On Sat, 09 May 2015, Javier Martinez Canillas wrote:
> From: Todd Broch <tbroch@xxxxxxxxxxxx>
>
> 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@xxxxxxxxxxxx>
> Signed-off-by: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx>
> Tested-by: Heiko Stuebner <heiko@xxxxxxxxx>
> Reviewed-by: Gwendal Grignou <gwendal@xxxxxxxxxxxx>
> Tested-by: Gwendal Grignou <gwendal@xxxxxxxxxxxx>
> ---
>
> Changes since v1:
> - Added Heiko Stuebner and Gwendal Grignou Tested-by tag
> - Added Gwendal Grignou Reviewed-by tag
> - Use automatic device ID instead of 1 as suggested by Lee Jones
> - Remove #ifdeffery and check for of_node to register sub-devices
> Suggested by Lee Jones
> ---
> 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..1574a9352a6d 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 = PLATFORM_DEVID_AUTO,
> },
> };
>
> @@ -150,6 +141,15 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
> return err;
> }
>
> + if (IS_ENABLED(CONFIG_OF) && dev->of_node) {
You don't need to check for OF. of_node will be NULL if OF isn't
enabled.
> + 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;
> + }
> + }
> +
> 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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