* [PATCH v2 0/2] Add device tree probe for i2c-imx driver
@ 2011-07-30 18:21 ` Shawn Guo
0 siblings, 0 replies; 10+ messages in thread
From: Shawn Guo @ 2011-07-30 18:21 UTC (permalink / raw)
To: linux-i2c-u79uwXL29TY76Z2rM5mHXA
Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
patches-QSEj5FYQhm4dnm+yROfE0A
The first patch removes unused init/exit hooks from platform data,
and the second one actually adds the actual device tree probe support.
Changes since v1:
* Fix a couple of typo in fsl-imx-i2c.txt
Shawn Guo (2):
i2c/imx: remove init/exit hooks from platform data
i2c/imx: add device tree probe support
.../devicetree/bindings/i2c/fsl-imx-i2c.txt | 25 +++++++++++
arch/arm/plat-mxc/include/mach/i2c.h | 4 --
drivers/i2c/busses/i2c-imx.c | 46 +++++++++----------
3 files changed, 47 insertions(+), 28 deletions(-)
^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH v2 0/2] Add device tree probe for i2c-imx driver
@ 2011-07-30 18:21 ` Shawn Guo
0 siblings, 0 replies; 10+ messages in thread
From: Shawn Guo @ 2011-07-30 18:21 UTC (permalink / raw)
To: linux-arm-kernel
The first patch removes unused init/exit hooks from platform data,
and the second one actually adds the actual device tree probe support.
Changes since v1:
* Fix a couple of typo in fsl-imx-i2c.txt
Shawn Guo (2):
i2c/imx: remove init/exit hooks from platform data
i2c/imx: add device tree probe support
.../devicetree/bindings/i2c/fsl-imx-i2c.txt | 25 +++++++++++
arch/arm/plat-mxc/include/mach/i2c.h | 4 --
drivers/i2c/busses/i2c-imx.c | 46 +++++++++----------
3 files changed, 47 insertions(+), 28 deletions(-)
^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH v2 1/2] i2c/imx: remove init/exit hooks from platform data
2011-07-30 18:21 ` Shawn Guo
@ 2011-07-30 18:21 ` Shawn Guo
-1 siblings, 0 replies; 10+ messages in thread
From: Shawn Guo @ 2011-07-30 18:21 UTC (permalink / raw)
To: linux-i2c-u79uwXL29TY76Z2rM5mHXA
Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
patches-QSEj5FYQhm4dnm+yROfE0A, Shawn Guo, Darius Augulis,
Ben Dooks
The init/exit hooks in platform data are being used nowhere, so can
be removed.
Signed-off-by: Shawn Guo <shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: Darius Augulis <augulis.darius-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>
Acked-by: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
Acked-by: Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
---
arch/arm/plat-mxc/include/mach/i2c.h | 4 ----
drivers/i2c/busses/i2c-imx.c | 21 +++------------------
2 files changed, 3 insertions(+), 22 deletions(-)
diff --git a/arch/arm/plat-mxc/include/mach/i2c.h b/arch/arm/plat-mxc/include/mach/i2c.h
index 4a5dc5c..375cdd0 100644
--- a/arch/arm/plat-mxc/include/mach/i2c.h
+++ b/arch/arm/plat-mxc/include/mach/i2c.h
@@ -11,14 +11,10 @@
/**
* struct imxi2c_platform_data - structure of platform data for MXC I2C driver
- * @init: Initialise gpio's and other board specific things
- * @exit: Free everything initialised by @init
* @bitrate: Bus speed measured in Hz
*
**/
struct imxi2c_platform_data {
- int (*init)(struct device *dev);
- void (*exit)(struct device *dev);
int bitrate;
};
diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
index 4c2a62b..54d809e 100644
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -466,7 +466,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
{
struct imx_i2c_struct *i2c_imx;
struct resource *res;
- struct imxi2c_platform_data *pdata;
+ struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
void __iomem *base;
resource_size_t res_size;
int irq;
@@ -485,19 +485,11 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
return -ENOENT;
}
- pdata = pdev->dev.platform_data;
-
- if (pdata && pdata->init) {
- ret = pdata->init(&pdev->dev);
- if (ret)
- return ret;
- }
-
res_size = resource_size(res);
if (!request_mem_region(res->start, res_size, DRIVER_NAME)) {
- ret = -EBUSY;
- goto fail0;
+ dev_err(&pdev->dev, "request_mem_region failed\n");
+ return -EBUSY;
}
base = ioremap(res->start, res_size);
@@ -586,9 +578,6 @@ fail2:
iounmap(base);
fail1:
release_mem_region(res->start, resource_size(res));
-fail0:
- if (pdata && pdata->exit)
- pdata->exit(&pdev->dev);
return ret; /* Return error number */
}
@@ -611,10 +600,6 @@ static int __exit i2c_imx_remove(struct platform_device *pdev)
writeb(0, i2c_imx->base + IMX_I2C_I2CR);
