From: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> To: <linux-i2c@vger.kernel.org>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org> Cc: <wsa@kernel.org>, <robh+dt@kernel.org>, <ludovic.desroches@microchip.com>, <nicolas.ferre@microchip.com>, <alexandre.belloni@bootlin.com>, <linux@armlinux.org.uk>, <kamel.bouhara@bootlin.com>, Codrin Ciubotariu <codrin.ciubotariu@microchip.com> Subject: [PATCH 4/4] i2c: at91: Move to generic GPIO bus recovery Date: Tue, 4 Aug 2020 12:59:26 +0300 [thread overview] Message-ID: <20200804095926.205643-5-codrin.ciubotariu@microchip.com> (raw) In-Reply-To: <20200804095926.205643-1-codrin.ciubotariu@microchip.com> Make the Microchip at91 driver the first to use the generic GPIO bus recovery support from the I2C core and discard the driver implementation. Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> --- Changes from RFC: - none; drivers/i2c/busses/i2c-at91-master.c | 69 ++-------------------------- drivers/i2c/busses/i2c-at91.h | 3 -- 2 files changed, 3 insertions(+), 69 deletions(-) diff --git a/drivers/i2c/busses/i2c-at91-master.c b/drivers/i2c/busses/i2c-at91-master.c index 363d540a8345..66864f9cf7ac 100644 --- a/drivers/i2c/busses/i2c-at91-master.c +++ b/drivers/i2c/busses/i2c-at91-master.c @@ -816,79 +816,16 @@ static int at91_twi_configure_dma(struct at91_twi_dev *dev, u32 phy_addr) return ret; } -static void at91_prepare_twi_recovery(struct i2c_adapter *adap) -{ - struct at91_twi_dev *dev = i2c_get_adapdata(adap); - - pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_gpio); -} - -static void at91_unprepare_twi_recovery(struct i2c_adapter *adap) -{ - struct at91_twi_dev *dev = i2c_get_adapdata(adap); - - pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_default); -} - static int at91_init_twi_recovery_gpio(struct platform_device *pdev, struct at91_twi_dev *dev) { struct i2c_bus_recovery_info *rinfo = &dev->rinfo; - dev->pinctrl = devm_pinctrl_get(&pdev->dev); - if (!dev->pinctrl || IS_ERR(dev->pinctrl)) { + rinfo->pinctrl = devm_pinctrl_get(&pdev->dev); + if (!rinfo->pinctrl || IS_ERR(rinfo->pinctrl)) { dev_info(dev->dev, "can't get pinctrl, bus recovery not supported\n"); - return PTR_ERR(dev->pinctrl); + return PTR_ERR(rinfo->pinctrl); } - - dev->pinctrl_pins_default = pinctrl_lookup_state(dev->pinctrl, - PINCTRL_STATE_DEFAULT); - dev->pinctrl_pins_gpio = pinctrl_lookup_state(dev->pinctrl, - "gpio"); - if (IS_ERR(dev->pinctrl_pins_default) || - IS_ERR(dev->pinctrl_pins_gpio)) { - dev_info(&pdev->dev, "pinctrl states incomplete for recovery\n"); - return -EINVAL; - } - - /* - * pins will be taken as GPIO, so we might as well inform pinctrl about - * this and move the state to GPIO - */ - pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_gpio); - - rinfo->sda_gpiod = devm_gpiod_get(&pdev->dev, "sda", GPIOD_IN); - if (PTR_ERR(rinfo->sda_gpiod) == -EPROBE_DEFER) - return -EPROBE_DEFER; - - rinfo->scl_gpiod = devm_gpiod_get(&pdev->dev, "scl", - GPIOD_OUT_HIGH_OPEN_DRAIN); - if (PTR_ERR(rinfo->scl_gpiod) == -EPROBE_DEFER) - return -EPROBE_DEFER; - - if (IS_ERR(rinfo->sda_gpiod) || - IS_ERR(rinfo->scl_gpiod)) { - dev_info(&pdev->dev, "recovery information incomplete\n"); - if (!IS_ERR(rinfo->sda_gpiod)) { - gpiod_put(rinfo->sda_gpiod); - rinfo->sda_gpiod = NULL; - } - if (!IS_ERR(rinfo->scl_gpiod)) { - gpiod_put(rinfo->scl_gpiod); - rinfo->scl_gpiod = NULL; - } - pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_default); - return -EINVAL; - } - - /* change the state of the pins back to their default state */ - pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_default); - - dev_info(&pdev->dev, "using scl, sda for recovery\n"); - - rinfo->prepare_recovery = at91_prepare_twi_recovery; - rinfo->unprepare_recovery = at91_unprepare_twi_recovery; - rinfo->recover_bus = i2c_generic_scl_recovery; dev->adapter.bus_recovery_info = rinfo; return 0; diff --git a/drivers/i2c/busses/i2c-at91.h b/drivers/i2c/busses/i2c-at91.h index 7e7b4955ca7f..eae673ae786c 100644 --- a/drivers/i2c/busses/i2c-at91.h +++ b/drivers/i2c/busses/i2c-at91.h @@ -157,9 +157,6 @@ struct at91_twi_dev { struct at91_twi_dma dma; bool slave_detected; struct i2c_bus_recovery_info rinfo; - struct pinctrl *pinctrl; - struct pinctrl_state *pinctrl_pins_default; - struct pinctrl_state *pinctrl_pins_gpio; #ifdef CONFIG_I2C_AT91_SLAVE_EXPERIMENTAL unsigned smr; struct i2c_client *slave; -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> To: <linux-i2c@vger.kernel.org>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org> Cc: kamel.bouhara@bootlin.com, alexandre.belloni@bootlin.com, linux@armlinux.org.uk, wsa@kernel.org, ludovic.desroches@microchip.com, robh+dt@kernel.org, Codrin Ciubotariu <codrin.ciubotariu@microchip.com> Subject: [PATCH 4/4] i2c: at91: Move to generic GPIO bus recovery Date: Tue, 4 Aug 2020 12:59:26 +0300 [thread overview] Message-ID: <20200804095926.205643-5-codrin.ciubotariu@microchip.com> (raw) In-Reply-To: <20200804095926.205643-1-codrin.ciubotariu@microchip.com> Make the Microchip at91 driver the first to use the generic GPIO bus recovery support from the I2C core and discard the driver implementation. Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> --- Changes from RFC: - none; drivers/i2c/busses/i2c-at91-master.c | 69 ++-------------------------- drivers/i2c/busses/i2c-at91.h | 3 -- 2 files changed, 3 insertions(+), 69 deletions(-) diff --git a/drivers/i2c/busses/i2c-at91-master.c b/drivers/i2c/busses/i2c-at91-master.c index 363d540a8345..66864f9cf7ac 100644 --- a/drivers/i2c/busses/i2c-at91-master.c +++ b/drivers/i2c/busses/i2c-at91-master.c @@ -816,79 +816,16 @@ static int at91_twi_configure_dma(struct at91_twi_dev *dev, u32 phy_addr) return ret; } -static void at91_prepare_twi_recovery(struct i2c_adapter *adap) -{ - struct at91_twi_dev *dev = i2c_get_adapdata(adap); - - pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_gpio); -} - -static void at91_unprepare_twi_recovery(struct i2c_adapter *adap) -{ - struct at91_twi_dev *dev = i2c_get_adapdata(adap); - - pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_default); -} - static int at91_init_twi_recovery_gpio(struct platform_device *pdev, struct at91_twi_dev *dev) { struct i2c_bus_recovery_info *rinfo = &dev->rinfo; - dev->pinctrl = devm_pinctrl_get(&pdev->dev); - if (!dev->pinctrl || IS_ERR(dev->pinctrl)) { + rinfo->pinctrl = devm_pinctrl_get(&pdev->dev); + if (!rinfo->pinctrl || IS_ERR(rinfo->pinctrl)) { dev_info(dev->dev, "can't get pinctrl, bus recovery not supported\n"); - return PTR_ERR(dev->pinctrl); + return PTR_ERR(rinfo->pinctrl); } - - dev->pinctrl_pins_default = pinctrl_lookup_state(dev->pinctrl, - PINCTRL_STATE_DEFAULT); - dev->pinctrl_pins_gpio = pinctrl_lookup_state(dev->pinctrl, - "gpio"); - if (IS_ERR(dev->pinctrl_pins_default) || - IS_ERR(dev->pinctrl_pins_gpio)) { - dev_info(&pdev->dev, "pinctrl states incomplete for recovery\n"); - return -EINVAL; - } - - /* - * pins will be taken as GPIO, so we might as well inform pinctrl about - * this and move the state to GPIO - */ - pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_gpio); - - rinfo->sda_gpiod = devm_gpiod_get(&pdev->dev, "sda", GPIOD_IN); - if (PTR_ERR(rinfo->sda_gpiod) == -EPROBE_DEFER) - return -EPROBE_DEFER; - - rinfo->scl_gpiod = devm_gpiod_get(&pdev->dev, "scl", - GPIOD_OUT_HIGH_OPEN_DRAIN); - if (PTR_ERR(rinfo->scl_gpiod) == -EPROBE_DEFER) - return -EPROBE_DEFER; - - if (IS_ERR(rinfo->sda_gpiod) || - IS_ERR(rinfo->scl_gpiod)) { - dev_info(&pdev->dev, "recovery information incomplete\n"); - if (!IS_ERR(rinfo->sda_gpiod)) { - gpiod_put(rinfo->sda_gpiod); - rinfo->sda_gpiod = NULL; - } - if (!IS_ERR(rinfo->scl_gpiod)) { - gpiod_put(rinfo->scl_gpiod); - rinfo->scl_gpiod = NULL; - } - pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_default); - return -EINVAL; - } - - /* change the state of the pins back to their default state */ - pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_default); - - dev_info(&pdev->dev, "using scl, sda for recovery\n"); - - rinfo->prepare_recovery = at91_prepare_twi_recovery; - rinfo->unprepare_recovery = at91_unprepare_twi_recovery; - rinfo->recover_bus = i2c_generic_scl_recovery; dev->adapter.bus_recovery_info = rinfo; return 0; diff --git a/drivers/i2c/busses/i2c-at91.h b/drivers/i2c/busses/i2c-at91.h index 7e7b4955ca7f..eae673ae786c 100644 --- a/drivers/i2c/busses/i2c-at91.h +++ b/drivers/i2c/busses/i2c-at91.h @@ -157,9 +157,6 @@ struct at91_twi_dev { struct at91_twi_dma dma; bool slave_detected; struct i2c_bus_recovery_info rinfo; - struct pinctrl *pinctrl; - struct pinctrl_state *pinctrl_pins_default; - struct pinctrl_state *pinctrl_pins_gpio; #ifdef CONFIG_I2C_AT91_SLAVE_EXPERIMENTAL unsigned smr; struct i2c_client *slave; -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-08-04 10:02 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-08-04 9:59 [PATCH 0/4] i2c: core: add generic GPIO bus recovery Codrin Ciubotariu 2020-08-04 9:59 ` Codrin Ciubotariu 2020-08-04 9:59 ` [PATCH 1/4] dt-binding: i2c: add generic properties for " Codrin Ciubotariu 2020-08-04 9:59 ` Codrin Ciubotariu 2020-08-05 8:28 ` wsa 2020-08-05 8:28 ` wsa 2020-08-04 9:59 ` [PATCH 2/4] i2c: core: add generic I2C GPIO recovery Codrin Ciubotariu 2020-08-04 9:59 ` Codrin Ciubotariu 2020-08-05 8:36 ` wsa 2020-08-05 8:36 ` wsa 2020-08-04 9:59 ` [PATCH 3/4] i2c: core: treat EPROBE_DEFER when acquiring SCL/SDA GPIOs Codrin Ciubotariu 2020-08-04 9:59 ` Codrin Ciubotariu 2020-08-05 8:40 ` wsa 2020-08-05 8:40 ` wsa 2020-08-04 9:59 ` Codrin Ciubotariu [this message] 2020-08-04 9:59 ` [PATCH 4/4] i2c: at91: Move to generic GPIO bus recovery Codrin Ciubotariu 2020-08-05 8:41 ` wsa 2020-08-05 8:41 ` wsa 2020-08-05 8:52 ` [PATCH 0/4] i2c: core: add " wsa 2020-08-05 8:52 ` wsa 2020-08-05 10:29 ` Codrin.Ciubotariu 2020-08-05 10:29 ` Codrin.Ciubotariu 2020-08-05 11:17 ` wsa 2020-08-05 11:17 ` wsa
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