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Message-ID: <ccae0209-d48d-4c5f-964d-cb384e5fd9e8@linux.ibm.com>
Date: Tue, 9 Jul 2024 09:35:03 -0500
From: Eddie James <eajames@...ux.ibm.com>
To: Wolfram Sang <wsa+renesas@...g-engineering.com>, linux-i2c@...r.kernel.org
Cc: Andi Shyti <andi.shyti@...nel.org>, openbmc@...ts.ozlabs.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 15/60] i2c: fsi: reword according to newest
specification
On 7/6/24 06:20, Wolfram Sang wrote:
> Change the wording of this driver wrt. the newest I2C v7 and SMBus 3.2
> specifications and replace "master/slave" with more appropriate terms.
Reviewed-by: Eddie James <eajames@...ux.ibm.com>
>
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
> ---
> drivers/i2c/busses/i2c-fsi.c | 56 ++++++++++++++++++------------------
> 1 file changed, 28 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-fsi.c b/drivers/i2c/busses/i2c-fsi.c
> index 10332693edf0..ae016a9431da 100644
> --- a/drivers/i2c/busses/i2c-fsi.c
> +++ b/drivers/i2c/busses/i2c-fsi.c
> @@ -1,6 +1,6 @@
> // SPDX-License-Identifier: GPL-2.0+
> /*
> - * FSI-attached I2C master algorithm
> + * FSI-attached I2C controller algorithm
> *
> * Copyright 2018 IBM Corporation
> *
> @@ -145,7 +145,7 @@
> /* choose timeout length from legacy driver; it's well tested */
> #define I2C_ABORT_TIMEOUT msecs_to_jiffies(100)
>
> -struct fsi_i2c_master {
> +struct fsi_i2c_ctrl {
> struct fsi_device *fsi;
> u8 fifo_size;
> struct list_head ports;
> @@ -155,7 +155,7 @@ struct fsi_i2c_master {
> struct fsi_i2c_port {
> struct list_head list;
> struct i2c_adapter adapter;
> - struct fsi_i2c_master *master;
> + struct fsi_i2c_ctrl *ctrl;
> u16 port;
> u16 xfrd;
> };
> @@ -183,7 +183,7 @@ static int fsi_i2c_write_reg(struct fsi_device *fsi, unsigned int reg,
> return fsi_device_write(fsi, reg, &data_be, sizeof(data_be));
> }
>
> -static int fsi_i2c_dev_init(struct fsi_i2c_master *i2c)
> +static int fsi_i2c_dev_init(struct fsi_i2c_ctrl *i2c)
> {
> int rc;
> u32 mode = I2C_MODE_ENHANCED, extended_status, watermark;
> @@ -214,7 +214,7 @@ static int fsi_i2c_dev_init(struct fsi_i2c_master *i2c)
> static int fsi_i2c_set_port(struct fsi_i2c_port *port)
> {
> int rc;
> - struct fsi_device *fsi = port->master->fsi;
> + struct fsi_device *fsi = port->ctrl->fsi;
> u32 mode, dummy = 0;
>
> rc = fsi_i2c_read_reg(fsi, I2C_FSI_MODE, &mode);
> @@ -236,7 +236,7 @@ static int fsi_i2c_set_port(struct fsi_i2c_port *port)
> static int fsi_i2c_start(struct fsi_i2c_port *port, struct i2c_msg *msg,
> bool stop)
> {
> - struct fsi_i2c_master *i2c = port->master;
> + struct fsi_i2c_ctrl *i2c = port->ctrl;
> u32 cmd = I2C_CMD_WITH_START | I2C_CMD_WITH_ADDR;
>
> port->xfrd = 0;
> @@ -268,7 +268,7 @@ static int fsi_i2c_write_fifo(struct fsi_i2c_port *port, struct i2c_msg *msg,
> {
> int write;
> int rc;
> - struct fsi_i2c_master *i2c = port->master;
> + struct fsi_i2c_ctrl *i2c = port->ctrl;
> int bytes_to_write = i2c->fifo_size - fifo_count;
