Commit 52e6d399 authored by Thierry Reding's avatar Thierry Reding
Browse files

soc/tegra: fuse: Implement tegra_is_silicon() 



This function can be used by drivers to determine whether code is
running on silicon or on a simulation platform.

Reviewed-by: default avatarJon Hunter <jonathanh@nvidia.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 775edf78

drivers/soc/tegra/fuse/tegra-apbmisc.c

+19 −0
Original line number Diff line number Diff line
@@ -52,6 +52,25 @@ u8 tegra_get_platform(void) 
	return (tegra_read_chipid() >> 20) & 0xf;

}



bool tegra_is_silicon(void)

{

	switch (tegra_get_chip_id()) {

	case TEGRA194:

		if (tegra_get_platform() == 0)

			return true;



		return false;

	}



	/*

	 * Chips prior to Tegra194 have a different way of determining whether

	 * they are silicon or not. Since we never supported simulation on the

	 * older Tegra chips, don't bother extracting the information and just

	 * report that we're running on silicon.

	 */

	return true;

}



u32 tegra_read_straps(void)

{

	WARN(!chipid, "Tegra ABP MISC not yet available\n");

include/soc/tegra/fuse.h

+1 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
u32 tegra_read_chipid(void);

u8 tegra_get_chip_id(void);

u8 tegra_get_platform(void);

bool tegra_is_silicon(void);



enum tegra_revision {

	TEGRA_REVISION_UNKNOWN = 0,

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