diff mbox

[v2,3/3] ACPI / PMIC: Add opregion driver for Intel Dollar Cove TI PMIC

Message ID 20170824081141.5018-4-tiwai@suse.de (mailing list archive)
State Changes Requested, archived
Headers show

Commit Message

Takashi Iwai Aug. 24, 2017, 8:11 a.m. UTC 
This patch adds the opregion driver for Dollar Cove TI PMIC on Intel
Cherry Trail devices.  The patch is based on the original work by
Intel, found at:
      https://github.com/01org/ProductionKernelQuilts
with many cleanups and rewrites.

The driver is currently provided only as built-in to follow other
PMIC opregion drivers convention.

The re-enumeration of devices at probe is required for fixing the
issues on HP x2 210 G2.  See bug#195689.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=193891
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=195689
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
v1->v2:
* get_raw_temp cleanup in opregion driver, mention about register
  endianess

 drivers/acpi/Kconfig                 |   6 ++
 drivers/acpi/Makefile                |   1 +
 drivers/acpi/pmic/intel_pmic_dc_ti.c | 139 +++++++++++++++++++++++++++++++++++
 3 files changed, 146 insertions(+)
 create mode 100644 drivers/acpi/pmic/intel_pmic_dc_ti.c

Comments

Mika Westerberg Aug. 24, 2017, 9:14 a.m. UTC | #1 
On Thu, Aug 24, 2017 at 10:11:41AM +0200, Takashi Iwai wrote:
> This patch adds the opregion driver for Dollar Cove TI PMIC on Intel
> Cherry Trail devices.  The patch is based on the original work by
> Intel, found at:
>       https://github.com/01org/ProductionKernelQuilts
> with many cleanups and rewrites.
> 
> The driver is currently provided only as built-in to follow other
> PMIC opregion drivers convention.
> 
> The re-enumeration of devices at probe is required for fixing the
> issues on HP x2 210 G2.  See bug#195689.
> 
> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=193891
> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=195689
> Signed-off-by: Takashi Iwai <tiwai@suse.de>
> ---
> v1->v2:
> * get_raw_temp cleanup in opregion driver, mention about register
>   endianess
> 
>  drivers/acpi/Kconfig                 |   6 ++
>  drivers/acpi/Makefile                |   1 +
>  drivers/acpi/pmic/intel_pmic_dc_ti.c | 139 +++++++++++++++++++++++++++++++++++
>  3 files changed, 146 insertions(+)
>  create mode 100644 drivers/acpi/pmic/intel_pmic_dc_ti.c
> 
> diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
> index 1ce52f84dc23..9da8dcefde7b 100644
> --- a/drivers/acpi/Kconfig
> +++ b/drivers/acpi/Kconfig
> @@ -521,6 +521,12 @@ config CHT_WC_PMIC_OPREGION
>  	help
>  	  This config adds ACPI operation region support for CHT Whiskey Cove PMIC.
>  
> +config DC_TI_PMIC_OPREGION
> +	bool "ACPI operation region support for Dollar Cove TI PMIC"
> +	depends on INTEL_SOC_PMIC_DC_TI
> +	help
> +	  This config adds ACPI operation region support for Dollar Cove TI PMIC.
> +
>  endif
>  
>  config ACPI_CONFIGFS
> diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
> index b1aacfc62b1f..0a9008b971af 100644
> --- a/drivers/acpi/Makefile
> +++ b/drivers/acpi/Makefile
> @@ -103,6 +103,7 @@ obj-$(CONFIG_CRC_PMIC_OPREGION) += pmic/intel_pmic_crc.o
>  obj-$(CONFIG_XPOWER_PMIC_OPREGION) += pmic/intel_pmic_xpower.o
>  obj-$(CONFIG_BXT_WC_PMIC_OPREGION) += pmic/intel_pmic_bxtwc.o
>  obj-$(CONFIG_CHT_WC_PMIC_OPREGION) += pmic/intel_pmic_chtwc.o
> +obj-$(CONFIG_DC_TI_PMIC_OPREGION) += pmic/intel_pmic_dc_ti.o
>  
>  obj-$(CONFIG_ACPI_CONFIGFS)	+= acpi_configfs.o
>  
> diff --git a/drivers/acpi/pmic/intel_pmic_dc_ti.c b/drivers/acpi/pmic/intel_pmic_dc_ti.c
> new file mode 100644
> index 000000000000..a2be1270eeeb
> --- /dev/null
> +++ b/drivers/acpi/pmic/intel_pmic_dc_ti.c
> @@ -0,0 +1,139 @@
> +/*
> + * Dollar Cove TI PMIC operation region driver
> + * Copyright (C) 2014 Intel Corporation. All rights reserved.
> + *
> + * Rewritten and cleaned up
> + * Copyright (C) 2017 Takashi Iwai <tiwai@suse.de>
> + */
> +
> +#include <linux/acpi.h>
> +#include <linux/init.h>
> +#include <linux/mfd/intel_soc_pmic.h>
> +#include <linux/platform_device.h>
> +#include "intel_pmic.h"
> +
> +/* registers stored in 16bit BE (high:low, total 10bit) */
> +#define DC_TI_VBAT	0x54
> +#define DC_TI_DIETEMP	0x56
> +#define DC_TI_BPTHERM	0x58
> +#define DC_TI_GPADC	0x5a
> +
> +static struct pmic_table dc_ti_power_table[] = {

