Re: [PATCH v5 04/12] soc: qcom: pmic_glink: register ucsi aux device

From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: Neil Armstrong <neil.armstrong@linaro.org>,
	Heikki Krogerus <heikki.krogerus@linux.intel.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Andy Gross <agross@kernel.org>,
	Bjorn Andersson <andersson@kernel.org>,
	Konrad Dybcio <konrad.dybcio@linaro.org>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v5 04/12] soc: qcom: pmic_glink: register ucsi aux device
Date: Tue, 21 Mar 2023 17:38:05 +0200	[thread overview]
Message-ID: <7ef646e0-388e-b2ef-a28c-f1fcce486203@linaro.org> (raw)
In-Reply-To: <20230130-topic-sm8450-upstream-pmic-glink-v5-4-552f3b721f9e@linaro.org>

On 21/03/2023 15:21, 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@linaro.org>

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Two nits below:

> ---
>   drivers/soc/qcom/pmic_glink.c | 65 +++++++++++++++++++++++++++++++++++--------
>   1 file changed, 54 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/soc/qcom/pmic_glink.c b/drivers/soc/qcom/pmic_glink.c
> index bb3fb57abcc6..8bf95df0a56a 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 unsigned long *match_data;
>   	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_data = (unsigned long *)of_device_get_match_data(&pdev->dev);

Nit: type cast should not be necessary here.

> +	if (match_data)
> +		pg->client_mask = *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;
> @@ -301,8 +338,14 @@ 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,pmic-glink", },

Nit: one can leave comma in place to remove noise.

> +	{ .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" },
>   	{}
>   };
>   MODULE_DEVICE_TABLE(of, pmic_glink_of_match);
> 

-- 
With best wishes
Dmitry