[1/2] clk: ux500: Initial support for abx500 clock driver

Commit Message

Ulf Hansson Nov. 22, 2012, 10:35 a.m. UTC

From: Ulf Hansson <[e-mail]>

The abx500 clock driver is a platform driver which will be initialized
during arch init. The platform device shall be added from the ab-core
driver as a mfd child device to maintain correct boot sequence.

Depending on what ab version we use, different clock definitions will
be added.

Signed-off-by: Ulf Hansson <[e-mail]>
---
 drivers/clk/ux500/Makefile     |    3 ++
 drivers/clk/ux500/abx500-clk.c |   73 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 76 insertions(+)
 create mode 100644 drivers/clk/ux500/abx500-clk.c

Comments

Mike Turquette Nov. 26, 2012, 5:06 p.m. UTC | #1

Quoting Ulf Hansson (2012-11-22 02:35:39)
> From: Ulf Hansson <[e-mail]>
> 
> The abx500 clock driver is a platform driver which will be initialized
> during arch init. The platform device shall be added from the ab-core
> driver as a mfd child device to maintain correct boot sequence.
> 
> Depending on what ab version we use, different clock definitions will
> be added.
> 
> Signed-off-by: Ulf Hansson <[e-mail]>

Taken into clk-next.

Thanks,
Mike

> ---
>  drivers/clk/ux500/Makefile     |    3 ++
>  drivers/clk/ux500/abx500-clk.c |   73 ++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 76 insertions(+)
>  create mode 100644 drivers/clk/ux500/abx500-clk.c
> 
> diff --git a/drivers/clk/ux500/Makefile b/drivers/clk/ux500/Makefile
> index 858fbfe..bcc0c11 100644
> --- a/drivers/clk/ux500/Makefile
> +++ b/drivers/clk/ux500/Makefile
> @@ -10,3 +10,6 @@ obj-y += clk-prcmu.o
>  obj-y += u8500_clk.o
>  obj-y += u9540_clk.o
>  obj-y += u8540_clk.o
> +
> +# ABX500 clock driver
> +obj-y += abx500-clk.o
> diff --git a/drivers/clk/ux500/abx500-clk.c b/drivers/clk/ux500/abx500-clk.c
> new file mode 100644
> index 0000000..e27c523
> --- /dev/null
> +++ b/drivers/clk/ux500/abx500-clk.c
> @@ -0,0 +1,73 @@
> +/*
> + * abx500 clock implementation for ux500 platform.
> + *
> + * Copyright (C) 2012 ST-Ericsson SA
> + * Author: Ulf Hansson <[e-mail]>
> + *
> + * License terms: GNU General Public License (GPL) version 2
> + */
> +
> +#include <linux/err.h>
> +#include <linux/module.h>
> +#include <linux/device.h>
> +#include <linux/platform_device.h>
> +#include <linux/mfd/abx500/ab8500.h>
> +
> +/* TODO: Add clock implementations here */
> +
> +
> +/* Clock definitions for ab8500 */
> +static int ab8500_reg_clks(struct device *dev)
> +{
> +       return 0;
> +}
> +
> +/* Clock definitions for ab8540 */
> +static int ab8540_reg_clks(struct device *dev)
> +{
> +       return 0;
> +}
> +
> +/* Clock definitions for ab9540 */
> +static int ab9540_reg_clks(struct device *dev)
> +{
> +       return 0;
> +}
> +
> +static int __devinit abx500_clk_probe(struct platform_device *pdev)
> +{
> +       struct ab8500 *parent = dev_get_drvdata(pdev->dev.parent);
> +       int ret;
> +
> +       if (is_ab8500(parent) || is_ab8505(parent)) {
> +               ret = ab8500_reg_clks(&pdev->dev);
> +       } else if (is_ab8540(parent)) {
> +               ret = ab8540_reg_clks(&pdev->dev);
> +       } else if (is_ab9540(parent)) {
> +               ret = ab9540_reg_clks(&pdev->dev);
> +       } else {
> +               dev_err(&pdev->dev, "non supported plf id\n");
> +               return -ENODEV;
> +       }
> +
> +       return ret;
> +}
> +
> +static struct platform_driver abx500_clk_driver = {
> +       .driver = {
> +               .name = "abx500-clk",
> +               .owner = THIS_MODULE,
> +       },
> +       .probe  = abx500_clk_probe,
> +};
> +
> +static int __init abx500_clk_init(void)
> +{
> +       return platform_driver_register(&abx500_clk_driver);
> +}
> +
> +arch_initcall(abx500_clk_init);
> +
> +MODULE_AUTHOR("Ulf Hansson <[e-mail]");
> +MODULE_DESCRIPTION("ABX500 clk driver");
> +MODULE_LICENSE("GPL v2");
> -- 
> 1.7.10

Patch

diff --git a/drivers/clk/ux500/Makefile b/drivers/clk/ux500/Makefile
index 858fbfe..bcc0c11 100644
--- a/drivers/clk/ux500/Makefile
+++ b/drivers/clk/ux500/Makefile
@@ -10,3 +10,6 @@  obj-y += clk-prcmu.o
 obj-y += u8500_clk.o
 obj-y += u9540_clk.o
 obj-y += u8540_clk.o
+
+# ABX500 clock driver
+obj-y += abx500-clk.o
diff --git a/drivers/clk/ux500/abx500-clk.c b/drivers/clk/ux500/abx500-clk.c
new file mode 100644
index 0000000..e27c523
--- /dev/null
+++ b/drivers/clk/ux500/abx500-clk.c
@@ -0,0 +1,73 @@ 
+/*
+ * abx500 clock implementation for ux500 platform.
+ *
+ * Copyright (C) 2012 ST-Ericsson SA
+ * Author: Ulf Hansson <[e-mail]>
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/abx500/ab8500.h>
+
+/* TODO: Add clock implementations here */
+
+
+/* Clock definitions for ab8500 */
+static int ab8500_reg_clks(struct device *dev)
+{
+	return 0;
+}
+
+/* Clock definitions for ab8540 */
+static int ab8540_reg_clks(struct device *dev)
+{
+	return 0;
+}
+
+/* Clock definitions for ab9540 */
+static int ab9540_reg_clks(struct device *dev)
+{
+	return 0;
+}
+
+static int __devinit abx500_clk_probe(struct platform_device *pdev)
+{
+	struct ab8500 *parent = dev_get_drvdata(pdev->dev.parent);
+	int ret;
+
+	if (is_ab8500(parent) || is_ab8505(parent)) {
+		ret = ab8500_reg_clks(&pdev->dev);
+	} else if (is_ab8540(parent)) {
+		ret = ab8540_reg_clks(&pdev->dev);
+	} else if (is_ab9540(parent)) {
+		ret = ab9540_reg_clks(&pdev->dev);
+	} else {
+		dev_err(&pdev->dev, "non supported plf id\n");
+		return -ENODEV;
+	}
+
+	return ret;
+}
+
+static struct platform_driver abx500_clk_driver = {
+	.driver = {
+		.name = "abx500-clk",
+		.owner = THIS_MODULE,
+	},
+	.probe	= abx500_clk_probe,
+};
+
+static int __init abx500_clk_init(void)
+{
+	return platform_driver_register(&abx500_clk_driver);
+}
+
+arch_initcall(abx500_clk_init);
+
+MODULE_AUTHOR("Ulf Hansson <[e-mail]");
+MODULE_DESCRIPTION("ABX500 clk driver");
+MODULE_LICENSE("GPL v2");