const?

> +	{ .address = 0x00, .reg = 0x41 },
> +	{ .address = 0x04, .reg = 0x42 },
> +	{ .address = 0x08, .reg = 0x43 },
> +	{ .address = 0x0c, .reg = 0x45 },
> +	{ .address = 0x10, .reg = 0x46 },
> +	{ .address = 0x14, .reg = 0x47 },
> +	{ .address = 0x18, .reg = 0x48 },
> +	{ .address = 0x1c, .reg = 0x49 },
> +	{ .address = 0x20, .reg = 0x4a },
> +	{ .address = 0x24, .reg = 0x4b },
> +	{ .address = 0x28, .reg = 0x4c },
> +	{ .address = 0x2c, .reg = 0x4d },
> +	{ .address = 0x30, .reg = 0x4e },
> +};
> +
> +static struct pmic_table dc_ti_thermal_table[] = {

const?

> +	{
> +		.address = 0x00,
> +		.reg = DC_TI_GPADC
> +	},
> +	{
> +		.address = 0x0c,
> +		.reg = DC_TI_GPADC
> +	},
> +	/* TMP2 -> SYSTEMP */
> +	{
> +		.address = 0x18,
> +		.reg = DC_TI_GPADC
> +	},
> +	/* TMP3 -> BPTHERM */
> +	{
> +		.address = 0x24,
> +		.reg = DC_TI_BPTHERM
> +	},
> +	{
> +		.address = 0x30,
> +		.reg = DC_TI_GPADC
> +	},
> +	/* TMP5 -> DIETEMP */
> +	{
> +		.address = 0x3c,
> +		.reg = DC_TI_DIETEMP
> +	},
> +};
> +
> +static int dc_ti_pmic_get_power(struct regmap *regmap, int reg, int bit,
> +				u64 *value)
> +{
> +	int data;
> +
> +	if (regmap_read(regmap, reg, &data))
> +		return -EIO;
> +
> +	*value = data & 1;
> +	return 0;
> +}
> +
> +static int dc_ti_pmic_update_power(struct regmap *regmap, int reg, int bit,
> +				   bool on)
> +{
> +	return regmap_update_bits(regmap, reg, 1, on);
> +}
> +
> +static int dc_ti_pmic_get_raw_temp(struct regmap *regmap, int reg)
> +{
> +	u8 buf[2];
> +	unsigned int val;
> +
> +	if (regmap_bulk_read(regmap, reg, buf, 2))
> +		return -EIO;
> +
> +	/* stored in big-endian */
> +	val = buf[0] & 0x03;
> +	return (val << 8) | buf[1];
> +}
> +
> +static struct intel_pmic_opregion_data dc_ti_pmic_opregion_data = {

const?

> +	.get_power = dc_ti_pmic_get_power,
> +	.update_power = dc_ti_pmic_update_power,
> +	.get_raw_temp = dc_ti_pmic_get_raw_temp,
> +	.power_table = dc_ti_power_table,
> +	.power_table_count = ARRAY_SIZE(dc_ti_power_table),
> +	.thermal_table = dc_ti_thermal_table,
> +	.thermal_table_count = ARRAY_SIZE(dc_ti_thermal_table),
> +};
> +
> +static int dc_ti_pmic_opregion_probe(struct platform_device *pdev)
> +{
> +	struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
> +	int err;
> +
> +	err = intel_pmic_install_opregion_handler(&pdev->dev,
> +			ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
> +			&dc_ti_pmic_opregion_data);
> +	if (err < 0)
> +		return err;
> +
> +	/* Re-enumerate devices depending on PMIC */
> +	acpi_walk_dep_device_list(ACPI_HANDLE(pdev->dev.parent));
> +	return 0;
> +}
> +
> +static struct platform_device_id dc_ti_pmic_opregion_id_table[] = {

const?

