linux-kernel - Re: [PATCH 06/18] staging: typec: fusb302: Get max snk mv/ma/mw from device-properties

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Date:   Sun, 6 Aug 2017 07:03:20 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Hans de Goede <hdegoede@...hat.com>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Wolfram Sang <wsa@...-dreams.de>,
        Sebastian Reichel <sre@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org, Liam Breck <liam@...workimprov.net>,
        Tony Lindgren <tony@...mide.com>, linux-pm@...r.kernel.org,
        devel@...verdev.osuosl.org
Subject: Re: [PATCH 06/18] staging: typec: fusb302: Get max snk mv/ma/mw from
 device-properties

On 08/06/2017 05:35 AM, Hans de Goede wrote:
> This is board specific info so it should come from board config, such
> as devicetree.
> 
> I've chosen to prefix these with "fcs," treating them as fusb302 driver
> specific. We may want to revisit to replace these with properties which
> are part of a (to be written) generic type-c controller devicetree
> binding.
> 
You might want to add dt maintainers here.

> Signed-off-by: Hans de Goede <hdegoede@...hat.com> > ---
>   drivers/staging/typec/TODO              |  5 +++++
>   drivers/staging/typec/fusb302/fusb302.c | 18 +++++++++++++++++-
>   2 files changed, 22 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/typec/TODO b/drivers/staging/typec/TODO
> index bc1f97a2d1bf..98b0dbd5752b 100644
> --- a/drivers/staging/typec/TODO
> +++ b/drivers/staging/typec/TODO
> @@ -11,5 +11,10 @@ tcpm:
>   tcpci:
>   - Test with real hardware
>   
> +fusb302:
> +- We may want to replace the  "fcs,max-snk-mv", "fcs,max-snk-ma",
> +  "fcs,max-snk-mw" and "fcs,operating-snk-mw" device(tree) properties with
> +  properties which are part of a generic type-c controller devicetree binding.
> +
I think preferred units would be -microvolt, -,icroamp, and -microwatt.

>   Please send patches to Guenter Roeck <linux@...ck-us.net> and copy
>   Heikki Krogerus <heikki.krogerus@...ux.intel.com>.
> diff --git a/drivers/staging/typec/fusb302/fusb302.c b/drivers/staging/typec/fusb302/fusb302.c
> index 6baed06a3c0d..8ceaef8ecf17 100644
> --- a/drivers/staging/typec/fusb302/fusb302.c
> +++ b/drivers/staging/typec/fusb302/fusb302.c
> @@ -90,6 +90,7 @@ struct fusb302_chip {
>   	struct i2c_client *i2c_client;
>   	struct tcpm_port *tcpm_port;
>   	struct tcpc_dev tcpc_dev;
> +	struct tcpc_config tcpc_config;
>   
>   	struct regulator *vbus;
>   
> @@ -1198,7 +1199,6 @@ static const struct tcpc_config fusb302_tcpc_config = {
>   
>   static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev)
>   {
> -	fusb302_tcpc_dev->config = &fusb302_tcpc_config;
>   	fusb302_tcpc_dev->init = tcpm_init;
>   	fusb302_tcpc_dev->get_vbus = tcpm_get_vbus;
>   	fusb302_tcpc_dev->set_cc = tcpm_set_cc;
> @@ -1684,7 +1684,9 @@ static int fusb302_probe(struct i2c_client *client,
>   {
>   	struct fusb302_chip *chip;
>   	struct i2c_adapter *adapter;
> +	struct device *dev = &client->dev;
>   	int ret = 0;
> +	u32 val;
>   
>   	adapter = to_i2c_adapter(client->dev.parent);
>   	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) {
> @@ -1699,8 +1701,22 @@ static int fusb302_probe(struct i2c_client *client,
>   	chip->i2c_client = client;
>   	i2c_set_clientdata(client, chip);
>   	chip->dev = &client->dev;
> +	chip->tcpc_config = fusb302_tcpc_config;
> +	chip->tcpc_dev.config = &chip->tcpc_config;
>   	mutex_init(&chip->lock);
>   
> +	if (device_property_read_u32(dev, "fcs,max-snk-mv", &val) == 0)
> +		chip->tcpc_config.max_snk_mv = val;
> +
> +	if (device_property_read_u32(dev, "fcs,max-snk-ma", &val) == 0)
> +		chip->tcpc_config.max_snk_ma = val;
> +
> +	if (device_property_read_u32(dev, "fcs,max-snk-mw", &val) == 0)
> +		chip->tcpc_config.max_snk_mw = val;
> +
> +	if (device_property_read_u32(dev, "fcs,operating-snk-mw", &val) == 0)
> +		chip->tcpc_config.operating_snk_mw = val;
> +
>   	ret = fusb302_debugfs_init(chip);
>   	if (ret < 0)
>   		return ret;
>