From: Eddie James <eajames@linux.ibm.com>
To: linux-fsi@lists.ozlabs.org
Cc: linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org,
linux-clk@vger.kernel.org, devicetree@vger.kernel.org,
andi.shyti@kernel.org, eajames@linux.ibm.com,
alistair@popple.id.au, joel@jms.id.au, jk@ozlabs.org,
sboyd@kernel.org, mturquette@baylibre.com, robh@kernel.org,
krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org
Subject: [PATCH 28/33] i2c: fsi: Improve formatting
Date: Thu, 15 Feb 2024 16:07:54 -0600 [thread overview]
Message-ID: <20240215220759.976998-29-eajames@linux.ibm.com> (raw)
In-Reply-To: <20240215220759.976998-1-eajames@linux.ibm.com>
No functional change.
Signed-off-by: Eddie James <eajames@linux.ibm.com>
---
drivers/i2c/busses/i2c-fsi.c | 125 +++++++++++++++++------------------
1 file changed, 60 insertions(+), 65 deletions(-)
diff --git a/drivers/i2c/busses/i2c-fsi.c b/drivers/i2c/busses/i2c-fsi.c
index eaecf156ac31..bc44cad49ef2 100644
--- a/drivers/i2c/busses/i2c-fsi.c
+++ b/drivers/i2c/busses/i2c-fsi.c
@@ -148,10 +148,10 @@
struct fsi_i2c_master {
struct fsi_device *fsi;
- u8 fifo_size;
struct list_head ports;
struct mutex lock;
u32 clock_div;
+ u8 fifo_size;
};
struct fsi_i2c_port {
@@ -165,15 +165,14 @@ struct fsi_i2c_port {
static int fsi_i2c_read_reg(struct fsi_device *fsi, unsigned int reg,
u32 *data)
{
- int rc;
__be32 data_be;
+ int rc;
rc = fsi_device_read(fsi, reg, &data_be, sizeof(data_be));
if (rc)
return rc;
*data = be32_to_cpu(data_be);
-
return 0;
}
@@ -187,9 +186,11 @@ static int fsi_i2c_write_reg(struct fsi_device *fsi, unsigned int reg,
static int fsi_i2c_dev_init(struct fsi_i2c_master *i2c)
{
- int rc;
- u32 mode = I2C_MODE_ENHANCED, extended_status, watermark;
+ u32 mode = I2C_MODE_ENHANCED;
+ u32 extended_status;
u32 interrupt = 0;
+ u32 watermark;
+ int rc;
/* since we use polling, disable interrupts */
rc = fsi_i2c_write_reg(i2c->fsi, I2C_FSI_INT_MASK, &interrupt);
@@ -215,9 +216,10 @@ 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;
- u32 mode, dummy = 0;
+ u32 dummy = 0;
+ u32 mode;
+ int rc;
rc = fsi_i2c_read_reg(fsi, I2C_FSI_MODE, &mode);
if (rc)
@@ -238,7 +240,6 @@ 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;
u32 cmd = I2C_CMD_WITH_START | I2C_CMD_WITH_ADDR;
port->xfrd = 0;
@@ -252,7 +253,7 @@ static int fsi_i2c_start(struct fsi_i2c_port *port, struct i2c_msg *msg,
cmd |= FIELD_PREP(I2C_CMD_ADDR, msg->addr);
cmd |= FIELD_PREP(I2C_CMD_LEN, msg->len);
- return fsi_i2c_write_reg(i2c->fsi, I2C_FSI_CMD, &cmd);
+ return fsi_i2c_write_reg(port->master->fsi, I2C_FSI_CMD, &cmd);
}
static int fsi_i2c_get_op_bytes(int op_bytes)
@@ -268,18 +269,17 @@ static int fsi_i2c_get_op_bytes(int op_bytes)
static int fsi_i2c_write_fifo(struct fsi_i2c_port *port, struct i2c_msg *msg,
u8 fifo_count)
{
+ int bytes_to_write = port->master->fifo_size - fifo_count;
+ int bytes_remaining = msg->len - port->xfrd;
int write;
int rc;
- struct fsi_i2c_master *i2c = port->master;
- int bytes_to_write = i2c->fifo_size - fifo_count;
- int bytes_remaining = msg->len - port->xfrd;
bytes_to_write = min(bytes_to_write, bytes_remaining);
while (bytes_to_write) {
write = fsi_i2c_get_op_bytes(bytes_to_write);
- rc = fsi_device_write(i2c->fsi, I2C_FSI_FIFO,
+ rc = fsi_device_write(port->master->fsi, I2C_FSI_FIFO,
&msg->buf[port->xfrd], write);
if (rc)
return rc;
