V4L/DVB (13214): tda18271: allow for i2c buses that cant send 16 bytes at once

There is already an option for sending 16 byte chunks rather that writing
39 bytes all at once during the tuner's initialization.  Some i2c buses
can't send 16 bytes at once, so create an option for sending 8 byte chunks.

Signed-off-by: Michael Krufky <mkrufky@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 14 insertions, 2 deletions

diff --git a/drivers/media/common/tuners/tda18271-common.c b/drivers/media/common/tuners/tda18271-common.c
index 155c93eb75da..e1f678281a58 100644
--- a/drivers/media/common/tuners/tda18271-common.c
+++ b/drivers/media/common/tuners/tda18271-common.c
@@ -326,12 +326,24 @@ int tda18271_init_regs(struct dvb_frontend *fe)
         regs[R_EB22] = 0x48;
         regs[R_EB23] = 0xb0;
 
-        if (priv->small_i2c) {
+        switch (priv->small_i2c) {
+        case TDA18271_08_BYTE_CHUNK_INIT:
+                tda18271_write_regs(fe, 0x00, 0x08);
+                tda18271_write_regs(fe, 0x08, 0x08);
+                tda18271_write_regs(fe, 0x10, 0x08);
+                tda18271_write_regs(fe, 0x18, 0x08);
+                tda18271_write_regs(fe, 0x20, 0x07);
+                break;
+        case TDA18271_16_BYTE_CHUNK_INIT:
                 tda18271_write_regs(fe, 0x00, 0x10);
                 tda18271_write_regs(fe, 0x10, 0x10);
                 tda18271_write_regs(fe, 0x20, 0x07);
-        } else
+                break;
+        case TDA18271_39_BYTE_CHUNK_INIT:
+        default:
                 tda18271_write_regs(fe, 0x00, TDA18271_NUM_REGS);
+                break;
+        }
 
         /* setup agc1 gain */
         regs[R_EB17] = 0x00;