linux-kernel - Re: [PATCH v3 2/5] usb: typec: tcpci_rt1711h: Convert enum->pointer for data in the match tables

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Message-ID: <ZPrf07OpMD4iKVI+@kuha.fi.intel.com>
Date:   Fri, 8 Sep 2023 11:48:19 +0300
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Biju Das <biju.das.jz@...renesas.com>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Biju Das <biju.das.au@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH v3 2/5] usb: typec: tcpci_rt1711h: Convert enum->pointer
 for data in the match tables

On Wed, Sep 06, 2023 at 09:06:16AM +0100, Biju Das wrote:
> Currently did varaible is used for HW differences between the devices which
> complicates the code by adding checks.
> 
> Therefore it is better to convert enum->pointer for data match and extend
> match support for both ID and OF tables by using i2c_get_match_data().
> 
> Add struct rt1711h_chip_info with did variable and replace did->info in
> struct rt1711h_chip. Later patch will add more hw differences to
> struct rt1711h_chip_info and avoid checking did for HW differences.
> 
> Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>

> ---
> v2->v3:
>  * Added Rb tag from Andy.
> v1->v2:
>  * Updated commit description.
> ---
>  drivers/usb/typec/tcpm/tcpci_rt1711h.c | 30 ++++++++++++++++++--------
>  1 file changed, 21 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpci_rt1711h.c b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
> index 6146bca8e55f..2b7258d3cb4e 100644
> --- a/drivers/usb/typec/tcpm/tcpci_rt1711h.c
> +++ b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
> @@ -51,13 +51,17 @@
>  /* 1b0 as fixed rx threshold of rd/rp 0.55V, 1b1 depends on RTCRTL4[0] */
>  #define BMCIO_RXDZEN	BIT(0)
>  
> +struct rt1711h_chip_info {
> +	u16 did;
> +};
> +
>  struct rt1711h_chip {
>  	struct tcpci_data data;
>  	struct tcpci *tcpci;
>  	struct device *dev;
>  	struct regulator *vbus;
> +	const struct rt1711h_chip_info *info;
>  	bool src_en;
> -	u16 did;
>  };
>  
>  static int rt1711h_read16(struct rt1711h_chip *chip, unsigned int reg, u16 *val)
> @@ -105,7 +109,7 @@ static int rt1711h_init(struct tcpci *tcpci, struct tcpci_data *tdata)
>  		return ret;
>  
>  	/* Enable PD30 extended message for RT1715 */
> -	if (chip->did == RT1715_DID) {
> +	if (chip->info->did == RT1715_DID) {
>  		ret = regmap_update_bits(regmap, RT1711H_RTCTRL8,
>  					 RT1711H_ENEXTMSG, RT1711H_ENEXTMSG);
>  		if (ret < 0)
> @@ -200,7 +204,7 @@ static inline int rt1711h_init_cc_params(struct rt1711h_chip *chip, u8 status)
>  	if ((cc1 >= TYPEC_CC_RP_1_5 && cc2 < TYPEC_CC_RP_DEF) ||
>  	    (cc2 >= TYPEC_CC_RP_1_5 && cc1 < TYPEC_CC_RP_DEF)) {
>  		rxdz_en = BMCIO_RXDZEN;
> -		if (chip->did == RT1715_DID)
> +		if (chip->info->did == RT1715_DID)
>  			rxdz_sel = RT1711H_BMCIO_RXDZSEL;
>  		else
>  			rxdz_sel = 0;
> @@ -319,7 +323,7 @@ static int rt1711h_check_revision(struct i2c_client *i2c, struct rt1711h_chip *c
>  	ret = i2c_smbus_read_word_data(i2c, TCPC_BCD_DEV);
>  	if (ret < 0)
>  		return ret;
> -	if (ret != chip->did) {
> +	if (ret != chip->info->did) {
>  		dev_err(&i2c->dev, "did is not correct, 0x%04x\n", ret);
>  		return -ENODEV;
>  	}
> @@ -336,7 +340,7 @@ static int rt1711h_probe(struct i2c_client *client)
>  	if (!chip)
>  		return -ENOMEM;
>  
> -	chip->did = (size_t)device_get_match_data(&client->dev);
> +	chip->info = i2c_get_match_data(client);
>  
>  	ret = rt1711h_check_revision(client, chip);
>  	if (ret < 0) {
> @@ -391,17 +395,25 @@ static void rt1711h_remove(struct i2c_client *client)
>  	tcpci_unregister_port(chip->tcpci);
>  }
>  
> +static const struct rt1711h_chip_info rt1711h = {
> +	.did = RT1711H_DID,
> +};
> +
> +static const struct rt1711h_chip_info rt1715 = {
> +	.did = RT1715_DID,
> +};
> +
>  static const struct i2c_device_id rt1711h_id[] = {
> -	{ "rt1711h", 0 },
> -	{ "rt1715", 0 },
> +	{ "rt1711h", (kernel_ulong_t)&rt1711h },
> +	{ "rt1715", (kernel_ulong_t)&rt1715 },
>  	{}
>  };
>  MODULE_DEVICE_TABLE(i2c, rt1711h_id);
>  
>  #ifdef CONFIG_OF
>  static const struct of_device_id rt1711h_of_match[] = {
> -	{ .compatible = "richtek,rt1711h", .data = (void *)RT1711H_DID },
> -	{ .compatible = "richtek,rt1715", .data = (void *)RT1715_DID },
> +	{ .compatible = "richtek,rt1711h", .data = &rt1711h },
> +	{ .compatible = "richtek,rt1715", .data = &rt1715 },
>  	{}
>  };
>  MODULE_DEVICE_TABLE(of, rt1711h_of_match);
> -- 
> 2.25.1

-- 
heikki