@@ -294,12 +294,11 @@ static int fsi_i2c_write_fifo(struct fsi_i2c_port *port, struct i2c_msg *msg,
static int fsi_i2c_read_fifo(struct fsi_i2c_port *port, struct i2c_msg *msg,
u8 fifo_count)
{
- int read;
- int rc;
- struct fsi_i2c_master *i2c = port->master;
- int bytes_to_read;
int xfr_remaining = msg->len - port->xfrd;
+ int bytes_to_read;
u32 dummy;
+ int read;
+ int rc;
bytes_to_read = min_t(int, fifo_count, xfr_remaining);
@@ -307,7 +306,7 @@ static int fsi_i2c_read_fifo(struct fsi_i2c_port *port, struct i2c_msg *msg,
read = fsi_i2c_get_op_bytes(bytes_to_read);
if (xfr_remaining) {
- rc = fsi_device_read(i2c->fsi, I2C_FSI_FIFO,
+ rc = fsi_device_read(port->master->fsi, I2C_FSI_FIFO,
&msg->buf[port->xfrd], read);
if (rc)
return rc;
@@ -316,8 +315,8 @@ static int fsi_i2c_read_fifo(struct fsi_i2c_port *port, struct i2c_msg *msg,
xfr_remaining -= read;
} else {
/* no more buffer but data in fifo, need to clear it */
- rc = fsi_device_read(i2c->fsi, I2C_FSI_FIFO, &dummy,
- read);
+ rc = fsi_device_read(port->master->fsi, I2C_FSI_FIFO,
+ &dummy, read);
if (rc)
return rc;
}
@@ -330,85 +329,80 @@ static int fsi_i2c_read_fifo(struct fsi_i2c_port *port, struct i2c_msg *msg,
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;
+ u32 stat;
- fsi_i2c_read_reg(i2c->fsi, I2C_FSI_STAT, &stat);
+ fsi_i2c_read_reg(port->master->fsi, I2C_FSI_STAT, &stat);
return !!(stat & I2C_STAT_SCL_IN);
}
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;
+ u32 dummy = 0;
if (val)
- fsi_i2c_write_reg(i2c->fsi, I2C_FSI_SET_SCL, &dummy);
+ fsi_i2c_write_reg(port->master->fsi, I2C_FSI_SET_SCL, &dummy);
else
- fsi_i2c_write_reg(i2c->fsi, I2C_FSI_RESET_SCL, &dummy);
+ fsi_i2c_write_reg(port->master->fsi, I2C_FSI_RESET_SCL, &dummy);
}
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;
+ u32 stat;
- fsi_i2c_read_reg(i2c->fsi, I2C_FSI_STAT, &stat);
+ fsi_i2c_read_reg(port->master->fsi, I2C_FSI_STAT, &stat);
return !!(stat & I2C_STAT_SDA_IN);
}
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;
+ u32 dummy = 0;
if (val)
- fsi_i2c_write_reg(i2c->fsi, I2C_FSI_SET_SDA, &dummy);
+ fsi_i2c_write_reg(port->master->fsi, I2C_FSI_SET_SDA, &dummy);
else
- fsi_i2c_write_reg(i2c->fsi, I2C_FSI_RESET_SDA, &dummy);
+ fsi_i2c_write_reg(port->master->fsi, I2C_FSI_RESET_SDA, &dummy);
}
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;
+ u32 mode;
+ int rc;
- rc = fsi_i2c_read_reg(i2c->fsi, I2C_FSI_MODE, &mode);
+ rc = fsi_i2c_read_reg(port->master->fsi, I2C_FSI_MODE, &mode);
if (rc)
return;
mode |= I2C_MODE_DIAG;
- fsi_i2c_write_reg(i2c->fsi, I2C_FSI_MODE, &mode);
+ fsi_i2c_write_reg(port->master->fsi, I2C_FSI_MODE, &mode);
}
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;
+ u32 mode;
+ int rc;
- rc = fsi_i2c_read_reg(i2c->fsi, I2C_FSI_MODE, &mode);
+ rc = fsi_i2c_read_reg(port->master->fsi, I2C_FSI_MODE, &mode);
if (rc)
return;
mode &= ~I2C_MODE_DIAG;
- fsi_i2c_write_reg(i2c->fsi, I2C_FSI_MODE, &mode);
+ fsi_i2c_write_reg(port->master->fsi, I2C_FSI_MODE, &mode);
}
static int fsi_i2c_reset_bus(struct fsi_i2c_master *i2c,
struct fsi_i2c_port *port)
{
+ u32 dummy = 0;
+ u32 stat;
int rc;
- u32 stat, dummy = 0;
/* force bus reset, ignore errors */
i2c_recover_bus(&port->adapter);
@@ -439,8 +433,9 @@ static int fsi_i2c_reset_bus(struct fsi_i2c_master *i2c,
static int fsi_i2c_reset_engine(struct fsi_i2c_master *i2c, u16 port)
