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Wysocki" , Len Brown , Hans de Goede , Mark Gross , Jaroslav Kysela , Takashi Iwai Subject: [PATCH v5 6/9] platform/x86: serial-multi-instantiate: Reorganize I2C functions Date: Fri, 21 Jan 2022 14:32:51 +0000 Message-ID: <20220121143254.6432-7-sbinding@opensource.cirrus.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220121143254.6432-1-sbinding@opensource.cirrus.com> References: <20220121143254.6432-1-sbinding@opensource.cirrus.com> MIME-Version: 1.0 X-Proofpoint-GUID: yKUlHO2muZVFcRcGn2A--9XhS6UBVLu5 X-Proofpoint-ORIG-GUID: yKUlHO2muZVFcRcGn2A--9XhS6UBVLu5 X-Proofpoint-Spam-Reason: safe Cc: alsa-devel@alsa-project.org, Lucas Tanure , patches@opensource.cirrus.com, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-acpi@vger.kernel.org, Stefan Binding , linux-spi@vger.kernel.org X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" From: Lucas Tanure 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 Signed-off-by: Stefan Binding --- .../platform/x86/serial-multi-instantiate.c | 145 +++++++++++------- 1 file changed, 90 insertions(+), 55 deletions(-) diff --git a/drivers/platform/x86/serial-multi-instantiate.c b/drivers/platform/x86/serial-multi-instantiate.c index 32fb3f904547..162ec20a861a 100644 --- a/drivers/platform/x86/serial-multi-instantiate.c +++ b/drivers/platform/x86/serial-multi-instantiate.c @@ -29,96 +29,131 @@ struct smi_instance { struct smi { int i2c_num; - struct i2c_client *i2c_devs[]; + struct i2c_client **i2c_devs; }; -static int smi_probe(struct platform_device *pdev) +static int smi_get_irq(struct platform_device *pdev, struct acpi_device *adev, + const struct smi_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 smi_devs_unregister(struct smi *smi) +{ + while (smi->i2c_num > 0) + i2c_unregister_device(smi->i2c_devs[--smi->i2c_num]); +} + +/** + * smi_i2c_probe - Instantiate multiple I2C devices from inst array + * @pdev: Platform device + * @adev: ACPI device + * @smi: Internal struct for Serial 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 smi_i2c_probe(struct platform_device *pdev, struct acpi_device *adev, struct smi *smi, + const struct smi_instance *inst_array) { struct i2c_board_info board_info = {}; - const struct smi_instance *inst; struct device *dev = &pdev->dev; - struct acpi_device *adev; - struct smi *smi; char name[32]; - int i, ret; + int i, ret, 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) - return ret; + if (ret <= 0) + return ret == 0 ? -ENODEV : ret; - smi = devm_kmalloc(dev, struct_size(smi, i2c_devs, ret), GFP_KERNEL); - if (!smi) - return -ENOMEM; + count = ret; - smi->i2c_num = ret; + smi->i2c_devs = devm_kcalloc(dev, count, sizeof(*smi->i2c_devs), GFP_KERNEL); + if (!smi->i2c_devs) + return -ENOMEM; - for (i = 0; i < smi->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 = smi_get_irq(pdev, adev, &inst_array[i]); + if (ret < 0) + goto error; + board_info.irq = ret; + smi->i2c_devs[i] = i2c_acpi_new_device(dev, i, &board_info); if (IS_ERR(smi->i2c_devs[i])) { ret = dev_err_probe(dev, PTR_ERR(smi->i2c_devs[i]), "Error creating i2c-client, idx %d\n", i); goto error; } + smi->i2c_num++; } - if (i < smi->i2c_num) { + if (smi->i2c_num < count) { dev_err(dev, "Error finding driver, idx %d\n", i); ret = -ENODEV; goto error; } - platform_set_drvdata(pdev, smi); - return 0; + dev_info(dev, "Instantiated %d I2C devices.\n", smi->i2c_num); + return 0; error: - while (--i >= 0) - i2c_unregister_device(smi->i2c_devs[i]); + smi_devs_unregister(smi); return ret; } +static int smi_probe(struct platform_device *pdev) +{ + const struct smi_instance *inst_array; + struct device *dev = &pdev->dev; + struct acpi_device *adev; + struct smi *smi; + + 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; + + smi = devm_kzalloc(dev, sizeof(*smi), GFP_KERNEL); + if (!smi) + return -ENOMEM; + + platform_set_drvdata(pdev, smi); + + return smi_i2c_probe(pdev, adev, smi, inst_array); +} + static int smi_remove(struct platform_device *pdev) { struct smi *smi = platform_get_drvdata(pdev); - int i; - for (i = 0; i < smi->i2c_num; i++) - i2c_unregister_device(smi->i2c_devs[i]); + smi_devs_unregister(smi); return 0; }