Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-10 14:11:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

i2c: uniphier-f: reword according to newest specification

Browse Source 
Change the wording of this driver wrt. the newest I2C v7 and SMBus 3.2
specifications and replace "master/slave" with more appropriate terms.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
This commit is contained in:
Wolfram Sang 2024-07-06 13:20:53 +02:00 committed by Andi Shyti
parent 664e69d2e5
commit f872d28500
1 changed files with 12 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
drivers/i2c/busses/i2c-uniphier-f.c
View File

@ -12,15 +12,15 @@
#include <linux/platform_device.h>
#define UNIPHIER_FI2C_CR 0x00 /* control register */
#define UNIPHIER_FI2C_CR_MST BIT(3) /* master mode */
#define UNIPHIER_FI2C_CR_MST BIT(3) /* controller mode */
#define UNIPHIER_FI2C_CR_STA BIT(2) /* start condition */
#define UNIPHIER_FI2C_CR_STO BIT(1) /* stop condition */
#define UNIPHIER_FI2C_CR_NACK BIT(0) /* do not return ACK */
#define UNIPHIER_FI2C_DTTX 0x04 /* TX FIFO */
#define UNIPHIER_FI2C_DTTX_CMD BIT(8) /* send command (slave addr) */
#define UNIPHIER_FI2C_DTTX_CMD BIT(8) /* send command (target addr) */
#define UNIPHIER_FI2C_DTTX_RD BIT(0) /* read transaction */
#define UNIPHIER_FI2C_DTRX 0x04 /* RX FIFO */
#define UNIPHIER_FI2C_SLAD 0x0c /* slave address */
#define UNIPHIER_FI2C_SLAD 0x0c /* target address */
#define UNIPHIER_FI2C_CYC 0x10 /* clock cycle control */
#define UNIPHIER_FI2C_LCTL 0x14 /* clock low period control */
#define UNIPHIER_FI2C_SSUT 0x18 /* restart/stop setup time control */
@ -96,7 +96,7 @@ static void uniphier_fi2c_fill_txfifo(struct uniphier_fi2c_priv *priv,
int fifo_space = UNIPHIER_FI2C_FIFO_SIZE;
/*
* TX-FIFO stores slave address in it for the first access.
* TX-FIFO stores target address in it for the first access.
* Decrement the counter.
*/
if (first)
@ -252,7 +252,7 @@ static void uniphier_fi2c_tx_init(struct uniphier_fi2c_priv *priv, u16 addr,
/* do not use TX byte counter */
writel(0, priv->membase + UNIPHIER_FI2C_TBC);
/* set slave address */
/* set target address */
writel(UNIPHIER_FI2C_DTTX_CMD | addr << 1,
priv->membase + UNIPHIER_FI2C_DTTX);
/*
@ -288,7 +288,7 @@ static void uniphier_fi2c_rx_init(struct uniphier_fi2c_priv *priv, u16 addr)
uniphier_fi2c_set_irqs(priv);
/* set slave address with RD bit */
/* set target address with RD bit */
writel(UNIPHIER_FI2C_DTTX_CMD | UNIPHIER_FI2C_DTTX_RD | addr << 1,
priv->membase + UNIPHIER_FI2C_DTTX);
}
@ -310,9 +310,8 @@ static void uniphier_fi2c_recover(struct uniphier_fi2c_priv *priv)
i2c_recover_bus(&priv->adap);
}
static int uniphier_fi2c_master_xfer_one(struct i2c_adapter *adap,
struct i2c_msg *msg, bool repeat,
bool stop)
static int uniphier_fi2c_xfer_one(struct i2c_adapter *adap, struct i2c_msg *msg,
bool repeat, bool stop)
{
struct uniphier_fi2c_priv *priv = i2c_get_adapdata(adap);
bool is_read = msg->flags & I2C_M_RD;
@ -340,7 +339,7 @@ static int uniphier_fi2c_master_xfer_one(struct i2c_adapter *adap,
uniphier_fi2c_tx_init(priv, msg->addr, repeat);
/*
* For a repeated START condition, writing a slave address to the FIFO
* For a repeated START condition, writing a target address to the FIFO
* kicks the controller. So, the UNIPHIER_FI2C_CR register should be
* written only for a non-repeated START condition.
*/
@ -403,8 +402,7 @@ static int uniphier_fi2c_check_bus_busy(struct i2c_adapter *adap)
return 0;
}
static int uniphier_fi2c_master_xfer(struct i2c_adapter *adap,
struct i2c_msg *msgs, int num)
static int uniphier_fi2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
{
struct i2c_msg *msg, *emsg = msgs + num;
bool repeat = false;
@ -418,7 +416,7 @@ static int uniphier_fi2c_master_xfer(struct i2c_adapter *adap,
/* Emit STOP if it is the last message or I2C_M_STOP is set. */
bool stop = (msg + 1 == emsg) || (msg->flags & I2C_M_STOP);
ret = uniphier_fi2c_master_xfer_one(adap, msg, repeat, stop);
ret = uniphier_fi2c_xfer_one(adap, msg, repeat, stop);
if (ret)
return ret;
@ -434,7 +432,7 @@ static u32 uniphier_fi2c_functionality(struct i2c_adapter *adap)
}
static const struct i2c_algorithm uniphier_fi2c_algo = {
.master_xfer = uniphier_fi2c_master_xfer,
.xfer = uniphier_fi2c_xfer,
.functionality = uniphier_fi2c_functionality,
};