RE: [EXT] Re: [PATCH] ACPI: support for NXP i2c controller

[Chuanhua Han <chuanhua.han@nxp.com>]

Hi, Rafael J. Wysocki

> -----Original Message-----
> From: Rafael J. Wysocki <rjw@rjwysocki.net>
> Sent: 2019年7月18日 16:45
> To: Chuanhua Han <chuanhua.han@nxp.com>
> Cc: lenb@kernel.org; shawnguo@kernel.org; s.hauer@pengutronix.de;
> linux-acpi@vger.kernel.org; linux-kernel@vger.kernel.org;
> linux-i2c@vger.kernel.org; linux-arm-kernel@lists.infradead.org; Leo Li
> <leoyang.li@nxp.com>; Meenakshi Aggarwal <meenakshi.aggarwal@nxp.com>;
> Udit Kumar <udit.kumar@nxp.com>
> Subject: [EXT] Re: [PATCH] ACPI: support for NXP i2c controller
> 
> Caution: EXT Email
> 
> 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@nxp.com>
> > Signed-off-by: Udit Kumar <udit.kumar@nxp.com>
> > Signed-off-by: Chuanhua Han <chuanhua.han@nxp.com>
> 
> In case you want this to go in through the i2c tree:
> 
> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.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.
I'm sorry, I don't quite understand
> 
> > ---
> >  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,
> >  };
> >
> 
> 
> 

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