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author | Kieran Bingham <kieran.bingham@ideasonboard.com> | 2018-02-27 10:05:50 -0500 |
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committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2018-03-21 12:08:30 -0400 |
commit | 67537fe960e5f837436403b148fcc33a356aa4bb (patch) | |
tree | 6e37468de24b8ca1da5aefda0b1e05d630fc8791 /drivers/media/i2c/adv748x | |
parent | 71569850e3242db475a15b5e2674bf2b6e81d1a7 (diff) | |
download | linux-stable-67537fe960e5f837436403b148fcc33a356aa4bb.tar.gz linux-stable-67537fe960e5f837436403b148fcc33a356aa4bb.tar.bz2 linux-stable-67537fe960e5f837436403b148fcc33a356aa4bb.zip |
media: i2c: adv748x: Add support for i2c_new_secondary_device
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>
Diffstat (limited to 'drivers/media/i2c/adv748x')
-rw-r--r-- | drivers/media/i2c/adv748x/adv748x-core.c | 77 | ||||
-rw-r--r-- | 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 e712c74cff50..6ca88daa0ecd 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, |