Regardless of the above,

Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
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Andy Shevchenko Aug. 24, 2017, 9:23 a.m. UTC | #2 
On Thu, Aug 24, 2017 at 11:11 AM, Takashi Iwai <tiwai@suse.de> wrote:
> This patch adds the opregion driver for Dollar Cove TI PMIC on Intel
> Cherry Trail devices.  The patch is based on the original work by
> Intel, found at:
>       https://github.com/01org/ProductionKernelQuilts
> with many cleanups and rewrites.
>
> The driver is currently provided only as built-in to follow other
> PMIC opregion drivers convention.
>
> The re-enumeration of devices at probe is required for fixing the
> issues on HP x2 210 G2.  See bug#195689.
>

One comment below, otherwise

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>

> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=193891
> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=195689
> Signed-off-by: Takashi Iwai <tiwai@suse.de>
> ---
> v1->v2:
> * get_raw_temp cleanup in opregion driver, mention about register
>   endianess
>
>  drivers/acpi/Kconfig                 |   6 ++
>  drivers/acpi/Makefile                |   1 +
>  drivers/acpi/pmic/intel_pmic_dc_ti.c | 139 +++++++++++++++++++++++++++++++++++
>  3 files changed, 146 insertions(+)
>  create mode 100644 drivers/acpi/pmic/intel_pmic_dc_ti.c
>
> diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
> index 1ce52f84dc23..9da8dcefde7b 100644
> --- a/drivers/acpi/Kconfig
> +++ b/drivers/acpi/Kconfig
> @@ -521,6 +521,12 @@ config CHT_WC_PMIC_OPREGION
>         help
>           This config adds ACPI operation region support for CHT Whiskey Cove PMIC.
>
> +config DC_TI_PMIC_OPREGION
> +       bool "ACPI operation region support for Dollar Cove TI PMIC"
> +       depends on INTEL_SOC_PMIC_DC_TI
> +       help
> +         This config adds ACPI operation region support for Dollar Cove TI PMIC.
> +
>  endif
>
>  config ACPI_CONFIGFS
> diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
> index b1aacfc62b1f..0a9008b971af 100644
> --- a/drivers/acpi/Makefile
> +++ b/drivers/acpi/Makefile
> @@ -103,6 +103,7 @@ obj-$(CONFIG_CRC_PMIC_OPREGION) += pmic/intel_pmic_crc.o
>  obj-$(CONFIG_XPOWER_PMIC_OPREGION) += pmic/intel_pmic_xpower.o
>  obj-$(CONFIG_BXT_WC_PMIC_OPREGION) += pmic/intel_pmic_bxtwc.o
>  obj-$(CONFIG_CHT_WC_PMIC_OPREGION) += pmic/intel_pmic_chtwc.o
> +obj-$(CONFIG_DC_TI_PMIC_OPREGION) += pmic/intel_pmic_dc_ti.o
>
>  obj-$(CONFIG_ACPI_CONFIGFS)    += acpi_configfs.o
>
> diff --git a/drivers/acpi/pmic/intel_pmic_dc_ti.c b/drivers/acpi/pmic/intel_pmic_dc_ti.c
> new file mode 100644
> index 000000000000..a2be1270eeeb
> --- /dev/null
> +++ b/drivers/acpi/pmic/intel_pmic_dc_ti.c
> @@ -0,0 +1,139 @@
> +/*
> + * Dollar Cove TI PMIC operation region driver
> + * Copyright (C) 2014 Intel Corporation. All rights reserved.
> + *
> + * Rewritten and cleaned up
> + * Copyright (C) 2017 Takashi Iwai <tiwai@suse.de>
> + */
> +
> +#include <linux/acpi.h>
> +#include <linux/init.h>
> +#include <linux/mfd/intel_soc_pmic.h>
> +#include <linux/platform_device.h>
> +#include "intel_pmic.h"
> +
> +/* registers stored in 16bit BE (high:low, total 10bit) */
> +#define DC_TI_VBAT     0x54
> +#define DC_TI_DIETEMP  0x56
> +#define DC_TI_BPTHERM  0x58
> +#define DC_TI_GPADC    0x5a
> +
> +static struct pmic_table dc_ti_power_table[] = {
> +       { .address = 0x00, .reg = 0x41 },
> +       { .address = 0x04, .reg = 0x42 },
> +       { .address = 0x08, .reg = 0x43 },
> +       { .address = 0x0c, .reg = 0x45 },
> +       { .address = 0x10, .reg = 0x46 },
> +       { .address = 0x14, .reg = 0x47 },
> +       { .address = 0x18, .reg = 0x48 },
> +       { .address = 0x1c, .reg = 0x49 },
> +       { .address = 0x20, .reg = 0x4a },
> +       { .address = 0x24, .reg = 0x4b },
> +       { .address = 0x28, .reg = 0x4c },
> +       { .address = 0x2c, .reg = 0x4d },
> +       { .address = 0x30, .reg = 0x4e },
> +};
> +
> +static struct pmic_table dc_ti_thermal_table[] = {
> +       {
> +               .address = 0x00,
> +               .reg = DC_TI_GPADC
> +       },
> +       {
> +               .address = 0x0c,
> +               .reg = DC_TI_GPADC
> +       },
> +       /* TMP2 -> SYSTEMP */
> +       {
> +               .address = 0x18,
> +               .reg = DC_TI_GPADC
> +       },
> +       /* TMP3 -> BPTHERM */
> +       {
> +               .address = 0x24,
> +               .reg = DC_TI_BPTHERM
> +       },
> +       {
> +               .address = 0x30,
> +               .reg = DC_TI_GPADC
> +       },
> +       /* TMP5 -> DIETEMP */
> +       {
> +               .address = 0x3c,
> +               .reg = DC_TI_DIETEMP
> +       },
> +};
> +
> +static int dc_ti_pmic_get_power(struct regmap *regmap, int reg, int bit,
> +                               u64 *value)
> +{
> +       int data;
> +
> +       if (regmap_read(regmap, reg, &data))
> +               return -EIO;
> +
> +       *value = data & 1;
> +       return 0;
> +}
> +
> +static int dc_ti_pmic_update_power(struct regmap *regmap, int reg, int bit,
> +                                  bool on)
> +{
> +       return regmap_update_bits(regmap, reg, 1, on);
> +}
> +
> +static int dc_ti_pmic_get_raw_temp(struct regmap *regmap, int reg)
> +{
> +       u8 buf[2];
> +       unsigned int val;
> +
> +       if (regmap_bulk_read(regmap, reg, buf, 2))
> +               return -EIO;
> +
> +       /* stored in big-endian */

