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Message-ID: <20250927041400.172949-2-chiru.cezar.89@gmail.com>
Date: Sat, 27 Sep 2025 07:13:58 +0300
From: Cezar Chiru <chiru.cezar.89@...il.com>
To: wsa+renesas@...g-engineering.com,
andi.shyti@...nel.org
Cc: linux-i2c@...r.kernel.org,
linux-kernel@...r.kernel.org,
Cezar Chiru <chiru.cezar.89@...il.com>
Subject: [PATCH v6 1/3] i2c: pcf8584: Remove debug macros from i2c-algo-pcf.c
Remove debug macros and printk and dev_debg function calls from file
as no change was done for 16 years.
Request by I2C SUBSYSTEM maintainer Wolfram Sang.
Signed-off-by: Cezar Chiru <chiru.cezar.89@...il.com>
---
drivers/i2c/algos/i2c-algo-pcf.c | 59 --------------------------------
1 file changed, 59 deletions(-)
diff --git a/drivers/i2c/algos/i2c-algo-pcf.c b/drivers/i2c/algos/i2c-algo-pcf.c
index fd563e845d4b..7e2d8ff33d75 100644
--- a/drivers/i2c/algos/i2c-algo-pcf.c
+++ b/drivers/i2c/algos/i2c-algo-pcf.c
@@ -23,17 +23,8 @@
#include "i2c-algo-pcf.h"
-#define DEB2(x) if (i2c_debug >= 2) x
-#define DEB3(x) if (i2c_debug >= 3) x /* print several statistical values */
-#define DEBPROTO(x) if (i2c_debug >= 9) x;
- /* debug the protocol by showing transferred bits */
#define DEF_TIMEOUT 16
-/*
- * module parameters:
- */
-static int i2c_debug;
-
/* setting states on the bus with the right timing: */
#define set_pcf(adap, ctl, val) adap->setpcf(adap->data, ctl, val)
@@ -47,27 +38,21 @@ static int i2c_debug;
static void i2c_start(struct i2c_algo_pcf_data *adap)
{
- DEBPROTO(printk(KERN_DEBUG "S "));
set_pcf(adap, 1, I2C_PCF_START);
}
static void i2c_repstart(struct i2c_algo_pcf_data *adap)
{
- DEBPROTO(printk(" Sr "));
set_pcf(adap, 1, I2C_PCF_REPSTART);
}
static void i2c_stop(struct i2c_algo_pcf_data *adap)
{
- DEBPROTO(printk("P\n"));
set_pcf(adap, 1, I2C_PCF_STOP);
}
static void handle_lab(struct i2c_algo_pcf_data *adap, const int *status)
{
- DEB2(printk(KERN_INFO
- "i2c-algo-pcf.o: lost arbitration (CSR 0x%02x)\n",
- *status));
/*
* Cleanup from LAB -- reset and enable ESO.
* This resets the PCF8584; since we've lost the bus, no
@@ -88,9 +73,6 @@ static void handle_lab(struct i2c_algo_pcf_data *adap, const int *status)
if (adap->lab_mdelay)
mdelay(adap->lab_mdelay);
- DEB2(printk(KERN_INFO
- "i2c-algo-pcf.o: reset LAB condition (CSR 0x%02x)\n",
- get_pcf(adap, 1)));
}
static int wait_for_bb(struct i2c_algo_pcf_data *adap)
@@ -151,9 +133,6 @@ static int pcf_init_8584 (struct i2c_algo_pcf_data *adap)
{
unsigned char temp;
- DEB3(printk(KERN_DEBUG "i2c-algo-pcf.o: PCF state 0x%02x\n",
- get_pcf(adap, 1)));
-
/* S1=0x80: S0 selected, serial interface off */
set_pcf(adap, 1, I2C_PCF_PIN);
/*
@@ -161,7 +140,6 @@ static int pcf_init_8584 (struct i2c_algo_pcf_data *adap)
* PCF8584 does that when ESO is zero
*/
if (((temp = get_pcf(adap, 1)) & 0x7f) != (0)) {
- DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't select S0 (0x%02x).\n", temp));
return -ENXIO; /* definitely not PCF8584 */
}
@@ -169,7 +147,6 @@ static int pcf_init_8584 (struct i2c_algo_pcf_data *adap)
i2c_outb(adap, get_own(adap));
/* check it's really written */
if ((temp = i2c_inb(adap)) != get_own(adap)) {
- DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't set S0 (0x%02x).\n", temp));
return -ENXIO;
}
@@ -177,7 +154,6 @@ static int pcf_init_8584 (struct i2c_algo_pcf_data *adap)
set_pcf(adap, 1, I2C_PCF_PIN | I2C_PCF_ES1);
/* check to see S2 now selected */
if (((temp = get_pcf(adap, 1)) & 0x7f) != I2C_PCF_ES1) {
- DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't select S2 (0x%02x).\n", temp));
