linux-kernel - Re: [PATCH 05/10] leds: lp5523: make separate API for loading engine

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Date:	Tue, 13 Aug 2013 13:54:08 -0700
From:	Bryan Wu <cooloney@...il.com>
To:	Milo Kim <woogyom.kim@...il.com>
Cc:	Pali Rohár <pali.rohar@...il.com>,
	Linux LED Subsystem <linux-leds@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>, Milo Kim <milo.kim@...com>
Subject: Re: [PATCH 05/10] leds: lp5523: make separate API for loading engine

On Thu, Aug 8, 2013 at 12:59 AM, Milo Kim <woogyom.kim@...il.com> wrote:
> lp5523_load_engine()
>   It is called whenever the operation mode is changed to 'load'.
>   It is used for simple operation mode change.
>   It will be used when engine mode and LED selection is updated in later patch.
>
> lp5523_load_engine_and_select_page()
>   Change the operation mode to 'load' and select program page number.
>   This is used for programming a LED pattern at a time.
>   So load_engine() is replaced with new API, load_engine_and_select_page()
>   in lp5523_firmware_loaded().
>

Looks good, please make sure these functions are called with mutex lock hold.
Thanks,
-Bryan

> Signed-off-by: Milo Kim <milo.kim@...com>
> ---
>  drivers/leds/leds-lp5523.c |   14 ++++++++++----
>  1 file changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
> index 72c10e2..b509480 100644
> --- a/drivers/leds/leds-lp5523.c
> +++ b/drivers/leds/leds-lp5523.c
> @@ -152,15 +152,21 @@ static void lp5523_load_engine(struct lp55xx_chip *chip)
>                 [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3,
>         };
>
> +       lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]);
> +
> +       lp5523_wait_opmode_done();
> +}
> +
> +static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip)
> +{
> +       enum lp55xx_engine_index idx = chip->engine_idx;
>         u8 page_sel[] = {
>                 [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1,
>                 [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2,
>                 [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3,
>         };
>
> -       lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]);
> -
> -       lp5523_wait_opmode_done();
> +       lp5523_load_engine(chip);
>
>         lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]);
>  }
> @@ -290,7 +296,7 @@ static void lp5523_firmware_loaded(struct lp55xx_chip *chip)
>          *  2) write firmware data into program memory
>          */
>
> -       lp5523_load_engine(chip);
> +       lp5523_load_engine_and_select_page(chip);
>         lp5523_update_program_memory(chip, fw->data, fw->size);
>  }
>
> --
> 1.7.9.5
>
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