linux-kernel - Re: [RFC PATCH 1/2] Add Dialog DA9030 battery charger driver

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Message-ID: <f17812d70812170049y5df3ecd9y57122387075b8302@mail.gmail.com>
Date:	Wed, 17 Dec 2008 16:49:16 +0800
From:	"Eric Miao" <eric.y.miao@...il.com>
To:	"Mike Rapoport" <mike@...pulab.co.il>
Cc:	LKML <linux-kernel@...r.kernel.org>, sameo@...nedhand.com,
	"eric miao" <eric.miao@...vell.com>, cbou@...l.ru,
	"David Woodhouse" <dwmw2@...radead.org>,
	"Jonathan Cameron" <jic23@....ac.uk>
Subject: Re: [RFC PATCH 1/2] Add Dialog DA9030 battery charger driver

On Wed, Dec 17, 2008 at 3:56 PM, Mike Rapoport <mike@...pulab.co.il> wrote:
> This patch amends DA903x MFD driver with definitions and methods needed for
> battery charger driver.
>

Patch looks generally good, see some of my concerns below:

> Signed-off-by: Mike Rapoport <mike@...pulab.co.il>
>
>  drivers/mfd/da903x.c       |   16 +++++++++++++++-
>  include/linux/mfd/da903x.h |   44 ++++++++++++++++++++++++++++++++++++++++++--
>  2 files changed, 57 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/mfd/da903x.c b/drivers/mfd/da903x.c
> index 0b5bd85..2e04b44 100644
> --- a/drivers/mfd/da903x.c
> +++ b/drivers/mfd/da903x.c
> @@ -151,12 +151,24 @@ int da903x_write(struct device *dev, int reg, uint8_t val)
>  }
>  EXPORT_SYMBOL_GPL(da903x_write);
>
> +int da903x_writes(struct device *dev, int reg, int len, uint8_t *val)
> +{
> +       return __da903x_writes(to_i2c_client(dev), reg, len, val);
> +}
> +EXPORT_SYMBOL_GPL(da903x_writes);
> +
>  int da903x_read(struct device *dev, int reg, uint8_t *val)
>  {
>        return __da903x_read(to_i2c_client(dev), reg, val);
>  }
>  EXPORT_SYMBOL_GPL(da903x_read);
>
> +int da903x_reads(struct device *dev, int reg, int len, uint8_t *val)
> +{
> +       return __da903x_reads(to_i2c_client(dev), reg, len, val);
> +}
> +EXPORT_SYMBOL_GPL(da903x_reads);
> +
>  int da903x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
>  {
>        struct da903x_chip *chip = dev_get_drvdata(dev);
> @@ -254,7 +266,7 @@ static int da9030_unmask_events(struct da903x_chip *chip, unsigned int events)
>  {
>        uint8_t v[3];
>
> -       chip->events_mask &= ~events;
> +       chip->events_mask |= events;
>

I wonder if this is true, it may also impact the da9030_mask_events(),
which is a pair.

>        v[0] = (chip->events_mask & 0xff);
>        v[1] = (chip->events_mask >> 8) & 0xff;
> @@ -391,6 +403,8 @@ static void da903x_irq_work(struct work_struct *work)
>                if (chip->ops->read_events(chip, &events))
>                        break;
>
> +/*             pr_info("%s: events=%x events_mask=%x\n", */
> +/*                     __func__, events, chip->events_mask); */

I'd prefer to remove this if it is annoying, sorry for this initial garbage
I sent.

>                events &= ~chip->events_mask;
>                if (events == 0)
>                        break;
--
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