| From 52dc4fbaf3f5b42ab0faa58ca2866523a5bccb6f Mon Sep 17 00:00:00 2001 |
| From: Marek Vasut <marek.vasut+renesas@gmail.com> |
| Date: Sat, 28 Jan 2017 00:08:37 +0100 |
| Subject: [PATCH 112/255] iio: adc: Add Renesas GyroADC driver |
| |
| Add IIO driver for the Renesas RCar GyroADC block. This block is a |
| simple 4/8-channel ADC which samples 12/15/24 bits of data every |
| cycle from all channels. |
| |
| Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com> |
| Cc: Geert Uytterhoeven <geert+renesas@glider.be> |
| Cc: Simon Horman <horms+renesas@verge.net.au> |
| Cc: Jonathan Cameron <jic23@kernel.org> |
| Cc: linux-renesas-soc@vger.kernel.org |
| Cc: Wolfram Sang <wsa@the-dreams.de> |
| Signed-off-by: Jonathan Cameron <jic23@kernel.org> |
| (cherry picked from commit 059c53b3232960cfd38cc46de0a7bedd642021f5) |
| Signed-off-by: Simon Horman <horms+renesas@verge.net.au> |
| --- |
| MAINTAINERS | 6 |
| drivers/iio/adc/Kconfig | 13 |
| drivers/iio/adc/Makefile | 1 |
| drivers/iio/adc/rcar-gyroadc.c | 631 +++++++++++++++++++++++++++++++++++++++++ |
| 4 files changed, 651 insertions(+) |
| create mode 100644 drivers/iio/adc/rcar-gyroadc.c |
| |
| --- a/MAINTAINERS |
| +++ b/MAINTAINERS |
| @@ -10225,6 +10225,12 @@ L: linux-renesas-soc@vger.kernel.org |
| F: drivers/net/ethernet/renesas/ |
| F: include/linux/sh_eth.h |
| |
| +RENESAS R-CAR GYROADC DRIVER |
| +M: Marek Vasut <marek.vasut@gmail.com> |
| +L: linux-iio@vger.kernel.org |
| +S: Supported |
| +F: drivers/iio/adc/rcar_gyro_adc.c |
| + |
| RENESAS USB2 PHY DRIVER |
| M: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> |
| L: linux-renesas-soc@vger.kernel.org |
| --- a/drivers/iio/adc/Kconfig |
| +++ b/drivers/iio/adc/Kconfig |
| @@ -408,6 +408,19 @@ config QCOM_SPMI_VADC |
| To compile this driver as a module, choose M here: the module will |
| be called qcom-spmi-vadc. |
| |
| +config RCAR_GYRO_ADC |
| + tristate "Renesas R-Car GyroADC driver" |
| + depends on ARCH_RCAR_GEN2 || (ARM && COMPILE_TEST) |
| + help |
| + Say yes here to build support for the GyroADC found in Renesas |
| + R-Car Gen2 SoCs. This block is a simple SPI offload engine for |
| + reading data out of attached compatible ADCs in a round-robin |
| + fashion. Up to 4 or 8 ADC channels are supported by this block, |
| + depending on which ADCs are attached. |
| + |
| + To compile this driver as a module, choose M here: the |
| + module will be called rcar-gyroadc. |
| + |
| config ROCKCHIP_SARADC |
| tristate "Rockchip SARADC driver" |
| depends on ARCH_ROCKCHIP || (ARM && COMPILE_TEST) |
| --- a/drivers/iio/adc/Makefile |
| +++ b/drivers/iio/adc/Makefile |
| @@ -39,6 +39,7 @@ obj-$(CONFIG_NAU7802) += nau7802.o |
| obj-$(CONFIG_PALMAS_GPADC) += palmas_gpadc.o |
| obj-$(CONFIG_QCOM_SPMI_IADC) += qcom-spmi-iadc.o |
| obj-$(CONFIG_QCOM_SPMI_VADC) += qcom-spmi-vadc.o |
| +obj-$(CONFIG_RCAR_GYRO_ADC) += rcar-gyroadc.o |
| obj-$(CONFIG_ROCKCHIP_SARADC) += rockchip_saradc.o |
| obj-$(CONFIG_STX104) += stx104.o |
| obj-$(CONFIG_TI_ADC081C) += ti-adc081c.o |
| --- /dev/null |
| +++ b/drivers/iio/adc/rcar-gyroadc.c |
