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Date: Wed, 13 Feb 2013 16:35:14 +0530
From: Naveen Krishna Ch <naveenkrishna.ch@...il.com>
To: Guenter Roeck <linux@...ck-us.net>
Cc: Naveen Krishna Chatradhi <ch.naveen@...sung.com>,
linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
"linux-samsung-soc@...r.kernel.org"
<linux-samsung-soc@...r.kernel.org>, dianders@...omium.org,
gregkh@...uxfoundation.org, lars@...afoo.de
Subject: Re: iio: adc: add exynos5 adc driver under iio framwork
Hello Guenter,
I've s setup like the below one, kindly, help me find the right device
tree not params
ADC 0
1
1
1
1
On 13 February 2013 08:18, Naveen Krishna Ch <naveenkrishna.ch@...il.com> wrote:
> On 13 February 2013 02:37, Guenter Roeck <linux@...ck-us.net> wrote:
>> On Wed, Jan 23, 2013 at 04:58:06AM -0000, Naveen Krishna Chatradhi wrote:
>>> This patch add an ADC IP found on EXYNOS5 series socs from Samsung.
>>> Also adds the Documentation for device tree bindings.
>>>
>>> Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@...sung.com>
>>>
>>> ---
>>> Changes since v1:
>>>
>>> 1. Fixed comments from Lars
>>> 2. Added support for ADC on EXYNOS5410
>>>
>>> Changes since v2:
>>>
>>> 1. Changed the instance name for (struct iio_dev *) to indio_dev
>>> 2. Changed devm_request_irq to request_irq
>>>
>>> Few doubts regarding the mappings and child device handling.
>>> Kindly, suggest me better methods.
>>>
>>> .../bindings/arm/samsung/exynos5-adc.txt | 37 ++
>>> drivers/iio/adc/Kconfig | 7 +
>>> drivers/iio/adc/Makefile | 1 +
>>> drivers/iio/adc/exynos5_adc.c | 464 ++++++++++++++++++++
>>> 4 files changed, 509 insertions(+)
>>> create mode 100644 Documentation/devicetree/bindings/arm/samsung/exynos5-adc.txt
>>> create mode 100644 drivers/iio/adc/exynos5_adc.c
>>>
>>> diff --git a/Documentation/devicetree/bindings/arm/samsung/exynos5-adc.txt b/Documentation/devicetree/bindings/arm/samsung/exynos5-adc.txt
>>> new file mode 100644
>>> index 0000000..9a5b515
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/arm/samsung/exynos5-adc.txt
>>> @@ -0,0 +1,37 @@
>>> +Samsung Exynos5 Analog to Digital Converter bindings
>>> +
>>> +Required properties:
>>> +- compatible: Must be "samsung,exynos5250-adc" for exynos5250 controllers.
>>> +- reg: Contains ADC register address range (base address and
>>> + length).
>>> +- interrupts: Contains the interrupt information for the timer. The
>>> + format is being dependent on which interrupt controller
>>> + the Samsung device uses.
>>> +
>>> +Note: child nodes can be added for auto probing from device tree.
>>> +
>>> +Example: adding device info in dtsi file
>>> +
>>> +adc@...10000 {
>>> + compatible = "samsung,exynos5250-adc";
>>> + reg = <0x12D10000 0x100>;
>>> + interrupts = <0 106 0>;
>>> + #address-cells = <1>;
>>> + #size-cells = <1>;
>>> + ranges;
>>> +};
>>> +
>>> +
>>> +Example: Adding child nodes in dts file
>>> +
>>> +adc@...10000 {
>>> +
>>> + /* NTC thermistor is a hwmon device */
>>> + ncp15wb473@0 {
>>> + compatible = "ntc,ncp15wb473";
>>> + reg = <0x0>;
>>> + pullup-uV = <1800000>;
>>> + pullup-ohm = <47000>;
>>> + pulldown-ohm = <0>;
>>> + };
>>> +};
>>
>> How about:
>>
>> adc: adc@...10000 {
>> compatible = "samsung,exynos5250-adc";
>> reg = <0x12D10000 0x100>;
>> interrupts = <0 106 0>;
>> #io-channel-cells = <1>;
>> };
>>
>> ...
