| Message ID | 20220120134326.5295-7-sbinding@opensource.cirrus.com |
|---|---|
| State | New |
| Headers | show |
| Series | Support Spi in i2c-multi-instantiate driver | expand |
Hi, On 1/20/22 14:43, Stefan Binding wrote: > From: Lucas Tanure <tanureal@opensource.cirrus.com> > > Reorganize I2C functions to accommodate SPI support > Split the probe and factor out parts of the code > that will be used in the SPI support > > Signed-off-by: Lucas Tanure <tanureal@opensource.cirrus.com> > Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com> > --- > drivers/platform/x86/bus-multi-instantiate.c | 150 ++++++++++++------- > 1 file changed, 96 insertions(+), 54 deletions(-) > > diff --git a/drivers/platform/x86/bus-multi-instantiate.c b/drivers/platform/x86/bus-multi-instantiate.c > index 982dfecfd27c..50f1540762e9 100644 > --- a/drivers/platform/x86/bus-multi-instantiate.c > +++ b/drivers/platform/x86/bus-multi-instantiate.c > @@ -29,85 +29,129 @@ struct bmi_instance { > > struct bmi { > int i2c_num; > - struct i2c_client *i2c_devs[]; > + struct i2c_client **i2c_devs; > }; > > -static int bmi_probe(struct platform_device *pdev) > +static int bmi_get_irq(struct platform_device *pdev, struct acpi_device *adev, > + const struct bmi_instance *inst) > +{ > + int ret; > + > + switch (inst->flags & IRQ_RESOURCE_TYPE) { > + case IRQ_RESOURCE_GPIO: > + ret = acpi_dev_gpio_irq_get(adev, inst->irq_idx); > + break; > + case IRQ_RESOURCE_APIC: > + ret = platform_get_irq(pdev, inst->irq_idx); > + break; > + default: > + ret = 0; > + break; > + } > + > + if (ret < 0) > + dev_err_probe(&pdev->dev, ret, "Error requesting irq at index %d: %d\n", > + inst->irq_idx, ret); > + > + return ret; > +} > + > +static void bmi_devs_unregister(struct bmi *bmi) > +{ > + while (bmi->i2c_num > 0) > + i2c_unregister_device(bmi->i2c_devs[--bmi->i2c_num]); > +} > + > +/** > + * bmi_i2c_probe - Instantiate multiple I2C devices from inst array > + * @pdev: Platform device > + * @adev: ACPI device > + * @bmi: Internal struct for Bus multi instantiate driver > + * @inst: Array of instances to probe > + * > + * Returns the number of I2C devices instantiate, Zero if none is found or a negative error code. > + */ > +static int bmi_i2c_probe(struct platform_device *pdev, struct acpi_device *adev, struct bmi *bmi, > + const struct bmi_instance *inst_array) > { > struct i2c_board_info board_info = {}; > - const struct bmi_instance *inst; > struct device *dev = &pdev->dev; > - struct acpi_device *adev; > - struct bmi *bmi; > char name[32]; > - int i, ret; > + int i, ret = 0, count; Nitpick no need to init ret to 0 here since you re-assing it immediately afterwards. > > - inst = device_get_match_data(dev); > - if (!inst) { > - dev_err(dev, "Error ACPI match data is missing\n"); > - return -ENODEV; > - } > - > - adev = ACPI_COMPANION(dev); > - > - /* Count number of clients to instantiate */ > ret = i2c_acpi_client_count(adev); > - if (ret < 0) > + if (ret <= 0) > return ret; > + count = ret; > > - bmi = devm_kmalloc(dev, struct_size(bmi, i2c_devs, ret), GFP_KERNEL); > - if (!bmi) > + bmi->i2c_devs = devm_kcalloc(dev, count, sizeof(*bmi->i2c_devs), GFP_KERNEL); > + if (!bmi->i2c_devs) > return -ENOMEM; > > - bmi->i2c_num = ret; > - > - for (i = 0; i < bmi->i2c_num && inst[i].type; i++) { > + for (i = 0; i < count && inst_array[i].type; i++) { > memset(&board_info, 0, sizeof(board_info)); > - strlcpy(board_info.type, inst[i].type, I2C_NAME_SIZE); > - snprintf(name, sizeof(name), "%s-%s.