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i2c: pxa: Update debug function to dump more info on error 

Update i2c_pxa_scream_blue_murder() fn to print more information
in case of error.
Also, use dev_err variants instead of printk.

Signed-off-by: Jett.Zhou <jtzhou@marvell.com>
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Cc: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Vaibhav Hiremath 2015-07-14 13:06:44 +05:30 коммит произвёл Wolfram Sang
Родитель e2b498fd55
Коммит 3a2dc1677b
1 изменённых файлов: 15 добавлений и 7 удалений
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22
drivers/i2c/busses/i2c-pxa.c
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@ -132,6 +132,7 @@ struct pxa_i2c {
unsigned int msg_idx;
unsigned int msg_ptr;
unsigned int slave_addr;
unsigned int req_slave_addr;
struct i2c_adapter adap;
struct clk *clk;
@ -253,15 +254,20 @@ static void i2c_pxa_show_state(struct pxa_i2c *i2c, int lno, const char *fname)
static void i2c_pxa_scream_blue_murder(struct pxa_i2c *i2c, const char *why)
{
unsigned int i;
printk(KERN_ERR "i2c: error: %s\n", why);
printk(KERN_ERR "i2c: msg_num: %d msg_idx: %d msg_ptr: %d\n",
struct device *dev = &i2c->adap.dev;
dev_err(dev, "slave_0x%x error: %s\n",
i2c->req_slave_addr >> 1, why);
dev_err(dev, "msg_num: %d msg_idx: %d msg_ptr: %d\n",
i2c->msg_num, i2c->msg_idx, i2c->msg_ptr);
printk(KERN_ERR "i2c: ICR: %08x ISR: %08x\n",
readl(_ICR(i2c)), readl(_ISR(i2c)));
printk(KERN_DEBUG "i2c: log: ");
dev_err(dev, "IBMR: %08x IDBR: %08x ICR: %08x ISR: %08x\n",
readl(_IBMR(i2c)), readl(_IDBR(i2c)), readl(_ICR(i2c)),
readl(_ISR(i2c)));
dev_dbg(dev, "log: ");
for (i = 0; i < i2c->irqlogidx; i++)
printk("[%08x:%08x] ", i2c->isrlog[i], i2c->icrlog[i]);
printk("\n");
pr_debug("[%08x:%08x] ", i2c->isrlog[i], i2c->icrlog[i]);
pr_debug("\n");
}
#else /* ifdef DEBUG */
@ -638,6 +644,7 @@ static inline void i2c_pxa_start_message(struct pxa_i2c *i2c)
* Step 1: target slave address into IDBR
*/
writel(i2c_pxa_addr_byte(i2c->msg), _IDBR(i2c));
i2c->req_slave_addr = i2c_pxa_addr_byte(i2c->msg);
/*
* Step 2: initiate the write.
@ -951,6 +958,7 @@ static void i2c_pxa_irq_txempty(struct pxa_i2c *i2c, u32 isr)
* Write the next address.
*/
writel(i2c_pxa_addr_byte(i2c->msg), _IDBR(i2c));
i2c->req_slave_addr = i2c_pxa_addr_byte(i2c->msg);
/*
* And trigger a repeated start, and send the byte.