From patchwork Mon Jan 27 05:05:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Glass X-Patchwork-Id: 240154 List-Id: U-Boot discussion From: sjg at chromium.org (Simon Glass) Date: Sun, 26 Jan 2020 22:05:10 -0700 Subject: [PATCH 003/108] tpm: cr50: Release locality on exit In-Reply-To: <20200127050655.170614-1-sjg@chromium.org> References: <20200127050655.170614-1-sjg@chromium.org> Message-ID: <20200126220508.3.Ic7bc756f1622775532c4536a2dfd4ee783ee4a35@changeid> At present the cr50 driver claims the locality and does not release it for Linux. This causes problems. Fix this by tracking what is claimed, and adding a 'remove' method. Signed-off-by: Simon Glass --- drivers/tpm/cr50_i2c.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/tpm/cr50_i2c.c b/drivers/tpm/cr50_i2c.c index 880da37835..42faee4d9b 100644 --- a/drivers/tpm/cr50_i2c.c +++ b/drivers/tpm/cr50_i2c.c @@ -208,7 +208,7 @@ static int release_locality(struct udevice *dev, int force) cr50_i2c_write(dev, addr, &buf, 1); } - priv->locality = 0; + priv->locality = -1; return 0; } @@ -500,6 +500,7 @@ static int process_reset(struct udevice *dev) static int claim_locality(struct udevice *dev, int loc) { const u8 mask = TPM_ACCESS_VALID | TPM_ACCESS_ACTIVE_LOCALITY; + struct cr50_priv *priv = dev_get_priv(dev); u8 access; int ret; @@ -526,6 +527,7 @@ static int claim_locality(struct udevice *dev, int loc) return -EPERM; } log_info("Claimed locality %d\n", loc); + priv->locality = loc; return 0; } @@ -560,7 +562,11 @@ static int cr50_i2c_open(struct udevice *dev) static int cr50_i2c_cleanup(struct udevice *dev) { - release_locality(dev, 1); + struct cr50_priv *priv = dev_get_priv(dev); + + printf("%s: cleanup %d\n", __func__, priv->locality); + if (priv->locality != -1) + release_locality(dev, 1); return 0; } @@ -632,6 +638,7 @@ static int cr50_i2c_probe(struct udevice *dev) return log_msg_ret("vendor-id", -EXDEV); } priv->vendor = vendor; + priv->locality = -1; return 0; } @@ -656,5 +663,7 @@ U_BOOT_DRIVER(cr50_i2c) = { .ops = &cr50_i2c_ops, .ofdata_to_platdata = cr50_i2c_ofdata_to_platdata, .probe = cr50_i2c_probe, + .remove = cr50_i2c_cleanup, .priv_auto_alloc_size = sizeof(struct cr50_priv), + .flags = DM_FLAG_OS_PREPARE, };