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media: i2c: adv748x: Add support for i2c_new_secondary_device

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The ADV748x has twelve 256-byte maps that can be accessed via the main
I2C ports. Each map has it own I2C address and acts as a standard slave
device on the I2C bus.

Allow a device tree node to override the default addresses so that
address conflicts with other devices on the same bus may be resolved at
the board description level.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Kieran Bingham 2018-02-27 10:05:50 -05:00 committed by Mauro Carvalho Chehab
parent 71569850e3
commit 67537fe960
2 changed files with 36 additions and 55 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

77
drivers/media/i2c/adv748x/adv748x-core.c
View File

@ -80,21 +80,24 @@ static int adv748x_configure_regmap(struct adv748x_state *state, int region)
return 0;
}
struct adv748x_register_map {
const char *name;
u8 default_addr;
};
/* Default addresses for the I2C pages */
static int adv748x_i2c_addresses[ADV748X_PAGE_MAX] = {
ADV748X_I2C_IO,
ADV748X_I2C_DPLL,
ADV748X_I2C_CP,
ADV748X_I2C_HDMI,
ADV748X_I2C_EDID,
ADV748X_I2C_REPEATER,
ADV748X_I2C_INFOFRAME,
ADV748X_I2C_CBUS,
ADV748X_I2C_CEC,
ADV748X_I2C_SDP,
ADV748X_I2C_TXB,
ADV748X_I2C_TXA,
static const struct adv748x_register_map adv748x_default_addresses[] = {
[ADV748X_PAGE_IO] = { "main", 0x70 },
[ADV748X_PAGE_DPLL] = { "dpll", 0x26 },
[ADV748X_PAGE_CP] = { "cp", 0x22 },
[ADV748X_PAGE_HDMI] = { "hdmi", 0x34 },
[ADV748X_PAGE_EDID] = { "edid", 0x36 },
[ADV748X_PAGE_REPEATER] = { "repeater", 0x32 },
[ADV748X_PAGE_INFOFRAME] = { "infoframe", 0x31 },
[ADV748X_PAGE_CBUS] = { "cbus", 0x30 },
[ADV748X_PAGE_CEC] = { "cec", 0x41 },
[ADV748X_PAGE_SDP] = { "sdp", 0x79 },
[ADV748X_PAGE_TXB] = { "txb", 0x48 },
[ADV748X_PAGE_TXA] = { "txa", 0x4a },
};
static int adv748x_read_check(struct adv748x_state *state,
@ -143,15 +146,20 @@ int adv748x_write_block(struct adv748x_state *state, int client_page,
return regmap_raw_write(regmap, init_reg, val, val_len);
}
static struct i2c_client *adv748x_dummy_client(struct adv748x_state *state,
u8 addr, u8 io_reg)
static int adv748x_set_slave_addresses(struct adv748x_state *state)
{
struct i2c_client *client = state->client;
struct i2c_client *client;
unsigned int i;
u8 io_reg;
if (addr)
io_write(state, io_reg, addr << 1);
for (i = ADV748X_PAGE_DPLL; i < ADV748X_PAGE_MAX; ++i) {
io_reg = ADV748X_IO_SLAVE_ADDR_BASE + i;
client = state->i2c_clients[i];
return i2c_new_dummy(client->adapter, io_read(state, io_reg) >> 1);
io_write(state, io_reg, client->addr << 1);
}
return 0;
}
static void adv748x_unregister_clients(struct adv748x_state *state)
@ -164,13 +172,15 @@ static void adv748x_unregister_clients(struct adv748x_state *state)
static int adv748x_initialise_clients(struct adv748x_state *state)
{
int i;
unsigned int i;
int ret;
for (i = ADV748X_PAGE_DPLL; i < ADV748X_PAGE_MAX; ++i) {
state->i2c_clients[i] =
adv748x_dummy_client(state, adv748x_i2c_addresses[i],
ADV748X_IO_SLAVE_ADDR_BASE + i);
state->i2c_clients[i] = i2c_new_secondary_device(
state->client,
adv748x_default_addresses[i].name,
adv748x_default_addresses[i].default_addr);
if (state->i2c_clients[i] == NULL) {
adv_err(state, "failed to create i2c client %u\n", i);
return -ENOMEM;
@ -181,7 +191,7 @@ static int adv748x_initialise_clients(struct adv748x_state *state)
return ret;
}
return 0;
return adv748x_set_slave_addresses(state);
}
/**
@ -347,21 +357,6 @@ static const struct adv748x_reg_value adv748x_sw_reset[] = {
{ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
};
static const struct adv748x_reg_value adv748x_set_slave_address[] = {
{ADV748X_PAGE_IO, 0xf3, ADV748X_I2C_DPLL << 1},
{ADV748X_PAGE_IO, 0xf4, ADV748X_I2C_CP << 1},
{ADV748X_PAGE_IO, 0xf5, ADV748X_I2C_HDMI << 1},
{ADV748X_PAGE_IO, 0xf6, ADV748X_I2C_EDID << 1},
{ADV748X_PAGE_IO, 0xf7, ADV748X_I2C_REPEATER << 1},
{ADV748X_PAGE_IO, 0xf8, ADV748X_I2C_INFOFRAME << 1},
{ADV748X_PAGE_IO, 0xf9, ADV748X_I2C_CBUS << 1},
{ADV748X_PAGE_IO, 0xfa, ADV748X_I2C_CEC << 1},
{ADV748X_PAGE_IO, 0xfb, ADV748X_I2C_SDP << 1},
{ADV748X_PAGE_IO, 0xfc, ADV748X_I2C_TXB << 1},
{ADV748X_PAGE_IO, 0xfd, ADV748X_I2C_TXA << 1},
{ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
};
/* Supported Formats For Script Below */
/* - 01-29 HDMI to MIPI TxA CSI 4-Lane - RGB888: */
static const struct adv748x_reg_value adv748x_init_txa_4lane[] = {
@ -492,7 +487,7 @@ static int adv748x_reset(struct adv748x_state *state)
if (ret < 0)
return ret;
ret = adv748x_write_regs(state, adv748x_set_slave_address);
ret = adv748x_set_slave_addresses(state);
if (ret < 0)
return ret;

14
drivers/media/i2c/adv748x/adv748x.h
View File

@ -27,20 +27,6 @@
#ifndef _ADV748X_H_
#define _ADV748X_H_
/* I2C slave addresses */
#define ADV748X_I2C_IO 0x70 /* IO Map */
#define ADV748X_I2C_DPLL 0x26 /* DPLL Map */
#define ADV748X_I2C_CP 0x22 /* CP Map */
#define ADV748X_I2C_HDMI 0x34 /* HDMI Map */
#define ADV748X_I2C_EDID 0x36 /* EDID Map */
#define ADV748X_I2C_REPEATER 0x32 /* HDMI RX Repeater Map */
#define ADV748X_I2C_INFOFRAME 0x31 /* HDMI RX InfoFrame Map */
#define ADV748X_I2C_CBUS 0x30 /* CBUS MHL Map */
#define ADV748X_I2C_CEC 0x41 /* CEC Map */
#define ADV748X_I2C_SDP 0x79 /* SDP Map */
#define ADV748X_I2C_TXB 0x48 /* CSI-TXB Map */
#define ADV748X_I2C_TXA 0x4a /* CSI-TXA Map */
enum adv748x_page {
ADV748X_PAGE_IO,
ADV748X_PAGE_DPLL,