writeb(0, i2c_imx->base + IMX_I2C_I2SR);
- /* Shut down hardware */
- if (pdata && pdata->exit)
- pdata->exit(&pdev->dev);
-
clk_put(i2c_imx->clk);
iounmap(i2c_imx->base);
--
1.7.4.1
^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v2 1/2] i2c/imx: remove init/exit hooks from platform data
@ 2011-07-30 18:21 ` Shawn Guo
0 siblings, 0 replies; 10+ messages in thread
From: Shawn Guo @ 2011-07-30 18:21 UTC (permalink / raw)
To: linux-arm-kernel
The init/exit hooks in platform data are being used nowhere, so can
be removed.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Darius Augulis <augulis.darius@gmail.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
---
arch/arm/plat-mxc/include/mach/i2c.h | 4 ----
drivers/i2c/busses/i2c-imx.c | 21 +++------------------
2 files changed, 3 insertions(+), 22 deletions(-)
diff --git a/arch/arm/plat-mxc/include/mach/i2c.h b/arch/arm/plat-mxc/include/mach/i2c.h
index 4a5dc5c..375cdd0 100644
--- a/arch/arm/plat-mxc/include/mach/i2c.h
+++ b/arch/arm/plat-mxc/include/mach/i2c.h
@@ -11,14 +11,10 @@
/**
* struct imxi2c_platform_data - structure of platform data for MXC I2C driver
- * @init: Initialise gpio's and other board specific things
- * @exit: Free everything initialised by @init
* @bitrate: Bus speed measured in Hz
*
**/
struct imxi2c_platform_data {
- int (*init)(struct device *dev);
- void (*exit)(struct device *dev);
int bitrate;
};
diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
index 4c2a62b..54d809e 100644
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -466,7 +466,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
{
struct imx_i2c_struct *i2c_imx;
struct resource *res;
- struct imxi2c_platform_data *pdata;
+ struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
void __iomem *base;
resource_size_t res_size;
int irq;
@@ -485,19 +485,11 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
return -ENOENT;
}
- pdata = pdev->dev.platform_data;
-
- if (pdata && pdata->init) {
- ret = pdata->init(&pdev->dev);
- if (ret)
- return ret;
- }
-
res_size = resource_size(res);
if (!request_mem_region(res->start, res_size, DRIVER_NAME)) {
- ret = -EBUSY;
- goto fail0;
+ dev_err(&pdev->dev, "request_mem_region failed\n");
+ return -EBUSY;
}
base = ioremap(res->start, res_size);
@@ -586,9 +578,6 @@ fail2:
iounmap(base);
fail1:
release_mem_region(res->start, resource_size(res));
-fail0:
- if (pdata && pdata->exit)
- pdata->exit(&pdev->dev);
return ret; /* Return error number */
}
@@ -611,10 +600,6 @@ static int __exit i2c_imx_remove(struct platform_device *pdev)
writeb(0, i2c_imx->base + IMX_I2C_I2CR);
writeb(0, i2c_imx->base + IMX_I2C_I2SR);
- /* Shut down hardware */
- if (pdata && pdata->exit)
- pdata->exit(&pdev->dev);
-
clk_put(i2c_imx->clk);
iounmap(i2c_imx->base);
--
1.7.4.1
^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v2 2/2] i2c/imx: add device tree probe support
2011-07-30 18:21 ` Shawn Guo
@ 2011-07-30 18:21 ` Shawn Guo
-1 siblings, 0 replies; 10+ messages in thread
From: Shawn Guo @ 2011-07-30 18:21 UTC (permalink / raw)
To: linux-i2c-u79uwXL29TY76Z2rM5mHXA
Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
patches-QSEj5FYQhm4dnm+yROfE0A, Shawn Guo, Grant Likely,
Darius Augulis, Ben Dooks
It adds device tree probe support for i2c-imx driver.
Signed-off-by: Shawn Guo <shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
Cc: Darius Augulis <augulis.darius-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>
Acked-by: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
---
.../devicetree/bindings/i2c/fsl-imx-i2c.txt | 25 ++++++++++++++++++++
drivers/i2c/busses/i2c-imx.c | 25 +++++++++++++++----
2 files changed, 44 insertions(+), 6 deletions(-)
create mode 100644 Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
diff --git a/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
new file mode 100644
index 0000000..f3cf43b
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
@@ -0,0 +1,25 @@
+* Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX
+
+Required properties:
+- compatible : Should be "fsl,<chip>-i2c"
+- reg : Should contain I2C/HS-I2C registers location and length
+- interrupts : Should contain I2C/HS-I2C interrupt
+
+Optional properties:
+- clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz.
+ The absence of the propoerty indicates the default frequency 100 kHz.
