From 3a2dc1677b60af250bea85d470ef5151c70a1264 Mon Sep 17 00:00:00 2001 From: Vaibhav Hiremath Date: Tue, 14 Jul 2015 13:06:44 +0530 Subject: [PATCH] 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 Signed-off-by: Vaibhav Hiremath Cc: Wolfram Sang Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-pxa.c | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c index d0cc058f42c3..beeed7c53f2d 100644 --- a/drivers/i2c/busses/i2c-pxa.c +++ b/drivers/i2c/busses/i2c-pxa.c @@ -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.