> +       val = buf[0] & 0x03;
> +       return (val << 8) | buf[1];

Do you need a temporary variable at all?

       return ((buf[0] & 0x03) << 8) | buf[1];

> +}
> +
> +static struct intel_pmic_opregion_data dc_ti_pmic_opregion_data = {
> +       .get_power = dc_ti_pmic_get_power,
> +       .update_power = dc_ti_pmic_update_power,
> +       .get_raw_temp = dc_ti_pmic_get_raw_temp,
> +       .power_table = dc_ti_power_table,
> +       .power_table_count = ARRAY_SIZE(dc_ti_power_table),
> +       .thermal_table = dc_ti_thermal_table,
> +       .thermal_table_count = ARRAY_SIZE(dc_ti_thermal_table),
> +};
> +
> +static int dc_ti_pmic_opregion_probe(struct platform_device *pdev)
> +{
> +       struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
> +       int err;
> +
> +       err = intel_pmic_install_opregion_handler(&pdev->dev,
> +                       ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
> +                       &dc_ti_pmic_opregion_data);
> +       if (err < 0)
> +               return err;
> +
> +       /* Re-enumerate devices depending on PMIC */
> +       acpi_walk_dep_device_list(ACPI_HANDLE(pdev->dev.parent));
> +       return 0;
> +}
> +
> +static struct platform_device_id dc_ti_pmic_opregion_id_table[] = {
> +       { .name = "dc_ti_region" },
> +       {},
> +};
> +
> +static struct platform_driver dc_ti_pmic_opregion_driver = {
> +       .probe = dc_ti_pmic_opregion_probe,
> +       .driver = {
> +               .name = "dollar_cove_ti_pmic",
> +       },
> +       .id_table = dc_ti_pmic_opregion_id_table,
> +};
> +module_platform_driver(dc_ti_pmic_opregion_driver);
> +
> +MODULE_DESCRIPTION("Dollar Cove TI PMIC opregion driver");
> +MODULE_LICENSE("GPL v2");
> --
> 2.14.0
>
Takashi Iwai Aug. 24, 2017, 9:40 a.m. UTC | #3 
On Thu, 24 Aug 2017 11:14:53 +0200,
Mika Westerberg wrote:
> 
> On Thu, Aug 24, 2017 at 10:11:41AM +0200, Takashi Iwai wrote:
> > This patch adds the opregion driver for Dollar Cove TI PMIC on Intel
> > Cherry Trail devices.  The patch is based on the original work by
> > Intel, found at:
> >       https://github.com/01org/ProductionKernelQuilts
> > with many cleanups and rewrites.
> > 
> > The driver is currently provided only as built-in to follow other
> > PMIC opregion drivers convention.
> > 
> > The re-enumeration of devices at probe is required for fixing the
> > issues on HP x2 210 G2.  See bug#195689.
> > 
> > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=193891
> > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=195689
> > Signed-off-by: Takashi Iwai <tiwai@suse.de>
> > ---
> > v1->v2:
> > * get_raw_temp cleanup in opregion driver, mention about register
> >   endianess
> > 
> >  drivers/acpi/Kconfig                 |   6 ++
> >  drivers/acpi/Makefile                |   1 +
> >  drivers/acpi/pmic/intel_pmic_dc_ti.c | 139 +++++++++++++++++++++++++++++++++++
> >  3 files changed, 146 insertions(+)
> >  create mode 100644 drivers/acpi/pmic/intel_pmic_dc_ti.c
> > 
> > diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
> > index 1ce52f84dc23..9da8dcefde7b 100644
> > --- a/drivers/acpi/Kconfig
> > +++ b/drivers/acpi/Kconfig
> > @@ -521,6 +521,12 @@ config CHT_WC_PMIC_OPREGION
> >  	help
> >  	  This config adds ACPI operation region support for CHT Whiskey Cove PMIC.
> >  
> > +config DC_TI_PMIC_OPREGION
> > +	bool "ACPI operation region support for Dollar Cove TI PMIC"
> > +	depends on INTEL_SOC_PMIC_DC_TI
> > +	help
> > +	  This config adds ACPI operation region support for Dollar Cove TI PMIC.
> > +
> >  endif
> >  
> >  config ACPI_CONFIGFS
> > diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
> > index b1aacfc62b1f..0a9008b971af 100644
> > --- a/drivers/acpi/Makefile
> > +++ b/drivers/acpi/Makefile
> > @@ -103,6 +103,7 @@ obj-$(CONFIG_CRC_PMIC_OPREGION) += pmic/intel_pmic_crc.o
> >  obj-$(CONFIG_XPOWER_PMIC_OPREGION) += pmic/intel_pmic_xpower.o
> >  obj-$(CONFIG_BXT_WC_PMIC_OPREGION) += pmic/intel_pmic_bxtwc.o
> >  obj-$(CONFIG_CHT_WC_PMIC_OPREGION) += pmic/intel_pmic_chtwc.o
> > +obj-$(CONFIG_DC_TI_PMIC_OPREGION) += pmic/intel_pmic_dc_ti.o
> >  
> >  obj-$(CONFIG_ACPI_CONFIGFS)	+= acpi_configfs.o
> >  
> > diff --git a/drivers/acpi/pmic/intel_pmic_dc_ti.c b/drivers/acpi/pmic/intel_pmic_dc_ti.c
> > new file mode 100644
> > index 000000000000..a2be1270eeeb
> > --- /dev/null
> > +++ b/drivers/acpi/pmic/intel_pmic_dc_ti.c
> > @@ -0,0 +1,139 @@
> > +/*
> > + * Dollar Cove TI PMIC operation region driver
> > + * Copyright (C) 2014 Intel Corporation. All rights reserved.
> > + *
> > + * Rewritten and cleaned up
> > + * Copyright (C) 2017 Takashi Iwai <tiwai@suse.de>
> > + */
> > +
> > +#include <linux/acpi.h>
> > +#include <linux/init.h>
> > +#include <linux/mfd/intel_soc_pmic.h>
> > +#include <linux/platform_device.h>
> > +#include "intel_pmic.h"
> > +
> > +/* registers stored in 16bit BE (high:low, total 10bit) */
> > +#define DC_TI_VBAT	0x54
> > +#define DC_TI_DIETEMP	0x56
> > +#define DC_TI_BPTHERM	0x58
> > +#define DC_TI_GPADC	0x5a
> > +
> > +static struct pmic_table dc_ti_power_table[] = {
> 
> const?
> 
> > +	{ .address = 0x00, .reg = 0x41 },
> > +	{ .address = 0x04, .reg = 0x42 },
> > +	{ .address = 0x08, .reg = 0x43 },
> > +	{ .address = 0x0c, .reg = 0x45 },
> > +	{ .address = 0x10, .reg = 0x46 },
> > +	{ .address = 0x14, .reg = 0x47 },
> > +	{ .address = 0x18, .reg = 0x48 },
> > +	{ .address = 0x1c, .reg = 0x49 },
> > +	{ .address = 0x20, .reg = 0x4a },
> > +	{ .address = 0x24, .reg = 0x4b },
> > +	{ .address = 0x28, .reg = 0x4c },
> > +	{ .address = 0x2c, .reg = 0x4d },
> > +	{ .address = 0x30, .reg = 0x4e },
> > +};
> > +
> > +static struct pmic_table dc_ti_thermal_table[] = {
> 
> const?