>>
>> ncp15wb473@0 {
>> compatible = "ntc,ncp15wb473";
>> reg = <0x0>; /* is this needed ? */
>> io-channels = <&adc 0>;
>> io-channel-names = "adc";
>> pullup-uV = <1800000>; /* uV or uv ? */
>> pullup-ohm = <47000>;
>> pulldown-ohm = <0>;
>> };
>>
>> The ncp15wb473 driver would then use either iio_channel_get_all() to get the iio
>> channel list or, if it only supports one adc channel per instance, iio_channel_get().
>>
>> In that context, it would probably make sense to rework the ntc_thermistor
>> driver to support both DT as well as direct instantiation using access functions
>> and platform data (as it does today).
>>
>> Also see https://patchwork.kernel.org/patch/2112171/.
>>
>> Thanks,
>> Guenter
> Yes Guenter, I will rebase and submit the ADC driver based on your patch set.
>>
>>> diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
>>> index fe822a1..33ceabf 100644
>>> --- a/drivers/iio/adc/Kconfig
>>> +++ b/drivers/iio/adc/Kconfig
>>> @@ -91,6 +91,13 @@ config AT91_ADC
>>> help
>>> Say yes here to build support for Atmel AT91 ADC.
>>>
>>> +config EXYNOS5_ADC
>>> + bool "Exynos5 ADC driver support"
>>> + help
>>> + Core support for the ADC block found in the Samsung EXYNOS5 series
>>> + of SoCs for drivers such as the touchscreen and hwmon to use to share
>>> + this resource.
>>> +
>>> config LP8788_ADC
>>> bool "LP8788 ADC driver"
>>> depends on MFD_LP8788
>>> diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
>>> index 2d5f100..5b4a4f6 100644
>>> --- a/drivers/iio/adc/Makefile
>>> +++ b/drivers/iio/adc/Makefile
>>> @@ -10,6 +10,7 @@ obj-$(CONFIG_AD7791) += ad7791.o
>>> obj-$(CONFIG_AD7793) += ad7793.o
>>> obj-$(CONFIG_AD7887) += ad7887.o
>>> obj-$(CONFIG_AT91_ADC) += at91_adc.o
>>> +obj-$(CONFIG_EXYNOS5_ADC) += exynos5_adc.o
>>> obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o
>>> obj-$(CONFIG_MAX1363) += max1363.o
>>> obj-$(CONFIG_TI_ADC081C) += ti-adc081c.o
>>> diff --git a/drivers/iio/adc/exynos5_adc.c b/drivers/iio/adc/exynos5_adc.c
>>> new file mode 100644
>>> index 0000000..8982675
>>> --- /dev/null
>>> +++ b/drivers/iio/adc/exynos5_adc.c
>>> @@ -0,0 +1,464 @@
>>> +/*
>>> + * exynos5_adc.c - Support for ADC in EXYNOS5 SoCs
>>> + *
>>> + * 8 ~ 10 channel, 10/12-bit ADC
>>> + *
>>> + * Copyright (C) 2013 Naveen Krishna Chatradhi <ch.naveen@...sung.com>
>>> + *
>>> + * 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 Free Software Foundation; either version 2 of the License, or
>>> + * (at your option) any later version.