> int bytes_remaining = msg->len - port->xfrd;
>
> @@ -294,7 +294,7 @@ static int fsi_i2c_read_fifo(struct fsi_i2c_port *port, struct i2c_msg *msg,
> {
> int read;
> int rc;
> - struct fsi_i2c_master *i2c = port->master;
> + struct fsi_i2c_ctrl *i2c = port->ctrl;
> int bytes_to_read;
> int xfr_remaining = msg->len - port->xfrd;
> u32 dummy;
> @@ -330,7 +330,7 @@ static int fsi_i2c_get_scl(struct i2c_adapter *adap)
> {
> u32 stat = 0;
> struct fsi_i2c_port *port = adap->algo_data;
> - struct fsi_i2c_master *i2c = port->master;
> + struct fsi_i2c_ctrl *i2c = port->ctrl;
>
> fsi_i2c_read_reg(i2c->fsi, I2C_FSI_STAT, &stat);
>
> @@ -341,7 +341,7 @@ static void fsi_i2c_set_scl(struct i2c_adapter *adap, int val)
> {
> u32 dummy = 0;
> struct fsi_i2c_port *port = adap->algo_data;
> - struct fsi_i2c_master *i2c = port->master;
> + struct fsi_i2c_ctrl *i2c = port->ctrl;
>
> if (val)
> fsi_i2c_write_reg(i2c->fsi, I2C_FSI_SET_SCL, &dummy);
> @@ -353,7 +353,7 @@ static int fsi_i2c_get_sda(struct i2c_adapter *adap)
> {
> u32 stat = 0;
> struct fsi_i2c_port *port = adap->algo_data;
> - struct fsi_i2c_master *i2c = port->master;
> + struct fsi_i2c_ctrl *i2c = port->ctrl;
>
> fsi_i2c_read_reg(i2c->fsi, I2C_FSI_STAT, &stat);
>
> @@ -364,7 +364,7 @@ static void fsi_i2c_set_sda(struct i2c_adapter *adap, int val)
> {
> u32 dummy = 0;
> struct fsi_i2c_port *port = adap->algo_data;
> - struct fsi_i2c_master *i2c = port->master;
> + struct fsi_i2c_ctrl *i2c = port->ctrl;
>
> if (val)
> fsi_i2c_write_reg(i2c->fsi, I2C_FSI_SET_SDA, &dummy);
> @@ -377,7 +377,7 @@ static void fsi_i2c_prepare_recovery(struct i2c_adapter *adap)
> int rc;
> u32 mode;
> struct fsi_i2c_port *port = adap->algo_data;
> - struct fsi_i2c_master *i2c = port->master;
> + struct fsi_i2c_ctrl *i2c = port->ctrl;
>
> rc = fsi_i2c_read_reg(i2c->fsi, I2C_FSI_MODE, &mode);
> if (rc)
> @@ -392,7 +392,7 @@ static void fsi_i2c_unprepare_recovery(struct i2c_adapter *adap)
> int rc;
> u32 mode;
> struct fsi_i2c_port *port = adap->algo_data;
> - struct fsi_i2c_master *i2c = port->master;
> + struct fsi_i2c_ctrl *i2c = port->ctrl;
>
> rc = fsi_i2c_read_reg(i2c->fsi, I2C_FSI_MODE, &mode);
> if (rc)
> @@ -402,7 +402,7 @@ static void fsi_i2c_unprepare_recovery(struct i2c_adapter *adap)
> fsi_i2c_write_reg(i2c->fsi, I2C_FSI_MODE, &mode);
> }
>
> -static int fsi_i2c_reset_bus(struct fsi_i2c_master *i2c,
> +static int fsi_i2c_reset_bus(struct fsi_i2c_ctrl *i2c,
> struct fsi_i2c_port *port)
> {
> int rc;
> @@ -435,7 +435,7 @@ static int fsi_i2c_reset_bus(struct fsi_i2c_master *i2c,
> return fsi_i2c_dev_init(i2c);
> }
>
> -static int fsi_i2c_reset_engine(struct fsi_i2c_master *i2c, u16 port)
> +static int fsi_i2c_reset_engine(struct fsi_i2c_ctrl *i2c, u16 port)
> {
> int rc;
> u32 mode, dummy = 0;
> @@ -478,7 +478,7 @@ static int fsi_i2c_abort(struct fsi_i2c_port *port, u32 status)
> unsigned long start;
> u32 cmd = I2C_CMD_WITH_STOP;
> u32 stat;
> - struct fsi_i2c_master *i2c = port->master;
> + struct fsi_i2c_ctrl *i2c = port->ctrl;