Oh yeah, I was too lazy.  Will cover up in the next round.


thanks,

Takashi
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Takashi Iwai Aug. 24, 2017, 9:43 a.m. UTC | #4 
On Thu, 24 Aug 2017 11:23:18 +0200,
Andy Shevchenko wrote:
> 
> On Thu, Aug 24, 2017 at 11:11 AM, Takashi Iwai <tiwai@suse.de> wrote:
> > This patch adds the opregion driver for Dollar Cove TI PMIC on Intel
> > Cherry Trail devices.  The patch is based on the original work by
> > Intel, found at:
> >       https://github.com/01org/ProductionKernelQuilts
> > with many cleanups and rewrites.
> >
> > The driver is currently provided only as built-in to follow other
> > PMIC opregion drivers convention.
> >
> > The re-enumeration of devices at probe is required for fixing the
> > issues on HP x2 210 G2.  See bug#195689.
> >
> 
> One comment below, otherwise
(snip)
> > +static int dc_ti_pmic_get_raw_temp(struct regmap *regmap, int reg)
> > +{
> > +       u8 buf[2];
> > +       unsigned int val;
> > +
> > +       if (regmap_bulk_read(regmap, reg, buf, 2))
> > +               return -EIO;
> > +
> > +       /* stored in big-endian */
> 
> > +       val = buf[0] & 0x03;
> > +       return (val << 8) | buf[1];
> 
> Do you need a temporary variable at all?
> 
>        return ((buf[0] & 0x03) << 8) | buf[1];

Right it can be dropped.  Will address it in the next round.


thanks,

Takashi
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Takashi Iwai Aug. 24, 2017, 10:03 a.m. UTC | #5 
On Thu, 24 Aug 2017 11:40:43 +0200,
Takashi Iwai wrote:
> 
> On Thu, 24 Aug 2017 11:14:53 +0200,
> Mika Westerberg wrote:
> > 
> > On Thu, Aug 24, 2017 at 10:11:41AM +0200, Takashi Iwai wrote:
> > > This patch adds the opregion driver for Dollar Cove TI PMIC on Intel
> > > Cherry Trail devices.  The patch is based on the original work by
> > > Intel, found at:
> > >       https://github.com/01org/ProductionKernelQuilts
> > > with many cleanups and rewrites.
> > > 
> > > The driver is currently provided only as built-in to follow other
> > > PMIC opregion drivers convention.
> > > 
> > > The re-enumeration of devices at probe is required for fixing the
> > > issues on HP x2 210 G2.  See bug#195689.
> > > 
> > > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=193891
> > > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=195689
> > > Signed-off-by: Takashi Iwai <tiwai@suse.de>
> > > ---
> > > v1->v2:
> > > * get_raw_temp cleanup in opregion driver, mention about register
> > >   endianess
> > > 
> > >  drivers/acpi/Kconfig                 |   6 ++
> > >  drivers/acpi/Makefile                |   1 +
> > >  drivers/acpi/pmic/intel_pmic_dc_ti.c | 139 +++++++++++++++++++++++++++++++++++
> > >  3 files changed, 146 insertions(+)
> > >  create mode 100644 drivers/acpi/pmic/intel_pmic_dc_ti.c
> > > 
> > > diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