| @@ -0,0 +1,631 @@ |
| +/* |
| + * Renesas R-Car GyroADC driver |
| + * |
| + * Copyright 2016 Marek Vasut <marek.vasut@gmail.com> |
| + * |
| + * This program is free software; you can redistribute it and/or modify |
| + * it under the terms of the GNU General Public License as published by |
| + * the Free Software Foundation; either version 2 of the License, or |
| + * (at your option) any later version. |
| + * |
| + * This program is distributed in the hope that it will be useful, |
| + * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| + * GNU General Public License for more details. |
| + */ |
| + |
| +#include <linux/module.h> |
| +#include <linux/platform_device.h> |
| +#include <linux/delay.h> |
| +#include <linux/kernel.h> |
| +#include <linux/slab.h> |
| +#include <linux/io.h> |
| +#include <linux/clk.h> |
| +#include <linux/of.h> |
| +#include <linux/of_irq.h> |
| +#include <linux/regulator/consumer.h> |
| +#include <linux/of_platform.h> |
| +#include <linux/err.h> |
| +#include <linux/pm_runtime.h> |
| + |
| +#include <linux/iio/iio.h> |
| +#include <linux/iio/sysfs.h> |
| +#include <linux/iio/trigger.h> |
| + |
| +#define DRIVER_NAME "rcar-gyroadc" |
| + |
| +/* GyroADC registers. */ |
| +#define RCAR_GYROADC_MODE_SELECT 0x00 |
| +#define RCAR_GYROADC_MODE_SELECT_1_MB88101A 0x0 |
| +#define RCAR_GYROADC_MODE_SELECT_2_ADCS7476 0x1 |
| +#define RCAR_GYROADC_MODE_SELECT_3_MAX1162 0x3 |
| + |
| +#define RCAR_GYROADC_START_STOP 0x04 |
| +#define RCAR_GYROADC_START_STOP_START BIT(0) |
| + |
| +#define RCAR_GYROADC_CLOCK_LENGTH 0x08 |
| +#define RCAR_GYROADC_1_25MS_LENGTH 0x0c |
| + |
| +#define RCAR_GYROADC_REALTIME_DATA(ch) (0x10 + ((ch) * 4)) |
| +#define RCAR_GYROADC_100MS_ADDED_DATA(ch) (0x30 + ((ch) * 4)) |
| +#define RCAR_GYROADC_10MS_AVG_DATA(ch) (0x50 + ((ch) * 4)) |
| + |
| +#define RCAR_GYROADC_FIFO_STATUS 0x70 |
| +#define RCAR_GYROADC_FIFO_STATUS_EMPTY(ch) BIT(0 + (4 * (ch))) |
| +#define RCAR_GYROADC_FIFO_STATUS_FULL(ch) BIT(1 + (4 * (ch))) |
| +#define RCAR_GYROADC_FIFO_STATUS_ERROR(ch) BIT(2 + (4 * (ch))) |
| + |
| +#define RCAR_GYROADC_INTR 0x74 |
| +#define RCAR_GYROADC_INTR_INT BIT(0) |
| + |
| +#define RCAR_GYROADC_INTENR 0x78 |
| +#define RCAR_GYROADC_INTENR_INTEN BIT(0) |
| + |
| +#define RCAR_GYROADC_SAMPLE_RATE 800 /* Hz */ |
| + |
| +#define RCAR_GYROADC_RUNTIME_PM_DELAY_MS 2000 |
| + |
| +enum rcar_gyroadc_model { |
| + RCAR_GYROADC_MODEL_DEFAULT, |
| + RCAR_GYROADC_MODEL_R8A7792, |
| +}; |
| + |
| +struct rcar_gyroadc { |
| + struct device *dev; |
| + void __iomem *regs; |
| + struct clk *iclk; |
| + struct regulator *vref[8]; |
| + unsigned int num_channels; |
| + enum rcar_gyroadc_model model; |
| + unsigned int mode; |
| + unsigned int sample_width; |
| +}; |
| + |
| +static void rcar_gyroadc_hw_init(struct rcar_gyroadc *priv) |
| +{ |
| + const unsigned long clk_mhz = clk_get_rate(priv->iclk) / 1000000; |
| + const unsigned long clk_mul = |
| + (priv->mode == RCAR_GYROADC_MODE_SELECT_1_MB88101A) ? 10 : 5; |
| + unsigned long clk_len = clk_mhz * clk_mul; |
| + |
| + /* |
