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| author | Paul Walmsley <paul@pwsan.com> | 2015-06-04 21:33:48 +0200 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2015-08-13 16:07:52 +0200 |
| commit | 3c01cf3befa66cc21f06672685cf59a53056887a (patch) | |
| tree | 0dc2664bc3b5851928b2e4eef74e9214820015e7 /drivers/memory/tegra/mc.c | |
| parent | memory: tegra: Expose supported rates via debugfs (diff) | |
| download | linux-3c01cf3befa66cc21f06672685cf59a53056887a.tar.xz linux-3c01cf3befa66cc21f06672685cf59a53056887a.zip | |
memory: tegra: Add support for a variable-size client ID bitfield
Recent versions of the Tegra MC hardware extend the size of the client
ID bitfield in the MC_ERR_STATUS register by one bit. While one could
simply extend the bitfield for older hardware, that would allow data
from reserved bits into the driver code, which is generally a bad idea
on principle. So this patch instead passes in the client ID mask from
from the per-SoC MC data.
There's no MC support for T210 (yet), but when that support winds up
in the kernel, the appropriate soc->client_id_mask value for that chip
will be 0xff.
Based on an original patch by David Ung <davidu@nvidia.com>.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Paul Walmsley <pwalmsley@nvidia.com>
Cc: Thierry Reding <treding@nvidia.com>
Cc: David Ung <davidu@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/memory/tegra/mc.c')
| -rw-r--r-- | drivers/memory/tegra/mc.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c index c71ede67e6c8..5d10c9285f34 100644 --- a/drivers/memory/tegra/mc.c +++ b/drivers/memory/tegra/mc.c @@ -42,7 +42,6 @@ #define MC_ERR_STATUS_ADR_HI_MASK 0x3 #define MC_ERR_STATUS_SECURITY (1 << 17) #define MC_ERR_STATUS_RW (1 << 16) -#define MC_ERR_STATUS_CLIENT_MASK 0x7f #define MC_ERR_ADR 0x0c @@ -283,7 +282,7 @@ static irqreturn_t tegra_mc_irq(int irq, void *data) else secure = ""; - id = value & MC_ERR_STATUS_CLIENT_MASK; + id = value & mc->soc->client_id_mask; for (i = 0; i < mc->soc->num_clients; i++) { if (mc->soc->clients[i].id == id) { @@ -410,6 +409,8 @@ static int tegra_mc_probe(struct platform_device *pdev) return err; } + WARN(!mc->soc->client_id_mask, "Missing client ID mask for this SoC\n"); + value = MC_INT_DECERR_MTS | MC_INT_SECERR_SEC | MC_INT_DECERR_VPR | MC_INT_INVALID_APB_ASID_UPDATE | MC_INT_INVALID_SMMU_PAGE | MC_INT_SECURITY_VIOLATION | MC_INT_DECERR_EMEM; |