+
+Examples:
+
+i2c@83fc4000 { /* I2C2 on i.MX51 */
+ compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
+ reg = <0x83fc4000 0x4000>;
+ interrupts = <63>;
+};
+
+i2c@70038000 { /* HS-I2C on i.MX51 */
+ compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
+ reg = <0x70038000 0x4000>;
+ interrupts = <64>;
+ clock-frequency = <400000>;
+};
diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
index 54d809e..58832e5 100644
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -48,6 +48,9 @@
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_i2c.h>
#include <mach/irqs.h>
#include <mach/hardware.h>
@@ -125,6 +128,11 @@ struct imx_i2c_struct {
unsigned int ifdr; /* IMX_I2C_IFDR */
};
+static const struct of_device_id i2c_imx_dt_ids[] = {
+ { .compatible = "fsl,imx1-i2c", },
+ { /* sentinel */ }
+};
+
/** Functions for IMX I2C adapter driver ***************************************
*******************************************************************************/
@@ -469,7 +477,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
void __iomem *base;
resource_size_t res_size;
- int irq;
+ int irq, bitrate;
int ret;
dev_dbg(&pdev->dev, "<%s>\n", __func__);
@@ -512,6 +520,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
i2c_imx->adapter.algo = &i2c_imx_algo;
i2c_imx->adapter.dev.parent = &pdev->dev;
i2c_imx->adapter.nr = pdev->id;
+ i2c_imx->adapter.dev.of_node = pdev->dev.of_node;
i2c_imx->irq = irq;
i2c_imx->base = base;
i2c_imx->res = res;
@@ -538,10 +547,12 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
i2c_set_adapdata(&i2c_imx->adapter, i2c_imx);
/* Set up clock divider */
- if (pdata && pdata->bitrate)
- i2c_imx_set_clk(i2c_imx, pdata->bitrate);
- else
- i2c_imx_set_clk(i2c_imx, IMX_I2C_BIT_RATE);
+ bitrate = IMX_I2C_BIT_RATE;
+ ret = of_property_read_u32(pdev->dev.of_node,
+ "clock-frequency", &bitrate);
+ if (ret < 0 && pdata && pdata->bitrate)
+ bitrate = pdata->bitrate;
+ i2c_imx_set_clk(i2c_imx, bitrate);
/* Set up chip registers to defaults */
writeb(0, i2c_imx->base + IMX_I2C_I2CR);
@@ -554,6 +565,8 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
goto fail5;
}
+ of_i2c_register_devices(&i2c_imx->adapter);
+
/* Set up platform driver data */
platform_set_drvdata(pdev, i2c_imx);
@@ -584,7 +597,6 @@ fail1:
static int __exit i2c_imx_remove(struct platform_device *pdev)
{
struct imx_i2c_struct *i2c_imx = platform_get_drvdata(pdev);
- struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
/* remove adapter */
dev_dbg(&i2c_imx->adapter.dev, "adapter removed\n");
@@ -613,6 +625,7 @@ static struct platform_driver i2c_imx_driver = {
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
+ .of_match_table = i2c_imx_dt_ids,
}
};
--
1.7.4.1
^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v2 2/2] i2c/imx: add device tree probe support
@ 2011-07-30 18:21 ` Shawn Guo
0 siblings, 0 replies; 10+ messages in thread
From: Shawn Guo @ 2011-07-30 18:21 UTC (permalink / raw)
To: linux-arm-kernel
It adds device tree probe support for i2c-imx driver.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Darius Augulis <augulis.darius@gmail.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
---
.../devicetree/bindings/i2c/fsl-imx-i2c.txt | 25 ++++++++++++++++++++
drivers/i2c/busses/i2c-imx.c | 25 +++++++++++++++----
2 files changed, 44 insertions(+), 6 deletions(-)
create mode 100644 Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
diff --git a/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
new file mode 100644
index 0000000..f3cf43b
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
@@ -0,0 +1,25 @@
+* Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX
+
+Required properties:
+- compatible : Should be "fsl,<chip>-i2c"
+- reg : Should contain I2C/HS-I2C registers location and length
+- interrupts : Should contain I2C/HS-I2C interrupt
+
+Optional properties:
+- clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz.
+ The absence of the propoerty indicates the default frequency 100 kHz.
+
+Examples:
+
+i2c at 83fc4000 { /* I2C2 on i.MX51 */
+ compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
+ reg = <0x83fc4000 0x4000>;
+ interrupts = <63>;
+};
+
+i2c at 70038000 { /* HS-I2C on i.MX51 */
+ compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
+ reg = <0x70038000 0x4000>;
+ interrupts = <64>;
+ clock-frequency = <400000>;
+};
diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
index 54d809e..58832e5 100644
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -48,6 +48,9 @@
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_i2c.h>
#include <mach/irqs.h>
#include <mach/hardware.h>
@@ -125,6 +128,11 @@ struct imx_i2c_struct {
unsigned int ifdr; /* IMX_I2C_IFDR */
};
+static const struct of_device_id i2c_imx_dt_ids[] = {
+ { .compatible = "fsl,imx1-i2c", },
+ { /* sentinel */ }
+};
+
/** Functions for IMX I2C adapter driver ***************************************
*******************************************************************************/
@@ -469,7 +477,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
void __iomem *base;
resource_size_t res_size;
- int irq;
+ int irq, bitrate;
int ret;
dev_dbg(&pdev->dev, "<%s>\n", __func__);
@@ -512,6 +520,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
i2c_imx->adapter.algo = &i2c_imx_algo;
i2c_imx->adapter.dev.parent = &pdev->dev;
i2c_imx->adapter.nr = pdev->id;
+ i2c_imx->adapter.dev.of_node = pdev->dev.of_node;
i2c_imx->irq = irq;
i2c_imx->base = base;
i2c_imx->res = res;
@@ -538,10 +547,12 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
i2c_set_adapdata(&i2c_imx->adapter, i2c_imx);
/* Set up clock divider */
- if (pdata && pdata->bitrate)
- i2c_imx_set_clk(i2c_imx, pdata->bitrate);
- else
- i2c_imx_set_clk(i2c_imx, IMX_I2C_BIT_RATE);
+ bitrate = IMX_I2C_BIT_RATE;
+ ret = of_property_read_u32(pdev->dev.of_node,
+ "clock-frequency", &bitrate);
+ if (ret < 0 && pdata && pdata->bitrate)
+ bitrate = pdata->bitrate;
+ i2c_imx_set_clk(i2c_imx, bitrate);
/* Set up chip registers to defaults */
writeb(0, i2c_imx->base + IMX_I2C_I2CR);
@@ -554,6 +565,8 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
goto fail5;
}
+ of_i2c_register_devices(&i2c_imx->adapter);
+
/* Set up platform driver data */
platform_set_drvdata(pdev, i2c_imx);
@@ -584,7 +597,6 @@ fail1:
static int __exit i2c_imx_remove(struct platform_device *pdev)
{
struct imx_i2c_struct *i2c_imx = platform_get_drvdata(pdev);
- struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
/* remove adapter */
dev_dbg(&i2c_imx->adapter.dev, "adapter removed\n");
@@ -613,6 +625,7 @@ static struct platform_driver i2c_imx_driver = {
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
+ .of_match_table = i2c_imx_dt_ids,
}
};
--
1.7.4.1
^ permalink raw reply related [flat|nested] 10+ messages in thread
* Re: [PATCH v2 2/2] i2c/imx: add device tree probe support
2011-07-30 18:21 ` Shawn Guo
@ 2011-08-01 21:25 ` Ben Dooks
-1 siblings, 0 replies; 10+ messages in thread
From: Ben Dooks @ 2011-08-01 21:25 UTC (permalink / raw)
To: Shawn Guo, t
Cc: linux-i2c-u79uwXL29TY76Z2rM5mHXA,
devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
patches-QSEj5FYQhm4dnm+yROfE0A, Grant Likely, Darius Augulis,
Ben Dooks
On Sun, Jul 31, 2011 at 02:21:27AM +0800, Shawn Guo wrote:
> It adds device tree probe support for i2c-imx driver.
>
> Signed-off-by: Shawn Guo <shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> Cc: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
> Cc: Darius Augulis <augulis.darius-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Cc: Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>
> Acked-by: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
> ---
> .../devicetree/bindings/i2c/fsl-imx-i2c.txt | 25 ++++++++++++++++++++
> drivers/i2c/busses/i2c-imx.c | 25 +++++++++++++++----
> 2 files changed, 44 insertions(+), 6 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
>
> diff --git a/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
> new file mode 100644
> index 0000000..f3cf43b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
> @@ -0,0 +1,25 @@
> +* Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX
> +
> +Required properties:
> +- compatible : Should be "fsl,<chip>-i2c"
> +- reg : Should contain I2C/HS-I2C registers location and length
> +- interrupts : Should contain I2C/HS-I2C interrupt
> +
> +Optional properties:
> +- clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz.
> + The absence of the propoerty indicates the default frequency 100 kHz.
> +
> +Examples:
> +
> +i2c@83fc4000 { /* I2C2 on i.MX51 */
> + compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
> + reg = <0x83fc4000 0x4000>;
> + interrupts = <63>;
> +};
> +
> +i2c@70038000 { /* HS-I2C on i.MX51 */
> + compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
> + reg = <0x70038000 0x4000>;
> + interrupts = <64>;
> + clock-frequency = <400000>;
> +};
It occurs to me that the clock-frequency field should be a standard
used by all of-i2c drivers? could we have a standardised set of
properties and a standard chunk of code that reads them?
> diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
> index 54d809e..58832e5 100644
> --- a/drivers/i2c/busses/i2c-imx.c
> +++ b/drivers/i2c/busses/i2c-imx.c
> @@ -48,6 +48,9 @@
> #include <linux/platform_device.h>
> #include <linux/clk.h>
> #include <linux/slab.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/of_i2c.h>
>
> #include <mach/irqs.h>
> #include <mach/hardware.h>
> @@ -125,6 +128,11 @@ struct imx_i2c_struct {
> unsigned int ifdr; /* IMX_I2C_IFDR */
> };
>
> +static const struct of_device_id i2c_imx_dt_ids[] = {
> + { .compatible = "fsl,imx1-i2c", },
> + { /* sentinel */ }
> +};
> +
> /** Functions for IMX I2C adapter driver ***************************************
> *******************************************************************************/
>
> @@ -469,7 +477,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
> struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
> void __iomem *base;
> resource_size_t res_size;
> - int irq;
> + int irq, bitrate;
> int ret;
>
> dev_dbg(&pdev->dev, "<%s>\n", __func__);
> @@ -512,6 +520,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
> i2c_imx->adapter.algo = &i2c_imx_algo;
> i2c_imx->adapter.dev.parent = &pdev->dev;
> i2c_imx->adapter.nr = pdev->id;
> + i2c_imx->adapter.dev.of_node = pdev->dev.of_node;
> i2c_imx->irq = irq;
> i2c_imx->base = base;
> i2c_imx->res = res;
> @@ -538,10 +547,12 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
> i2c_set_adapdata(&i2c_imx->adapter, i2c_imx);
>
> /* Set up clock divider */
> - if (pdata && pdata->bitrate)
> - i2c_imx_set_clk(i2c_imx, pdata->bitrate);
> - else
> - i2c_imx_set_clk(i2c_imx, IMX_I2C_BIT_RATE);
> + bitrate = IMX_I2C_BIT_RATE;
> + ret = of_property_read_u32(pdev->dev.of_node,
> + "clock-frequency", &bitrate);
> + if (ret < 0 && pdata && pdata->bitrate)
> + bitrate = pdata->bitrate;
> + i2c_imx_set_clk(i2c_imx, bitrate);
>
> /* Set up chip registers to defaults */
> writeb(0, i2c_imx->base + IMX_I2C_I2CR);
> @@ -554,6 +565,8 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
> goto fail5;
> }
>
> + of_i2c_register_devices(&i2c_imx->adapter);
> +
> /* Set up platform driver data */
> platform_set_drvdata(pdev, i2c_imx);
>
> @@ -584,7 +597,6 @@ fail1:
> static int __exit i2c_imx_remove(struct platform_device *pdev)
> {
> struct imx_i2c_struct *i2c_imx = platform_get_drvdata(pdev);
> - struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
>
> /* remove adapter */
> dev_dbg(&i2c_imx->adapter.dev, "adapter removed\n");
> @@ -613,6 +625,7 @@ static struct platform_driver i2c_imx_driver = {
> .driver = {
> .name = DRIVER_NAME,
> .owner = THIS_MODULE,
> + .of_match_table = i2c_imx_dt_ids,
> }
> };
>
> --
> 1.7.4.1
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-i2c" in
> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH v2 2/2] i2c/imx: add device tree probe support
@ 2011-08-01 21:25 ` Ben Dooks
0 siblings, 0 replies; 10+ messages in thread
From: Ben Dooks @ 2011-08-01 21:25 UTC (permalink / raw)
To: linux-arm-kernel
On Sun, Jul 31, 2011 at 02:21:27AM +0800, Shawn Guo wrote:
> It adds device tree probe support for i2c-imx driver.