return -ENXIO;
}
@@ -185,7 +161,6 @@ static int pcf_init_8584 (struct i2c_algo_pcf_data *adap)
i2c_outb(adap, get_clock(adap));
/* check it's really written, the only 5 lowest bits does matter */
if (((temp = i2c_inb(adap)) & 0x1f) != get_clock(adap)) {
- DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't set S2 (0x%02x).\n", temp));
return -ENXIO;
}
@@ -194,7 +169,6 @@ static int pcf_init_8584 (struct i2c_algo_pcf_data *adap)
/* check to see PCF is really idled and we can access status register */
if ((temp = get_pcf(adap, 1)) != (I2C_PCF_PIN | I2C_PCF_BB)) {
- DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't select S1` (0x%02x).\n", temp));
return -ENXIO;
}
@@ -210,8 +184,6 @@ static int pcf_sendbytes(struct i2c_adapter *i2c_adap, const char *buf,
int wrcount, status, timeout;
for (wrcount=0; wrcount<count; ++wrcount) {
- DEB2(dev_dbg(&i2c_adap->dev, "i2c_write: writing %2.2X\n",
- buf[wrcount] & 0xff));
i2c_outb(adap, buf[wrcount]);
timeout = wait_for_pin(adap, &status);
if (timeout) {
@@ -307,8 +279,6 @@ static int pcf_xfer(struct i2c_adapter *i2c_adap,
/* Check for bus busy */
timeout = wait_for_bb(adap);
if (timeout) {
- DEB2(printk(KERN_ERR "i2c-algo-pcf.o: "
- "Timeout waiting for BB in pcf_xfer\n");)
i = -EIO;
goto out;
}
@@ -316,10 +286,6 @@ static int pcf_xfer(struct i2c_adapter *i2c_adap,
for (i = 0;ret >= 0 && i < num; i++) {
pmsg = &msgs[i];
- DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: Doing %s %d bytes to 0x%02x - %d of %d messages\n",
- str_read_write(pmsg->flags & I2C_M_RD),
- pmsg->len, pmsg->addr, i + 1, num);)
-
ret = pcf_doAddress(adap, pmsg);
/* Send START */
@@ -335,8 +301,6 @@ static int pcf_xfer(struct i2c_adapter *i2c_adap,
goto out;
}
i2c_stop(adap);
- DEB2(printk(KERN_ERR "i2c-algo-pcf.o: Timeout waiting "
- "for PIN(1) in pcf_xfer\n");)
i = -EREMOTEIO;
goto out;
}
@@ -344,34 +308,17 @@ static int pcf_xfer(struct i2c_adapter *i2c_adap,
/* Check LRB (last rcvd bit - slave ack) */
if (status & I2C_PCF_LRB) {
i2c_stop(adap);
- DEB2(printk(KERN_ERR "i2c-algo-pcf.o: No LRB(1) in pcf_xfer\n");)
i = -EREMOTEIO;
goto out;
}
- DEB3(printk(KERN_DEBUG "i2c-algo-pcf.o: Msg %d, addr=0x%x, flags=0x%x, len=%d\n",
- i, msgs[i].addr, msgs[i].flags, msgs[i].len);)
if (pmsg->flags & I2C_M_RD) {
ret = pcf_readbytes(i2c_adap, pmsg->buf, pmsg->len,
(i + 1 == num));
-
- if (ret != pmsg->len) {
- DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: fail: "
- "only read %d bytes.\n",ret));
- } else {
- DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: read %d bytes.\n",ret));
- }
} else {
ret = pcf_sendbytes(i2c_adap, pmsg->buf, pmsg->len,
(i + 1 == num));
-
- if (ret != pmsg->len) {
- DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: fail: "
- "only wrote %d bytes.\n",ret));
- } else {
- DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: wrote %d bytes.\n",ret));
- }
}
}
@@ -401,8 +348,6 @@ int i2c_pcf_add_bus(struct i2c_adapter *adap)
struct i2c_algo_pcf_data *pcf_adap = adap->algo_data;
int rval;
- DEB2(dev_dbg(&adap->dev, "hw routines registered.\n"));
-
/* register new adapter to i2c module... */
adap->algo = &pcf_algo;
@@ -418,7 +363,3 @@ EXPORT_SYMBOL(i2c_pcf_add_bus);
MODULE_AUTHOR("Hans Berglund <hb@...cetec.no>");
MODULE_DESCRIPTION("I2C-Bus PCF8584 algorithm");
MODULE_LICENSE("GPL");
-
-module_param(i2c_debug, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(i2c_debug,
- "debug level - 0 off; 1 normal; 2,3 more verbose; 9 pcf-protocol");
--
2.43.0
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