| + * According to the R-Car Gen2 datasheet Rev. 1.01, Sept 08 2014, |
| + * page 77-7, clock length must be even number. If it's odd number, |
| + * add one. |
| + */ |
| + if (clk_len & 1) |
| + clk_len++; |
| + |
| + /* Stop the GyroADC. */ |
| + writel(0, priv->regs + RCAR_GYROADC_START_STOP); |
| + |
| + /* Disable IRQ on V2H. */ |
| + if (priv->model == RCAR_GYROADC_MODEL_R8A7792) |
| + writel(0, priv->regs + RCAR_GYROADC_INTENR); |
| + |
| + /* Set mode and timing. */ |
| + writel(priv->mode, priv->regs + RCAR_GYROADC_MODE_SELECT); |
| + writel(clk_len, priv->regs + RCAR_GYROADC_CLOCK_LENGTH); |
| + writel(clk_mhz * 1250, priv->regs + RCAR_GYROADC_1_25MS_LENGTH); |
| +} |
| + |
| +static void rcar_gyroadc_hw_start(struct rcar_gyroadc *priv) |
| +{ |
| + /* Start sampling. */ |
| + writel(RCAR_GYROADC_START_STOP_START, |
| + priv->regs + RCAR_GYROADC_START_STOP); |
| + |
| + /* |
| + * Wait for the first conversion to complete. This is longer than |
| + * the 1.25 mS in the datasheet because 1.25 mS is not enough for |
| + * the hardware to deliver the first sample and the hardware does |
| + * then return zeroes instead of valid data. |
| + */ |
| + mdelay(3); |
| +} |
| + |
| +static void rcar_gyroadc_hw_stop(struct rcar_gyroadc *priv) |
| +{ |
| + /* Stop the GyroADC. */ |
| + writel(0, priv->regs + RCAR_GYROADC_START_STOP); |
| +} |
| + |
| +#define RCAR_GYROADC_CHAN(_idx) { \ |
| + .type = IIO_VOLTAGE, \ |
| + .indexed = 1, \ |
| + .channel = (_idx), \ |
| + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ |
| + BIT(IIO_CHAN_INFO_SCALE), \ |
| + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ |
| +} |
| + |
| +static const struct iio_chan_spec rcar_gyroadc_iio_channels_1[] = { |
| + RCAR_GYROADC_CHAN(0), |
| + RCAR_GYROADC_CHAN(1), |
| + RCAR_GYROADC_CHAN(2), |
| + RCAR_GYROADC_CHAN(3), |
| +}; |
| + |
| +static const struct iio_chan_spec rcar_gyroadc_iio_channels_2[] = { |
| + RCAR_GYROADC_CHAN(0), |
| + RCAR_GYROADC_CHAN(1), |
| + RCAR_GYROADC_CHAN(2), |
| + RCAR_GYROADC_CHAN(3), |
| + RCAR_GYROADC_CHAN(4), |
| + RCAR_GYROADC_CHAN(5), |
| + RCAR_GYROADC_CHAN(6), |
| + RCAR_GYROADC_CHAN(7), |
| +}; |
| + |
| +static const struct iio_chan_spec rcar_gyroadc_iio_channels_3[] = { |
| + RCAR_GYROADC_CHAN(0), |
| + RCAR_GYROADC_CHAN(1), |
| + RCAR_GYROADC_CHAN(2), |
| + RCAR_GYROADC_CHAN(3), |
| + RCAR_GYROADC_CHAN(4), |
| + RCAR_GYROADC_CHAN(5), |
| + RCAR_GYROADC_CHAN(6), |
| + RCAR_GYROADC_CHAN(7), |
| +}; |
| + |
| +static int rcar_gyroadc_set_power(struct rcar_gyroadc *priv, bool on) |
| +{ |
| + struct device *dev = priv->dev; |
| + int ret; |
| + |
| + if (on) { |
| + ret = pm_runtime_get_sync(dev); |
| + if (ret < 0) |
| + pm_runtime_put_noidle(dev); |
| + } else { |
| + pm_runtime_mark_last_busy(dev); |
| + ret = pm_runtime_put_autosuspend(dev); |
| + } |
| + |
| + return ret; |
| +} |
| + |
| +static int rcar_gyroadc_read_raw(struct iio_dev *indio_dev, |
| + struct iio_chan_spec const *chan, |
| + int *val, int *val2, long mask) |
| +{ |
| + struct rcar_gyroadc *priv = iio_priv(indio_dev); |
