Re: [PATCH linux-next v3 6/7] ASoC: rsnd: add avb clocks

[Jiada Wang]

Hi Morimoto-san

Thanks for your comments

On 2018/12/05 17:58, Kuninori Morimoto wrote:
> Hi Jiada
>
> > There are AVB Counter Clocks in ADG, each clock has 12bits integral
> > and 8 bits fractional dividers which operates with S0D1Ï clock.
> >
> > This patch registers 8 AVB Counter Clocks when clock-cells of
> > rcar_sound node is 2,
> >
> > Signed-off-by: Jiada Wang <jiada_wang@xxxxxxxxxx>
> > ---
>
> > +static void clk_avb_div_write(struct rsnd_adg *adg, u32 data, unsigned int idx)
> (snip)
> > +static u32 clk_avb_div_read(struct rsnd_adg *adg, unsigned int idx)
> As I mentioned before, I think we can avoid confusable parameter by
>
> 	static void clk_avb_div_write(struct clk_avb *avb, u32 data)
> 	static u32 clk_avb_div_read(struct clk_avb)	
>
> 	div = clk_avb_div_read(avb);
> 	clk_avb_div_write(avb, val | div);
right, I forgot to update this, will address it in next version
> > +static struct clk *clk_register_avb(struct device *dev, struct rsnd_adg *adg,
> > +				    unsigned int id, spinlock_t *lock)
> > +{
> > +	struct clk_init_data init;
> > +	struct clk_avb *avb;
> > +	struct clk *clk;
> > +	char name[8];
> > +	const char *parent_name;
> > +
> > +	if (IS_ERR(adg->clkadg))
> > +		return ERR_PTR(-ENODEV);
> I think adg->clkadg will never hit to IS_ERR().
> It will have NULL or correct pointer.
right, will update this in next version
> 	clk = devm_clk_get(dev, "adg");
> 	if (!IS_ERR(clk))
> 		adg->clkadg = clk;
>
> And this "adg" clock is strange.
> see below
>
> > +	avb = devm_kzalloc(dev, sizeof(*avb), GFP_KERNEL);
> > +	if (!avb)
> > +		return ERR_PTR(-ENOMEM);
> > +
> > +	parent_name = __clk_get_name(adg->clkadg);
> This parent_name is very strange to me.
> AVB parent clk is "AUDIO_CLK_A/B/C/I" (= clk_a/b/c/i in this driver)
> or "AUDIO_CLK_OUT_A/B/C/D" (= audio_clkout/1/2/3 in this driver).
> And we don't have "adg" clock.
> Please double check it.
I have some local device-tree change, which expends 'adg' register range 
and add
"adg" clock to rcar_sound node which refer to newly added 'adg' clock 
(S0D1Ï) in this patch-set

the change looks like the following

ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ compatible =Â "renesas,rcar_sound-r8a7795", 
"renesas,rcar_sound-gen3";
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ reg =ÂÂ <0 0xec500000 0 0x1000>, /* SCU */
- <0 0xec5a0000 0 0x100>, /* ADG */
+ <0 0xec5a0000 0 0x140>, /* ADG */
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ <0 0xec540000 0 0x1000>, /* SSIU */
 <0 0xec541000 0 0x280>, /* SSI */
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ <0 0xec740000 0 0x200>;Â /* Audio DMAC 
peri peri*/
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ reg-names = "scu", "adg", "ssiu", "ssi", "audmapp";

-ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ clocks = <&cpg CPG_MOD 1005>,
+ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ clocks = <&cpg CPG_MOD 922>, <&cpg CPG_MOD 1005>,
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ <&cpg CPG_MOD 1006>, <&cpg CPG_MOD 1007>,
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ <&cpg CPG_MOD 1008>, <&cpg CPG_MOD 1009>,
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ <&cpg CPG_MOD 1010>, <&cpg CPG_MOD 1011>,
@@ -1856,7 +1856,7 @@
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ <&audio_clk_a>, <&audio_clk_b>,
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ <&audio_clk_c>,
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ <&cpg CPG_CORE R8A7795_CLK_S0D4>;
-ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ clock-names = "ssi-all",
+ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ clock-names = "adg", "ssi-all",
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ "ssi.9", "ssi.8", "ssi.7", "ssi.6",
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ "ssi.5", "ssi.4", "ssi.3", "ssi.2",
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ "ssi.1", "ssi.0",

Thanks,
Jiada

> Best regards
> ---
> Kuninori Morimoto