[PATCH v2] tpm: Allow tpm_tis drivers to set hwrng quality.

[Louis Collard]

Adds plumbing required for drivers based on tpm_tis to set hwrng quality.

Signed-off-by: Louis Collard <louiscoll...@chromium.org>
---
Changes since v1:
- based on (hopefully!) correct git tree

 drivers/char/tpm/tpm_tis_core.c | 2 ++
 drivers/char/tpm/tpm_tis_core.h | 1 +
 2 files changed, 3 insertions(+)

diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index 8b46aaa9e049..d2345d9fd7b5 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -875,6 +875,8 @@ int tpm_tis_core_init(struct device *dev, struct 
tpm_tis_data *priv, int irq,
        chip->acpi_dev_handle = acpi_dev_handle;
 #endif
 
+       chip->hwrng.quality = priv->rng_quality;
+
        /* Maximum timeouts */
        chip->timeout_a = msecs_to_jiffies(TIS_TIMEOUT_A_MAX);
        chip->timeout_b = msecs_to_jiffies(TIS_TIMEOUT_B_MAX);
diff --git a/drivers/char/tpm/tpm_tis_core.h b/drivers/char/tpm/tpm_tis_core.h
index f6e1dbe212a7..f48125f1e6e0 100644
--- a/drivers/char/tpm/tpm_tis_core.h
+++ b/drivers/char/tpm/tpm_tis_core.h
@@ -99,6 +99,7 @@ struct tpm_tis_data {
        wait_queue_head_t int_queue;
        wait_queue_head_t read_queue;
        const struct tpm_tis_phy_ops *phy_ops;
+       unsigned short rng_quality;
 };
 
 struct tpm_tis_phy_ops {
-- 
2.13.5