| + struct regulator *consumer; |
| + unsigned int datareg = RCAR_GYROADC_REALTIME_DATA(chan->channel); |
| + unsigned int vref; |
| + int ret; |
| + |
| + /* |
| + * MB88101 is special in that it has only single regulator for |
| + * all four channels. |
| + */ |
| + if (priv->mode == RCAR_GYROADC_MODE_SELECT_1_MB88101A) |
| + consumer = priv->vref[0]; |
| + else |
| + consumer = priv->vref[chan->channel]; |
| + |
| + switch (mask) { |
| + case IIO_CHAN_INFO_RAW: |
| + if (chan->type != IIO_VOLTAGE) |
| + return -EINVAL; |
| + |
| + /* Channel not connected. */ |
| + if (!consumer) |
| + return -EINVAL; |
| + |
| + ret = iio_device_claim_direct_mode(indio_dev); |
| + if (ret) |
| + return ret; |
| + |
| + ret = rcar_gyroadc_set_power(priv, true); |
| + if (ret < 0) { |
| + iio_device_release_direct_mode(indio_dev); |
| + return ret; |
| + } |
| + |
| + *val = readl(priv->regs + datareg); |
| + *val &= BIT(priv->sample_width) - 1; |
| + |
| + ret = rcar_gyroadc_set_power(priv, false); |
| + iio_device_release_direct_mode(indio_dev); |
| + if (ret < 0) |
| + return ret; |
| + |
| + return IIO_VAL_INT; |
| + case IIO_CHAN_INFO_SCALE: |
| + /* Channel not connected. */ |
| + if (!consumer) |
| + return -EINVAL; |
| + |
| + vref = regulator_get_voltage(consumer); |
| + *val = vref / 1000; |
| + *val2 = 1 << priv->sample_width; |
| + |
| + return IIO_VAL_FRACTIONAL; |
| + case IIO_CHAN_INFO_SAMP_FREQ: |
| + *val = RCAR_GYROADC_SAMPLE_RATE; |
| + |
| + return IIO_VAL_INT; |
| + default: |
| + return -EINVAL; |
| + } |
| +} |
| + |
| +static int rcar_gyroadc_reg_access(struct iio_dev *indio_dev, |
| + unsigned int reg, unsigned int writeval, |
| + unsigned int *readval) |
| +{ |
| + struct rcar_gyroadc *priv = iio_priv(indio_dev); |
| + unsigned int maxreg = RCAR_GYROADC_FIFO_STATUS; |
| + |
| + if (readval == NULL) |
| + return -EINVAL; |
| + |
| + if (reg % 4) |
| + return -EINVAL; |
| + |
| + /* Handle the V2H case with extra interrupt block. */ |
| + if (priv->model == RCAR_GYROADC_MODEL_R8A7792) |
| + maxreg = RCAR_GYROADC_INTENR; |
| + |
| + if (reg > maxreg) |
| + return -EINVAL; |
| + |
| + *readval = readl(priv->regs + reg); |
| + |
| + return 0; |
| +} |
| + |
| +static const struct iio_info rcar_gyroadc_iio_info = { |
| + .driver_module = THIS_MODULE, |
| + .read_raw = rcar_gyroadc_read_raw, |
| + .debugfs_reg_access = rcar_gyroadc_reg_access, |
| +}; |
| + |
| +static const struct of_device_id rcar_gyroadc_match[] = { |
| + { |
| + /* R-Car compatible GyroADC */ |
| + .compatible = "renesas,rcar-gyroadc", |
| + .data = (void *)RCAR_GYROADC_MODEL_DEFAULT, |
| + }, { |
| + /* R-Car V2H specialty with interrupt registers. */ |
| + .compatible = "renesas,r8a7792-gyroadc", |
| + .data = (void *)RCAR_GYROADC_MODEL_R8A7792, |
| + }, { |
| + /* sentinel */ |
| + } |
| +}; |
| + |
| +MODULE_DEVICE_TABLE(of, rcar_gyroadc_match); |
| + |
| +static const struct of_device_id rcar_gyroadc_child_match[] = { |
| + /* Mode 1 ADCs */ |
| + { |
| + .compatible = "fujitsu,mb88101a", |
| + .data = (void *)RCAR_GYROADC_MODE_SELECT_1_MB88101A, |
| + }, |
