diff options
Diffstat (limited to 'drivers/char/tpm/tpm_i2c_nuvoton.c')
| -rw-r--r-- | drivers/char/tpm/tpm_i2c_nuvoton.c | 57 |
1 files changed, 18 insertions, 39 deletions
diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c index 217f7f1cbde8..d44903b29929 100644 --- a/drivers/char/tpm/tpm_i2c_nuvoton.c +++ b/drivers/char/tpm/tpm_i2c_nuvoton.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /****************************************************************************** * Nuvoton TPM I2C Device Driver Interface for WPCT301/NPCT501/NPCT6XX, * based on the TCG TPM Interface Spec version 1.2. @@ -8,19 +9,6 @@ * Copyright (C) 2013, Obsidian Research Corp. * Jason Gunthorpe <jgunthorpe@obsidianresearch.com> * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see http://www.gnu.org/licenses/>. - * * Nuvoton contact information: APC.Support@nuvoton.com *****************************************************************************/ @@ -31,18 +19,17 @@ #include <linux/interrupt.h> #include <linux/wait.h> #include <linux/i2c.h> -#include <linux/of_device.h> +#include <linux/of.h> +#include <linux/property.h> #include "tpm.h" /* I2C interface offsets */ -#define TPM_STS 0x00 -#define TPM_BURST_COUNT 0x01 -#define TPM_DATA_FIFO_W 0x20 -#define TPM_DATA_FIFO_R 0x40 -#define TPM_VID_DID_RID 0x60 -/* TPM command header size */ -#define TPM_HEADER_SIZE 10 -#define TPM_RETRY 5 +#define TPM_STS 0x00 +#define TPM_BURST_COUNT 0x01 +#define TPM_DATA_FIFO_W 0x20 +#define TPM_DATA_FIFO_R 0x40 +#define TPM_VID_DID_RID 0x60 +#define TPM_I2C_RETRIES 5 /* * I2C bus device maximum buffer size w/o counting I2C address or command * i.e. max size required for I2C write is 34 = addr, command, 32 bytes data @@ -292,7 +279,7 @@ static int i2c_nuvoton_recv(struct tpm_chip *chip, u8 *buf, size_t count) dev_err(dev, "%s() count < header size\n", __func__); return -EIO; } - for (retries = 0; retries < TPM_RETRY; retries++) { + for (retries = 0; retries < TPM_I2C_RETRIES; retries++) { if (retries > 0) { /* if this is not the first trial, set responseRetry */ i2c_nuvoton_write_status(client, @@ -363,7 +350,8 @@ static int i2c_nuvoton_recv(struct tpm_chip *chip, u8 *buf, size_t count) * tpm.c can skip polling for the data to be available as the interrupt is * waited for here */ -static int i2c_nuvoton_send(struct tpm_chip *chip, u8 *buf, size_t len) +static int i2c_nuvoton_send(struct tpm_chip *chip, u8 *buf, size_t bufsiz, + size_t len) { struct priv_data *priv = dev_get_drvdata(&chip->dev); struct device *dev = chip->dev.parent; @@ -467,7 +455,7 @@ static int i2c_nuvoton_send(struct tpm_chip *chip, u8 *buf, size_t len) } dev_dbg(dev, "%s() -> %zd\n", __func__, len); - return len; + return 0; } static bool i2c_nuvoton_req_canceled(struct tpm_chip *chip, u8 status) @@ -536,8 +524,7 @@ static int get_vid(struct i2c_client *client, u32 *res) return 0; } -static int i2c_nuvoton_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int i2c_nuvoton_probe(struct i2c_client *client) { int rc; struct tpm_chip *chip; @@ -560,15 +547,8 @@ static int i2c_nuvoton_probe(struct i2c_client *client, if (!priv) return -ENOMEM; - if (dev->of_node) { - const struct of_device_id *of_id; - - of_id = of_match_device(dev->driver->of_match_table, dev); - if (of_id && of_id->data == OF_IS_TPM2) - chip->flags |= TPM_CHIP_FLAG_TPM2; - } else - if (id->driver_data == I2C_IS_TPM2) - chip->flags |= TPM_CHIP_FLAG_TPM2; + if (i2c_get_match_data(client)) + chip->flags |= TPM_CHIP_FLAG_TPM2; init_waitqueue_head(&priv->read_queue); @@ -636,12 +616,11 @@ static int i2c_nuvoton_probe(struct i2c_client *client, return tpm_chip_register(chip); } -static int i2c_nuvoton_remove(struct i2c_client *client) +static void i2c_nuvoton_remove(struct i2c_client *client) { struct tpm_chip *chip = i2c_get_clientdata(client); tpm_chip_unregister(chip); - return 0; } static const struct i2c_device_id i2c_nuvoton_id[] = { @@ -676,6 +655,6 @@ static struct i2c_driver i2c_nuvoton_driver = { module_i2c_driver(i2c_nuvoton_driver); -MODULE_AUTHOR("Dan Morav (dan.morav@nuvoton.com)"); +MODULE_AUTHOR("Dan Morav <dan.morav@nuvoton.com>"); MODULE_DESCRIPTION("Nuvoton TPM I2C Driver"); MODULE_LICENSE("GPL"); |