linux-kernel - Re: [PATCH] clk: ti: clk-7xx: Remove hardwired ABE clock configuration

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Date:	Mon, 14 Sep 2015 11:52:17 +0300
From:	Peter Ujfalusi <peter.ujfalusi@...com>
To:	Tero Kristo <t-kristo@...com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>
CC:	<linux-omap@...r.kernel.org>, <linux-clk@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] clk: ti: clk-7xx: Remove hardwired ABE clock
 configuration

Hi Tero,

On 08/24/2015 10:35 AM, Peter Ujfalusi wrote:
> The ABE related clocks should be configured via DT and not have it wired
> inside of the kernel.

can you take a look at this patch? It will not cause any regression since we
do not have audio support mainline and the pending series does not need this
part anymore.

> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
> ---
> Hi Tero,
> 
> the ABE PLL configuration can, and will be done for dra7xx in DT with the
> assigned-clocks/rate/parent feature so no need to have this anymore.
> 
> Regards,
> Peter
> 
>  drivers/clk/ti/clk-7xx.c | 18 +-----------------
>  1 file changed, 1 insertion(+), 17 deletions(-)
> 
> diff --git a/drivers/clk/ti/clk-7xx.c b/drivers/clk/ti/clk-7xx.c
> index 9b5b289e6334..a911d7de3377 100644
> --- a/drivers/clk/ti/clk-7xx.c
> +++ b/drivers/clk/ti/clk-7xx.c
> @@ -18,7 +18,6 @@
>  
>  #include "clock.h"
>  
> -#define DRA7_DPLL_ABE_DEFFREQ				180633600
>  #define DRA7_DPLL_GMAC_DEFFREQ				1000000000
>  #define DRA7_DPLL_USB_DEFFREQ				960000000
>  
> @@ -313,27 +312,12 @@ static struct ti_dt_clk dra7xx_clks[] = {
>  int __init dra7xx_dt_clk_init(void)
>  {
>  	int rc;
> -	struct clk *abe_dpll_mux, *sys_clkin2, *dpll_ck, *hdcp_ck;
> +	struct clk *dpll_ck, *hdcp_ck;
>  
>  	ti_dt_clocks_register(dra7xx_clks);
>  
>  	omap2_clk_disable_autoidle_all();
>  
> -	abe_dpll_mux = clk_get_sys(NULL, "abe_dpll_sys_clk_mux");
> -	sys_clkin2 = clk_get_sys(NULL, "sys_clkin2");
> -	dpll_ck = clk_get_sys(NULL, "dpll_abe_ck");
> -
> -	rc = clk_set_parent(abe_dpll_mux, sys_clkin2);
> -	if (!rc)
> -		rc = clk_set_rate(dpll_ck, DRA7_DPLL_ABE_DEFFREQ);
> -	if (rc)
> -		pr_err("%s: failed to configure ABE DPLL!\n", __func__);
> -
> -	dpll_ck = clk_get_sys(NULL, "dpll_abe_m2x2_ck");
> -	rc = clk_set_rate(dpll_ck, DRA7_DPLL_ABE_DEFFREQ * 2);
> -	if (rc)
> -		pr_err("%s: failed to configure ABE DPLL m2x2!\n", __func__);
> -
>  	dpll_ck = clk_get_sys(NULL, "dpll_gmac_ck");
>  	rc = clk_set_rate(dpll_ck, DRA7_DPLL_GMAC_DEFFREQ);
>  	if (rc)
> 


-- 
Péter
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