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

[Takashi Iwai <tiwai@suse.de>]

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