From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
To: Fabio Estevam <festevam@gmail.com>
Cc: Fabio Estevam <fabio.estevam@freescale.com>, barebox@lists.infradead.org
Subject: Re: [PATCH] mx6-sabrelite: Setup CCM_CCOSR register
Date: Thu, 18 Apr 2013 11:12:35 +0200 [thread overview]
Message-ID: <20130418091235.GB32215@game.jcrosoft.org> (raw)
In-Reply-To: <1366223743-29178-1-git-send-email-festevam@gmail.com>
On 15:35 Wed 17 Apr , Fabio Estevam wrote:
> From: Fabio Estevam <fabio.estevam@freescale.com>
>
> Setup CCM_CCOSR register to provide a CKO1 clock frequency of 16.5 MHz.
>
> CKO1 drives sgtl5000 codec clock on mx6qsabrelite and doing this setup in the
> bootloader will allow us to remove a lot of code in arch/arm/mach-imx/mach-imx6q.c
> from the mainline kernel.
expect the booloader to setup every think os wrong
the kernel need to handle the clock by himself
Best Regards,
J.
>
> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
> ---
> .../boards/freescale-mx6-sabrelite/flash_header.c | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/arch/arm/boards/freescale-mx6-sabrelite/flash_header.c b/arch/arm/boards/freescale-mx6-sabrelite/flash_header.c
> index 61d482b..49326e0 100644
> --- a/arch/arm/boards/freescale-mx6-sabrelite/flash_header.c
> +++ b/arch/arm/boards/freescale-mx6-sabrelite/flash_header.c
> @@ -152,6 +152,17 @@ struct imx_dcd_v2_entry __dcd_entry_section dcd_entry[] = {
> /* set IPU AXI-id0 Qos=0xf(bypass) AXI-id1 Qos=0x7 */
> DCD(MX6_IOMUXC_BASE_ADDR + 0x018, 0x007f007f),
> DCD(MX6_IOMUXC_BASE_ADDR + 0x01c, 0x007f007f),
> +
> + /*
> + * Setup CCM_CCOSR register as follows:
> + *
> + * cko1_en = 1 --> CKO1 enabled
> + * cko1_div = 111 --> divide by 8
> + * cko1_sel = 1011 --> ahb_clk_root
> + *
> + * This sets CKO1 at ahb_clk_root/8 = 132/8 = 16.5 MHz
> + */
> + DCD(MX6_CCM_BASE_ADDR + 0x060, 0x000000fb),
> };
>
> #define APP_DEST CONFIG_TEXT_BASE
> --
> 1.7.9.5
>
>
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prev parent reply other threads:[~2013-04-18 9:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-17 18:35 Fabio Estevam
2013-04-18 9:12 ` Jean-Christophe PLAGNIOL-VILLARD [this message]
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