>
> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
> Cc: Grant Likely <grant.likely@secretlab.ca>
> Cc: Darius Augulis <augulis.darius@gmail.com>
> Cc: Ben Dooks <ben-linux@fluff.org>
> Acked-by: Grant Likely <grant.likely@secretlab.ca>
> ---
> .../devicetree/bindings/i2c/fsl-imx-i2c.txt | 25 ++++++++++++++++++++
> drivers/i2c/busses/i2c-imx.c | 25 +++++++++++++++----
> 2 files changed, 44 insertions(+), 6 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
>
> diff --git a/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
> new file mode 100644
> index 0000000..f3cf43b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
> @@ -0,0 +1,25 @@
> +* Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX
> +
> +Required properties:
> +- compatible : Should be "fsl,<chip>-i2c"
> +- reg : Should contain I2C/HS-I2C registers location and length
> +- interrupts : Should contain I2C/HS-I2C interrupt
> +
> +Optional properties:
> +- clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz.
> + The absence of the propoerty indicates the default frequency 100 kHz.
> +
> +Examples:
> +
> +i2c at 83fc4000 { /* I2C2 on i.MX51 */
> + compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
> + reg = <0x83fc4000 0x4000>;
> + interrupts = <63>;
> +};
> +
> +i2c at 70038000 { /* HS-I2C on i.MX51 */
> + compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
> + reg = <0x70038000 0x4000>;
> + interrupts = <64>;
> + clock-frequency = <400000>;
> +};
It occurs to me that the clock-frequency field should be a standard
used by all of-i2c drivers? could we have a standardised set of
properties and a standard chunk of code that reads them?
> diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
> index 54d809e..58832e5 100644
> --- a/drivers/i2c/busses/i2c-imx.c
> +++ b/drivers/i2c/busses/i2c-imx.c
> @@ -48,6 +48,9 @@
> #include <linux/platform_device.h>
> #include <linux/clk.h>
> #include <linux/slab.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/of_i2c.h>
>
> #include <mach/irqs.h>
> #include <mach/hardware.h>
> @@ -125,6 +128,11 @@ struct imx_i2c_struct {
> unsigned int ifdr; /* IMX_I2C_IFDR */
> };
>
> +static const struct of_device_id i2c_imx_dt_ids[] = {
> + { .compatible = "fsl,imx1-i2c", },
> + { /* sentinel */ }
> +};
> +
> /** Functions for IMX I2C adapter driver ***************************************
> *******************************************************************************/
>
> @@ -469,7 +477,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
> struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
> void __iomem *base;
> resource_size_t res_size;
> - int irq;
> + int irq, bitrate;
> int ret;
>
> dev_dbg(&pdev->dev, "<%s>\n", __func__);
> @@ -512,6 +520,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
> i2c_imx->adapter.algo = &i2c_imx_algo;
> i2c_imx->adapter.dev.parent = &pdev->dev;
> i2c_imx->adapter.nr = pdev->id;
> + i2c_imx->adapter.dev.of_node = pdev->dev.of_node;
> i2c_imx->irq = irq;
> i2c_imx->base = base;
> i2c_imx->res = res;
> @@ -538,10 +547,12 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
> i2c_set_adapdata(&i2c_imx->adapter, i2c_imx);
>
> /* Set up clock divider */
> - if (pdata && pdata->bitrate)
> - i2c_imx_set_clk(i2c_imx, pdata->bitrate);
> - else
> - i2c_imx_set_clk(i2c_imx, IMX_I2C_BIT_RATE);
> + bitrate = IMX_I2C_BIT_RATE;
> + ret = of_property_read_u32(pdev->dev.of_node,
> + "clock-frequency", &bitrate);
> + if (ret < 0 && pdata && pdata->bitrate)
> + bitrate = pdata->bitrate;
> + i2c_imx_set_clk(i2c_imx, bitrate);
>
> /* Set up chip registers to defaults */
> writeb(0, i2c_imx->base + IMX_I2C_I2CR);
> @@ -554,6 +565,8 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
> goto fail5;
> }
>
> + of_i2c_register_devices(&i2c_imx->adapter);
> +
> /* Set up platform driver data */
> platform_set_drvdata(pdev, i2c_imx);
>
> @@ -584,7 +597,6 @@ fail1:
> static int __exit i2c_imx_remove(struct platform_device *pdev)
> {
> struct imx_i2c_struct *i2c_imx = platform_get_drvdata(pdev);
> - struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
>
> /* remove adapter */
> dev_dbg(&i2c_imx->adapter.dev, "adapter removed\n");
> @@ -613,6 +625,7 @@ static struct platform_driver i2c_imx_driver = {
> .driver = {
> .name = DRIVER_NAME,
> .owner = THIS_MODULE,
> + .of_match_table = i2c_imx_dt_ids,
> }
> };
>
> --
> 1.7.4.1
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-i2c" in
> the body of a message to majordomo at vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH v2 2/2] i2c/imx: add device tree probe support
2011-08-01 21:25 ` Ben Dooks
@ 2011-08-02 8:35 ` Shawn Guo
-1 siblings, 0 replies; 10+ messages in thread
From: Shawn Guo @ 2011-08-02 8:35 UTC (permalink / raw)
To: Ben Dooks
Cc: t, linux-i2c-u79uwXL29TY76Z2rM5mHXA,
devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
patches-QSEj5FYQhm4dnm+yROfE0A, Grant Likely, Darius Augulis,
Ben Dooks
On 1 August 2011 22:25, Ben Dooks <ben-i2c-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org> wrote:
> On Sun, Jul 31, 2011 at 02:21:27AM +0800, Shawn Guo wrote:
>> It adds device tree probe support for i2c-imx driver.
>>
>> Signed-off-by: Shawn Guo <shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
>> Cc: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
>> Cc: Darius Augulis <augulis.darius-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>> Cc: Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>
>> Acked-by: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
>> ---
>> .../devicetree/bindings/i2c/fsl-imx-i2c.txt | 25 ++++++++++++++++++++
>> drivers/i2c/busses/i2c-imx.c | 25 +++++++++++++++----
>> 2 files changed, 44 insertions(+), 6 deletions(-)
>> create mode 100644 Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
>>
>> diff --git a/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
>> new file mode 100644
>> index 0000000..f3cf43b
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
>> @@ -0,0 +1,25 @@
>> +* Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX
>> +
>> +Required properties:
>> +- compatible : Should be "fsl,<chip>-i2c"
>> +- reg : Should contain I2C/HS-I2C registers location and length
>> +- interrupts : Should contain I2C/HS-I2C interrupt
>> +
>> +Optional properties:
>> +- clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz.
>> + The absence of the propoerty indicates the default frequency 100 kHz.
>> +
>> +Examples:
>> +
>> +i2c@83fc4000 { /* I2C2 on i.MX51 */
>> + compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
>> + reg = <0x83fc4000 0x4000>;
>> + interrupts = <63>;
>> +};
>> +
>> +i2c@70038000 { /* HS-I2C on i.MX51 */
>> + compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
>> + reg = <0x70038000 0x4000>;
>> + interrupts = <64>;
>> + clock-frequency = <400000>;
>> +};
>
> It occurs to me that the clock-frequency field should be a standard
> used by all of-i2c drivers? could we have a standardised set of
> properties and a standard chunk of code that reads them?
>
Yes, "clock-frequency" is a common property for all clock frequency
binding, not only for of-i2c but all drivers that need to get clock
frequency from device tree. And it's a u32 and being read by the
common OF API of_property_read_u32(). So to answer your question,
both the binding and code have already been standard.