> > > index 1ce52f84dc23..9da8dcefde7b 100644
> > > --- a/drivers/acpi/Kconfig
> > > +++ b/drivers/acpi/Kconfig
> > > @@ -521,6 +521,12 @@ config CHT_WC_PMIC_OPREGION
> > >  	help
> > >  	  This config adds ACPI operation region support for CHT Whiskey Cove PMIC.
> > >  
> > > +config DC_TI_PMIC_OPREGION
> > > +	bool "ACPI operation region support for Dollar Cove TI PMIC"
> > > +	depends on INTEL_SOC_PMIC_DC_TI
> > > +	help
> > > +	  This config adds ACPI operation region support for Dollar Cove TI PMIC.
> > > +
> > >  endif
> > >  
> > >  config ACPI_CONFIGFS
> > > diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
> > > index b1aacfc62b1f..0a9008b971af 100644
> > > --- a/drivers/acpi/Makefile
> > > +++ b/drivers/acpi/Makefile
> > > @@ -103,6 +103,7 @@ obj-$(CONFIG_CRC_PMIC_OPREGION) += pmic/intel_pmic_crc.o
> > >  obj-$(CONFIG_XPOWER_PMIC_OPREGION) += pmic/intel_pmic_xpower.o
> > >  obj-$(CONFIG_BXT_WC_PMIC_OPREGION) += pmic/intel_pmic_bxtwc.o
> > >  obj-$(CONFIG_CHT_WC_PMIC_OPREGION) += pmic/intel_pmic_chtwc.o
> > > +obj-$(CONFIG_DC_TI_PMIC_OPREGION) += pmic/intel_pmic_dc_ti.o
> > >  
> > >  obj-$(CONFIG_ACPI_CONFIGFS)	+= acpi_configfs.o
> > >  
> > > diff --git a/drivers/acpi/pmic/intel_pmic_dc_ti.c b/drivers/acpi/pmic/intel_pmic_dc_ti.c
> > > new file mode 100644
> > > index 000000000000..a2be1270eeeb
> > > --- /dev/null
> > > +++ b/drivers/acpi/pmic/intel_pmic_dc_ti.c
> > > @@ -0,0 +1,139 @@
> > > +/*
> > > + * Dollar Cove TI PMIC operation region driver
> > > + * Copyright (C) 2014 Intel Corporation. All rights reserved.
> > > + *
> > > + * Rewritten and cleaned up
> > > + * Copyright (C) 2017 Takashi Iwai <tiwai@suse.de>
> > > + */
> > > +
> > > +#include <linux/acpi.h>
> > > +#include <linux/init.h>
> > > +#include <linux/mfd/intel_soc_pmic.h>
> > > +#include <linux/platform_device.h>
> > > +#include "intel_pmic.h"
> > > +
> > > +/* registers stored in 16bit BE (high:low, total 10bit) */
> > > +#define DC_TI_VBAT	0x54
> > > +#define DC_TI_DIETEMP	0x56
> > > +#define DC_TI_BPTHERM	0x58
> > > +#define DC_TI_GPADC	0x5a
> > > +
> > > +static struct pmic_table dc_ti_power_table[] = {
> > 
> > const?
> > 
> > > +	{ .address = 0x00, .reg = 0x41 },
> > > +	{ .address = 0x04, .reg = 0x42 },
> > > +	{ .address = 0x08, .reg = 0x43 },
> > > +	{ .address = 0x0c, .reg = 0x45 },
> > > +	{ .address = 0x10, .reg = 0x46 },
> > > +	{ .address = 0x14, .reg = 0x47 },
> > > +	{ .address = 0x18, .reg = 0x48 },
> > > +	{ .address = 0x1c, .reg = 0x49 },
> > > +	{ .address = 0x20, .reg = 0x4a },
> > > +	{ .address = 0x24, .reg = 0x4b },
> > > +	{ .address = 0x28, .reg = 0x4c },
> > > +	{ .address = 0x2c, .reg = 0x4d },
> > > +	{ .address = 0x30, .reg = 0x4e },
> > > +};
> > > +
> > > +static struct pmic_table dc_ti_thermal_table[] = {
> > 
> > const?
> 
> Oh yeah, I was too lazy.  Will cover up in the next round.

