On Tue, Oct 9, 2012 at 11:53 AM, Teresa Gámez <t.gamez@xxxxxxxxx> wrote:
> As the gpio functions are not available at this point, set the gpio manually.
>
> Signed-off-by: Teresa Gámez <t.gamez@xxxxxxxxx>
> ---
> arch/arm/mach-omap/omap4_generic.c | 29 +++++++++++++++++++++++++++--
> 1 files changed, 27 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/mach-omap/omap4_generic.c b/arch/arm/mach-omap/omap4_generic.c
> index a159dfc..81b39f9 100644
> --- a/arch/arm/mach-omap/omap4_generic.c
> +++ b/arch/arm/mach-omap/omap4_generic.c
> @@ -484,11 +484,27 @@ enum omap_boot_src omap4_bootsrc(void)
> return OMAP_BOOTSRC_UNKNOWN;
> }
>
> +#define GPIO_MASK 0x1f
> +
> +static void __iomem *omap4_get_gpio_base(unsigned gpio)
> +{
> + void __iomem *base;
> +
> + if (gpio < 32)
> + base = (void *)0x4a310000;
> + else
> + base = (void *)(0x48053000 + ((gpio & ~GPIO_MASK) << 8));
> +
> + return base;
> +}
> +
> #define I2C_SLAVE 0x12
>
> noinline int omap4_scale_vcores(unsigned vsel0_pin)
> {
> + void __iomem *base;
> unsigned int rev = omap4_revision();
> + u32 val = 0;
>
> /* For VC bypass only VCOREx_CGF_FORCE is necessary and
> * VCOREx_CFG_VOLTAGE changes can be discarded
> @@ -510,8 +526,17 @@ noinline int omap4_scale_vcores(unsigned vsel0_pin)
> * VSEL1 is grounded on board. So the following selects
> * VSEL1 = 0 and VSEL0 = 1
> */
> - gpio_direction_output(vsel0_pin, 0);
> - gpio_set_value(vsel0_pin, 1);
> + base = omap4_get_gpio_base(vsel0_pin);
> +
> + val = 1 << (vsel0_pin & GPIO_MASK);
> + writel(val, base + 0x190);
> +
> + val = readl(base + 0x134);
> + val &= (1 << (vsel0_pin & GPIO_MASK));
> + writel(val, base + 0x134);
> +
> + val = 1 << (vsel0_pin & GPIO_MASK);
> + writel(val, base + 0x194);
> }
>
> /* set VCORE1 force VSEL */
> --
> 1.7.0.4
>
Yes Teresa, this also works in my case.
Thanks,
Vicente.
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