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List: linux-input
Subject: Re: [PATCH 4/4] Input: synaptics-rmi4 - when registering sensors do not call them "drivers"
From: Benjamin Tissoires <benjamin.tissoires () redhat ! com>
Date: 2017-03-31 9:28:42
Message-ID: 20170331092842.GK22683 () mail ! corp ! redhat ! com
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On Mar 24 2017 or thereabouts, Dmitry Torokhov wrote:
> We are not registering drivers, but transport devices (AKA sensors), so
> let's call them that.
>
> Also let's rename "retval" to "error" in probe() functions as the variables
> are used to store error codes.
>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> ---
Looks good to me:
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cheers,
Benjamin
> drivers/input/rmi4/rmi_i2c.c | 51 +++++++++++++++++++++---------------------
> drivers/input/rmi4/rmi_smbus.c | 43 +++++++++++++++++------------------
> drivers/input/rmi4/rmi_spi.c | 44 +++++++++++++++++++-----------------
> 3 files changed, 69 insertions(+), 69 deletions(-)
>
> diff --git a/drivers/input/rmi4/rmi_i2c.c b/drivers/input/rmi4/rmi_i2c.c
> index 082306d7c207..e28663ef9e5a 100644
> --- a/drivers/input/rmi4/rmi_i2c.c
> +++ b/drivers/input/rmi4/rmi_i2c.c
> @@ -204,7 +204,7 @@ static int rmi_i2c_probe(struct i2c_client *client,
> struct rmi_device_platform_data *client_pdata =
> dev_get_platdata(&client->dev);
> struct rmi_i2c_xport *rmi_i2c;
> - int retval;
> + int error;
>
> rmi_i2c = devm_kzalloc(&client->dev, sizeof(struct rmi_i2c_xport),
> GFP_KERNEL);
> @@ -220,30 +220,31 @@ static int rmi_i2c_probe(struct i2c_client *client,
>
> rmi_dbg(RMI_DEBUG_XPORT, &client->dev, "Probing %s.\n",
> dev_name(&client->dev));
> +
> if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
> dev_err(&client->dev,
> - "adapter does not support required functionality.\n");
> + "adapter does not support required functionality\n");
> return -ENODEV;
> }
>
> rmi_i2c->supplies[0].supply = "vdd";
> rmi_i2c->supplies[1].supply = "vio";
> - retval = devm_regulator_bulk_get(&client->dev,
> + error = devm_regulator_bulk_get(&client->dev,
> ARRAY_SIZE(rmi_i2c->supplies),
> rmi_i2c->supplies);
> - if (retval < 0)
> - return retval;
> + if (error < 0)
> + return error;
>
> - retval = regulator_bulk_enable(ARRAY_SIZE(rmi_i2c->supplies),
> + error = regulator_bulk_enable(ARRAY_SIZE(rmi_i2c->supplies),
> rmi_i2c->supplies);
> - if (retval < 0)
> - return retval;
> + if (error < 0)
> + return error;
>
> - retval = devm_add_action_or_reset(&client->dev,
> + error = devm_add_action_or_reset(&client->dev,
> rmi_i2c_regulator_bulk_disable,
> rmi_i2c);
> - if (retval)
> - return retval;
> + if (error)
> + return error;
>
> of_property_read_u32(client->dev.of_node, "syna,startup-delay-ms",
> &rmi_i2c->startup_delay);
> @@ -263,26 +264,26 @@ static int rmi_i2c_probe(struct i2c_client *client,
> * Setting the page to zero will (a) make sure the PSR is in a
> * known state, and (b) make sure we can talk to the device.
