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Date:	Thu, 22 May 2014 13:51:46 -0700
From:	Mike Turquette <mturquette@...aro.org>
To:	Linus Walleij <linus.walleij@...aro.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	"Linus Walleij" <linus.walleij@...aro.org>
Subject: Re: [PATCH] clk: impd1: add pclk clocks

Quoting Linus Walleij (2014-04-15 01:29:45)
> The IM-PD1 PrimeCells all have pclk assignments though this clock
> cannot be controlled, and we need to provide this as a dummy
> clock for the PL061 GPIO driver to probe, so let's assign it to
> all the cells on the board.
> 
> Cc: Mike Turquette <mturquette@...aro.org>
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>

Taken into clk-next.

Thanks,
Mike

> ---
>  drivers/clk/versatile/clk-impd1.c | 36 +++++++++++++++++++++++++++++-------
>  1 file changed, 29 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/clk/versatile/clk-impd1.c b/drivers/clk/versatile/clk-impd1.c
> index 31b44f025f9e..8d7d4d5a514c 100644
> --- a/drivers/clk/versatile/clk-impd1.c
> +++ b/drivers/clk/versatile/clk-impd1.c
> @@ -20,6 +20,8 @@
>  #define IMPD1_LOCK     0x08
>  
>  struct impd1_clk {
> +       char *pclkname;
> +       struct clk *pclk;
>         char *vco1name;
>         struct clk *vco1clk;
>         char *vco2name;
> @@ -31,7 +33,7 @@ struct impd1_clk {
>         struct clk *spiclk;
>         char *scname;
>         struct clk *scclk;
> -       struct clk_lookup *clks[6];
> +       struct clk_lookup *clks[15];
>  };
>  
>  /* One entry for each connected IM-PD1 LM */
> @@ -86,6 +88,7 @@ void integrator_impd1_clk_init(void __iomem *base, unsigned int id)
>  {
>         struct impd1_clk *imc;
>         struct clk *clk;
> +       struct clk *pclk;
>         int i;
>  
>         if (id > 3) {
> @@ -94,11 +97,18 @@ void integrator_impd1_clk_init(void __iomem *base, unsigned int id)
>         }
>         imc = &impd1_clks[id];
>  
> +       /* Register the fixed rate PCLK */
> +       imc->pclkname = kasprintf(GFP_KERNEL, "lm%x-pclk", id);
> +       pclk = clk_register_fixed_rate(NULL, imc->pclkname, NULL,
> +                                     CLK_IS_ROOT, 0);
> +       imc->pclk = pclk;
> +
>         imc->vco1name = kasprintf(GFP_KERNEL, "lm%x-vco1", id);
>         clk = icst_clk_register(NULL, &impd1_icst1_desc, imc->vco1name, NULL,
>                                 base);
>         imc->vco1clk = clk;
> -       imc->clks[0] = clkdev_alloc(clk, NULL, "lm%x:01000", id);
> +       imc->clks[0] = clkdev_alloc(pclk, "apb_pclk", "lm%x:01000", id);
> +       imc->clks[1] = clkdev_alloc(clk, NULL, "lm%x:01000", id);
>  
>         /* VCO2 is also called "CLK2" */
>         imc->vco2name = kasprintf(GFP_KERNEL, "lm%x-vco2", id);
> @@ -107,28 +117,38 @@ void integrator_impd1_clk_init(void __iomem *base, unsigned int id)
>         imc->vco2clk = clk;
>  
>         /* MMCI uses CLK2 right off */
> -       imc->clks[1] = clkdev_alloc(clk, NULL, "lm%x:00700", id);
> +       imc->clks[2] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00700", id);
> +       imc->clks[3] = clkdev_alloc(clk, NULL, "lm%x:00700", id);
>  
>         /* UART reference clock divides CLK2 by a fixed factor 4 */
>         imc->uartname = kasprintf(GFP_KERNEL, "lm%x-uartclk", id);
>         clk = clk_register_fixed_factor(NULL, imc->uartname, imc->vco2name,
>                                    CLK_IGNORE_UNUSED, 1, 4);
>         imc->uartclk = clk;
> -       imc->clks[2] = clkdev_alloc(clk, NULL, "lm%x:00100", id);
> -       imc->clks[3] = clkdev_alloc(clk, NULL, "lm%x:00200", id);
> +       imc->clks[4] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00100", id);
> +       imc->clks[5] = clkdev_alloc(clk, NULL, "lm%x:00100", id);
> +       imc->clks[6] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00200", id);
> +       imc->clks[7] = clkdev_alloc(clk, NULL, "lm%x:00200", id);
>  
>         /* SPI PL022 clock divides CLK2 by a fixed factor 64 */
>         imc->spiname = kasprintf(GFP_KERNEL, "lm%x-spiclk", id);
>         clk = clk_register_fixed_factor(NULL, imc->spiname, imc->vco2name,
>                                    CLK_IGNORE_UNUSED, 1, 64);
> -       imc->clks[4] = clkdev_alloc(clk, NULL, "lm%x:00300", id);
> +       imc->clks[8] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00300", id);
> +       imc->clks[9] = clkdev_alloc(clk, NULL, "lm%x:00300", id);
> +
> +       /* The GPIO blocks and AACI have only PCLK */
> +       imc->clks[10] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00400", id);
> +       imc->clks[11] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00500", id);
> +       imc->clks[12] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00800", id);
>  
>         /* Smart Card clock divides CLK2 by a fixed factor 4 */
>         imc->scname = kasprintf(GFP_KERNEL, "lm%x-scclk", id);
>         clk = clk_register_fixed_factor(NULL, imc->scname, imc->vco2name,
>                                    CLK_IGNORE_UNUSED, 1, 4);
>         imc->scclk = clk;
> -       imc->clks[5] = clkdev_alloc(clk, NULL, "lm%x:00600", id);
> +       imc->clks[13] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00600", id);
> +       imc->clks[14] = clkdev_alloc(clk, NULL, "lm%x:00600", id);
>  
>         for (i = 0; i < ARRAY_SIZE(imc->clks); i++)
>                 clkdev_add(imc->clks[i]);
> @@ -149,9 +169,11 @@ void integrator_impd1_clk_exit(unsigned int id)
>         clk_unregister(imc->uartclk);
>         clk_unregister(imc->vco2clk);
>         clk_unregister(imc->vco1clk);
> +       clk_unregister(imc->pclk);
>         kfree(imc->scname);
>         kfree(imc->spiname);
>         kfree(imc->uartname);
>         kfree(imc->vco2name);
>         kfree(imc->vco1name);
> +       kfree(imc->pclkname);
>  }
> -- 
> 1.9.0
> 
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