[PATCH v9 2/2] arm-soc: Add support for tango4 platforms
Kevin Hilman
khilman at kernel.org
Thu Nov 19 11:49:08 PST 2015
Marc Gonzalez <marc_gonzalez at sigmadesigns.com> writes:
> Add support for Sigma Designs ARM-based Tango4 "Secure Media Processor"
> platforms (i.e. smp8734, smp8756, smp8758, smp8759) built around the
> Cortex-A9 MPCore r3p0 (all dual-core, except the 8756).
>
> Support for older MIPS-based platforms can be found elsewhere:
> https://github.com/mansr/linux-tangox
>
> Signed-off-by: Marc Gonzalez <marc_gonzalez at sigmadesigns.com>
[...]
> +static void tango_l2c_write(unsigned long val, unsigned int reg)
> +{
> + pr_debug("%s: reg=0x%x val=0x%lx\n", __func__, reg, val);
leftover debugging aid?
> + if (reg == L2X0_CTRL)
> + tango_set_l2_control(val);
> +}
> +
[...]
> diff --git a/arch/arm/mach-tangox/smc.S b/arch/arm/mach-tangox/smc.S
> new file mode 100644
> index 000000000000..5d932ce3c1bd
> --- /dev/null
> +++ b/arch/arm/mach-tangox/smc.S
> @@ -0,0 +1,9 @@
> +#include <linux/linkage.h>
> +
> +ENTRY(tango_smc)
> + push {lr}
> + mov ip, r1
> + dsb /* This barrier is probably unnecessary */
Then remove it?
> + smc #0
> + pop {pc}
> +ENDPROC(tango_smc)
Otherwise looks pretty simple and straight forward to me.
FWIW, one of the benefits of starting with the small/minimum set and
adding as you go is that it's much easier on reviewers.
Kevin
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