From: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
To: Marco Felsch <m.felsch@pengutronix.de>,
Support Opensource <Support.Opensource@diasemi.com>,
"lee.jones@linaro.org" <lee.jones@linaro.org>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"linus.walleij@linaro.org" <linus.walleij@linaro.org>
Cc: "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
"kernel@pengutronix.de" <kernel@pengutronix.de>
Subject: RE: [RESEND PATCH v3 3/3] pinctrl: da9062: add driver support
Date: Thu, 12 Dec 2019 16:48:26 +0000 [thread overview]
Message-ID: <AM5PR1001MB0994E2D72A95E4AC4796F80A80550@AM5PR1001MB0994.EURPRD10.PROD.OUTLOOK.COM> (raw)
In-Reply-To: <20191212160413.15232-4-m.felsch@pengutronix.de>
On 12 December 2019 16:04, Marco Felsch wrote:
> +static int da9062_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
> + unsigned long config)
> +{
> + struct da9062_pctl *pctl = gpiochip_get_data(gc);
> + struct regmap *regmap = pctl->da9062->regmap;
> + int gpio_mode;
> +
> + /*
> + * We need to meet the following restrictions [1, Figure 18]:
> + * - PIN_CONFIG_BIAS_PULL_DOWN -> only allowed if the pin is used as
> + * gpio input
> + * - PIN_CONFIG_BIAS_PULL_UP -> only allowed if the pin is used as
> + * gpio output open-drain.
> + */
> +
> + switch (pinconf_to_config_param(config)) {
> + case PIN_CONFIG_BIAS_PULL_DOWN:
> + gpio_mode = da9062_pctl_get_pin_mode(pctl, offset);
> + if (gpio_mode < 0)
> + return -EINVAL;
> + else if (gpio_mode != DA9062_PIN_GPI)
> + return -ENOTSUPP;
> + return regmap_update_bits(regmap, DA9062AA_CONFIG_K,
> + BIT(offset), BIT(offset));
> + case PIN_CONFIG_BIAS_PULL_UP:
> + gpio_mode = da9062_pctl_get_pin_mode(pctl, offset);
> + if (gpio_mode < 0)
> + return -EINVAL;
> + else if (gpio_mode != DA9062_PIN_GPO_OD)
> + return -ENOTSUPP;
> + return regmap_update_bits(regmap, DA9062AA_CONFIG_K,
> + BIT(offset), BIT(offset));
Apologies for the delay on reviewing. Just looking at the datasheet, how do we
disable PULL_DOWN (for input) and PULL_UP (for output)? Should we not have a
'PIN_CONFIG_BIAS_DISABLE' case here to handle this?
> + case PIN_CONFIG_DRIVE_OPEN_DRAIN:
> + return da9062_pctl_set_pin_mode(pctl, offset,
> + DA9062_PIN_GPO_OD);
> + case PIN_CONFIG_DRIVE_PUSH_PULL:
> + return da9062_pctl_set_pin_mode(pctl, offset,
> + DA9062_PIN_GPO_PP);
> + default:
> + return -ENOTSUPP;
> + }
> +}
next prev parent reply other threads:[~2019-12-12 16:48 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-12 16:04 [RESEND PATCH v3 0/3] Add DA9062 GPIO support Marco Felsch
2019-12-12 16:04 ` [RESEND PATCH v3 1/3] dt-bindings: mfd: da9062: add gpio bindings Marco Felsch
2019-12-12 16:45 ` Adam Thomson
2019-12-13 10:38 ` Lee Jones
2019-12-18 21:54 ` Rob Herring
2019-12-12 16:04 ` [RESEND PATCH v3 2/3] mfd: da9062: add support for the DA9062 GPIOs in the core Marco Felsch
2019-12-12 16:45 ` Adam Thomson
2019-12-13 10:37 ` Lee Jones
2019-12-12 16:04 ` [RESEND PATCH v3 3/3] pinctrl: da9062: add driver support Marco Felsch
2019-12-12 16:48 ` Adam Thomson [this message]
2019-12-16 7:47 ` Marco Felsch
2019-12-16 10:33 ` Linus Walleij
2019-12-17 6:40 ` Marco Felsch
2019-12-17 9:55 ` Adam Thomson
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