%d", dev_name(dev), inst[i].type, i); > + strscpy(board_info.type, inst_array[i].type, I2C_NAME_SIZE); > + snprintf(name, sizeof(name), "%s-%s.%d", dev_name(dev), inst_array[i].type, i); > board_info.dev_name = name; > - switch (inst[i].flags & IRQ_RESOURCE_TYPE) { > - case IRQ_RESOURCE_GPIO: > - ret = acpi_dev_gpio_irq_get(adev, inst[i].irq_idx); > - if (ret < 0) { > - dev_err(dev, "Error requesting irq at index %d: %d\n", > - inst[i].irq_idx, ret); > - goto error; > - } > - board_info.irq = ret; > - break; > - case IRQ_RESOURCE_APIC: > - ret = platform_get_irq(pdev, inst[i].irq_idx); > - if (ret < 0) { > - dev_dbg(dev, "Error requesting irq at index %d: %d\n", > - inst[i].irq_idx, ret); > - goto error; > - } > - board_info.irq = ret; > - break; > - default: > - board_info.irq = 0; > - break; > - } > + > + ret = bmi_get_irq(pdev, adev, &inst_array[i]); > + if (ret < 0) > + goto error; > + board_info.irq = ret; > + > bmi->i2c_devs[i] = i2c_acpi_new_device(dev, i, &board_info); > if (IS_ERR(bmi->i2c_devs[i])) { > ret = dev_err_probe(dev, PTR_ERR(bmi->i2c_devs[i]), > "Error creating i2c-client, idx %d\n", i); > goto error; > } > + bmi->i2c_num++; > } > - if (i < bmi->i2c_num) { > + if (bmi->i2c_num < count) { > dev_err(dev, "Error finding driver, idx %d\n", i); > ret = -ENODEV; > goto error; > } > > - platform_set_drvdata(pdev, bmi); > - return 0; > + dev_info(dev, "Instantiate %d I2C devices.\n", bmi->i2c_num); > > + return bmi->i2c_num; > error: > - while (--i >= 0) > - i2c_unregister_device(bmi->i2c_devs[i]); > + dev_err_probe(dev, ret, "I2C error %d\n", ret); All the ways to get here already log a better error msg, please drop this. > + bmi_devs_unregister(bmi); > + > + return ret; > +} > + > +static int bmi_probe(struct platform_device *pdev) > +{ > + const struct bmi_instance *inst_array; > + struct device *dev = &pdev->dev; > + struct acpi_device *adev; > + struct bmi *bmi; > + int ret; > + > + inst_array = device_get_match_data(dev); > + if (!inst_array) { > + dev_err(dev, "Error ACPI match data is missing\n"); > + return -ENODEV; > + } > + > + adev = ACPI_COMPANION(dev); > + if (!adev) > + return -ENODEV; > + > + bmi = devm_kzalloc(dev, sizeof(*bmi), GFP_KERNEL); > + if (!bmi) > + return -ENOMEM; > + > + platform_set_drvdata(pdev, bmi); > + > + ret = bmi_i2c_probe(pdev, adev, bmi, inst_array); > + if (ret > 0) > + return 0; > + if (ret == 0) > + ret = -ENODEV; > > return ret; > } > @@ -115,10 +159,8 @@ static int bmi_probe(struct platform_device *pdev) > static int bmi_remove(struct platform_device *pdev) > { > struct bmi *bmi = platform_get_drvdata(pdev); > - int i; > > - for (i = 0; i < bmi->i2c_num; i++) > - i2c_unregister_device(bmi->i2c_devs[i]); > + bmi_devs_unregister(bmi); > > return 0; > } > Otherwise this looks good to me, with my 2 minor remarsk addressed: Reviewed-by: Hans de Goede <hdegoede@redhat.com> Regards, Hans
Hi, On 1/20/22 14:43, Stefan Binding wrote: > From: Lucas Tanure <tanureal@opensource.cirrus.com> > > Reorganize I2C functions to accommodate SPI support > Split the probe and factor out parts of the code > that will be used in the SPI support > > Signed-off-by: Lucas Tanure <tanureal@opensource.cirrus.com> > Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com> > --- > drivers/platform/x86/bus-multi-instantiate.c | 150 ++++++++++++------- > 1 file changed, 96 insertions(+), 54 deletions(-) > > diff --git a/drivers/platform/x86/bus-multi-instantiate.c b/drivers/platform/x86/bus-multi-instantiate.c > index 982dfecfd27c..50f1540762e9 100644 > --- a/drivers/platform/x86/bus-multi-instantiate.c > +++ b/drivers/platform/x86/bus-multi-instantiate.c > @@ -29,85 +29,129 @@ struct bmi_instance { > > struct bmi { > int i2c_num; > - struct i2c_client *i2c_devs[]; > + struct i2c_client **i2c_devs; > }; > > -static int bmi_probe(struct platform_device *pdev) > +static int bmi_get_irq(struct platform_device *pdev, struct acpi_device *adev, > + const struct bmi_instance *inst) > +{ > + int ret; > + > + switch (inst->flags & IRQ_RESOURCE_TYPE) { > + case IRQ_RESOURCE_GPIO: > + ret = acpi_dev_gpio_irq_get(adev, inst->irq_idx); > + break; > + case IRQ_RESOURCE_APIC: > + ret = platform_get_irq(pdev, inst->irq_idx); > + break; > + default: > + ret = 0; > + break; > + } > + > + if (ret < 0) > + dev_err_probe(&pdev->dev, ret, "Error requesting irq at index %d: %d\n", > + inst->irq_idx, ret); > + > + return ret; > +} > + > +static void bmi_devs_unregister(struct bmi *bmi) > +{ > + while (bmi->i2c_num > 0) > + i2c_unregister_device(bmi->i2c_devs[--bmi->i2c_num]); > +} > + > +/** > + * bmi_i2c_probe - Instantiate multiple I2C devices from inst array > + * @pdev: Platform device > + * @adev: ACPI device > + * @bmi: Internal struct for Bus multi instantiate driver > + * @inst: Array of instances to probe > + * > + * Returns the number of I2C devices instantiate, Zero if none is found or a negative error code. > + */ > +static int bmi_i2c_probe(struct platform_device *pdev, struct acpi_device *adev, struct bmi *bmi, > + const struct bmi_instance *inst_array) > { > struct i2c_board_info board_info = {}; > - const struct bmi_instance *inst; > struct device *dev = &pdev->dev; > - struct acpi_device *adev; > - struct bmi *bmi; > char name[32]; > - int i, ret; > + int i, ret = 0, count; > > - inst = device_get_match_data(dev); > - if (!inst) { > - dev_err(dev, "Error ACPI match data is missing\n"); > - return -ENODEV; > - } > - > - adev = ACPI_COMPANION(dev); > - > - /* Count number of clients to instantiate */ > ret = i2c_acpi_client_count(adev); > - if (ret < 0) > + if (ret <= 0) > return ret; > + count = ret; > > - bmi = devm_kmalloc(dev, struct_size(bmi, i2c_devs, ret), GFP_KERNEL); > - if (!bmi) > + bmi->i2c_devs = devm_kcalloc(dev, count, sizeof(*bmi->i2c_devs), GFP_KERNEL); > + if (!bmi->i2c_devs) > return -ENOMEM; > > - bmi->i2c_num = ret; > - > - for (i = 0; i < bmi->i2c_num && inst[i].type; i++) { > + for (i = 0; i < count && inst_array[i].type; i++) { > memset(&board_info, 0, sizeof(board_info)); > - strlcpy(board_info.type, inst[i].type, I2C_NAME_SIZE); > - snprintf(name, sizeof(name), "%s-%s.%d", dev_name(dev), inst[i].type, i); > + strscpy(board_info.type, inst_array[i].type, I2C_NAME_SIZE); > + snprintf(name, sizeof(name), "%s-%s.%d", dev_name(dev), inst_array[i].type, i); > board_info.dev_name = name; > - switch (inst[i].flags & IRQ_RESOURCE_TYPE) { > - case IRQ_RESOURCE_GPIO: > - ret = acpi_dev_gpio_irq_get(adev, inst[i].irq_idx); > - if (ret < 0) { > - dev_err(dev, "Error requesting irq at index %d: %d\n", > - inst[i].irq_idx, ret); > - goto error; > - } > - board_info.irq = ret; > - break; > - case IRQ_RESOURCE_APIC: > - ret = platform_get_irq(pdev, inst[i].irq_idx); > - if (ret < 0) { > - dev_dbg(dev, "Error requesting irq at index %d: %d\n", > - inst[i].irq_idx, ret); > - goto error; > - } > - board_info.irq = ret; > - break; > - default: > - board_info.irq = 0; > - break; > - } > + > + ret = bmi_get_irq(pdev, adev, &inst_array[i]); > + if (ret < 0) > + goto error; > + board_info.irq = ret; > + > bmi->i2c_devs[i] = i2c_acpi_new_device(dev, i, &board_info); > if (IS_ERR(bmi->i2c_devs[i])) { > ret = dev_err_probe(dev, PTR_ERR(bmi->i2c_devs[i]), > "Error creating i2c-client, idx %d\n", i); > goto error; > } > + bmi->i2c_num++; > } > - if (i < bmi->i2c_num) { > + if (bmi->i2c_num < count) { > dev_err(dev, "Error finding driver, idx %d\n", i); > ret = -ENODEV; > goto error; > } > > - platform_set_drvdata(pdev, bmi); > - return 0; > + dev_info(dev, "Instantiate %d I2C devices.\n", bmi->i2c_num); Bonus nitpick, please change this to: dev_info(dev, "Instantiated %d I2C devices.\n", bmi->i2c_num); IOW do s/Instantiate/Instantiated/ Regards, Hans > > + return bmi->i2c_num; > error: > - while (--i >= 0) > - i2c_unregister_device(bmi->i2c_devs[i]); > + dev_err_probe(dev, ret, "I2C error %d\n", ret); > + bmi_devs_unregister(bmi); > + > + return ret; > +} > + > +static int bmi_probe(struct platform_device *pdev) > +{ > + const struct bmi_instance *inst_array; > + struct device *dev = &pdev->dev; > + struct acpi_device *adev; > + struct bmi *bmi; > + int ret; > + > + inst_array = device_get_match_data(dev); > + if (!inst_array) { > + dev_err(dev, "Error ACPI match data is missing\n"); > + return -ENODEV; > + } > + > + adev = ACPI_COMPANION(dev); > + if (!adev) > + return -ENODEV; > + > + bmi = devm_kzalloc(dev, sizeof(*bmi), GFP_KERNEL); > + if (!bmi) > + return -ENOMEM; > + > + platform_set_drvdata(pdev, bmi); > + > + ret = bmi_i2c_probe(pdev, adev, bmi, inst_array); > + if (ret > 0) > + return 0; > + if (ret == 0) > + ret = -ENODEV; > > return ret; > } > @@ -115,10 +159,8 @@ static int bmi_probe(struct platform_device *pdev) > static int bmi_remove(struct platform_device *pdev) > { > struct bmi *bmi = platform_get_drvdata(pdev); > - int i; > > - for (i = 0; i < bmi->i2c_num; i++) > - i2c_unregister_device(bmi->i2c_devs[i]); > + bmi_devs_unregister(bmi); > > return 0; > } >
diff --git a/drivers/platform/x86/bus-multi-instantiate.c b/drivers/platform/x86/bus-multi-instantiate.c index 982dfecfd27c..50f1540762e9 100644 --- a/drivers/platform/x86/bus-multi-instantiate.c +++ b/drivers/platform/x86/bus-multi-instantiate.c @@ -29,85 +29,129 @@ struct bmi_instance { struct bmi { int i2c_num; - struct i2c_client *i2c_devs[]; + struct i2c_client **i2c_devs; }; -static int bmi_probe(struct platform_device *pdev) +static int bmi_get_irq(struct platform_device *pdev, struct acpi_device *adev, + const struct bmi_instance *inst) +{ + int ret; + + switch (inst->flags & IRQ_RESOURCE_TYPE) { + case IRQ_RESOURCE_GPIO: + ret = acpi_dev_gpio_irq_get(adev, inst->irq_idx); + break; + case IRQ_RESOURCE_APIC: + ret = platform_get_irq(pdev, inst->irq_idx); + break; + default: + ret = 0; + break; + } + + if (ret < 0) + dev_err_probe(&pdev->dev, ret, "Error requesting irq at index %d: %d\n", + inst->irq_idx, ret); + + return ret; +} + +static void bmi_devs_unregister(struct bmi *bmi) +{ + while (bmi->i2c_num > 0) + i2c_unregister_device(bmi->i2c_devs[--bmi->i2c_num]); +} + +/** + * bmi_i2c_probe - Instantiate multiple I2C devices from inst array + * @pdev: Platform device + * @adev: ACPI device + * @bmi: Internal struct for Bus multi instantiate driver + * @inst: Array of instances to probe + * + * Returns the number of I2C devices instantiate, Zero if none is found or a negative error code. + */ +static int bmi_i2c_probe(struct platform_device *pdev, struct acpi_device *adev, struct bmi *bmi, + const