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286 lines
7.7 KiB
286 lines
7.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Pistachio internal dac driver |
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* |
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* Copyright (C) 2015 Imagination Technologies Ltd. |
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* |
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* Author: Damien Horsley <[email protected]> |
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*/ |
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#include <linux/clk.h> |
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#include <linux/delay.h> |
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#include <linux/mfd/syscon.h> |
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#include <linux/module.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/regmap.h> |
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#include <linux/regulator/consumer.h> |
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#include <sound/pcm_params.h> |
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#include <sound/soc.h> |
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#define PISTACHIO_INTERNAL_DAC_CTRL 0x40 |
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#define PISTACHIO_INTERNAL_DAC_CTRL_PWR_SEL_MASK 0x2 |
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#define PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK 0x1 |
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#define PISTACHIO_INTERNAL_DAC_SRST 0x44 |
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#define PISTACHIO_INTERNAL_DAC_SRST_MASK 0x1 |
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#define PISTACHIO_INTERNAL_DAC_GTI_CTRL 0x48 |
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#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_SHIFT 0 |
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#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_MASK 0xFFF |
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#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK 0x1000 |
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#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_SHIFT 13 |
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#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_MASK 0x1FE000 |
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#define PISTACHIO_INTERNAL_DAC_PWR 0x1 |
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#define PISTACHIO_INTERNAL_DAC_PWR_MASK 0x1 |
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#define PISTACHIO_INTERNAL_DAC_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | \ |
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SNDRV_PCM_FMTBIT_S32_LE) |
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/* codec private data */ |
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struct pistachio_internal_dac { |
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struct regmap *regmap; |
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struct regulator *supply; |
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bool mute; |
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}; |
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static const struct snd_kcontrol_new pistachio_internal_dac_snd_controls[] = { |
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SOC_SINGLE("Playback Switch", PISTACHIO_INTERNAL_DAC_CTRL, 2, 1, 1) |
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}; |
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static const struct snd_soc_dapm_widget pistachio_internal_dac_widgets[] = { |
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SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), |
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SND_SOC_DAPM_OUTPUT("AOUTL"), |
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SND_SOC_DAPM_OUTPUT("AOUTR"), |
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}; |
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static const struct snd_soc_dapm_route pistachio_internal_dac_routes[] = { |
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{ "AOUTL", NULL, "DAC" }, |
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{ "AOUTR", NULL, "DAC" }, |
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}; |
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static void pistachio_internal_dac_reg_writel(struct regmap *top_regs, |
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u32 val, u32 reg) |
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{ |
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regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL, |
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PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_MASK, |
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reg << PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_SHIFT); |
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regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL, |
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PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_MASK, |
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val << PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_SHIFT); |
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regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL, |
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PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK, |
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PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK); |
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regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL, |
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PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK, 0); |
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} |
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static void pistachio_internal_dac_pwr_off(struct pistachio_internal_dac *dac) |
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{ |
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regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_CTRL, |
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PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK, |
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PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK); |
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pistachio_internal_dac_reg_writel(dac->regmap, 0, |
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PISTACHIO_INTERNAL_DAC_PWR); |
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} |
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static void pistachio_internal_dac_pwr_on(struct pistachio_internal_dac *dac) |
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{ |
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regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_SRST, |
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PISTACHIO_INTERNAL_DAC_SRST_MASK, |
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PISTACHIO_INTERNAL_DAC_SRST_MASK); |
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regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_SRST, |
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PISTACHIO_INTERNAL_DAC_SRST_MASK, 0); |
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pistachio_internal_dac_reg_writel(dac->regmap, |
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PISTACHIO_INTERNAL_DAC_PWR_MASK, |
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PISTACHIO_INTERNAL_DAC_PWR); |
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regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_CTRL, |
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PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK, 0); |
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} |
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static struct snd_soc_dai_driver pistachio_internal_dac_dais[] = { |
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{ |
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.name = "pistachio_internal_dac", |
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.playback = { |
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.stream_name = "Playback", |
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.channels_min = 2, |
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.channels_max = 2, |
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.rates = SNDRV_PCM_RATE_8000_48000, |
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.formats = PISTACHIO_INTERNAL_DAC_FORMATS, |
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} |
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}, |
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}; |
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static int pistachio_internal_dac_codec_probe(struct snd_soc_component *component) |
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{ |
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struct pistachio_internal_dac *dac = snd_soc_component_get_drvdata(component); |
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snd_soc_component_init_regmap(component, dac->regmap); |
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return 0; |
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} |
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static const struct snd_soc_component_driver pistachio_internal_dac_driver = { |
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.probe = pistachio_internal_dac_codec_probe, |
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.controls = pistachio_internal_dac_snd_controls, |
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.num_controls = ARRAY_SIZE(pistachio_internal_dac_snd_controls), |
