diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:18:06 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:18:06 +0000 |
commit | 638a9e433ecd61e64761352dbec1fa4f5874c941 (patch) | |
tree | fdbff74a238d7a5a7d1cef071b7230bc064b9f25 /drivers/crypto/atmel-sha204a.c | |
parent | Releasing progress-linux version 6.9.12-1~progress7.99u1. (diff) | |
download | linux-638a9e433ecd61e64761352dbec1fa4f5874c941.tar.xz linux-638a9e433ecd61e64761352dbec1fa4f5874c941.zip |
Merging upstream version 6.10.3.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/crypto/atmel-sha204a.c')
-rw-r--r-- | drivers/crypto/atmel-sha204a.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/drivers/crypto/atmel-sha204a.c b/drivers/crypto/atmel-sha204a.c index c77f482d2a..2034f60315 100644 --- a/drivers/crypto/atmel-sha204a.c +++ b/drivers/crypto/atmel-sha204a.c @@ -91,6 +91,62 @@ static int atmel_sha204a_rng_read(struct hwrng *rng, void *data, size_t max, return max; } +static int atmel_sha204a_otp_read(struct i2c_client *client, u16 addr, u8 *otp) +{ + struct atmel_i2c_cmd cmd; + int ret = -1; + + if (atmel_i2c_init_read_otp_cmd(&cmd, addr) < 0) { + dev_err(&client->dev, "failed, invalid otp address %04X\n", + addr); + return ret; + } + + ret = atmel_i2c_send_receive(client, &cmd); + + if (cmd.data[0] == 0xff) { + dev_err(&client->dev, "failed, device not ready\n"); + return -EINVAL; + } + + memcpy(otp, cmd.data+1, 4); + + return ret; +} + +static ssize_t otp_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + u16 addr; + u8 otp[OTP_ZONE_SIZE]; + char *str = buf; + struct i2c_client *client = to_i2c_client(dev); + int i; + + for (addr = 0; addr < OTP_ZONE_SIZE/4; addr++) { + if (atmel_sha204a_otp_read(client, addr, otp + addr * 4) < 0) { + dev_err(dev, "failed to read otp zone\n"); + break; + } + } + + for (i = 0; i < addr*2; i++) + str += sprintf(str, "%02X", otp[i]); + str += sprintf(str, "\n"); + return str - buf; +} +static DEVICE_ATTR_RO(otp); + +static struct attribute *atmel_sha204a_attrs[] = { + &dev_attr_otp.attr, + NULL +}; + +static const struct attribute_group atmel_sha204a_groups = { + .name = "atsha204a", + .attrs = atmel_sha204a_attrs, +}; + static int atmel_sha204a_probe(struct i2c_client *client) { struct atmel_i2c_client_priv *i2c_priv; @@ -111,6 +167,16 @@ static int atmel_sha204a_probe(struct i2c_client *client) if (ret) dev_warn(&client->dev, "failed to register RNG (%d)\n", ret); + /* otp read out */ + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) + return -ENODEV; + + ret = sysfs_create_group(&client->dev.kobj, &atmel_sha204a_groups); + if (ret) { + dev_err(&client->dev, "failed to register sysfs entry\n"); + return ret; + } + return ret; } @@ -123,6 +189,8 @@ static void atmel_sha204a_remove(struct i2c_client *client) return; } + sysfs_remove_group(&client->dev.kobj, &atmel_sha204a_groups); + kfree((void *)i2c_priv->hwrng.priv); } |