>>> + *
>>> + * This program is distributed in the hope that it will be useful,
>>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>>> + * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
>>> + */
>>> +
>>> +#include <linux/module.h>
>>> +#include <linux/platform_device.h>
>>> +#include <linux/interrupt.h>
>>> +#include <linux/delay.h>
>>> +#include <linux/kernel.h>
>>> +#include <linux/slab.h>
>>> +#include <linux/io.h>
>>> +#include <linux/clk.h>
>>> +#include <linux/completion.h>
>>> +#include <linux/of.h>
>>> +#include <linux/of_irq.h>
>>> +#include <linux/regulator/consumer.h>
>>> +#include <linux/of_platform.h>
>>> +
>>> +#include <linux/iio/iio.h>
>>> +#include <linux/iio/machine.h>
>>> +#include <linux/iio/driver.h>
>>> +
>>> +enum adc_version {
>>> + ADC_V1,
>>> + ADC_V2
>>> +};
>>> +
>>> +/* EXYNOS5250 ADC_V1 registers definitions */
>>> +#define ADC_V1_CON(x) ((x) + 0x00)
>>> +#define ADC_V1_DLY(x) ((x) + 0x08)
>>> +#define ADC_V1_DATX(x) ((x) + 0x0C)
>>> +#define ADC_V1_INTCLR(x) ((x) + 0x18)
>>> +#define ADC_V1_MUX(x) ((x) + 0x1c)
>>> +
>>> +/* EXYNOS5410 ADC_V2 registers definitions */
>>> +#define ADC_V2_CON1(x) ((x) + 0x00)
>>> +#define ADC_V2_CON2(x) ((x) + 0x04)
>>> +#define ADC_V2_STAT(x) ((x) + 0x08)
>>> +#define ADC_V2_INT_EN(x) ((x) + 0x10)
>>> +#define ADC_V2_INT_ST(x) ((x) + 0x14)
>>> +#define ADC_V2_VER(x) ((x) + 0x20)
>>> +
>>> +/* Bit definitions for ADC_V1 */
>>> +#define ADC_V1_CON_RES (1u << 16)
>>> +#define ADC_V1_CON_PRSCEN (1u << 14)
>>> +#define ADC_V1_CON_PRSCLV(x) (((x) & 0xFF) << 6)
>>> +#define ADC_V1_CON_STANDBY (1u << 2)
>>> +
>>> +/* Bit definitions for ADC_V2 */
>>> +#define ADC_V2_CON1_SOFT_RESET (1u << 2)
>>> +
>>> +#define ADC_V2_CON2_OSEL (1u << 10)
>>> +#define ADC_V2_CON2_ESEL (1u << 9)
>>> +#define ADC_V2_CON2_HIGHF (1u << 8)
>>> +#define ADC_V2_CON2_C_TIME(x) (((x) & 7) << 4)
>>> +#define ADC_V2_CON2_ACH_SEL(x) (((x) & 0xF) << 0)
>>> +#define ADC_V2_CON2_ACH_MASK 0xF
>>> +
>>> +/* Bit definitions common for ADC_V1 and ADC_V2 */
>>> +#define ADC_V1_CON_EN_START (1u << 0)
>>> +#define ADC_V1_DATX_MASK 0xFFF
>>> +
>>> +struct exynos5_adc {
>>> + void __iomem *regs;
>>> + struct clk *clk;
>>> + unsigned int irq;
>>> + struct regulator *vdd;
>>> +
>>> + struct completion completion;
>>> +
>>> + struct iio_map *map;
>>> + u32 value;
>>> + unsigned int version;
>>> +};
>>> +
>>> +static const struct of_device_id exynos5_adc_match[] = {
>>> + { .compatible = "samsung,exynos5250-adc", .data = (void *)ADC_V1 },
>>> + { .compatible = "samsung,exynos5410-adc", .data = (void *)ADC_V2 },
>>> + {},
>>> +};
>>> +MODULE_DEVICE_TABLE(of, exynos5_adc_match);
>>> +
>>> +static inline unsigned int exynos5_adc_get_version(struct platform_device *pdev)
>>> +{
>>> + const struct of_device_id *match;
>>> +
>>> + match = of_match_node(exynos5_adc_match, pdev->dev.of_node);
>>> + return (unsigned int)match->data;
>>> +}
>>> +
>>> +/* default maps used by iio consumer (ex: ntc-thermistor driver) */
>>> +static struct iio_map exynos5_adc_iio_maps[] = {
>>> + {
>>> + .consumer_dev_name = "0.ncp15wb473",
>>> + .consumer_channel = "adc3",
>>> + .adc_channel_label = "adc3",
>>> + },
>>> + {
>>> + .consumer_dev_name = "1.ncp15wb473",
