[PATCH 097/100] ccs: Add debug prints for MSR registers

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Also print out MSR registers written to the sensor. This isn't entirely
optimal as the debug strings are produced even if they're not used but
that isn't really a grave issue --- the I²C bus is very slow anyway.

Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
 drivers/media/i2c/ccs/ccs-reg-access.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/media/i2c/ccs/ccs-reg-access.c b/drivers/media/i2c/ccs/ccs-reg-access.c
index 2025e9ab6e91..c600f143a1b9 100644
--- a/drivers/media/i2c/ccs/ccs-reg-access.c
+++ b/drivers/media/i2c/ccs/ccs-reg-access.c
@@ -387,12 +387,20 @@ int ccs_write_data_regs(struct ccs_sensor *sensor, struct ccs_reg *regs,
 
 		for (j = 0; j < regs->len;
 		     j += msg.len - 2, regdata += msg.len - 2) {
+			char printbuf[(MAX_WRITE_LEN << 1) + 1 /* nil */] =
+				{ 0 };
 			int rval;
 
 			msg.len = min(regs->len - j, MAX_WRITE_LEN);
 
+			bin2hex(printbuf, regdata, msg.len);
+			dev_dbg(&client->dev,
+				"writing msr reg 0x%4.4x value 0x%s\n",
+				regs->addr + j, printbuf);
+
 			put_unaligned_be16(regs->addr + j, buf);
 			memcpy(buf + 2, regdata, msg.len);
+
 			msg.len += 2;
 
 			rval = ccs_write_retry(client, &msg);
-- 
2.27.0




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