Regards,
Shawn
>> diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
>> index 54d809e..58832e5 100644
>> --- a/drivers/i2c/busses/i2c-imx.c
>> +++ b/drivers/i2c/busses/i2c-imx.c
>> @@ -48,6 +48,9 @@
>> #include <linux/platform_device.h>
>> #include <linux/clk.h>
>> #include <linux/slab.h>
>> +#include <linux/of.h>
>> +#include <linux/of_device.h>
>> +#include <linux/of_i2c.h>
>>
>> #include <mach/irqs.h>
>> #include <mach/hardware.h>
>> @@ -125,6 +128,11 @@ struct imx_i2c_struct {
>> unsigned int ifdr; /* IMX_I2C_IFDR */
>> };
>>
>> +static const struct of_device_id i2c_imx_dt_ids[] = {
>> + { .compatible = "fsl,imx1-i2c", },
>> + { /* sentinel */ }
>> +};
>> +
>> /** Functions for IMX I2C adapter driver ***************************************
>> *******************************************************************************/
>>
>> @@ -469,7 +477,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
>> struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
>> void __iomem *base;
>> resource_size_t res_size;
>> - int irq;
>> + int irq, bitrate;
>> int ret;
>>
>> dev_dbg(&pdev->dev, "<%s>\n", __func__);
>> @@ -512,6 +520,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
>> i2c_imx->adapter.algo = &i2c_imx_algo;
>> i2c_imx->adapter.dev.parent = &pdev->dev;
>> i2c_imx->adapter.nr = pdev->id;
>> + i2c_imx->adapter.dev.of_node = pdev->dev.of_node;
>> i2c_imx->irq = irq;
>> i2c_imx->base = base;
>> i2c_imx->res = res;
>> @@ -538,10 +547,12 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
>> i2c_set_adapdata(&i2c_imx->adapter, i2c_imx);
>>
>> /* Set up clock divider */
>> - if (pdata && pdata->bitrate)
>> - i2c_imx_set_clk(i2c_imx, pdata->bitrate);
>> - else
>> - i2c_imx_set_clk(i2c_imx, IMX_I2C_BIT_RATE);
>> + bitrate = IMX_I2C_BIT_RATE;
>> + ret = of_property_read_u32(pdev->dev.of_node,
>> + "clock-frequency", &bitrate);
>> + if (ret < 0 && pdata && pdata->bitrate)
>> + bitrate = pdata->bitrate;
>> + i2c_imx_set_clk(i2c_imx, bitrate);
>>
>> /* Set up chip registers to defaults */
>> writeb(0, i2c_imx->base + IMX_I2C_I2CR);
>> @@ -554,6 +565,8 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
>> goto fail5;
>> }
>>
>> + of_i2c_register_devices(&i2c_imx->adapter);
>> +
>> /* Set up platform driver data */
>> platform_set_drvdata(pdev, i2c_imx);
>>
>> @@ -584,7 +597,6 @@ fail1:
>> static int __exit i2c_imx_remove(struct platform_device *pdev)
>> {
>> struct imx_i2c_struct *i2c_imx = platform_get_drvdata(pdev);
>> - struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
>>
>> /* remove adapter */
>> dev_dbg(&i2c_imx->adapter.dev, "adapter removed\n");
>> @@ -613,6 +625,7 @@ static struct platform_driver i2c_imx_driver = {
>> .driver = {
>> .name = DRIVER_NAME,
>> .owner = THIS_MODULE,
>> + .of_match_table = i2c_imx_dt_ids,
>> }
>> };
>>
>> --
>> 1.7.4.1
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-i2c" in
>> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH v2 2/2] i2c/imx: add device tree probe support
@ 2011-08-02 8:35 ` Shawn Guo
0 siblings, 0 replies; 10+ messages in thread
From: Shawn Guo @ 2011-08-02 8:35 UTC (permalink / raw)
To: linux-arm-kernel
On 1 August 2011 22:25, Ben Dooks <ben-i2c@fluff.org> wrote:
> On Sun, Jul 31, 2011 at 02:21:27AM +0800, Shawn Guo wrote:
>> It adds device tree probe support for i2c-imx driver.
>>
>> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
>> Cc: Grant Likely <grant.likely@secretlab.ca>
>> Cc: Darius Augulis <augulis.darius@gmail.com>
>> Cc: Ben Dooks <ben-linux@fluff.org>
>> Acked-by: Grant Likely <grant.likely@secretlab.ca>
>> ---
>> ?.../devicetree/bindings/i2c/fsl-imx-i2c.txt ? ? ? ?| ? 25 ++++++++++++++++++++
>> ?drivers/i2c/busses/i2c-imx.c ? ? ? ? ? ? ? ? ? ? ? | ? 25 +++++++++++++++----
>> ?2 files changed, 44 insertions(+), 6 deletions(-)
>> ?create mode 100644 Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
>>
>> diff --git a/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
>> new file mode 100644
>> index 0000000..f3cf43b
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
>> @@ -0,0 +1,25 @@
>> +* Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX
>> +
>> +Required properties:
>> +- compatible : Should be "fsl,<chip>-i2c"
>> +- reg : Should contain I2C/HS-I2C registers location and length
>> +- interrupts : Should contain I2C/HS-I2C interrupt
>> +
>> +Optional properties:
>> +- clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz.
>> + ?The absence of the propoerty indicates the default frequency 100 kHz.
>> +
>> +Examples:
>> +
>> +i2c at 83fc4000 { /* I2C2 on i.MX51 */
>> + ? ? compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
>> + ? ? reg = <0x83fc4000 0x4000>;
>> + ? ? interrupts = <63>;
>> +};
>> +
>> +i2c at 70038000 { /* HS-I2C on i.MX51 */
>> + ? ? compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
>> + ? ? reg = <0x70038000 0x4000>;
>> + ? ? interrupts = <64>;
>> + ? ? clock-frequency = <400000>;
>> +};
>
> It occurs to me that the clock-frequency field should be a standard
> used by all of-i2c drivers? could we have a standardised set of
> properties and a standard chunk of code that reads them?
>
Yes, "clock-frequency" is a common property for all clock frequency
binding, not only for of-i2c but all drivers that need to get clock
frequency from device tree. And it's a u32 and being read by the
common OF API of_property_read_u32(). So to answer your question,
both the binding and code have already been standard.