>>> + .consumer_channel = "adc4",
>>> + .adc_channel_label = "adc4",
>>> + },
>>> + {
>>> + .consumer_dev_name = "2.ncp15wb473",
>>> + .consumer_channel = "adc5",
>>> + .adc_channel_label = "adc5",
>>> + },
>>> + {
>>> + .consumer_dev_name = "3.ncp15wb473",
>>> + .consumer_channel = "adc6",
>>> + .adc_channel_label = "adc6",
>>> + },
>>> + {},
>>> +};
>>> +
>>> +static int exynos5_read_raw(struct iio_dev *indio_dev,
>>> + struct iio_chan_spec const *chan,
>>> + int *val,
>>> + int *val2,
>>> + long mask)
>>> +{
>>> + struct exynos5_adc *info = iio_priv(indio_dev);
>>> + u32 con1, con2;
>>> +
>>> + if (mask == IIO_CHAN_INFO_RAW) {
>>> + mutex_lock(&indio_dev->mlock);
>>> +
>>> + /* Select the channel to be used and Trigger conversion */
>>> + if (info->version == ADC_V2) {
>>> + con2 = readl(ADC_V2_CON2(info->regs));
>>> + con2 &= ~ADC_V2_CON2_ACH_MASK;
>>> + con2 |= ADC_V2_CON2_ACH_SEL(chan->address);
>>> + writel(con2, ADC_V2_CON2(info->regs));
>>> +
>>> + con1 = readl(ADC_V2_CON1(info->regs));
>>> + writel(con1 | ADC_V1_CON_EN_START,
>>> + ADC_V2_CON1(info->regs));
>>> + } else {
>>> + writel(chan->address, ADC_V1_MUX(info->regs));
>>> +
>>> + con1 = readl(ADC_V1_CON(info->regs));
>>> + writel(con1 | ADC_V1_CON_EN_START,
>>> + ADC_V1_CON(info->regs));
>>> + }
>>> +
>>> + wait_for_completion(&info->completion);
>>> + *val = info->value;
>>> +
>>> + mutex_unlock(&indio_dev->mlock);
>>> +
>>> + return IIO_VAL_INT;
>>> + }
>>> +
>>> + return -EINVAL;
>>> +}
>>> +
>>> +static irqreturn_t exynos5_adc_isr(int irq, void *dev_id)
>>> +{
>>> + struct exynos5_adc *info = (struct exynos5_adc *)dev_id;
>>> +
>>> + /* Read value */
>>> + info->value = readl(ADC_V1_DATX(info->regs)) &
>>> + ADC_V1_DATX_MASK;
>>> + /* clear irq */
>>> + if (info->version == ADC_V2)
>>> + writel(1, ADC_V2_INT_ST(info->regs));
>>> + else
>>> + writel(1, ADC_V1_INTCLR(info->regs));
>>> +
>>> + complete(&info->completion);
>>> +
>>> + return IRQ_HANDLED;
>>> +}
>>> +
>>> +static int exynos5_adc_reg_access(struct iio_dev *indio_dev,
>>> + unsigned reg, unsigned writeval,
>>> + unsigned *readval)
>>> +{
>>> + struct exynos5_adc *info = iio_priv(indio_dev);
>>> + u32 ret;
>>> +
>>> + mutex_lock(&indio_dev->mlock);
>>> +
>>> + if (readval != NULL) {
>>> + ret = readl(info->regs + reg);
>>> + *readval = ret;
>>> + } else
>>> + ret = -EINVAL;
>>> +
>>> + mutex_unlock(&indio_dev->mlock);
>>> +
>>> + return ret;
>>> +}
>>> +
>>> +static const struct iio_info exynos5_adc_iio_info = {
>>> + .read_raw = &exynos5_read_raw,
>>> + .debugfs_reg_access = &exynos5_adc_reg_access,
>>> + .driver_module = THIS_MODULE,
>>> +};
>>> +
>>> +#define ADC_V1_CHANNEL(_index, _id) { \
>>> + .type = IIO_VOLTAGE, \
>>> + .indexed = 1, \
>>> + .channel = _index, \
>>> + .address = _index, \
>>> + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, \
>>> + .datasheet_name = _id, \
>>> +}
>>> +
>>> +/** ADC core in EXYNOS5410 has 10 channels,
>>> + * ADC core in EXYNOS5250 has 8 channels
>>> +*/
>>> +static const struct iio_chan_spec exynos5_adc_iio_channels[] = {
>>> + ADC_V1_CHANNEL(0, "adc0"),
>>> + ADC_V1_CHANNEL(1, "adc1"),
>>> + ADC_V1_CHANNEL(2, "adc2"),
>>> + ADC_V1_CHANNEL(3, "adc3"),
>>> + ADC_V1_CHANNEL(4, "adc4"),
