[PATCH 2/3] clk: ux500: abx500: Define clock tree for ab850x

[fabio.baltieri@linaro.org (Fabio Baltieri)]

Hi Ulf,

On Wed, Apr 03, 2013 at 01:06:26AM +0200, Ulf Hansson wrote:
> From: Ulf Hansson <ulf.hansson@linaro.org>
> 
> The patch setups the first version of the clock tree for ab850x, which
> is used by u8500 platforms. Mainly sysctrl clocks are used.

I was just going to ask you if you had plans to develop this stuff, as I
was missing a clock for ab8500-usb.

This worked nice for me so, FWIW:

Tested-by: Fabio Baltieri <fabio.baltieri@linaro.org>

Thanks,
Fabio

> 
> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> ---
>  drivers/clk/ux500/abx500-clk.c |   71 ++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 68 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/clk/ux500/abx500-clk.c b/drivers/clk/ux500/abx500-clk.c
> index 9f7400d..a0fca00 100644
> --- a/drivers/clk/ux500/abx500-clk.c
> +++ b/drivers/clk/ux500/abx500-clk.c
> @@ -12,13 +12,78 @@
>  #include <linux/device.h>
>  #include <linux/platform_device.h>
>  #include <linux/mfd/abx500/ab8500.h>
> -
> -/* TODO: Add clock implementations here */
> -
> +#include <linux/mfd/abx500/ab8500-sysctrl.h>
> +#include <linux/clk.h>
> +#include <linux/clkdev.h>
> +#include <linux/clk-provider.h>
> +#include <linux/mfd/dbx500-prcmu.h>
> +#include "clk.h"
>  
>  /* Clock definitions for ab8500 */
>  static int ab8500_reg_clks(struct device *dev)
>  {
> +	int ret;
> +	struct clk *clk;
> +
> +	const char *intclk_parents[] = {"ab8500_sysclk", "ulpclk"};
> +	u16 intclk_reg_sel[] = {0 , AB8500_SYSULPCLKCTRL1};
> +	u8 intclk_reg_mask[] = {0 , AB8500_SYSULPCLKCTRL1_SYSULPCLKINTSEL_MASK};
> +	u8 intclk_reg_bits[] = {
> +		0 ,
> +		(1 << AB8500_SYSULPCLKCTRL1_SYSULPCLKINTSEL_SHIFT)
> +	};
> +
> +	dev_info(dev, "register clocks for ab850x\n");
> +
> +	/* Enable SWAT */
> +	ret = ab8500_sysctrl_set(AB8500_SWATCTRL, AB8500_SWATCTRL_SWATENABLE);
> +	if (ret)
> +		return ret;
> +
> +	/* ab8500_sysclk */
> +	clk = clk_reg_prcmu_gate("ab8500_sysclk", NULL, PRCMU_SYSCLK,
> +				CLK_IS_ROOT);
> +	clk_register_clkdev(clk, "sysclk", "ab8500-usb.0");
> +	clk_register_clkdev(clk, "sysclk", "ab-iddet.0");
> +	clk_register_clkdev(clk, "sysclk", "ab85xx-codec.0");
> +	clk_register_clkdev(clk, "sysclk", "shrm_bus");
> +
> +	/* ab8500_sysclk2 */
> +	clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk2", "ab8500_sysclk",
> +		AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF2REQ,
> +		AB8500_SYSULPCLKCTRL1_SYSCLKBUF2REQ, 0, 0);
> +	clk_register_clkdev(clk, "sysclk", "0-0070");
> +
> +	/* ab8500_sysclk3 */
> +	clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk3", "ab8500_sysclk",
> +		AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF3REQ,
> +		AB8500_SYSULPCLKCTRL1_SYSCLKBUF3REQ, 0, 0);
> +	clk_register_clkdev(clk, "sysclk", "cg1960_core.0");
> +
> +	/* ab8500_sysclk4 */
> +	clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk4", "ab8500_sysclk",
> +		AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF4REQ,
> +		AB8500_SYSULPCLKCTRL1_SYSCLKBUF4REQ, 0, 0);
> +
> +	/* ab_ulpclk */
> +	clk = clk_reg_sysctrl_gate_fixed_rate(dev, "ulpclk", NULL,
> +		AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_ULPCLKREQ,
> +		AB8500_SYSULPCLKCTRL1_ULPCLKREQ,
> +		38400000, 9000, CLK_IS_ROOT);
> +	clk_register_clkdev(clk, "ulpclk", "ab85xx-codec.0");
> +
> +	/* ab8500_intclk */
> +	clk = clk_reg_sysctrl_set_parent(dev , "intclk", intclk_parents, 2,
> +		intclk_reg_sel, intclk_reg_mask, intclk_reg_bits, 0);
> +	clk_register_clkdev(clk, "intclk", "ab85xx-codec.0");
> +	clk_register_clkdev(clk, NULL, "ab8500-pwm.1");
> +
> +	/* ab8500_audioclk */
> +	clk = clk_reg_sysctrl_gate(dev , "audioclk", "intclk",
> +		AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_AUDIOCLKENA,
> +		AB8500_SYSULPCLKCTRL1_AUDIOCLKENA, 0, 0);
> +	clk_register_clkdev(clk, "audioclk", "ab85xx-codec.0");
> +
>  	return 0;
>  }

-- 
Fabio Baltieri