> */
> - retval = rmi_set_page(rmi_i2c, 0);
> - if (retval) {
> - dev_err(&client->dev, "Failed to set page select to 0.\n");
> - return retval;
> + error = rmi_set_page(rmi_i2c, 0);
> + if (error) {
> + dev_err(&client->dev, "Failed to set page select to 0\n");
> + return error;
> }
>
> - retval = rmi_register_transport_device(&rmi_i2c->xport);
> - if (retval) {
> - dev_err(&client->dev, "Failed to register transport driver at 0x%.2X.\n",
> - client->addr);
> - return retval;
> + dev_info(&client->dev, "registering I2C-connected sensor\n");
> +
> + error = rmi_register_transport_device(&rmi_i2c->xport);
> + if (error) {
> + dev_err(&client->dev, "failed to register sensor: %d\n", error);
> + return error;
> }
> - retval = devm_add_action_or_reset(&client->dev,
> +
> + error = devm_add_action_or_reset(&client->dev,
> rmi_i2c_unregister_transport,
> rmi_i2c);
> - if (retval)
> - return retval;
> + if (error)
> + return error;
>
> - dev_info(&client->dev, "registered rmi i2c driver at %#04x.\n",
> - client->addr);
> return 0;
> }
>
> diff --git a/drivers/input/rmi4/rmi_smbus.c b/drivers/input/rmi4/rmi_smbus.c
> index 724643bf31a6..e84400301973 100644
> --- a/drivers/input/rmi4/rmi_smbus.c
> +++ b/drivers/input/rmi4/rmi_smbus.c
> @@ -53,6 +53,7 @@ static int rmi_smb_get_version(struct rmi_smb_xport *rmi_smb)
> dev_err(&client->dev, "failed to get SMBus version number!\n");
> return retval;
> }
> +
> return retval + 1;
> }
>
> @@ -274,19 +275,24 @@ static int rmi_smb_probe(struct i2c_client *client,
> {
> struct rmi_device_platform_data *pdata = dev_get_platdata(&client->dev);
> struct rmi_smb_xport *rmi_smb;
> - int retval;
> int smbus_version;
> + int error;
> +
> + if (!pdata) {
> + dev_err(&client->dev, "no platform data, aborting\n");
> + return -ENOMEM;
> + }
>
> if (!i2c_check_functionality(client->adapter,
> I2C_FUNC_SMBUS_READ_BLOCK_DATA |
> I2C_FUNC_SMBUS_HOST_NOTIFY)) {
> dev_err(&client->dev,
> - "adapter does not support required functionality.\n");
> + "adapter does not support required functionality\n");
> return -ENODEV;
> }
>
> if (client->irq <= 0) {
> - dev_err(&client->dev, "no IRQ provided, giving up.\n");
> + dev_err(&client->dev, "no IRQ provided, giving up\n");
> return client->irq ? client->irq : -ENODEV;
> }
>
> @@ -295,12 +301,7 @@ static int rmi_smb_probe(struct i2c_client *client,
> if (!rmi_smb)
> return -ENOMEM;
>
> - if (!pdata) {
> - dev_err(&client->dev, "no platform data, aborting\n");
> - return -ENOMEM;
> - }
> -
> - rmi_dbg(RMI_DEBUG_XPORT, &client->dev, "Probing %s.\n",
> + rmi_dbg(RMI_DEBUG_XPORT, &client->dev, "Probing %s\n",
> dev_name(&client->dev));
>
> rmi_smb->client = client;
> @@ -313,34 +314,30 @@ static int rmi_smb_probe(struct i2c_client *client,
> rmi_smb->xport.proto_name = "smb2";
> rmi_smb->xport.ops = &rmi_smb_ops;
>
> - retval = rmi_smb_get_version(rmi_smb);
> - if (retval < 0)
> - return retval;
> + smbus_version = rmi_smb_get_version(rmi_smb);
> + if (smbus_version < 0)
> + return smbus_version;
>
> - smbus_version = retval;
> rmi_dbg(RMI_DEBUG_XPORT, &client->dev, "Smbus version is %d",
> smbus_version);
>
> if (smbus_version != 2) {
> - dev_err(&client->dev, "Unrecognized SMB version %d.\n",
> + dev_err(&client->dev, "Unrecognized SMB version %d\n",
> smbus_version);
> return -ENODEV;
> }
>
