Re: [RESEND PATCH 3/8] mfd: cros_ec: Instantiate sub-devices from device tree

Lee Jones
2015-04-29T10:39:51Z

On Mon, 06 Apr 2015, Javier Martinez Canillas wrote:

> From: Todd Broch <tbroch@chromium.org>
>
> If the EC device tree node has sub-nodes, try to instantiate them as
> MFD sub-devices. We can configure the EC features provided by the board.
>
> Signed-off-by: Todd Broch <tbroch@chromium.org>
> Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
> ---
> drivers/mfd/cros_ec.c | 22 +++++++++++-----------
> 1 file changed, 11 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
> index c4aecc6f8373..8aa83b91e25c 100644
> --- a/drivers/mfd/cros_ec.c
> +++ b/drivers/mfd/cros_ec.c
> @@ -17,6 +17,7 @@
> * battery charging and regulator control, firmware update.
> */
>
> +#include <linux/of_platform.h>
> #include <linux/interrupt.h>
> #include <linux/slab.h>
> #include <linux/module.h>
> @@ -109,18 +110,8 @@ EXPORT_SYMBOL(cros_ec_cmd_xfer);
>
> static const struct mfd_cell cros_devs[] = {
> {
> - .name = "cros-ec-keyb",
> - .id = 1,
> - .of_compatible = "google,cros-ec-keyb",
> - },
> - {
> - .name = "cros-ec-i2c-tunnel",
> - .id = 2,
> - .of_compatible = "google,cros-ec-i2c-tunnel",
> - },
> - {
> .name = "cros-ec-ctl",
> - .id = 3,
> + .id = 1,

Can't you use PLATFORM_DEVID_AUTO?

> },
> };
>
> @@ -150,6 +141,15 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
> return err;
> }
>
> +#ifdef CONFIG_OF
> + err = of_platform_populate(dev->of_node, NULL, NULL, dev);
> + if (err) {
> + mfd_remove_devices(dev);
> + dev_err(dev, "Failed to register sub-devices\n");
> + return err;
> + }
> +#endif

And if we don't support OF?

> dev_info(dev, "Chrome EC device registered\n");
>
> return 0;

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