Re: [PATCH v3 1/8] i2c: i2c-qcom-geni: Provide support for ACPI

Ard Biesheuvel
2019-06-10T08:44:19Z

On Mon, 10 Jun 2019 at 10:42, Lee Jones <lee.jones@linaro.org> wrote:
>
> Add a match table to allow automatic probing of ACPI device
> QCOM0220. Ignore clock attainment errors. Set default clock
> frequency value.
>
> Signed-off-by: Lee Jones <lee.jones@linaro.org>

Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

> ---
> drivers/i2c/busses/i2c-qcom-geni.c | 15 ++++++++++++++-
> 1 file changed, 14 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
> index db075bc0d952..9e3b8a98688d 100644
> --- a/drivers/i2c/busses/i2c-qcom-geni.c
> +++ b/drivers/i2c/busses/i2c-qcom-geni.c
> @@ -1,6 +1,7 @@
> // SPDX-License-Identifier: GPL-2.0
> // Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
>
> +#include <linux/acpi.h>
> #include <linux/clk.h>
> #include <linux/dma-mapping.h>
> #include <linux/err.h>
> @@ -483,6 +484,14 @@ static const struct i2c_algorithm geni_i2c_algo = {
> .functionality = geni_i2c_func,
> };
>
> +#ifdef CONFIG_ACPI
> +static const struct acpi_device_id geni_i2c_acpi_match[] = {
> + { "QCOM0220"},
> + { },
> +};
> +MODULE_DEVICE_TABLE(acpi, geni_i2c_acpi_match);
> +#endif
> +
> static int geni_i2c_probe(struct platform_device *pdev)
> {
> struct geni_i2c_dev *gi2c;
> @@ -502,7 +511,7 @@ static int geni_i2c_probe(struct platform_device *pdev)
> return PTR_ERR(gi2c->se.base);
>
> gi2c->se.clk = devm_clk_get(&pdev->dev, "se");
> - if (IS_ERR(gi2c->se.clk)) {
> + if (IS_ERR(gi2c->se.clk) && !has_acpi_companion(&pdev->dev)) {
> ret = PTR_ERR(gi2c->se.clk);
> dev_err(&pdev->dev, "Err getting SE Core clk %d\n", ret);
> return ret;
> @@ -516,6 +525,9 @@ static int geni_i2c_probe(struct platform_device *pdev)
> gi2c->clk_freq_out = KHZ(100);
> }
>
> + if (has_acpi_companion(&pdev->dev))
> + ACPI_COMPANION_SET(&gi2c->adap.dev, ACPI_COMPANION(&pdev->dev));
> +
> gi2c->irq = platform_get_irq(pdev, 0);
> if (gi2c->irq < 0) {
> dev_err(&pdev->dev, "IRQ error for i2c-geni\n");
> @@ -660,6 +672,7 @@ static struct platform_driver geni_i2c_driver = {
> .name = "geni_i2c",
> .pm = &geni_i2c_pm_ops,
> .of_match_table = geni_i2c_dt_match,
> + .acpi_match_table = ACPI_PTR(geni_i2c_acpi_match),
> },
> };
>
> --
> 2.17.1
>