> i2c_set_clientdata(client, rmi_smb);
>
> - retval = rmi_register_transport_device(&rmi_smb->xport);
> - if (retval) {
> - dev_err(&client->dev, "Failed to register transport driver at 0x%.2X.\n",
> - client->addr);
> - i2c_set_clientdata(client, NULL);
> - return retval;
> + dev_info(&client->dev, "registering SMbus-connected sensor\n");
> +
> + error = rmi_register_transport_device(&rmi_smb->xport);
> + if (error) {
> + dev_err(&client->dev, "failed to register sensor: %d\n", error);
> + return error;
> }
>
> - dev_info(&client->dev, "registered rmi smb driver at %#04x.\n",
> - client->addr);
> return 0;
> -
> }
>
> static int rmi_smb_remove(struct i2c_client *client)
> diff --git a/drivers/input/rmi4/rmi_spi.c b/drivers/input/rmi4/rmi_spi.c
> index 69548d7d1f10..d97a85907ed6 100644
> --- a/drivers/input/rmi4/rmi_spi.c
> +++ b/drivers/input/rmi4/rmi_spi.c
> @@ -370,7 +370,7 @@ static int rmi_spi_probe(struct spi_device *spi)
> struct rmi_spi_xport *rmi_spi;
> struct rmi_device_platform_data *pdata;
> struct rmi_device_platform_data *spi_pdata = spi->dev.platform_data;
> - int retval;
> + int error;
>
> if (spi->master->flags & SPI_MASTER_HALF_DUPLEX)
> return -EINVAL;
> @@ -383,9 +383,9 @@ static int rmi_spi_probe(struct spi_device *spi)
> pdata = &rmi_spi->xport.pdata;
>
> if (spi->dev.of_node) {
> - retval = rmi_spi_of_probe(spi, pdata);
> - if (retval)
> - return retval;
> + error = rmi_spi_of_probe(spi, pdata);
> + if (error)
> + return error;
> } else if (spi_pdata) {
> *pdata = *spi_pdata;
> }
> @@ -396,10 +396,10 @@ static int rmi_spi_probe(struct spi_device *spi)
> if (pdata->spi_data.mode)
> spi->mode = pdata->spi_data.mode;
>
> - retval = spi_setup(spi);
> - if (retval < 0) {
> + error = spi_setup(spi);
> + if (error < 0) {
> dev_err(&spi->dev, "spi_setup failed!\n");
> - return retval;
> + return error;
> }
>
> pdata->irq = spi->irq;
> @@ -413,32 +413,34 @@ static int rmi_spi_probe(struct spi_device *spi)
>
> spi_set_drvdata(spi, rmi_spi);
>
> - retval = rmi_spi_manage_pools(rmi_spi, RMI_SPI_DEFAULT_XFER_BUF_SIZE);
> - if (retval)
> - return retval;
> + error = rmi_spi_manage_pools(rmi_spi, RMI_SPI_DEFAULT_XFER_BUF_SIZE);
> + if (error)
> + return error;
>
> /*
> * Setting the page to zero will (a) make sure the PSR is in a
> * known state, and (b) make sure we can talk to the device.
> */
> - retval = rmi_set_page(rmi_spi, 0);
> - if (retval) {
> + error = rmi_set_page(rmi_spi, 0);
> + if (error) {
> dev_err(&spi->dev, "Failed to set page select to 0.\n");
> - return retval;
> + return error;
> }
>
> - retval = rmi_register_transport_device(&rmi_spi->xport);
> - if (retval) {
> - dev_err(&spi->dev, "failed to register transport.\n");
> - return retval;
> + dev_info(&spi->dev, "registering SPI-connected sensor\n");
> +
> + error = rmi_register_transport_device(&rmi_spi->xport);
> + if (error) {
> + dev_err(&spi->dev, "failed to register sensor: %d\n", error);
> + return error;
> }
> - retval = devm_add_action_or_reset(&spi->dev,
> +
> + error = devm_add_action_or_reset(&spi->dev,
> rmi_spi_unregister_transport,
> rmi_spi);
> - if (retval)
> - return retval;
> + if (error)
> + return error;
>
> - dev_info(&spi->dev, "registered RMI SPI driver\n");
> return 0;
> }
>
> --
> 2.12.1.578.ge9c3154ca4-goog
>
--
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