linux-kernel - RE: [v2] ACPI: support for NXP i2c controller

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Date:   Wed, 11 Sep 2019 06:25:47 +0000
From:   Biwen Li <biwen.li@....com>
To:     Biwen Li <biwen.li@....com>,
        "andy.shevchenko@...il.com" <andy.shevchenko@...il.com>,
        "rafael@...nel.org" <rafael@...nel.org>,
        Leo Li <leoyang.li@....com>,
        Meenakshi Aggarwal <meenakshi.aggarwal@....com>,
        Udit Kumar <udit.kumar@....com>,
        "wsa@...-dreams.de" <wsa@...-dreams.de>,
        "rjw@...ysocki.net" <rjw@...ysocki.net>
CC:     Chuanhua Han <chuanhua.han@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [v2] ACPI: support for NXP i2c controller

Hi rafael, wolfram
	Any comments about this?
> 
> 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>
> Signed-off-by: Biwen Li <biwen.li@....com>
> ---
> Change in v2:
> 	- Simplify code
> 	- Adjust header file order
> 	- Not use ACPI_PTR()
> 
>  drivers/acpi/acpi_apd.c      |  7 +++++++
>  drivers/i2c/busses/i2c-imx.c | 17 +++++++++++++----
>  2 files changed, 20 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c index
> 7cd0c9ac71ea..71511ae2dfcd 100644
> --- a/drivers/acpi/acpi_apd.c
> +++ b/drivers/acpi/acpi_apd.c
> @@ -160,11 +160,17 @@ static const struct apd_device_desc hip08_i2c_desc
> = {
>  	.setup = acpi_apd_setup,
>  	.fixed_clk_rate = 250000000,
>  };
> +
>  static const struct apd_device_desc thunderx2_i2c_desc = {
>  	.setup = acpi_apd_setup,
>  	.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 +244,7 @@ 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
> 15f6cde6452f..a3b61336fe55 100644
> --- a/drivers/i2c/busses/i2c-imx.c
> +++ b/drivers/i2c/busses/i2c-imx.c
> @@ -20,6 +20,7 @@
>   *
>   */
> 
> +#include <linux/acpi.h>
>  #include <linux/clk.h>
>  #include <linux/completion.h>
>  #include <linux/delay.h>
> @@ -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; @@ -1048,14 +1055,13
> @@ static const struct i2c_algorithm i2c_imx_algo = {
> 
>  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);
>  	struct imx_i2c_struct *i2c_imx;
>  	struct resource *res;
>  	struct imxi2c_platform_data *pdata = dev_get_platdata(&pdev->dev);
>  	void __iomem *base;
>  	int irq, ret;
>  	dma_addr_t phy_addr;
> +	const struct imx_i2c_hwdata *match;
> 
>  	dev_dbg(&pdev->dev, "<%s>\n", __func__);
> 
> @@ -1075,8 +1081,9 @@ static int i2c_imx_probe(struct platform_device
> *pdev)
>  	if (!i2c_imx)
>  		return -ENOMEM;
> 
> -	if (of_id)
> -		i2c_imx->hwdata = of_id->data;
> +	match = device_get_match_data(&pdev->dev);
> +	if (match)
> +		i2c_imx->hwdata = match;
>  	else
>  		i2c_imx->hwdata = (struct imx_i2c_hwdata *)
>  				platform_get_device_id(pdev)->driver_data;
> @@ -1089,6 +1096,7 @@ 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); @@ -1247,6 +1255,7
> @@ 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 = i2c_imx_acpi_ids,
>  	},
>  	.id_table = imx_i2c_devtype,
>  };
> --
> 2.17.1