>>> + ADC_V1_CHANNEL(5, "adc5"),
>>> + ADC_V1_CHANNEL(6, "adc6"),
>>> + ADC_V1_CHANNEL(7, "adc7"),
>>> + ADC_V1_CHANNEL(8, "adc8"),
>>> + ADC_V1_CHANNEL(9, "adc9"),
>>> +};
>>> +
>>> +static int exynos5_adc_remove_devices(struct device *dev, void *c)
>>> +{
>>> + struct platform_device *pdev = to_platform_device(dev);
>>> +
>>> + platform_device_unregister(pdev);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static void exynos5_adc_hw_init(struct exynos5_adc *info)
>>> +{
>>> + u32 con1, con2;
>>> +
>>> + if (info->version == ADC_V2) {
>>> + con1 = ADC_V2_CON1_SOFT_RESET;
>>> + writel(con1, ADC_V2_CON1(info->regs));
>>> +
>>> + con2 = ADC_V2_CON2_OSEL | ADC_V2_CON2_ESEL |
>>> + ADC_V2_CON2_HIGHF | ADC_V2_CON2_C_TIME(0);
>>> + writel(con2, ADC_V2_CON2(info->regs));
>>> +
>>> + /* Enable interrupts */
>>> + writel(1, ADC_V2_INT_EN(info->regs));
>>> + } else {
>>> + /* set default prescaler values and Enable prescaler */
>>> + con1 = ADC_V1_CON_PRSCLV(49) | ADC_V1_CON_PRSCEN;
>>> +
>>> + /* Enable 12-bit ADC resolution */
>>> + con1 |= ADC_V1_CON_RES;
>>> + writel(con1, ADC_V1_CON(info->regs));
>>> + }
>>> +}
>>> +
>>> +static int exynos5_adc_probe(struct platform_device *pdev)
>>> +{
>>> + struct exynos5_adc *info = NULL;
>>> + struct device_node *np = pdev->dev.of_node;
>>> + struct iio_dev *indio_dev = NULL;
>>> + struct resource *mem;
>>> + int ret = -ENODEV;
>>> + int irq;
>>> +
>>> + if (!np)
>>> + return ret;
>>> +
>>> + indio_dev = iio_device_alloc(sizeof(struct exynos5_adc));
>>> + if (!indio_dev) {
>>> + dev_err(&pdev->dev, "failed allocating iio device\n");
>>> + return -ENOMEM;
>>> + }
>>> +
>>> + info = iio_priv(indio_dev);
>>> +
>>> + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>>> +
>>> + info->regs = devm_request_and_ioremap(&pdev->dev, mem);
>>> +
>>> + irq = platform_get_irq(pdev, 0);
>>> + if (irq < 0) {
>>> + dev_err(&pdev->dev, "no irq resource?\n");
>>> + ret = irq;
>>> + goto err_iio;
>>> + }
>>> +
>>> + info->irq = irq;
>>> +
>>> + ret = request_irq(info->irq, exynos5_adc_isr,
>>> + 0, dev_name(&pdev->dev), info);
>>> + if (ret < 0) {
>>> + dev_err(&pdev->dev, "failed requesting irq, irq = %d\n",
>>> + info->irq);
>>> + goto err_iio;
>>> + }
>>> +
>>> + info->clk = devm_clk_get(&pdev->dev, "adc");
>>> + if (IS_ERR(info->clk)) {
>>> + dev_err(&pdev->dev, "failed getting clock, err = %ld\n",
>>> + PTR_ERR(info->clk));
>>> + ret = PTR_ERR(info->clk);
>>> + goto err_irq;
>>> + }
>>> +
>>> + info->vdd = devm_regulator_get(&pdev->dev, "vdd");
>>> + if (IS_ERR(info->vdd)) {
>>> + dev_err(&pdev->dev, "failed getting regulator, err = %ld\n",
>>> + PTR_ERR(info->vdd));
>>> + ret = PTR_ERR(info->vdd);
>>> + goto err_irq;
>>> + }
>>> +
>>> + info->version = exynos5_adc_get_version(pdev);
>>> +
>>> + platform_set_drvdata(pdev, indio_dev);
>>> +
>>> + init_completion(&info->completion);
>>> +
>>> + indio_dev->name = dev_name(&pdev->dev);
>>> + indio_dev->dev.parent = &pdev->dev;
>>> + indio_dev->dev.of_node = pdev->dev.of_node;
>>> + indio_dev->info = &exynos5_adc_iio_info;
>>> + indio_dev->modes = INDIO_DIRECT_MODE;
>>> + indio_dev->channels = exynos5_adc_iio_channels;
>>> + indio_dev->num_channels = ARRAY_SIZE(exynos5_adc_iio_channels);
>>> +
