On Wed, Mar 27, 2013 at 03:40:36PM +0100, Alexandre Belloni wrote:
> The cfa-10036 comes in two flavours, with either 128MB or 256MB of RAM
> on it.
>
> Since it's not stored anywhere, we need to runtime detect it by
> introducing the cfa10036_get_ram_size function.
>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
Applied, thanks.
> Cc: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
> ---
> changes since v1:
> - stripped cfa10036_get_ram_size as suggested by Sacha
> - I'm not too happy about the v5_mmu_cache_flush definition and call but that
> has to be done, else we are not reading the modified value, even on 128MB
> boards.
So your data cache works. That's good news ;)
Sascha
>
>
> arch/arm/boards/crystalfontz-cfa10036/cfa10036.c | 18 +++++++++++++++++-
> 1 file changed, 17 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> index 1bc20cf..a37b089 100644
> --- a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> +++ b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> @@ -90,9 +90,25 @@ static struct i2c_gpio_platform_data i2c_gpio_pdata = {
> .udelay = 5, /* ~100 kHz */
> };
>
> +void v5_mmu_cache_flush(void);
> +long cfa10036_get_ram_size(void)
> +{
> + volatile u32 *base = (void *)IMX_MEMORY_BASE;
> + volatile u32 *ofs = base + SZ_128M / sizeof(u32);
> +
> + *base = *ofs = 0xdeadbeef;
> + *ofs = 0xbaadcafe;
> +
> + v5_mmu_cache_flush();
> + if (*base == 0xbaadcafe)
> + return SZ_128M;
> + else
> + return SZ_256M;
> +}
> +
> static int cfa10036_mem_init(void)
> {
> - arm_add_mem_device("ram0", IMX_MEMORY_BASE, 128 * 1024 * 1024);
> + arm_add_mem_device("ram0", IMX_MEMORY_BASE, cfa10036_get_ram_size());
>
> return 0;
> }
> --
> 1.7.10.4
>
>
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