| + /* Mode 2 ADCs */ |
| + { |
| + .compatible = "ti,adcs7476", |
| + .data = (void *)RCAR_GYROADC_MODE_SELECT_2_ADCS7476, |
| + }, { |
| + .compatible = "ti,adc121", |
| + .data = (void *)RCAR_GYROADC_MODE_SELECT_2_ADCS7476, |
| + }, { |
| + .compatible = "adi,ad7476", |
| + .data = (void *)RCAR_GYROADC_MODE_SELECT_2_ADCS7476, |
| + }, |
| + /* Mode 3 ADCs */ |
| + { |
| + .compatible = "maxim,max1162", |
| + .data = (void *)RCAR_GYROADC_MODE_SELECT_3_MAX1162, |
| + }, { |
| + .compatible = "maxim,max11100", |
| + .data = (void *)RCAR_GYROADC_MODE_SELECT_3_MAX1162, |
| + }, |
| + { /* sentinel */ } |
| +}; |
| + |
| +static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev) |
| +{ |
| + const struct of_device_id *of_id; |
| + const struct iio_chan_spec *channels; |
| + struct rcar_gyroadc *priv = iio_priv(indio_dev); |
| + struct device *dev = priv->dev; |
| + struct device_node *np = dev->of_node; |
| + struct device_node *child; |
| + struct regulator *vref; |
| + unsigned int reg; |
| + unsigned int adcmode, childmode; |
| + unsigned int sample_width; |
| + unsigned int num_channels; |
| + int ret, first = 1; |
| + |
| + for_each_child_of_node(np, child) { |
| + of_id = of_match_node(rcar_gyroadc_child_match, child); |
| + if (!of_id) { |
| + dev_err(dev, "Ignoring unsupported ADC \"%s\".", |
| + child->name); |
| + continue; |
| + } |
| + |
| + childmode = (unsigned int)of_id->data; |
| + switch (childmode) { |
| + case RCAR_GYROADC_MODE_SELECT_1_MB88101A: |
| + sample_width = 12; |
| + channels = rcar_gyroadc_iio_channels_1; |
| + num_channels = ARRAY_SIZE(rcar_gyroadc_iio_channels_1); |
| + break; |
| + case RCAR_GYROADC_MODE_SELECT_2_ADCS7476: |
| + sample_width = 15; |
| + channels = rcar_gyroadc_iio_channels_2; |
| + num_channels = ARRAY_SIZE(rcar_gyroadc_iio_channels_2); |
| + break; |
| + case RCAR_GYROADC_MODE_SELECT_3_MAX1162: |
| + sample_width = 16; |
| + channels = rcar_gyroadc_iio_channels_3; |
| + num_channels = ARRAY_SIZE(rcar_gyroadc_iio_channels_3); |
| + break; |
| + } |
| + |
| + /* |
| + * MB88101 is special in that it's only a single chip taking |
| + * up all the CHS lines. Thus, the DT binding is also special |
| + * and has no reg property. If we run into such ADC, handle |
| + * it here. |
| + */ |
| + if (childmode == RCAR_GYROADC_MODE_SELECT_1_MB88101A) { |
| + reg = 0; |
| + } else { |
| + ret = of_property_read_u32(child, "reg", ®); |
| + if (ret) { |
| + dev_err(dev, |
| + "Failed to get child reg property of ADC \"%s\".\n", |
| + child->name); |
| + return ret; |
| + } |
| + |
| + /* Channel number is too high. */ |
| + if (reg >= num_channels) { |
| + dev_err(dev, |
| + "Only %i channels supported with %s, but reg = <%i>.\n", |
| + num_channels, child->name, reg); |
| + return ret; |
| + } |
| + } |
| + |
| + /* Child node selected different mode than the rest. */ |
| + if (!first && (adcmode != childmode)) { |
| + dev_err(dev, |
| + "Channel %i uses different ADC mode than the rest.\n", |
| + reg); |
| + return ret; |
| + } |
| + |
| + /* Channel is valid, grab the regulator. */ |
