Re: [PATCH-v4 1/3] mfd: 88pm800: Add device tree support

Lee Jones
2015-06-25T10:19:16Z

On Thu, 25 Jun 2015, Vaibhav Hiremath wrote:

> Add DT support to the 88pm800 driver, along with compatible
> field for it's sub-devices (rtc, onkey and regulator)
>
> Signed-off-by: Chao Xie <chao.xie@marvell.com>
> Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
> ---
> drivers/mfd/88pm800.c | 23 +++++++++++++++++++++++
> 1 file changed, 23 insertions(+)
>
> diff --git a/drivers/mfd/88pm800.c b/drivers/mfd/88pm800.c
> index 841717a..40fd014 100644
> --- a/drivers/mfd/88pm800.c
> +++ b/drivers/mfd/88pm800.c
> @@ -27,6 +27,7 @@
> #include <linux/mfd/core.h>
> #include <linux/mfd/88pm80x.h>
> #include <linux/slab.h>
> +#include <linux/of_device.h>
>
> /* Interrupt Registers */
> #define PM800_INT_STATUS1 (0x05)
> @@ -121,6 +122,11 @@ static const struct i2c_device_id pm80x_id_table[] = {
> };
> MODULE_DEVICE_TABLE(i2c, pm80x_id_table);
>
> +static const struct of_device_id pm80x_of_match_table[] = {
> + { .compatible = "marvell,88pm800", },
> + {},
> +};
> +
> static struct resource rtc_resources[] = {
> {
> .name = "88pm80x-rtc",
> @@ -133,6 +139,7 @@ static struct resource rtc_resources[] = {
> static struct mfd_cell rtc_devs[] = {
> {
> .name = "88pm80x-rtc",
> + .of_compatible = "marvell,88pm80x-rtc",
> .num_resources = ARRAY_SIZE(rtc_resources),
> .resources = &rtc_resources[0],
> .id = -1,
> @@ -151,6 +158,7 @@ static struct resource onkey_resources[] = {
> static const struct mfd_cell onkey_devs[] = {
> {
> .name = "88pm80x-onkey",
> + .of_compatible = "marvell,88pm80x-onkey",
> .num_resources = 1,
> .resources = &onkey_resources[0],
> .id = -1,
> @@ -160,6 +168,7 @@ static const struct mfd_cell onkey_devs[] = {
> static const struct mfd_cell regulator_devs[] = {
> {
> .name = "88pm80x-regulator",
> + .of_compatible = "marvell,88pm80x-regulator",
> .id = -1,
> },
> };
> @@ -544,8 +553,21 @@ static int pm800_probe(struct i2c_client *client,
> int ret = 0;
> struct pm80x_chip *chip;
> struct pm80x_platform_data *pdata = dev_get_platdata(&client->dev);
> + struct device_node *np = client->dev.of_node;
> struct pm80x_subchip *subchip;
>
> + if (!pdata && !np) {
> + dev_err(&client->dev,
> + "pm80x requires platform data or of_node\n");
> + return -EINVAL;
> + }
> +
> + if (!pdata) {
> + pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
> + if (!pdata)
> + return -ENOMEM;
> + }

Why have you allocated data for pdata, then done nothing with it?

> ret = pm80x_init(client);
> if (ret) {
> dev_err(&client->dev, "pm800_init fail\n");
> @@ -611,6 +633,7 @@ static struct i2c_driver pm800_driver = {
> .name = "88PM800",
> .owner = THIS_MODULE,
> .pm = &pm80x_pm_ops,
> + .of_match_table = pm80x_of_match_table,
> },
> .probe = pm800_probe,
> .remove = pm800_remove,

--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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