linux-kernel - Re: [PATCH] clk: meson: mpll: fix mpll0 fractional part ignored

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Message-ID: <e01befc7-7bc2-57eb-a52b-8ebb4c2a643a@baylibre.com>
Date:   Mon, 31 Jul 2017 10:09:00 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Jerome Brunet <jbrunet@...libre.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Kevin Hilman <khilman@...libre.com>
Cc:     Carlo Caione <carlo@...one.org>, linux-amlogic@...ts.infradead.org,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clk: meson: mpll: fix mpll0 fractional part ignored

On 07/28/2017 06:32 PM, Jerome Brunet wrote:
> mpll0 clock is special compared to the other mplls. It needs another
> bit (ssen) to be set to activate the fractional part the mpll divider
> 
> Fixes: 007e6e5c5f01 ("clk: meson: mpll: add rw operation")
> Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
> ---
>  drivers/clk/meson/clk-mpll.c | 7 +++++++
>  drivers/clk/meson/clkc.h     | 1 +
>  drivers/clk/meson/gxbb.c     | 5 +++++
>  drivers/clk/meson/meson8b.c  | 5 +++++
>  4 files changed, 18 insertions(+)
> 
> diff --git a/drivers/clk/meson/clk-mpll.c b/drivers/clk/meson/clk-mpll.c
> index 39eab69fe51a..44a5a535ca63 100644
> --- a/drivers/clk/meson/clk-mpll.c
> +++ b/drivers/clk/meson/clk-mpll.c
> @@ -161,6 +161,13 @@ static int mpll_set_rate(struct clk_hw *hw,
>  	reg = PARM_SET(p->width, p->shift, reg, 1);
>  	writel(reg, mpll->base + p->reg_off);
>  
> +	p = &mpll->ssen;
> +	if (p->width != 0) {
> +		reg = readl(mpll->base + p->reg_off);
> +		reg = PARM_SET(p->width, p->shift, reg, 1);
> +		writel(reg, mpll->base + p->reg_off);
> +	}
> +
>  	p = &mpll->n2;
>  	reg = readl(mpll->base + p->reg_off);
>  	reg = PARM_SET(p->width, p->shift, reg, n2);
> diff --git a/drivers/clk/meson/clkc.h b/drivers/clk/meson/clkc.h
> index d6feafe8bd6c..1629da9b4141 100644
> --- a/drivers/clk/meson/clkc.h
> +++ b/drivers/clk/meson/clkc.h
> @@ -118,6 +118,7 @@ struct meson_clk_mpll {
>  	struct parm sdm_en;
>  	struct parm n2;
>  	struct parm en;
> +	struct parm ssen;
>  	spinlock_t *lock;
>  };
>  
> diff --git a/drivers/clk/meson/gxbb.c b/drivers/clk/meson/gxbb.c
> index 59a296b119ea..79b195b4df03 100644
> --- a/drivers/clk/meson/gxbb.c
> +++ b/drivers/clk/meson/gxbb.c
> @@ -528,6 +528,11 @@ static struct meson_clk_mpll gxbb_mpll0 = {
>  		.shift   = 14,
>  		.width	 = 1,
>  	},
> +	.ssen = {
> +		.reg_off = HHI_MPLL_CNTL,
> +		.shift   = 25,
> +		.width	 = 1,
> +	},
>  	.lock = &clk_lock,
>  	.hw.init = &(struct clk_init_data){
>  		.name = "mpll0",
> diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c
> index bb3f1de876b1..6ec512ad2598 100644
> --- a/drivers/clk/meson/meson8b.c
> +++ b/drivers/clk/meson/meson8b.c
> @@ -267,6 +267,11 @@ static struct meson_clk_mpll meson8b_mpll0 = {
>  		.shift   = 14,
>  		.width   = 1,
>  	},
> +	.ssen = {
> +		.reg_off = HHI_MPLL_CNTL,
> +		.shift   = 25,
> +		.width   = 1,
> +	},
>  	.lock = &clk_lock,
>  	.hw.init = &(struct clk_init_data){
>  		.name = "mpll0",
> 


Applied to clk-meson's fixes/drivers !