| + dev->of_node = child; |
| + vref = devm_regulator_get(dev, "vref"); |
| + dev->of_node = np; |
| + if (IS_ERR(vref)) { |
| + dev_dbg(dev, "Channel %i 'vref' supply not connected.\n", |
| + reg); |
| + return PTR_ERR(vref); |
| + } |
| + |
| + priv->vref[reg] = vref; |
| + |
| + if (!first) |
| + continue; |
| + |
| + /* First child node which passed sanity tests. */ |
| + adcmode = childmode; |
| + first = 0; |
| + |
| + priv->num_channels = num_channels; |
| + priv->mode = childmode; |
| + priv->sample_width = sample_width; |
| + |
| + indio_dev->channels = channels; |
| + indio_dev->num_channels = num_channels; |
| + |
| + /* |
| + * MB88101 is special and we only have one such device |
| + * attached to the GyroADC at a time, so if we found it, |
| + * we can stop parsing here. |
| + */ |
| + if (childmode == RCAR_GYROADC_MODE_SELECT_1_MB88101A) |
| + break; |
| + } |
| + |
| + if (first) { |
| + dev_err(dev, "No valid ADC channels found, aborting.\n"); |
| + return -EINVAL; |
| + } |
| + |
| + return 0; |
| +} |
| + |
| +static void rcar_gyroadc_deinit_supplies(struct iio_dev *indio_dev) |
| +{ |
| + struct rcar_gyroadc *priv = iio_priv(indio_dev); |
| + unsigned int i; |
| + |
| + for (i = 0; i < priv->num_channels; i++) { |
| + if (!priv->vref[i]) |
| + continue; |
| + |
| + regulator_disable(priv->vref[i]); |
| + } |
| +} |
| + |
| +static int rcar_gyroadc_init_supplies(struct iio_dev *indio_dev) |
| +{ |
| + struct rcar_gyroadc *priv = iio_priv(indio_dev); |
| + struct device *dev = priv->dev; |
| + unsigned int i; |
| + int ret; |
| + |
| + for (i = 0; i < priv->num_channels; i++) { |
| + if (!priv->vref[i]) |
| + continue; |
| + |
| + ret = regulator_enable(priv->vref[i]); |
| + if (ret) { |
| + dev_err(dev, "Failed to enable regulator %i (ret=%i)\n", |
| + i, ret); |
| + goto err; |
| + } |
| + } |
| + |
| + return 0; |
| + |
| +err: |
| + rcar_gyroadc_deinit_supplies(indio_dev); |
| + return ret; |
| +} |
| + |
| +static int rcar_gyroadc_probe(struct platform_device *pdev) |
| +{ |
| + const struct of_device_id *of_id = |
| + of_match_device(rcar_gyroadc_match, &pdev->dev); |
| + struct device *dev = &pdev->dev; |
| + struct rcar_gyroadc *priv; |
| + struct iio_dev *indio_dev; |
| + struct resource *mem; |
| + int ret; |
| + |
| + indio_dev = devm_iio_device_alloc(dev, sizeof(*priv)); |
| + if (!indio_dev) { |
| + dev_err(dev, "Failed to allocate IIO device.\n"); |
| + return -ENOMEM; |
| + } |
| + |
| + priv = iio_priv(indio_dev); |
| + priv->dev = dev; |
| + |
| + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| + priv->regs = devm_ioremap_resource(dev, mem); |
| + if (IS_ERR(priv->regs)) |
| + return PTR_ERR(priv->regs); |
| + |
| + priv->iclk = devm_clk_get(dev, "if"); |
| + if (IS_ERR(priv->iclk)) { |
| + ret = PTR_ERR(priv->iclk); |
| + if (ret != -EPROBE_DEFER) |
| + dev_err(dev, "Failed to get IF clock (ret=%i)\n", ret); |
| + return ret; |
| + } |
| + |
| + ret = rcar_gyroadc_parse_subdevs(indio_dev); |
| + if (ret) |
| + return ret; |
| + |
| + ret = rcar_gyroadc_init_supplies(indio_dev); |