It seems that power_table and thermal_table are non-const in the
definition.  Also opregion_data is also passed as non-const to
intel_pmic_install_opregion_handler().

So only id_table[] can be const, so far.

(It's a good hint for further cleanup patches ;)


thanks,

Takashi
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diff mbox

Patch

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 1ce52f84dc23..9da8dcefde7b 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -521,6 +521,12 @@  config CHT_WC_PMIC_OPREGION
 	help
 	  This config adds ACPI operation region support for CHT Whiskey Cove PMIC.
 
+config DC_TI_PMIC_OPREGION
+	bool "ACPI operation region support for Dollar Cove TI PMIC"
+	depends on INTEL_SOC_PMIC_DC_TI
+	help
+	  This config adds ACPI operation region support for Dollar Cove TI PMIC.
+
 endif
 
 config ACPI_CONFIGFS
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index b1aacfc62b1f..0a9008b971af 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -103,6 +103,7 @@  obj-$(CONFIG_CRC_PMIC_OPREGION) += pmic/intel_pmic_crc.o
 obj-$(CONFIG_XPOWER_PMIC_OPREGION) += pmic/intel_pmic_xpower.o
 obj-$(CONFIG_BXT_WC_PMIC_OPREGION) += pmic/intel_pmic_bxtwc.o
 obj-$(CONFIG_CHT_WC_PMIC_OPREGION) += pmic/intel_pmic_chtwc.o
+obj-$(CONFIG_DC_TI_PMIC_OPREGION) += pmic/intel_pmic_dc_ti.o
 