>>> + info->map = exynos5_adc_iio_maps;
>>> +
>>> + ret = iio_map_array_register(indio_dev, info->map);
>>> + if (ret) {
>>> + dev_err(&indio_dev->dev, "failed mapping iio, err: %d\n", ret);
>>> + goto err_irq;
>>> + }
>>> +
>>> + ret = iio_device_register(indio_dev);
>>> + if (ret)
>>> + goto err_map;
>>> +
>>> + ret = regulator_enable(info->vdd);
>>> + if (ret)
>>> + goto err_iio_dev;
>>> +
>>> + clk_prepare_enable(info->clk);
>>> +
>>> + exynos5_adc_hw_init(info);
>>> +
>>> + ret = of_platform_populate(np, exynos5_adc_match, NULL, &pdev->dev);
>>> + if (ret < 0) {
>>> + dev_err(&pdev->dev, "failed adding child nodes\n");
>>> + goto err_of_populate;
>>> + }
>>> +
>>> + return 0;
>>> +
>>> +err_of_populate:
>>> + device_for_each_child(&pdev->dev, NULL, exynos5_adc_remove_devices);
>>> +err_iio_dev:
>>> + iio_device_unregister(indio_dev);
>>> +err_map:
>>> + iio_map_array_unregister(indio_dev, info->map);
>>> +err_irq:
>>> + free_irq(info->irq, info);
>>> +err_iio:
>>> + iio_device_free(indio_dev);
>>> + return ret;
>>> +}
>>> +
>>> +static int exynos5_adc_remove(struct platform_device *pdev)
>>> +{
>>> + struct iio_dev *indio_dev = platform_get_drvdata(pdev);
>>> + struct exynos5_adc *info = iio_priv(indio_dev);
>>> +
>>> + iio_device_unregister(indio_dev);
>>> + iio_map_array_unregister(indio_dev, info->map);
>>> + free_irq(info->irq, info);
>>> + iio_device_free(indio_dev);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +#ifdef CONFIG_PM_SLEEP
>>> +static int exynos5_adc_suspend(struct device *dev)
>>> +{
>>> + struct exynos5_adc *info = dev_get_data(dev);
>>> + u32 con;
>>> +
>>> + if (info->version == ADC_V2) {
>>> + con = readl(ADC_V2_CON1(info->regs));
>>> + con &= ~ADC_V1_CON_EN_START;
>>> + writel(con, ADC_V2_CON1(info->regs));
>>> + } else {
>>> + con = readl(ADC_V1_CON(info->regs));
>>> + con |= ADC_V1_CON_STANDBY;
>>> + writel(con, ADC_V1_CON(info->regs));
>>> + }
>>> +
>>> + clk_unprepare_disable(info->clk);
>>> + regulator_disable(info->vdd);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static int exynos5_adc_resume(struct device *dev)
>>> +{
>>> + struct exynos5_adc *info = dev_get_data(dev);
>>> + int ret;
>>> +
>>> + ret = regulator_enable(info->vdd);
>>> + if (ret)
>>> + return ret;
>>> +
>>> + clk_prepare_enable(info->clk);
>>> +
>>> + exynos5_adc_hw_init(info);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +#else
>>> +#define exynos5_adc_suspend NULL
>>> +#define exynos5_adc_resume NULL
>>> +#endif
>>> +
>>> +static SIMPLE_DEV_PM_OPS(exynos5_adc_pm_ops,
>>> + exynos5_adc_suspend,
>>> + exynos5_adc_resume);
>>> +
>>> +static struct platform_driver exynos5_adc_driver = {
>>> + .probe = exynos5_adc_probe,
>>> + .remove = exynos5_adc_remove,
>>> + .driver = {
>>> + .name = "exynos5-adc",
>>> + .owner = THIS_MODULE,
>>> + .of_match_table = of_match_ptr(exynos5_adc_match),
>>> + .pm = &exynos5_adc_pm_ops,
>>> + },
>>> +};
>>> +
>>> +module_platform_driver(exynos5_adc_driver);
>>> +
>>> +MODULE_AUTHOR("Naveen Krishna Chatradhi <ch.naveen@...sung.com>");
>>> +MODULE_DESCRIPTION("Samsung EXYNOS5 ADC driver");
>>> +MODULE_LICENSE("GPL");
>
>
>
> --
> Shine bright,
> (: Nav :)
--
Shine bright,
(: Nav :)
--
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