Renesas PMIC RAA215300 exposes two separate i2c devices, one for the main device and another for rtc device. Enhance i2c_new_ancillary_device() to instantiate a real device. (eg: Instantiate rtc device from PMIC driver) Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx> --- v3: * New patch Ref: https://patchwork.kernel.org/project/linux-renesas-soc/patch/20230505172530.357455-5-biju.das.jz@xxxxxxxxxxxxxx/ --- drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 6 ++-- drivers/i2c/i2c-core-base.c | 38 ++++++++++++++++---- drivers/media/i2c/adv748x/adv748x-core.c | 2 +- drivers/media/i2c/adv7604.c | 3 +- include/linux/i2c.h | 3 +- 5 files changed, 39 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index ddceafa7b637..86306b010a0a 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c @@ -1072,7 +1072,7 @@ static int adv7511_init_cec_regmap(struct adv7511 *adv) int ret; adv->i2c_cec = i2c_new_ancillary_device(adv->i2c_main, "cec", - ADV7511_CEC_I2C_ADDR_DEFAULT); + ADV7511_CEC_I2C_ADDR_DEFAULT, NULL); if (IS_ERR(adv->i2c_cec)) return PTR_ERR(adv->i2c_cec); @@ -1261,7 +1261,7 @@ static int adv7511_probe(struct i2c_client *i2c) adv7511_packet_disable(adv7511, 0xffff); adv7511->i2c_edid = i2c_new_ancillary_device(i2c, "edid", - ADV7511_EDID_I2C_ADDR_DEFAULT); + ADV7511_EDID_I2C_ADDR_DEFAULT, NULL); if (IS_ERR(adv7511->i2c_edid)) { ret = PTR_ERR(adv7511->i2c_edid); goto uninit_regulators; @@ -1271,7 +1271,7 @@ static int adv7511_probe(struct i2c_client *i2c) adv7511->i2c_edid->addr << 1); adv7511->i2c_packet = i2c_new_ancillary_device(i2c, "packet", - ADV7511_PACKET_I2C_ADDR_DEFAULT); + ADV7511_PACKET_I2C_ADDR_DEFAULT, NULL); if (IS_ERR(adv7511->i2c_packet)) { ret = PTR_ERR(adv7511->i2c_packet); goto err_i2c_unregister_edid; diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index ae3af738b03f..4f0964326968 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -1122,15 +1122,17 @@ EXPORT_SYMBOL_GPL(devm_i2c_new_dummy_device); * @client: Handle to the primary client * @name: Handle to specify which secondary address to get * @default_addr: Used as a fallback if no secondary address was specified + * @aux_device_name: Ancillary device name * Context: can sleep * * I2C clients can be composed of multiple I2C slaves bound together in a single * component. The I2C client driver then binds to the master I2C slave and needs - * to create I2C dummy clients to communicate with all the other slaves. + * to create I2C ancillary clients to communicate with all the other slaves. * - * This function creates and returns an I2C dummy client whose I2C address is - * retrieved from the platform firmware based on the given slave name. If no - * address is specified by the firmware default_addr is used. + * This function creates and returns an I2C ancillary client whose I2C address + * is retrieved from the platform firmware based on the given slave name. If no + * address is specified by the firmware default_addr is used. If no aux_device_ + * name is specified by the firmware, it will create an I2C dummy client. * * On DT-based platforms the address is retrieved from the "reg" property entry * cell whose "reg-names" value matches the slave name. @@ -1139,10 +1141,12 @@ EXPORT_SYMBOL_GPL(devm_i2c_new_dummy_device); * i2c_unregister_device(); or an ERR_PTR to describe the error. */ struct i2c_client *i2c_new_ancillary_device(struct i2c_client *client, - const char *name, - u16 default_addr) + const char *name, + u16 default_addr, + const char *aux_device_name) { struct device_node *np = client->dev.of_node; + struct i2c_client *i2c_aux_client; u32 addr = default_addr; int i; @@ -1153,7 +1157,27 @@ struct i2c_client *i2c_new_ancillary_device(struct i2c_client *client, } dev_dbg(&client->adapter->dev, "Address for %s : 0x%x\n", name, addr); - return i2c_new_dummy_device(client->adapter, addr); + + if (aux_device_name) { + struct i2c_board_info info; + size_t aux_device_name_len = strlen(aux_device_name); + + if (aux_device_name_len > I2C_NAME_SIZE - 1) { + dev_err(&client->adapter->dev, "Invalid device name\n"); + return ERR_PTR(-EINVAL); + } + + memset(&info, 0, sizeof(struct i2c_board_info)); + + memcpy(info.type, aux_device_name, aux_device_name_len); + info.addr = addr; + + i2c_aux_client = i2c_new_client_device(client->adapter, &info); + } else { + i2c_aux_client = i2c_new_dummy_device(client->adapter, addr); + } + + return i2c_aux_client; } EXPORT_SYMBOL_GPL(i2c_new_ancillary_device); diff --git a/drivers/media/i2c/adv748x/adv748x-core.c b/drivers/media/i2c/adv748x/adv748x-core.c index 4498d78a2357..5bdf7b0c6bf3 100644 --- a/drivers/media/i2c/adv748x/adv748x-core.c +++ b/drivers/media/i2c/adv748x/adv748x-core.c @@ -186,7 +186,7 @@ static int adv748x_initialise_clients(struct adv748x_state *state) state->i2c_clients[i] = i2c_new_ancillary_device( state->client, adv748x_default_addresses[i].name, - adv748x_default_addresses[i].default_addr); + adv748x_default_addresses[i].default_addr, NULL); if (IS_ERR(state->i2c_clients[i])) { adv_err(state, "failed to create i2c client %u\n", i); diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c index 3d0898c4175e..63fa44c9d27c 100644 --- a/drivers/media/i2c/adv7604.c +++ b/drivers/media/i2c/adv7604.c @@ -2935,7 +2935,8 @@ static struct i2c_client *adv76xx_dummy_client(struct v4l2_subdev *sd, else new_client = i2c_new_ancillary_device(client, adv76xx_default_addresses[page].name, - adv76xx_default_addresses[page].default_addr); + adv76xx_default_addresses[page].default_addr, + NULL); if (!IS_ERR(new_client)) io_write(sd, io_reg, new_client->addr << 1); diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 13a1ce38cb0c..0ce344724209 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -489,7 +489,8 @@ devm_i2c_new_dummy_device(struct device *dev, struct i2c_adapter *adap, u16 addr struct i2c_client * i2c_new_ancillary_device(struct i2c_client *client, const char *name, - u16 default_addr); + u16 default_addr, + const char *aux_device_name); void i2c_unregister_device(struct i2c_client *client); -- 2.25.1
