Hello,
On Fri, Sep 11, 2015 at 06:42:34PM +0800, Gao Pan wrote:
> V5:
> -introduce a dedicated gpio state for bus recovery.
> -assign adapter.bus_recovery_info after the two gpios were aquired
> successfully.
You also do this if the gpios were not acquired successfully.
> + if (IS_ERR(i2c_imx->pinctrl_pins_default))
> + dev_warn(&pdev->dev, "could not get default state\n");
> + else {
> + i2c_imx->pinctrl_pins_gpio =
> pinctrl_lookup_state(i2c_imx->pinctrl,
> + I2C_PINCTRL_STATE_GPIO);
> + if (IS_ERR(i2c_imx->pinctrl_pins_gpio))
> + dev_warn(&pdev->dev, "could not get gpio state\n");
IMHO pinctrl_lookup_state returning an error is enough to not try a
recovery.
> + }
> +
> /* Request IRQ */
> ret = devm_request_irq(&pdev->dev, irq, i2c_imx_isr, 0,
> pdev->name, i2c_imx);
> @@ -1057,6 +1146,24 @@ static int i2c_imx_probe(struct platform_device *pdev)
> if (ret < 0)
> goto rpm_disable;
>
> + /* Init recover pins */
> + i2c_imx->pins.sda =
> + devm_gpiod_get_optional(&pdev->dev, "sda-gpios", GPIOD_IN);
> + i2c_imx->pins.scl =
> + devm_gpiod_get_optional(&pdev->dev, "scl-gpios", GPIOD_IN);
> +
> + if (IS_ERR(i2c_imx->pins.sda)) {
> + ret = PTR_ERR(i2c_imx->pins.sda);
> + goto clk_disable;
> + }
> +
> + if (IS_ERR(i2c_imx->pins.scl)) {
> + ret = PTR_ERR(i2c_imx->pins.scl);
> + goto clk_disable;
> + }
> +
if (i2c_imx->pins.sda && i2c_imx->pins.scl)
> + i2c_imx->adapter.bus_recovery_info = &i2c_imx_bus_recovery_info;
> +
> /* Set up clock divider */
> i2c_imx->bitrate = IMX_I2C_BIT_RATE;
> ret = of_property_read_u32(pdev->dev.of_node,
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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