linux-kernel - Re: [PATCH] ACPI: support for NXP i2c controller

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Date:   Thu, 18 Jul 2019 10:45:10 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Chuanhua Han <chuanhua.han@....com>
Cc:     lenb@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        leoyang.li@....com,
        Meenakshi Aggarwal <meenakshi.aggarwal@....com>,
        Udit Kumar <udit.kumar@....com>
Subject: Re: [PATCH] ACPI: support for NXP i2c controller

On Thursday, July 11, 2019 12:26:01 PM CEST Chuanhua Han wrote:
> Enable NXP i2c controller to boot with ACPI
> 
> Signed-off-by: Meenakshi Aggarwal <meenakshi.aggarwal@....com>
> Signed-off-by: Udit Kumar <udit.kumar@....com>
> Signed-off-by: Chuanhua Han <chuanhua.han@....com>

In case you want this to go in through the i2c tree:

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

or in case you want me to take it, please let me know, but I will need an ACK
from the i2c side then.

> ---
>  drivers/acpi/acpi_apd.c      |  6 ++++++
>  drivers/i2c/busses/i2c-imx.c | 15 +++++++++++++++
>  2 files changed, 21 insertions(+)
> 
> diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c
> index ff47317..cf8566c 100644
> --- a/drivers/acpi/acpi_apd.c
> +++ b/drivers/acpi/acpi_apd.c
> @@ -165,6 +165,11 @@ static const struct apd_device_desc thunderx2_i2c_desc = {
>  	.fixed_clk_rate = 125000000,
>  };
>  
> +static const struct apd_device_desc nxp_i2c_desc = {
> +	.setup = acpi_apd_setup,
> +	.fixed_clk_rate = 350000000,
> +};
> +
>  static const struct apd_device_desc hip08_spi_desc = {
>  	.setup = acpi_apd_setup,
>  	.fixed_clk_rate = 250000000,
> @@ -238,6 +243,7 @@ static const struct acpi_device_id acpi_apd_device_ids[] = {
>  	{ "HISI02A1", APD_ADDR(hip07_i2c_desc) },
>  	{ "HISI02A2", APD_ADDR(hip08_i2c_desc) },
>  	{ "HISI0173", APD_ADDR(hip08_spi_desc) },
> +	{ "NXP0001", APD_ADDR(nxp_i2c_desc) },
>  #endif
>  	{ }
>  };
> diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
> index b1b8b93..99f9b96 100644
> --- a/drivers/i2c/busses/i2c-imx.c
> +++ b/drivers/i2c/busses/i2c-imx.c
> @@ -44,6 +44,7 @@
>  #include <linux/pm_runtime.h>
>  #include <linux/sched.h>
>  #include <linux/slab.h>
> +#include <linux/acpi.h>
>  
>  /* This will be the driver name the kernel reports */
>  #define DRIVER_NAME "imx-i2c"
> @@ -255,6 +256,12 @@ static const struct of_device_id i2c_imx_dt_ids[] = {
>  };
>  MODULE_DEVICE_TABLE(of, i2c_imx_dt_ids);
>  
> +static const struct acpi_device_id i2c_imx_acpi_ids[] = {
> +	{"NXP0001", .driver_data = (kernel_ulong_t)&vf610_i2c_hwdata},
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(acpi, i2c_imx_acpi_ids);
> +
>  static inline int is_imx1_i2c(struct imx_i2c_struct *i2c_imx)
>  {
>  	return i2c_imx->hwdata->devtype == IMX1_I2C;
> @@ -1052,6 +1059,9 @@ static int i2c_imx_probe(struct platform_device *pdev)
>  {
>  	const struct of_device_id *of_id = of_match_device(i2c_imx_dt_ids,
>  							   &pdev->dev);
> +	const struct acpi_device_id *acpi_id =
> +			acpi_match_device(i2c_imx_acpi_ids,
> +					  &pdev->dev);
>  	struct imx_i2c_struct *i2c_imx;
>  	struct resource *res;
>  	struct imxi2c_platform_data *pdata = dev_get_platdata(&pdev->dev);
> @@ -1079,6 +1089,9 @@ static int i2c_imx_probe(struct platform_device *pdev)
>  
>  	if (of_id)
>  		i2c_imx->hwdata = of_id->data;
> +	else if (acpi_id)
> +		i2c_imx->hwdata = (struct imx_i2c_hwdata *)
> +				acpi_id->driver_data;
>  	else
>  		i2c_imx->hwdata = (struct imx_i2c_hwdata *)
>  				platform_get_device_id(pdev)->driver_data;
> @@ -1091,6 +1104,7 @@ static int i2c_imx_probe(struct platform_device *pdev)
>  	i2c_imx->adapter.nr		= pdev->id;
>  	i2c_imx->adapter.dev.of_node	= pdev->dev.of_node;
>  	i2c_imx->base			= base;
> +	ACPI_COMPANION_SET(&i2c_imx->adapter.dev, ACPI_COMPANION(&pdev->dev));
>  
>  	/* Get I2C clock */
>  	i2c_imx->clk = devm_clk_get(&pdev->dev, NULL);
> @@ -1253,6 +1267,7 @@ static struct platform_driver i2c_imx_driver = {
>  		.name = DRIVER_NAME,
>  		.pm = &i2c_imx_pm_ops,
>  		.of_match_table = i2c_imx_dt_ids,
> +		.acpi_match_table = ACPI_PTR(i2c_imx_acpi_ids),
>  	},
>  	.id_table = imx_i2c_devtype,
>  };
>