> struct fsi_device *fsi = i2c->fsi;
>
> rc = fsi_i2c_reset_engine(i2c, port->port);
> @@ -505,7 +505,7 @@ static int fsi_i2c_abort(struct fsi_i2c_port *port, u32 status)
> if (rc)
> return rc;
>
> - /* wait until we see command complete in the master */
> + /* wait until we see command complete in the controller */
> start = jiffies;
>
> do {
> @@ -579,7 +579,7 @@ static int fsi_i2c_wait(struct fsi_i2c_port *port, struct i2c_msg *msg,
> unsigned long start = jiffies;
>
> do {
> - rc = fsi_i2c_read_reg(port->master->fsi, I2C_FSI_STAT,
> + rc = fsi_i2c_read_reg(port->ctrl->fsi, I2C_FSI_STAT,
> &status);
> if (rc)
> return rc;
> @@ -609,10 +609,10 @@ static int fsi_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
> int i, rc;
> unsigned long start_time;
> struct fsi_i2c_port *port = adap->algo_data;
> - struct fsi_i2c_master *master = port->master;
> + struct fsi_i2c_ctrl *ctrl = port->ctrl;
> struct i2c_msg *msg;
>
> - mutex_lock(&master->lock);
> + mutex_lock(&ctrl->lock);
>
> rc = fsi_i2c_set_port(port);
> if (rc)
> @@ -633,7 +633,7 @@ static int fsi_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
> }
>
> unlock:
> - mutex_unlock(&master->lock);
> + mutex_unlock(&ctrl->lock);
> return rc ? : num;
> }
>
> @@ -654,7 +654,7 @@ static struct i2c_bus_recovery_info fsi_i2c_bus_recovery_info = {
> };
>
> static const struct i2c_algorithm fsi_i2c_algorithm = {
> - .master_xfer = fsi_i2c_xfer,
> + .xfer = fsi_i2c_xfer,
> .functionality = fsi_i2c_functionality,
> };
>
> @@ -676,7 +676,7 @@ static struct device_node *fsi_i2c_find_port_of_node(struct device_node *fsi,
>
> static int fsi_i2c_probe(struct device *dev)
> {
> - struct fsi_i2c_master *i2c;
> + struct fsi_i2c_ctrl *i2c;
> struct fsi_i2c_port *port;
> struct device_node *np;
> u32 port_no, ports, stat;
> @@ -699,7 +699,7 @@ static int fsi_i2c_probe(struct device *dev)
> return rc;
>
> ports = FIELD_GET(I2C_STAT_MAX_PORT, stat) + 1;
> - dev_dbg(dev, "I2C master has %d ports\n", ports);
> + dev_dbg(dev, "I2C controller has %d ports\n", ports);
>
> for (port_no = 0; port_no < ports; port_no++) {
> np = fsi_i2c_find_port_of_node(dev->of_node, port_no);
> @@ -712,7 +712,7 @@ static int fsi_i2c_probe(struct device *dev)
> break;
> }
>
> - port->master = i2c;
> + port->ctrl = i2c;
> port->port = port_no;
>
> port->adapter.owner = THIS_MODULE;
> @@ -742,7 +742,7 @@ static int fsi_i2c_probe(struct device *dev)
>
> static int fsi_i2c_remove(struct device *dev)
> {
> - struct fsi_i2c_master *i2c = dev_get_drvdata(dev);
> + struct fsi_i2c_ctrl *i2c = dev_get_drvdata(dev);
> struct fsi_i2c_port *port, *tmp;
>
> list_for_each_entry_safe(port, tmp, &i2c->ports, list) {
> @@ -772,5 +772,5 @@ static struct fsi_driver fsi_i2c_driver = {
> module_fsi_driver(fsi_i2c_driver);
>
> MODULE_AUTHOR("Eddie James <eajames@...ibm.com>");
> -MODULE_DESCRIPTION("FSI attached I2C master");
> +MODULE_DESCRIPTION("FSI attached I2C controller");
> MODULE_LICENSE("GPL");
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