| + if (ret) |
| + return ret; |
| + |
| + priv->model = (enum rcar_gyroadc_model)of_id->data; |
| + |
| + platform_set_drvdata(pdev, indio_dev); |
| + |
| + indio_dev->name = DRIVER_NAME; |
| + indio_dev->dev.parent = dev; |
| + indio_dev->dev.of_node = pdev->dev.of_node; |
| + indio_dev->info = &rcar_gyroadc_iio_info; |
| + indio_dev->modes = INDIO_DIRECT_MODE; |
| + |
| + ret = clk_prepare_enable(priv->iclk); |
| + if (ret) { |
| + dev_err(dev, "Could not prepare or enable the IF clock.\n"); |
| + goto err_clk_if_enable; |
| + } |
| + |
| + pm_runtime_set_autosuspend_delay(dev, RCAR_GYROADC_RUNTIME_PM_DELAY_MS); |
| + pm_runtime_use_autosuspend(dev); |
| + pm_runtime_enable(dev); |
| + |
| + pm_runtime_get_sync(dev); |
| + rcar_gyroadc_hw_init(priv); |
| + rcar_gyroadc_hw_start(priv); |
| + |
| + ret = iio_device_register(indio_dev); |
| + if (ret) { |
| + dev_err(dev, "Couldn't register IIO device.\n"); |
| + goto err_iio_device_register; |
| + } |
| + |
| + pm_runtime_put_sync(dev); |
| + |
| + return 0; |
| + |
| +err_iio_device_register: |
| + rcar_gyroadc_hw_stop(priv); |
| + pm_runtime_put_sync(dev); |
| + pm_runtime_disable(dev); |
| + pm_runtime_set_suspended(dev); |
| + clk_disable_unprepare(priv->iclk); |
| +err_clk_if_enable: |
| + rcar_gyroadc_deinit_supplies(indio_dev); |
| + |
| + return ret; |
| +} |
| + |
| +static int rcar_gyroadc_remove(struct platform_device *pdev) |
| +{ |
| + struct iio_dev *indio_dev = platform_get_drvdata(pdev); |
| + struct rcar_gyroadc *priv = iio_priv(indio_dev); |
| + struct device *dev = priv->dev; |
| + |
| + iio_device_unregister(indio_dev); |
| + pm_runtime_get_sync(dev); |
| + rcar_gyroadc_hw_stop(priv); |
| + pm_runtime_put_sync(dev); |
| + pm_runtime_disable(dev); |
| + pm_runtime_set_suspended(dev); |
| + clk_disable_unprepare(priv->iclk); |
| + rcar_gyroadc_deinit_supplies(indio_dev); |
| + |
| + return 0; |
| +} |
| + |
| +#if defined(CONFIG_PM) |
| +static int rcar_gyroadc_suspend(struct device *dev) |
| +{ |
| + struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| + struct rcar_gyroadc *priv = iio_priv(indio_dev); |
| + |
| + rcar_gyroadc_hw_stop(priv); |
| + |
| + return 0; |
| +} |
| + |
| +static int rcar_gyroadc_resume(struct device *dev) |
| +{ |
| + struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| + struct rcar_gyroadc *priv = iio_priv(indio_dev); |
| + |
| + rcar_gyroadc_hw_start(priv); |
| + |
| + return 0; |
| +} |
| +#endif |
| + |
| +static const struct dev_pm_ops rcar_gyroadc_pm_ops = { |
| + SET_RUNTIME_PM_OPS(rcar_gyroadc_suspend, rcar_gyroadc_resume, NULL) |
| +}; |
| + |
| +static struct platform_driver rcar_gyroadc_driver = { |
| + .probe = rcar_gyroadc_probe, |
| + .remove = rcar_gyroadc_remove, |
| + .driver = { |
| + .name = DRIVER_NAME, |
| + .of_match_table = rcar_gyroadc_match, |
| + .pm = &rcar_gyroadc_pm_ops, |
| + }, |
| +}; |
| + |
| +module_platform_driver(rcar_gyroadc_driver); |
| + |
| +MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); |
| +MODULE_DESCRIPTION("Renesas R-Car GyroADC driver"); |
| +MODULE_LICENSE("GPL"); |