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.dapm_widgets = pistachio_internal_dac_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(pistachio_internal_dac_widgets), |
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.dapm_routes = pistachio_internal_dac_routes, |
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.num_dapm_routes = ARRAY_SIZE(pistachio_internal_dac_routes), |
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.use_pmdown_time = 1, |
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.endianness = 1, |
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.non_legacy_dai_naming = 1, |
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}; |
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static int pistachio_internal_dac_probe(struct platform_device *pdev) |
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{ |
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struct pistachio_internal_dac *dac; |
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int ret, voltage; |
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struct device *dev = &pdev->dev; |
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u32 reg; |
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dac = devm_kzalloc(dev, sizeof(*dac), GFP_KERNEL); |
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if (!dac) |
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return -ENOMEM; |
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platform_set_drvdata(pdev, dac); |
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dac->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, |
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"img,cr-top"); |
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if (IS_ERR(dac->regmap)) |
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return PTR_ERR(dac->regmap); |
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dac->supply = devm_regulator_get(dev, "VDD"); |
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if (IS_ERR(dac->supply)) { |
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ret = PTR_ERR(dac->supply); |
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if (ret != -EPROBE_DEFER) |
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dev_err(dev, "failed to acquire supply 'VDD-supply': %d\n", ret); |
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return ret; |
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} |
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ret = regulator_enable(dac->supply); |
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if (ret) { |
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dev_err(dev, "failed to enable supply: %d\n", ret); |
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return ret; |
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} |
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voltage = regulator_get_voltage(dac->supply); |
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switch (voltage) { |
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case 1800000: |
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reg = 0; |
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break; |
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case 3300000: |
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reg = PISTACHIO_INTERNAL_DAC_CTRL_PWR_SEL_MASK; |
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break; |
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default: |
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dev_err(dev, "invalid voltage: %d\n", voltage); |
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ret = -EINVAL; |
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goto err_regulator; |
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} |
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regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_CTRL, |
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PISTACHIO_INTERNAL_DAC_CTRL_PWR_SEL_MASK, reg); |
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pistachio_internal_dac_pwr_off(dac); |
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pistachio_internal_dac_pwr_on(dac); |
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pm_runtime_set_active(dev); |
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pm_runtime_enable(dev); |
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pm_runtime_idle(dev); |
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ret = devm_snd_soc_register_component(dev, |
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&pistachio_internal_dac_driver, |
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pistachio_internal_dac_dais, |
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ARRAY_SIZE(pistachio_internal_dac_dais)); |
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if (ret) { |
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dev_err(dev, "failed to register component: %d\n", ret); |
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goto err_pwr; |
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} |
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return 0; |
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err_pwr: |
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pm_runtime_disable(&pdev->dev); |
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pistachio_internal_dac_pwr_off(dac); |
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err_regulator: |
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regulator_disable(dac->supply); |
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return ret; |
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} |
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static int pistachio_internal_dac_remove(struct platform_device *pdev) |
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{ |
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struct pistachio_internal_dac *dac = dev_get_drvdata(&pdev->dev); |
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pm_runtime_disable(&pdev->dev); |
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pistachio_internal_dac_pwr_off(dac); |
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regulator_disable(dac->supply); |
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return 0; |
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} |
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#ifdef CONFIG_PM |
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static int pistachio_internal_dac_rt_resume(struct device *dev) |
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{ |
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struct pistachio_internal_dac *dac = dev_get_drvdata(dev); |
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int ret; |
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ret = regulator_enable(dac->supply); |
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if (ret) { |
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dev_err(dev, "failed to enable supply: %d\n", ret); |
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return ret; |
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} |
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pistachio_internal_dac_pwr_on(dac); |
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return 0; |
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} |
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static int pistachio_internal_dac_rt_suspend(struct device *dev) |
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{ |
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struct pistachio_internal_dac *dac = dev_get_drvdata(dev); |
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pistachio_internal_dac_pwr_off(dac); |
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regulator_disable(dac->supply); |
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return 0; |
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} |
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#endif |
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static const struct dev_pm_ops pistachio_internal_dac_pm_ops = { |
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SET_RUNTIME_PM_OPS(pistachio_internal_dac_rt_suspend, |
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pistachio_internal_dac_rt_resume, NULL) |
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}; |
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static const struct of_device_id pistachio_internal_dac_of_match[] = { |
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{ .compatible = "img,pistachio-internal-dac" }, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(of, pistachio_internal_dac_of_match); |
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static struct platform_driver pistachio_internal_dac_plat_driver = { |
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.driver = { |
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.name = "img-pistachio-internal-dac", |
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.of_match_table = pistachio_internal_dac_of_match, |
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.pm = &pistachio_internal_dac_pm_ops |
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}, |
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.probe = pistachio_internal_dac_probe, |
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.remove = pistachio_internal_dac_remove |
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}; |
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module_platform_driver(pistachio_internal_dac_plat_driver); |
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MODULE_DESCRIPTION("Pistachio Internal DAC driver"); |
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MODULE_AUTHOR("Damien Horsley <[email protected]>"); |
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MODULE_LICENSE("GPL v2");
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