From: Ming Lei <tom.leiming@gmail.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
heikki.krogerus@linux.intel.com
Subject: Re: [PATCH v3 2/3] clk: fractional-divider: keep mwidth and nwidth internally
Date: Thu, 9 Apr 2015 16:22:08 +0800 [thread overview]
Message-ID: <CACVXFVNUBcrgho3G_whaXAEVBgg0a1KsWmAH50bW6dVcyMwvPw@mail.gmail.com> (raw)
In-Reply-To: <1427882948-97260-3-git-send-email-andriy.shevchenko@linux.intel.com>
On Wed, Apr 1, 2015 at 6:09 PM, Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:
> The patch adds mwidth and nwidth fields to the struct clk_fractional_divider
> for further usage. While here, use clk_div_mask() instead of open coding this
> functionality.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> ---
> drivers/clk/clk-fractional-divider.c | 8 +++++---
> include/linux/clk-provider.h | 3 ++-
> 2 files changed, 7 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/clk/clk-fractional-divider.c b/drivers/clk/clk-fractional-divider.c
> index 786aa482..23a56a0 100644
> --- a/drivers/clk/clk-fractional-divider.c
> +++ b/drivers/clk/clk-fractional-divider.c
> @@ -50,7 +50,7 @@ static long clk_fd_round_rate(struct clk_hw *hw, unsigned long rate,
> unsigned long *prate)
> {
> struct clk_fractional_divider *fd = to_clk_fd(hw);
> - unsigned maxn = (fd->nmask >> fd->nshift) + 1;
> + unsigned maxn = clk_div_mask(fd->nwidth) + 1;
Looks clk_div_mask() can't be found when I build the latest
next with these 3 patches:
CC drivers/clk/clk-fractional-divider.o
drivers/clk/clk-fractional-divider.c: In function ‘clk_fd_round_rate’:
drivers/clk/clk-fractional-divider.c:67:4: error: implicit declaration
of function ‘clk_div_mask’ [-Werror=implicit-function-declaration]
clk_div_mask(fd->mwidth), clk_div_mask(fd->nwidth),
^
cc1: some warnings being treated as errors
make[2]: *** [drivers/clk/clk-fractional-divider.o] Error 1
Thanks,
> unsigned div;
>
> if (!rate || rate >= *prate)
> @@ -130,9 +130,11 @@ struct clk *clk_register_fractional_divider(struct device *dev,
>
> fd->reg = reg;
> fd->mshift = mshift;
> - fd->mmask = (BIT(mwidth) - 1) << mshift;
> + fd->mwidth = mwidth;
> + fd->mmask = clk_div_mask(mwidth) << mshift;
> fd->nshift = nshift;
> - fd->nmask = (BIT(nwidth) - 1) << nshift;
> + fd->nwidth = nwidth;
> + fd->nmask = clk_div_mask(nwidth) << nshift;
> fd->flags = clk_divider_flags;
> fd->lock = lock;
> fd->hw.init = &init;
> diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
> index 20b0b67..eb3c96f 100644
> --- a/include/linux/clk-provider.h
> +++ b/include/linux/clk-provider.h
> @@ -480,13 +480,14 @@ struct clk *clk_register_fixed_factor(struct device *dev, const char *name,
> *
> * Clock with adjustable fractional divider affecting its output frequency.
> */
> -
> struct clk_fractional_divider {
> struct clk_hw hw;
> void __iomem *reg;
> u8 mshift;
> + u8 mwidth;
> u32 mmask;
> u8 nshift;
> + u8 nwidth;
> u32 nmask;
> u8 flags;
> spinlock_t *lock;
> --
> 2.1.4
>
> --
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--
Ming Lei
next prev parent reply other threads:[~2015-04-09 8:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-01 10:09 [PATCH v3 0/3] clk: fractional-divider: do a clean up Andy Shevchenko
2015-04-01 10:09 ` [PATCH v3 1/3] clk: fractional-divider: fix sparse warnings Andy Shevchenko
2015-04-01 10:09 ` [PATCH v3 2/3] clk: fractional-divider: keep mwidth and nwidth internally Andy Shevchenko
2015-04-09 8:22 ` Ming Lei [this message]
2015-05-06 10:58 ` Andy Shevchenko
2015-04-01 10:09 ` [PATCH v3 3/3] clk: fractional-divider: switch to rational best approximation Andy Shevchenko
2015-06-18 20:39 ` [PATCH v3 0/3] clk: fractional-divider: do a clean up Stephen Boyd
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