[v2,3/4] mfd: add support for Allwinner SoCs ADC

Message ID	1468576754-3273-4-git-send-email-quentin.schulz@free-electrons.com
State	New
Headers	show Delivered-To: patch@linaro.org Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; From: Quentin Schulz <quentin.schulz@free-electrons.com> To: jdelvare@suse.com, linux@roeck-us.net, jic23@kernel.org, knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net, maxime.ripard@free-electrons.com, wens@csie.org, lee.jones@linaro.org Cc: Quentin Schulz <quentin.schulz@free-electrons.com>, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-iio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, thomas.petazzoni@free-electrons.com, antoine.tenart@free-electrons.com Subject: [PATCH v2 3/4] mfd: add support for Allwinner SoCs ADC Date: Fri, 15 Jul 2016 11:59:13 +0200 Message-Id: <1468576754-3273-4-git-send-email-quentin.schulz@free-electrons.com> In-Reply-To: <1468576754-3273-1-git-send-email-quentin.schulz@free-electrons.com> References: <1468576754-3273-1-git-send-email-quentin.schulz@free-electrons.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 1bcf601..67b55d0 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -82,6 +82,20 @@ config MFD_ATMEL_FLEXCOM by the probe function of this MFD driver according to a device tree property. +config MFD_SUNXI_ADC + tristate "ADC MFD core driver for sunxi platforms" + select MFD_CORE + select REGMAP_MMIO + help + Select this to get support for Allwinner SoCs (A10, A13 and A31) ADC. + This driver will only map the hardware interrupt and registers, you + have to select individual drivers based on this MFD to be able to use + the ADC or the thermal sensor. This will try to probe the ADC driver + sunxi-gpadc-iio and the hwmon driver iio_hwmon. + + To compile this driver as a module, choose M here: the + module will be called sunxi-gpadc-mfd. + config MFD_ATMEL_HLCDC tristate "Atmel HLCDC (High-end LCD Controller)" select MFD_CORE diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 42a66e1..dcf43cd 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -201,6 +201,8 @@ obj-$(CONFIG_MFD_DLN2) += dln2.o obj-$(CONFIG_MFD_RT5033) += rt5033.o obj-$(CONFIG_MFD_SKY81452) += sky81452.o +obj-$(CONFIG_MFD_SUNXI_ADC) += sunxi-gpadc-mfd.o + intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o intel-soc-pmic-$(CONFIG_INTEL_PMC_IPC) += intel_soc_pmic_bxtwc.o obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o diff --git a/drivers/mfd/sunxi-gpadc-mfd.c b/drivers/mfd/sunxi-gpadc-mfd.c new file mode 100644 index 0000000..f0005a6 --- /dev/null +++ b/drivers/mfd/sunxi-gpadc-mfd.c @@ -0,0 +1,197 @@ +/* ADC MFD core driver for sunxi platforms + * + * Copyright (c) 2016 Quentin Schulz <quentin.schulz@free-electrons> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ + +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mfd/core.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/of_irq.h> +#include <linux/regmap.h> + +#include <linux/mfd/sunxi-gpadc-mfd.h> + +#define SUNXI_IRQ_FIFO_DATA 0 +#define SUNXI_IRQ_TEMP_DATA 1 + +static struct resource adc_resources[] = { + { + .name = "FIFO_DATA_PENDING", + .start = SUNXI_IRQ_FIFO_DATA, + .end = SUNXI_IRQ_FIFO_DATA, + .flags = IORESOURCE_IRQ, + }, { + .name = "TEMP_DATA_PENDING", + .start = SUNXI_IRQ_TEMP_DATA, + .end = SUNXI_IRQ_TEMP_DATA, + .flags = IORESOURCE_IRQ, + }, +}; + +static const struct regmap_irq sunxi_gpadc_mfd_regmap_irq[] = { + REGMAP_IRQ_REG(SUNXI_IRQ_FIFO_DATA, 0, BIT(16)), + REGMAP_IRQ_REG(SUNXI_IRQ_TEMP_DATA, 0, BIT(18)), +}; + +static const struct regmap_irq_chip sunxi_gpadc_mfd_regmap_irq_chip = { + .name = "sunxi_gpadc_mfd_irq_chip", + .status_base = SUNXI_GPADC_TP_INT_FIFOS, + .ack_base = SUNXI_GPADC_TP_INT_FIFOS, + .mask_base = SUNXI_GPADC_TP_INT_FIFOC, + .init_ack_masked = true, + .mask_invert = true, + .irqs = sunxi_gpadc_mfd_regmap_irq, + .num_irqs = ARRAY_SIZE(sunxi_gpadc_mfd_regmap_irq), + .num_regs = 1, +}; + +static struct mfd_cell sun4i_gpadc_mfd_cells[] = { + { + .name = "sun4i-a10-gpadc-iio", + .resources = adc_resources, + .num_resources = ARRAY_SIZE(adc_resources), + }, { + .name = "iio_hwmon", + } +}; + +static struct mfd_cell sun5i_gpadc_mfd_cells[] = { + { + .name = "sun5i-a13-gpadc-iio", + .resources = adc_resources, + .num_resources = ARRAY_SIZE(adc_resources), + }, { + .name = "iio_hwmon", + }, +}; + +static struct mfd_cell sun6i_gpadc_mfd_cells[] = { + { + .name = "sun6i-a31-gpadc-iio", + .resources = adc_resources, + .num_resources = ARRAY_SIZE(adc_resources), + }, { + .name = "iio_hwmon", + }, +}; + +static const struct regmap_config sunxi_gpadc_mfd_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .fast_io = true, +}; + +static int sunxi_gpadc_mfd_probe(struct platform_device *pdev) +{ + struct sunxi_gpadc_mfd_dev *sunxi_gpadc_mfd_dev = NULL; + struct resource *mem = NULL; + unsigned int irq; + int ret; + + sunxi_gpadc_mfd_dev = devm_kzalloc(&pdev->dev, + sizeof(*sunxi_gpadc_mfd_dev), + GFP_KERNEL); + if (!sunxi_gpadc_mfd_dev) + return -ENOMEM; + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + sunxi_gpadc_mfd_dev->regs = devm_ioremap_resource(&pdev->dev, mem); + if (IS_ERR(sunxi_gpadc_mfd_dev->regs)) + return PTR_ERR(sunxi_gpadc_mfd_dev->regs); + + sunxi_gpadc_mfd_dev->dev = &pdev->dev; + dev_set_drvdata(sunxi_gpadc_mfd_dev->dev, sunxi_gpadc_mfd_dev); + + sunxi_gpadc_mfd_dev->regmap = + devm_regmap_init_mmio(sunxi_gpadc_mfd_dev->dev, + sunxi_gpadc_mfd_dev->regs, + &sunxi_gpadc_mfd_regmap_config); + if (IS_ERR(sunxi_gpadc_mfd_dev->regmap)) { + ret = PTR_ERR(sunxi_gpadc_mfd_dev->regmap); + dev_err(&pdev->dev, "failed to init regmap: %d\n", ret); + return ret; + } + + irq = platform_get_irq(pdev, 0); + ret = regmap_add_irq_chip(sunxi_gpadc_mfd_dev->regmap, irq, + IRQF_ONESHOT, 0, + &sunxi_gpadc_mfd_regmap_irq_chip, + &sunxi_gpadc_mfd_dev->regmap_irqc); + if (ret) { + dev_err(&pdev->dev, "failed to add irq chip: %d\n", ret); + return ret; + } + + if (of_device_is_compatible(pdev->dev.of_node, + "allwinner,sun4i-a10-ts")) + ret = mfd_add_devices(sunxi_gpadc_mfd_dev->dev, 0, + sun4i_gpadc_mfd_cells, + ARRAY_SIZE(sun4i_gpadc_mfd_cells), NULL, + 0, NULL); + else if (of_device_is_compatible(pdev->dev.of_node, + "allwinner,sun5i-a13-ts")) + ret = mfd_add_devices(sunxi_gpadc_mfd_dev->dev, 0, + sun5i_gpadc_mfd_cells, + ARRAY_SIZE(sun5i_gpadc_mfd_cells), NULL, + 0, NULL); + else if (of_device_is_compatible(pdev->dev.of_node, + "allwinner,sun6i-a31-ts")) + ret = mfd_add_devices(sunxi_gpadc_mfd_dev->dev, 0, + sun6i_gpadc_mfd_cells, + ARRAY_SIZE(sun6i_gpadc_mfd_cells), NULL, + 0, NULL); + + if (ret) { + dev_err(&pdev->dev, "failed to add MFD devices: %d\n", ret); + regmap_del_irq_chip(irq, sunxi_gpadc_mfd_dev->regmap_irqc); + return ret; + } + + dev_info(&pdev->dev, "successfully loaded\n"); + + return 0; +} + +static int sunxi_gpadc_mfd_remove(struct platform_device *pdev) +{ + struct sunxi_gpadc_mfd_dev *sunxi_gpadc_mfd_dev; + unsigned int irq; + + irq = platform_get_irq(pdev, 0); + mfd_remove_devices(&pdev->dev); + sunxi_gpadc_mfd_dev = dev_get_drvdata(&pdev->dev); + regmap_del_irq_chip(irq, sunxi_gpadc_mfd_dev->regmap_irqc); + + return 0; +} + +static const struct of_device_id sunxi_gpadc_mfd_of_match[] = { + { .compatible = "allwinner,sun4i-a10-ts" }, + { .compatible = "allwinner,sun5i-a13-ts" }, + { .compatible = "allwinner,sun6i-a31-ts" }, + { /* sentinel */ } +}; + +MODULE_DEVICE_TABLE(of, sunxi_gpadc_mfd_of_match); + +static struct platform_driver sunxi_gpadc_mfd_driver = { + .driver = { + .name = "sunxi-adc-mfd", + .of_match_table = of_match_ptr(sunxi_gpadc_mfd_of_match), + }, + .probe = sunxi_gpadc_mfd_probe, + .remove = sunxi_gpadc_mfd_remove, +}; + +module_platform_driver(sunxi_gpadc_mfd_driver); + +MODULE_DESCRIPTION("ADC MFD core driver for sunxi platforms"); +MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/mfd/sunxi-gpadc-mfd.h b/include/linux/mfd/sunxi-gpadc-mfd.h new file mode 100644 index 0000000..7155845 --- /dev/null +++ b/include/linux/mfd/sunxi-gpadc-mfd.h @@ -0,0 +1,23 @@ +/* Header of ADC MFD core driver for sunxi platforms + * + * Copyright (c) 2016 Quentin Schulz <quentin.schulz@free-electrons> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ + +#ifndef __SUNXI_GPADC_MFD__H__ +#define __SUNXI_GPADC_MFD__H__ + +#define SUNXI_GPADC_TP_INT_FIFOC 0x10 +#define SUNXI_GPADC_TP_INT_FIFOS 0x14 + +struct sunxi_gpadc_mfd_dev { + struct device *dev; + struct regmap *regmap; + struct regmap_irq_chip_data *regmap_irqc; + void __iomem *regs; +}; + +#endif

[v2,3/4] mfd: add support for Allwinner SoCs ADC

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