 obj-$(CONFIG_ACPI_CONFIGFS)	+= acpi_configfs.o
 
diff --git a/drivers/acpi/pmic/intel_pmic_dc_ti.c b/drivers/acpi/pmic/intel_pmic_dc_ti.c
new file mode 100644
index 000000000000..a2be1270eeeb
--- /dev/null
+++ b/drivers/acpi/pmic/intel_pmic_dc_ti.c
@@ -0,0 +1,139 @@ 
+/*
+ * Dollar Cove TI PMIC operation region driver
+ * Copyright (C) 2014 Intel Corporation. All rights reserved.
+ *
+ * Rewritten and cleaned up
+ * Copyright (C) 2017 Takashi Iwai <tiwai@suse.de>
+ */
+
+#include <linux/acpi.h>
+#include <linux/init.h>
+#include <linux/mfd/intel_soc_pmic.h>
+#include <linux/platform_device.h>
+#include "intel_pmic.h"
+
+/* registers stored in 16bit BE (high:low, total 10bit) */
+#define DC_TI_VBAT	0x54
+#define DC_TI_DIETEMP	0x56
+#define DC_TI_BPTHERM	0x58
+#define DC_TI_GPADC	0x5a
+
+static struct pmic_table dc_ti_power_table[] = {
+	{ .address = 0x00, .reg = 0x41 },
+	{ .address = 0x04, .reg = 0x42 },
+	{ .address = 0x08, .reg = 0x43 },
+	{ .address = 0x0c, .reg = 0x45 },
+	{ .address = 0x10, .reg = 0x46 },
+	{ .address = 0x14, .reg = 0x47 },
+	{ .address = 0x18, .reg = 0x48 },
+	{ .address = 0x1c, .reg = 0x49 },
+	{ .address = 0x20, .reg = 0x4a },
+	{ .address = 0x24, .reg = 0x4b },
+	{ .address = 0x28, .reg = 0x4c },
+	{ .address = 0x2c, .reg = 0x4d },
+	{ .address = 0x30, .reg = 0x4e },
+};
+
+static struct pmic_table dc_ti_thermal_table[] = {
+	{
+		.address = 0x00,
+		.reg = DC_TI_GPADC
+	},
+	{
+		.address = 0x0c,
+		.reg = DC_TI_GPADC
+	},
+	/* TMP2 -> SYSTEMP */
+	{
+		.address = 0x18,
+		.reg = DC_TI_GPADC
+	},
+	/* TMP3 -> BPTHERM */
+	{
+		.address = 0x24,
+		.reg = DC_TI_BPTHERM
+	},
+	{
+		.address = 0x30,
+		.reg = DC_TI_GPADC
+	},
+	/* TMP5 -> DIETEMP */
+	{
+		.address = 0x3c,
+		.reg = DC_TI_DIETEMP
+	},
+};
+
+static int dc_ti_pmic_get_power(struct regmap *regmap, int reg, int bit,
+				u64 *value)
+{
+	int data;
+
+	if (regmap_read(regmap, reg, &data))
+		return -EIO;
+
+	*value = data & 1;
+	return 0;
+}
+
+static int dc_ti_pmic_update_power(struct regmap *regmap, int reg, int bit,
+				   bool on)
+{
+	return regmap_update_bits(regmap, reg, 1, on);
+}
+
+static int dc_ti_pmic_get_raw_temp(struct regmap *regmap, int reg)
+{
+	u8 buf[2];
+	unsigned int val;
+
+	if (regmap_bulk_read(regmap, reg, buf, 2))
+		return -EIO;
+
+	/* stored in big-endian */
+	val = buf[0] & 0x03;
+	return (val << 8) | buf[1];
+}
+
+static struct intel_pmic_opregion_data dc_ti_pmic_opregion_data = {
+	.get_power = dc_ti_pmic_get_power,
+	.update_power = dc_ti_pmic_update_power,
+	.get_raw_temp = dc_ti_pmic_get_raw_temp,
+	.power_table = dc_ti_power_table,
+	.power_table_count = ARRAY_SIZE(dc_ti_power_table),
+	.thermal_table = dc_ti_thermal_table,
+	.thermal_table_count = ARRAY_SIZE(dc_ti_thermal_table),
+};
+
+static int dc_ti_pmic_opregion_probe(struct platform_device *pdev)
+{
+	struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
+	int err;
+
+	err = intel_pmic_install_opregion_handler(&pdev->dev,
+			ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
+			&dc_ti_pmic_opregion_data);
+	if (err < 0)
+		return err;
+
+	/* Re-enumerate devices depending on PMIC */
+	acpi_walk_dep_device_list(ACPI_HANDLE(pdev->dev.parent));
+	return 0;
+}
+
+static struct platform_device_id dc_ti_pmic_opregion_id_table[] = {
+	{ .name = "dc_ti_region" },
+	{},
+};
+
+static struct platform_driver dc_ti_pmic_opregion_driver = {
+	.probe = dc_ti_pmic_opregion_probe,
+	.driver = {
+		.name = "dollar_cove_ti_pmic",
+	},
+	.id_table = dc_ti_pmic_opregion_id_table,
+};
+module_platform_driver(dc_ti_pmic_opregion_driver);
+
+MODULE_DESCRIPTION("Dollar Cove TI PMIC opregion driver");
+MODULE_LICENSE("GPL v2");