 	struct s2mps11_clk *s2mps11_clks, *s2mps11_clk;
 	unsigned int s2mps11_reg;
+	struct clk_init_data *clks_init;
 	int i, ret = 0;
 	u32 val;
 
@@ -168,26 +183,34 @@ static int s2mps11_clk_probe(struct platform_device *pdev)
 	if (!clk_table)
 		return -ENOMEM;
 
-	/* Store clocks of_node in first element of s2mps11_clks array */
-	s2mps11_clks->clk_np = s2mps11_clk_parse_dt(pdev);
-	if (IS_ERR(s2mps11_clks->clk_np))
-		return PTR_ERR(s2mps11_clks->clk_np);
-
 	switch(platform_get_device_id(pdev)->driver_data) {
 	case S2MPS11X:
 		s2mps11_reg = S2MPS11_REG_RTC_CTRL;
+		clks_init = s2mps11_clks_init;
+		break;
+	case S2MPS14X:
+		s2mps11_reg = S2MPS14_REG_RTCCTRL;
+		clks_init = s2mps14_clks_init;
 		break;
 	case S5M8767X:
 		s2mps11_reg = S5M8767_REG_CTRL1;
+		clks_init = s2mps11_clks_init;
 		break;
 	default:
 		dev_err(&pdev->dev, "Invalid device type\n");
 		return -EINVAL;
 	};
 
+	/* Store clocks of_node in first element of s2mps11_clks array */
+	s2mps11_clks->clk_np = s2mps11_clk_parse_dt(pdev, clks_init);
+	if (IS_ERR(s2mps11_clks->clk_np))
+		return PTR_ERR(s2mps11_clks->clk_np);
+
 	for (i = 0; i < S2MPS11_CLKS_NUM; i++, s2mps11_clk++) {
+		if (!clks_init[i].name)
+			continue; /* Skip clocks not present in some devices */
 		s2mps11_clk->iodev = iodev;
-		s2mps11_clk->hw.init = &s2mps11_clks_init[i];
+		s2mps11_clk->hw.init = &clks_init[i];
 		s2mps11_clk->mask = 1 << i;
 		s2mps11_clk->reg = s2mps11_reg;
 
@@ -220,8 +243,12 @@ static int s2mps11_clk_probe(struct platform_device *pdev)
 		clkdev_add(s2mps11_clk->lookup);
 	}
 
-	for (i = 0; i < S2MPS11_CLKS_NUM; i++)
+	for (i = 0; i < S2MPS11_CLKS_NUM; i++) {
+		/* Skip clocks not present on S2MPS14 */
+		if (!clks_init[i].name)
+			continue;
 		clk_table[i] = s2mps11_clks[i].clk;
+	}
 
 	clk_data.clks = clk_table;
 	clk_data.clk_num = S2MPS11_CLKS_NUM;
@@ -254,14 +281,19 @@ static int s2mps11_clk_remove(struct platform_device *pdev)
 	/* Drop the reference obtained in s2mps11_clk_parse_dt */
 	of_node_put(s2mps11_clks[0].clk_np);
 
-	for (i = 0; i < S2MPS11_CLKS_NUM; i++)
+	for (i = 0; i < S2MPS11_CLKS_NUM; i++) {
+		/* Skip clocks not present on S2MPS14 */
+		if (!s2mps11_clks[i].lookup)
+			continue;
 		clkdev_drop(s2mps11_clks[i].lookup);
+	}
 
 	return 0;
 }
 
 static const struct platform_device_id s2mps11_clk_id[] = {
 	{ "s2mps11-clk", S2MPS11X},
+	{ "s2mps14-clk", S2MPS14X},
 	{ "s5m8767-clk", S5M8767X},
 	{ },
 };
-- 
1.9.1

Re: [PATCH v4 0/3] clk: s2mps11: Fixes and add support for S2MPS14 clocks

[Mike Turquette]

Quoting Krzysztof Kozlowski (2014-05-21 04:22:58)
> Hi,
> 
> 
> This is actually a resend of previous patches, rebased on latest
> 3.15-rc5. There are no changes, beside rebasing.
> 
> The first two fixes were posted previously as separate patches and they
> didn't get review [1]. I am attaching them here.
> The last patch adds support for S2MPS14 device and already was
> reviewed/acked [2].
> 
> Mike, could you pick them up or should they go through MFD tree?

Applied to clk-next.

Regards,
Mike

> 
> 
> [1] https://lkml.org/lkml/2014/4/7/42
> [2] http://thread.gmane.org/gmane.linux.kernel.samsung-soc/28039/focus=310279
> 
> 
> Changes since v3:
> =================
> 1. Add Mike's acked-by (see [2]).
> 2. Rebase patch 3/3 on the fixes (patches 1 and 2).
> 3. Rebase on v3.15-rc5-157-g60b5f90d0fac
> 
> Changes since v2:
> =================
> 1. Patch 2/3: Remove MFD cells of_compatible which aren't used by child
>    drivers and are not documented.
> 2. Added Tomasz's Review-by.
> 
> Changes since v1:
> =================
> 1. Patch 1/3: Update driver description in Kconfig.
> 2. Patch 2/3: Add of_compatible to all MFD cells.
> 3. Add Yadwinder's Review-by.
> 
> 
> Best regards,
> Krzysztof
> 
> 
> Krzysztof Kozlowski (3):
>   clk: s2mps11: Add missing of_node_put and of_clk_del_provider
>   clk: s2mps11: Remove useless check for clk_table
>   clk: s2mps11: Add support for S2MPS14 clocks
> 
>  drivers/clk/Kconfig       |  8 ++---
>  drivers/clk/clk-s2mps11.c | 88 +++++++++++++++++++++++++++++++++--------------
>  2 files changed, 66 insertions(+), 30 deletions(-)
> 
> -- 
> 1.9.1
>