struct bmi_instance *inst_array) { struct i2c_board_info board_info = {}; - const struct bmi_instance *inst; struct device *dev = &pdev->dev; - struct acpi_device *adev; - struct bmi *bmi; char name[32]; - int i, ret; + int i, ret = 0, count; - inst = device_get_match_data(dev); - if (!inst) { - dev_err(dev, "Error ACPI match data is missing\n"); - return -ENODEV; - } - - adev = ACPI_COMPANION(dev); - - /* Count number of clients to instantiate */ ret = i2c_acpi_client_count(adev); - if (ret < 0) + if (ret <= 0) return ret; + count = ret; - bmi = devm_kmalloc(dev, struct_size(bmi, i2c_devs, ret), GFP_KERNEL); - if (!bmi) + bmi->i2c_devs = devm_kcalloc(dev, count, sizeof(*bmi->i2c_devs), GFP_KERNEL); + if (!bmi->i2c_devs) return -ENOMEM; - bmi->i2c_num = ret; - - for (i = 0; i < bmi->i2c_num && inst[i].type; i++) { + for (i = 0; i < count && inst_array[i].type; i++) { memset(&board_info, 0, sizeof(board_info)); - strlcpy(board_info.type, inst[i].type, I2C_NAME_SIZE); - snprintf(name, sizeof(name), "%s-%s.%d", dev_name(dev), inst[i].type, i); + strscpy(board_info.type, inst_array[i].type, I2C_NAME_SIZE); + snprintf(name, sizeof(name), "%s-%s.%d", dev_name(dev), inst_array[i].type, i); board_info.dev_name = name; - switch (inst[i].flags & IRQ_RESOURCE_TYPE) { - case IRQ_RESOURCE_GPIO: - ret = acpi_dev_gpio_irq_get(adev, inst[i].irq_idx); - if (ret < 0) { - dev_err(dev, "Error requesting irq at index %d: %d\n", - inst[i].irq_idx, ret); - goto error; - } - board_info.irq = ret; - break; - case IRQ_RESOURCE_APIC: - ret = platform_get_irq(pdev, inst[i].irq_idx); - if (ret < 0) { - dev_dbg(dev, "Error requesting irq at index %d: %d\n", - inst[i].irq_idx, ret); - goto error; - } - board_info.irq = ret; - break; - default: - board_info.irq = 0; - break; - } + + ret = bmi_get_irq(pdev, adev, &inst_array[i]); + if (ret < 0) + goto error; + board_info.irq = ret; + bmi->i2c_devs[i] = i2c_acpi_new_device(dev, i, &board_info); if (IS_ERR(bmi->i2c_devs[i])) { ret = dev_err_probe(dev, PTR_ERR(bmi->i2c_devs[i]), "Error creating i2c-client, idx %d\n", i); goto error; } + bmi->i2c_num++; } - if (i < bmi->i2c_num) { + if (bmi->i2c_num < count) { dev_err(dev, "Error finding driver, idx %d\n", i); ret = -ENODEV; goto error; } - platform_set_drvdata(pdev, bmi); - return 0; + dev_info(dev, "Instantiate %d I2C devices.\n", bmi->i2c_num); + return bmi->i2c_num; error: - while (--i >= 0) - i2c_unregister_device(bmi->i2c_devs[i]); + dev_err_probe(dev, ret, "I2C error %d\n", ret); + bmi_devs_unregister(bmi); + + return ret; +} + +static int bmi_probe(struct platform_device *pdev) +{ + const struct bmi_instance *inst_array; + struct device *dev = &pdev->dev; + struct acpi_device *adev; + struct bmi *bmi; + int ret; + + inst_array = device_get_match_data(dev); + if (!inst_array) { + dev_err(dev, "Error ACPI match data is missing\n"); + return -ENODEV; + } + + adev = ACPI_COMPANION(dev); + if (!adev) + return -ENODEV; + + bmi = devm_kzalloc(dev, sizeof(*bmi), GFP_KERNEL); + if (!bmi) + return -ENOMEM; + + platform_set_drvdata(pdev, bmi); + + ret = bmi_i2c_probe(pdev, adev, bmi, inst_array); + if (ret > 0) + return 0; + if (ret == 0) + ret = -ENODEV; return ret; } @@ -115,10 +159,8 @@ static int bmi_probe(struct platform_device *pdev) static int bmi_remove(struct platform_device *pdev) { struct bmi *bmi = platform_get_drvdata(pdev); - int i; - for (i = 0; i < bmi->i2c_num; i++) - i2c_unregister_device(bmi->i2c_devs[i]); + bmi_devs_unregister(bmi); return 0; }