{
+ u32 dummy = 0;
+ u32 mode;
int rc;
- u32 mode, dummy = 0;
/* reset engine */
rc = fsi_i2c_write_reg(i2c->fsi, I2C_FSI_RESET_I2C, &dummy);
@@ -476,18 +471,17 @@ static int fsi_i2c_reset_engine(struct fsi_i2c_master *i2c, u16 port)
static int fsi_i2c_abort(struct fsi_i2c_port *port, u32 status)
{
- int rc;
- unsigned long start;
+ struct fsi_i2c_master *i2c = port->master;
u32 cmd = I2C_CMD_WITH_STOP;
+ unsigned long start;
u32 stat;
- struct fsi_i2c_master *i2c = port->master;
- struct fsi_device *fsi = i2c->fsi;
+ int rc;
rc = fsi_i2c_reset_engine(i2c, port->port);
if (rc)
return rc;
- rc = fsi_i2c_read_reg(fsi, I2C_FSI_STAT, &stat);
+ rc = fsi_i2c_read_reg(i2c->fsi, I2C_FSI_STAT, &stat);
if (rc)
return rc;
@@ -503,15 +497,14 @@ static int fsi_i2c_abort(struct fsi_i2c_port *port, u32 status)
return 0;
/* write stop command */
- rc = fsi_i2c_write_reg(fsi, I2C_FSI_CMD, &cmd);
+ rc = fsi_i2c_write_reg(i2c->fsi, I2C_FSI_CMD, &cmd);
if (rc)
return rc;
/* wait until we see command complete in the master */
start = jiffies;
-
do {
- rc = fsi_i2c_read_reg(fsi, I2C_FSI_STAT, &status);
+ rc = fsi_i2c_read_reg(i2c->fsi, I2C_FSI_STAT, &status);
if (rc)
return rc;
@@ -527,8 +520,8 @@ static int fsi_i2c_abort(struct fsi_i2c_port *port, u32 status)
static int fsi_i2c_handle_status(struct fsi_i2c_port *port,
struct i2c_msg *msg, u32 status)
{
- int rc;
u8 fifo_count;
+ int rc;
if (status & I2C_STAT_ERR) {
rc = fsi_i2c_abort(port, status);
@@ -576,9 +569,9 @@ static int fsi_i2c_handle_status(struct fsi_i2c_port *port,
static int fsi_i2c_wait(struct fsi_i2c_port *port, struct i2c_msg *msg,
unsigned long timeout)
{
- u32 status = 0;
- int rc;
unsigned long start = jiffies;
+ u32 status;
+ int rc;
do {
rc = fsi_i2c_read_reg(port->master->fsi, I2C_FSI_STAT,
@@ -608,13 +601,13 @@ static int fsi_i2c_wait(struct fsi_i2c_port *port, struct i2c_msg *msg,
static int fsi_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
int num)
{
- int i, rc;
- unsigned long start_time;
struct fsi_i2c_port *port = adap->algo_data;
- struct fsi_i2c_master *master = port->master;
+ unsigned long start_time;
struct i2c_msg *msg;
+ int rc;
+ int i;
- mutex_lock(&master->lock);
+ mutex_lock(&port->master->lock);
rc = fsi_i2c_set_port(port);
if (rc)
@@ -635,7 +628,7 @@ static int fsi_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
}
unlock:
- mutex_unlock(&master->lock);
+ mutex_unlock(&port->master->lock);
return rc ? : num;
}
@@ -681,8 +674,10 @@ static int fsi_i2c_probe(struct device *dev)
struct fsi_i2c_master *i2c;
struct fsi_i2c_port *port;
struct device_node *np;
- u32 port_no, ports, stat;
+ u32 port_no;
+ u32 ports;
u32 lbus;
+ u32 stat;
int rc;
i2c = devm_kzalloc(dev, sizeof(*i2c), GFP_KERNEL);
@@ -753,14 +748,14 @@ static int fsi_i2c_probe(struct device *dev)
}
dev_set_drvdata(dev, i2c);
-
return 0;
}
static int fsi_i2c_remove(struct device *dev)
{
struct fsi_i2c_master *i2c = dev_get_drvdata(dev);
- struct fsi_i2c_port *port, *tmp;
+ struct fsi_i2c_port *port;
+ struct fsi_i2c_port *tmp;
list_for_each_entry_safe(port, tmp, &i2c->ports, list) {
list_del(&port->list);
--
2.39.3
next prev parent reply other threads:[~2024-02-15 22:08 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-15 22:07 [PATCH 00/33] fsi: Interrupt support Eddie James
2024-02-15 22:07 ` [PATCH 01/33] dt-bindings: clock: ast2600: Add FSI clock Eddie James
