Re: [PATCH v3 04/12] soc: qcom: pmic_glink: register ucsi aux device

[Dmitry Baryshkov]

On 09/03/2023 15:27, Neil Armstrong wrote:
> Only register UCSI on know working devices, like on the SM8450
> or SM8550 which requires UCSI to get USB mode switch events.
>
> Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
> ---
>   drivers/soc/qcom/pmic_glink.c | 63 ++++++++++++++++++++++++++++++++++++-------
>   1 file changed, 53 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/soc/qcom/pmic_glink.c b/drivers/soc/qcom/pmic_glink.c
> index bb3fb57abcc6..48e015fee8e9 100644
> --- a/drivers/soc/qcom/pmic_glink.c
> +++ b/drivers/soc/qcom/pmic_glink.c
> @@ -4,6 +4,7 @@
>    * Copyright (c) 2022, Linaro Ltd
>    */
>   #include <linux/auxiliary_bus.h>
> +#include <linux/of_device.h>
>   #include <linux/module.h>
>   #include <linux/platform_device.h>
>   #include <linux/rpmsg.h>
> @@ -11,12 +12,23 @@
>   #include <linux/soc/qcom/pdr.h>
>   #include <linux/soc/qcom/pmic_glink.h>
>   
> +enum {
> +	PMIC_GLINK_CLIENT_BATT = 0,
> +	PMIC_GLINK_CLIENT_ALTMODE,
> +	PMIC_GLINK_CLIENT_UCSI,
> +};
> +
> +#define PMIC_GLINK_CLIENT_DEFAULT	(BIT(PMIC_GLINK_CLIENT_BATT) |	\
> +					 BIT(PMIC_GLINK_CLIENT_ALTMODE))
> +
>   struct pmic_glink {
>   	struct device *dev;
>   	struct pdr_handle *pdr;
>   
>   	struct rpmsg_endpoint *ept;
>   
> +	unsigned long client_mask;
> +
>   	struct auxiliary_device altmode_aux;
>   	struct auxiliary_device ps_aux;
>   	struct auxiliary_device ucsi_aux;
> @@ -233,6 +245,7 @@ static struct rpmsg_driver pmic_glink_rpmsg_driver = {
>   
>   static int pmic_glink_probe(struct platform_device *pdev)
>   {
> +	const struct of_device_id *match;
>   	struct pdr_service *service;
>   	struct pmic_glink *pg;
>   	int ret;
> @@ -249,12 +262,27 @@ static int pmic_glink_probe(struct platform_device *pdev)
>   	mutex_init(&pg->client_lock);
>   	mutex_init(&pg->state_lock);
>   
> -	ret = pmic_glink_add_aux_device(pg, &pg->altmode_aux, "altmode");
> -	if (ret)
> -		return ret;
> -	ret = pmic_glink_add_aux_device(pg, &pg->ps_aux, "power-supply");
> -	if (ret)
> -		goto out_release_altmode_aux;
> +	match = of_device_get_match_data(&pdev->dev);

This is incorrect. of_device_get_match_data() already returns 
match->data, rather than a matching of_device_id().

> +	if (match)
> +		pg->client_mask = (unsigned long)match->data;
> +	else
> +		pg->client_mask = PMIC_GLINK_CLIENT_DEFAULT;
> +
> +	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_UCSI)) {
> +		ret = pmic_glink_add_aux_device(pg, &pg->ucsi_aux, "ucsi");
> +		if (ret)
> +			return ret;
> +	}
> +	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_ALTMODE)) {
> +		ret = pmic_glink_add_aux_device(pg, &pg->altmode_aux, "altmode");
> +		if (ret)
> +			goto out_release_ucsi_aux;
> +	}
> +	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_BATT)) {
> +		ret = pmic_glink_add_aux_device(pg, &pg->ps_aux, "power-supply");
> +		if (ret)
> +			goto out_release_altmode_aux;
> +	}
>   
>   	pg->pdr = pdr_handle_alloc(pmic_glink_pdr_callback, pg);
>   	if (IS_ERR(pg->pdr)) {
> @@ -278,9 +306,14 @@ static int pmic_glink_probe(struct platform_device *pdev)
>   out_release_pdr_handle:
>   	pdr_handle_release(pg->pdr);
>   out_release_aux_devices:
> -	pmic_glink_del_aux_device(pg, &pg->ps_aux);
> +	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_BATT))
> +		pmic_glink_del_aux_device(pg, &pg->ps_aux);
>   out_release_altmode_aux:
> -	pmic_glink_del_aux_device(pg, &pg->altmode_aux);
> +	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_ALTMODE))
> +		pmic_glink_del_aux_device(pg, &pg->altmode_aux);
> +out_release_ucsi_aux:
> +	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_UCSI))
> +		pmic_glink_del_aux_device(pg, &pg->ucsi_aux);
>   
>   	return ret;
>   }
> @@ -291,8 +324,12 @@ static int pmic_glink_remove(struct platform_device *pdev)
>   
>   	pdr_handle_release(pg->pdr);
>   
> -	pmic_glink_del_aux_device(pg, &pg->ps_aux);
> -	pmic_glink_del_aux_device(pg, &pg->altmode_aux);
> +	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_BATT))
> +		pmic_glink_del_aux_device(pg, &pg->ps_aux);
> +	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_ALTMODE))
> +		pmic_glink_del_aux_device(pg, &pg->altmode_aux);
> +	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_UCSI))
> +		pmic_glink_del_aux_device(pg, &pg->ucsi_aux);
>   
>   	mutex_lock(&__pmic_glink_lock);
>   	__pmic_glink = NULL;
> @@ -301,7 +338,13 @@ static int pmic_glink_remove(struct platform_device *pdev)
>   	return 0;
>   }
>   
> +/* Do not handle altmode for now on those platforms */
> +static const unsigned long pmic_glink_sm8450_client_mask = BIT(PMIC_GLINK_CLIENT_BATT) |
> +							   BIT(PMIC_GLINK_CLIENT_UCSI);
> +
>   static const struct of_device_id pmic_glink_of_match[] = {
> +	{ .compatible = "qcom,sm8450-pmic-glink", .data = &pmic_glink_sm8450_client_mask },
> +	{ .compatible = "qcom,sm8550-pmic-glink", .data = &pmic_glink_sm8450_client_mask },
>   	{ .compatible = "qcom,pmic-glink", },
>   	{}
>   };

--
With best wishes
Dmitry