Regards,
Shawn
>> diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
>> index 54d809e..58832e5 100644
>> --- a/drivers/i2c/busses/i2c-imx.c
>> +++ b/drivers/i2c/busses/i2c-imx.c
>> @@ -48,6 +48,9 @@
>> ?#include <linux/platform_device.h>
>> ?#include <linux/clk.h>
>> ?#include <linux/slab.h>
>> +#include <linux/of.h>
>> +#include <linux/of_device.h>
>> +#include <linux/of_i2c.h>
>>
>> ?#include <mach/irqs.h>
>> ?#include <mach/hardware.h>
>> @@ -125,6 +128,11 @@ struct imx_i2c_struct {
>> ? ? ? unsigned int ? ? ? ? ? ?ifdr; /* IMX_I2C_IFDR */
>> ?};
>>
>> +static const struct of_device_id i2c_imx_dt_ids[] = {
>> + ? ? { .compatible = "fsl,imx1-i2c", },
>> + ? ? { /* sentinel */ }
>> +};
>> +
>> ?/** Functions for IMX I2C adapter driver ***************************************
>> ?*******************************************************************************/
>>
>> @@ -469,7 +477,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
>> ? ? ? struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
>> ? ? ? void __iomem *base;
>> ? ? ? resource_size_t res_size;
>> - ? ? int irq;
>> + ? ? int irq, bitrate;
>> ? ? ? int ret;
>>
>> ? ? ? dev_dbg(&pdev->dev, "<%s>\n", __func__);
>> @@ -512,6 +520,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
>> ? ? ? i2c_imx->adapter.algo ? ? ? ? ? = &i2c_imx_algo;
>> ? ? ? i2c_imx->adapter.dev.parent ? ? = &pdev->dev;
>> ? ? ? i2c_imx->adapter.nr ? ? ? ? ? ? = pdev->id;
>> + ? ? i2c_imx->adapter.dev.of_node ? ?= pdev->dev.of_node;
>> ? ? ? i2c_imx->irq ? ? ? ? ? ? ? ? ? ?= irq;
>> ? ? ? i2c_imx->base ? ? ? ? ? ? ? ? ? = base;
>> ? ? ? i2c_imx->res ? ? ? ? ? ? ? ? ? ?= res;
>> @@ -538,10 +547,12 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
>> ? ? ? i2c_set_adapdata(&i2c_imx->adapter, i2c_imx);
>>
>> ? ? ? /* Set up clock divider */
>> - ? ? if (pdata && pdata->bitrate)
>> - ? ? ? ? ? ? i2c_imx_set_clk(i2c_imx, pdata->bitrate);
>> - ? ? else
>> - ? ? ? ? ? ? i2c_imx_set_clk(i2c_imx, IMX_I2C_BIT_RATE);
>> + ? ? bitrate = IMX_I2C_BIT_RATE;
>> + ? ? ret = of_property_read_u32(pdev->dev.of_node,
>> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?"clock-frequency", &bitrate);
>> + ? ? if (ret < 0 && pdata && pdata->bitrate)
>> + ? ? ? ? ? ? bitrate = pdata->bitrate;
>> + ? ? i2c_imx_set_clk(i2c_imx, bitrate);
>>
>> ? ? ? /* Set up chip registers to defaults */
>> ? ? ? writeb(0, i2c_imx->base + IMX_I2C_I2CR);
>> @@ -554,6 +565,8 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
>> ? ? ? ? ? ? ? goto fail5;
>> ? ? ? }
>>
>> + ? ? of_i2c_register_devices(&i2c_imx->adapter);
>> +
>> ? ? ? /* Set up platform driver data */
>> ? ? ? platform_set_drvdata(pdev, i2c_imx);
>>
>> @@ -584,7 +597,6 @@ fail1:
>> ?static int __exit i2c_imx_remove(struct platform_device *pdev)
>> ?{
>> ? ? ? struct imx_i2c_struct *i2c_imx = platform_get_drvdata(pdev);
>> - ? ? struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
>>
>> ? ? ? /* remove adapter */
>> ? ? ? dev_dbg(&i2c_imx->adapter.dev, "adapter removed\n");
>> @@ -613,6 +625,7 @@ static struct platform_driver i2c_imx_driver = {
>> ? ? ? .driver = {
>> ? ? ? ? ? ? ? .name ? = DRIVER_NAME,
>> ? ? ? ? ? ? ? .owner ?= THIS_MODULE,
>> + ? ? ? ? ? ? .of_match_table = i2c_imx_dt_ids,
>> ? ? ? }
>> ?};
>>
>> --
>> 1.7.4.1
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-i2c" in
>> the body of a message to majordomo at vger.kernel.org
>> More majordomo info at ?http://vger.kernel.org/majordomo-info.html
>
^ permalink raw reply [flat|nested] 10+ messages in thread
end of thread, other threads:[~2011-08-02 8:35 UTC | newest]
Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-07-30 18:21 [PATCH v2 0/2] Add device tree probe for i2c-imx driver Shawn Guo
2011-07-30 18:21 ` Shawn Guo
[not found] ` <1312050087-15701-1-git-send-email-shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2011-07-30 18:21 ` [PATCH v2 1/2] i2c/imx: remove init/exit hooks from platform data Shawn Guo
2011-07-30 18:21 ` Shawn Guo
2011-07-30 18:21 ` [PATCH v2 2/2] i2c/imx: add device tree probe support Shawn Guo
2011-07-30 18:21 ` Shawn Guo
[not found] ` <1312050087-15701-3-git-send-email-shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2011-08-01 21:25 ` Ben Dooks
2011-08-01 21:25 ` Ben Dooks
[not found] ` <20110801212516.GA22243-RazCHl0VsYgkUSuvROHNpA@public.gmane.org>
2011-08-02 8:35 ` Shawn Guo
2011-08-02 8:35 ` Shawn Guo
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