2024-02-16 8:07 ` Krzysztof Kozlowski
2024-02-22 5:45 ` Stephen Boyd
2024-02-15 22:07 ` [PATCH 02/33] clk: ast2600: Add FSI parent clock with correct rate Eddie James
2024-02-22 5:46 ` Stephen Boyd
2024-02-15 22:07 ` [PATCH 03/33] fsi: Move slave definitions to fsi-slave.h Eddie James
2024-02-15 22:07 ` [PATCH 04/33] fsi: Improve master indexing Eddie James
2024-02-15 22:07 ` [PATCH 05/33] fsi: Use a defined value for default echo delay Eddie James
2024-02-15 22:07 ` [PATCH 06/33] fsi: Expose master-specific local bus clock divider Eddie James
2024-02-15 22:07 ` [PATCH 07/33] ARM: dts: aspeed: p10 and tacoma: Set FSI clock frequency Eddie James
2024-02-16 8:08 ` Krzysztof Kozlowski
2024-02-16 19:14 ` Eddie James
2024-02-22 12:33 ` Joel Stanley
2024-02-15 22:07 ` [PATCH 08/33] fsi: core: Improve master read/write/error traces Eddie James
2024-02-15 22:07 ` [PATCH 09/33] fsi: core: Add slave error trace Eddie James
2024-02-15 22:07 ` [PATCH 10/33] fsi: aspeed: Add AST2700 support Eddie James
2024-02-16 8:09 ` Krzysztof Kozlowski
2024-02-16 19:18 ` Eddie James
2024-02-15 22:07 ` [PATCH 11/33] fsi: core: Add slave spinlock Eddie James
2024-02-15 22:07 ` [PATCH 12/33] fsi: core: Allow cfam device type aliases Eddie James
2024-02-20 8:31 ` Dan Carpenter
2024-02-15 22:07 ` [PATCH 13/33] fsi: core: Add common regmap master functions Eddie James
2024-02-15 22:07 ` [PATCH 14/33] fsi: hub: Use common initialization and link enable Eddie James
2024-02-15 22:07 ` [PATCH 15/33] fsi: aspeed: " Eddie James
2024-02-15 22:07 ` [PATCH 16/33] fsi: aspeed: Remove cfam reset sysfs file in error path and remove Eddie James
2024-02-15 22:07 ` [PATCH 17/33] fsi: aspeed: Refactor trace functions Eddie James
2024-02-15 22:07 ` [PATCH 18/33] fsi: aspeed: Don't clear all IRQs during OPB transfers Eddie James
2024-02-15 22:07 ` [PATCH 19/33] fsi: aspeed: Only read result register for successful read Eddie James
2024-02-15 22:07 ` [PATCH 20/33] fsi: aspeed: Switch to spinlock Eddie James
2024-02-15 22:07 ` [PATCH 21/33] fsi: aspeed: Disable relative addressing and IPOLL for cfam reset Eddie James
2024-02-15 22:07 ` [PATCH 22/33] fsi: aspeed: Use common master error handler Eddie James
2024-02-15 22:07 ` [PATCH 23/33] fsi: core: Add interrupt support Eddie James
2024-02-15 22:07 ` [PATCH 24/33] fsi: aspeed: " Eddie James
2024-02-15 22:07 ` [PATCH 25/33] fsi: hub: " Eddie James
2024-02-15 22:07 ` [PATCH 26/33] ARM: dts: aspeed: FSI " Eddie James
2024-02-16 8:11 ` Krzysztof Kozlowski
2024-02-15 22:07 ` [PATCH 27/33] i2c: fsi: Calculate clock divider from local bus frequency Eddie James
2024-02-15 22:07 ` Eddie James [this message]
2024-02-15 22:07 ` [PATCH 29/33] i2c: fsi: Change fsi_i2c_write_reg to accept data instead of a pointer Eddie James
2024-02-15 22:07 ` [PATCH 30/33] i2c: fsi: Remove list structure of ports Eddie James
2024-02-15 22:07 ` [PATCH 31/33] i2c: fsi: Define a function to check status error bits Eddie James
2024-02-15 22:07 ` [PATCH 32/33] i2c: fsi: Add boolean for skip stop command on abort Eddie James
2024-02-15 22:07 ` [PATCH 33/33] i2c: fsi: Add interrupt support Eddie James
-- strict thread matches above, loose matches on Subject: below --
2024-02-17 13:27 [PATCH 28/33] i2c: fsi: Improve formatting kernel test robot
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