On Mon, Apr 28, 2014 at 8:11 PM, Fabio Estevam <feste...@gmail.com> wrote:
> From: Fabio Estevam <fabio.este...@freescale.com>
>
> On mx6sl there is a LVE (Low Voltage Enable) in the IOMUXC_SW_PAD_CTL
> register.
>
> LVE is bit 22 of IOMUXC_SW_PAD_CTL register, but in order to make the
> calculation easier we can define it as bit 17 as this bit is unused and fits
> the
> current MUX_PAD_CTRL_MASK mask.
>
> Add support for it.
>
> Signed-off-by: Fabio Estevam <fabio.este...@freescale.com>
> ---
> arch/arm/imx-common/iomux-v3.c | 8 ++++++++
> arch/arm/include/asm/imx-common/iomux-v3.h | 2 ++
> 2 files changed, 10 insertions(+)
>
> diff --git a/arch/arm/imx-common/iomux-v3.c b/arch/arm/imx-common/iomux-v3.c
> index b59b802..6e46ea8 100644
> --- a/arch/arm/imx-common/iomux-v3.c
> +++ b/arch/arm/imx-common/iomux-v3.c
> @@ -30,6 +30,14 @@ void imx_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
> (pad & MUX_PAD_CTRL_OFS_MASK) >> MUX_PAD_CTRL_OFS_SHIFT;
> u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
>
> +#if defined CONFIG_MX6SL
> + /* Check whether LVE bit needs to be set */
> + if (pad_ctrl & PAD_CTL_LVE) {
> + pad_ctrl &= ~PAD_CTL_LVE;
> + pad_ctrl |= PAD_CTL_LVE_BIT;
> + }
> +#endif
> +
> if (mux_ctrl_ofs)
> __raw_writel(mux_mode, base + mux_ctrl_ofs);
>
> diff --git a/arch/arm/include/asm/imx-common/iomux-v3.h
> b/arch/arm/include/asm/imx-common/iomux-v3.h
> index dec11a1..6d3561f 100644
> --- a/arch/arm/include/asm/imx-common/iomux-v3.h
> +++ b/arch/arm/include/asm/imx-common/iomux-v3.h
> @@ -88,6 +88,8 @@ typedef u64 iomux_v3_cfg_t;
> #ifdef CONFIG_MX6
>
> #define PAD_CTL_HYS (1 << 16)
> +#define PAD_CTL_LVE (1 << 17)
> +#define PAD_CTL_LVE_BIT (1 << 22)
This conflicts with:
#define NO_PAD_CTRL (1 << 17)
I have changed the MASK as:
-#define MUX_PAD_CTRL_MASK ((iomux_v3_cfg_t)0x3ffff << MUX_PAD_CTRL_SHIFT)
+#define MUX_PAD_CTRL_MASK ((iomux_v3_cfg_t)0x43ffff << MUX_PAD_CTRL_SHIFT)
and seems to work fine. Do you see any issue?
--
Otavio Salvador O.S. Systems
http://www.ossystems.com.br http://code.ossystems.com.br
Mobile: +55 (53) 9981-7854 Mobile: +1 (347) 903-9750
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