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Subject[PATCH v2 3/3] media: i2c: adv748x: Add support for i2c_new_secondary_device
Date
From: Kieran Bingham <kieran.bingham@ideasonboard.com>

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>
---
drivers/media/i2c/adv748x/adv748x-core.c | 77 +++++++++++++++-----------------
drivers/media/i2c/adv748x/adv748x.h | 14 ------
2 files changed, 36 insertions(+), 55 deletions(-)

diff --git a/drivers/media/i2c/adv748x/adv748x-core.c b/drivers/media/i2c/adv748x/adv748x-core.c
index 9dcaadaca217..911ccf6eb68c 100644
--- a/drivers/media/i2c/adv748x/adv748x-core.c
+++ b/drivers/media/i2c/adv748x/adv748x-core.c
@@ -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;
+
+ for (i = ADV748X_PAGE_DPLL; i < ADV748X_PAGE_MAX; ++i) {
+ io_reg = ADV748X_IO_SLAVE_ADDR_BASE + i;
+ client = state->i2c_clients[i];

- if (addr)
- io_write(state, io_reg, addr << 1);
+ io_write(state, io_reg, client->addr << 1);
+ }

- return i2c_new_dummy(client->adapter, io_read(state, io_reg) >> 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;

diff --git a/drivers/media/i2c/adv748x/adv748x.h b/drivers/media/i2c/adv748x/adv748x.h
index 725662edc4b8..65f83741277e 100644
--- a/drivers/media/i2c/adv748x/adv748x.h
+++ b/drivers/media/i2c/adv748x/adv748x.h
@@ -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,
--
2.7.4
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