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iio: stm32-adc: remove usage of iio_priv_to_dev() helper

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We may want to get rid of the iio_priv_to_dev() helper. The reason is that
we will hide some of the members of the iio_dev structure (to prevent
drivers from accessing them directly), and that will also mean hiding the
implementation of the iio_priv_to_dev() helper inside the IIO core.

Hiding the implementation of iio_priv_to_dev() implies that some fast-paths
may not be fast anymore, so a general idea is to try to get rid of the
iio_priv_to_dev() altogether.
The iio_priv() helper won't be affected by the rework, as the iio_dev
struct will keep a reference to the private information.

For this driver, not using iio_priv_to_dev(), means reworking some paths to
pass the iio device and using iio_priv() to access the private information.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Acked-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Alexandru Ardelean 2020-05-26 16:44:48 +03:00 committed by Jonathan Cameron
parent 723151a240
commit cd64d3579d
1 changed files with 63 additions and 55 deletions
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118
drivers/iio/adc/stm32-adc.c
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@ -162,10 +162,10 @@ struct stm32_adc_cfg {
struct stm32_adc_trig_info *trigs;
bool clk_required;
bool has_vregready;
int (*prepare)(struct stm32_adc *);
void (*start_conv)(struct stm32_adc *, bool dma);
void (*stop_conv)(struct stm32_adc *);
void (*unprepare)(struct stm32_adc *);
int (*prepare)(struct iio_dev *);
void (*start_conv)(struct iio_dev *, bool dma);
void (*stop_conv)(struct iio_dev *);
void (*unprepare)(struct iio_dev *);
const unsigned int *smp_cycles;
};
@ -538,10 +538,11 @@ static void stm32_adc_set_res(struct stm32_adc *adc)
static int stm32_adc_hw_stop(struct device *dev)
{
struct stm32_adc *adc = dev_get_drvdata(dev);
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct stm32_adc *adc = iio_priv(indio_dev);
if (adc->cfg->unprepare)
adc->cfg->unprepare(adc);
adc->cfg->unprepare(indio_dev);
if (adc->clk)
clk_disable_unprepare(adc->clk);
@ -551,7 +552,8 @@ static int stm32_adc_hw_stop(struct device *dev)
static int stm32_adc_hw_start(struct device *dev)
{
struct stm32_adc *adc = dev_get_drvdata(dev);
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct stm32_adc *adc = iio_priv(indio_dev);
int ret;
if (adc->clk) {
@ -563,7 +565,7 @@ static int stm32_adc_hw_start(struct device *dev)
stm32_adc_set_res(adc);
if (adc->cfg->prepare) {
ret = adc->cfg->prepare(adc);
ret = adc->cfg->prepare(indio_dev);
if (ret)
goto err_clk_dis;
}
@ -579,7 +581,7 @@ err_clk_dis:
/**
* stm32f4_adc_start_conv() - Start conversions for regular channels.
* @adc: stm32 adc instance
* @indio_dev: IIO device instance
* @dma: use dma to transfer conversion result
*
* Start conversions for regular channels.
@ -587,8 +589,10 @@ err_clk_dis:
* conversions, in IIO buffer modes. Otherwise, use ADC interrupt with direct
* DR read instead (e.g. read_raw, or triggered buffer mode without DMA).
*/
static void stm32f4_adc_start_conv(struct stm32_adc *adc, bool dma)
static void stm32f4_adc_start_conv(struct iio_dev *indio_dev, bool dma)
{
struct stm32_adc *adc = iio_priv(indio_dev);
stm32_adc_set_bits(adc, STM32F4_ADC_CR1, STM32F4_SCAN);
if (dma)
@ -605,8 +609,10 @@ static void stm32f4_adc_start_conv(struct stm32_adc *adc, bool dma)
stm32_adc_set_bits(adc, STM32F4_ADC_CR2, STM32F4_SWSTART);
}
static void stm32f4_adc_stop_conv(struct stm32_adc *adc)
static void stm32f4_adc_stop_conv(struct iio_dev *indio_dev)
{
struct stm32_adc *adc = iio_priv(indio_dev);
stm32_adc_clr_bits(adc, STM32F4_ADC_CR2, STM32F4_EXTEN_MASK);
stm32_adc_clr_bits(adc, STM32F4_ADC_SR, STM32F4_STRT);
@ -615,8 +621,9 @@ static void stm32f4_adc_stop_conv(struct stm32_adc *adc)
STM32F4_ADON | STM32F4_DMA | STM32F4_DDS);
}
static void stm32h7_adc_start_conv(struct stm32_adc *adc, bool dma)
static void stm32h7_adc_start_conv(struct iio_dev *indio_dev, bool dma)
{
struct stm32_adc *adc = iio_priv(indio_dev);
enum stm32h7_adc_dmngt dmngt;
unsigned long flags;
u32 val;
@ -635,9 +642,9 @@ static void stm32h7_adc_start_conv(struct stm32_adc *adc, bool dma)
stm32_adc_set_bits(adc, STM32H7_ADC_CR, STM32H7_ADSTART);
}
static void stm32h7_adc_stop_conv(struct stm32_adc *adc)
static void stm32h7_adc_stop_conv(struct iio_dev *indio_dev)
{
struct iio_dev *indio_dev = iio_priv_to_dev(adc);
struct stm32_adc *adc = iio_priv(indio_dev);
int ret;
u32 val;
@ -652,9 +659,9 @@ static void stm32h7_adc_stop_conv(struct stm32_adc *adc)
stm32_adc_clr_bits(adc, STM32H7_ADC_CFGR, STM32H7_DMNGT_MASK);
}
static int stm32h7_adc_exit_pwr_down(struct stm32_adc *adc)
static int stm32h7_adc_exit_pwr_down(struct iio_dev *indio_dev)
{
struct iio_dev *indio_dev = iio_priv_to_dev(adc);
struct stm32_adc *adc = iio_priv(indio_dev);
int ret;
u32 val;
@ -690,9 +697,9 @@ static void stm32h7_adc_enter_pwr_down(struct stm32_adc *adc)
stm32_adc_set_bits(adc, STM32H7_ADC_CR, STM32H7_DEEPPWD);
}
static int stm32h7_adc_enable(struct stm32_adc *adc)
static int stm32h7_adc_enable(struct iio_dev *indio_dev)
{
struct iio_dev *indio_dev = iio_priv_to_dev(adc);
struct stm32_adc *adc = iio_priv(indio_dev);
int ret;
u32 val;
@ -713,9 +720,9 @@ static int stm32h7_adc_enable(struct stm32_adc *adc)
return ret;
}
static void stm32h7_adc_disable(struct stm32_adc *adc)
static void stm32h7_adc_disable(struct iio_dev *indio_dev)
{
struct iio_dev *indio_dev = iio_priv_to_dev(adc);
struct stm32_adc *adc = iio_priv(indio_dev);
int ret;
u32 val;
@ -730,12 +737,12 @@ static void stm32h7_adc_disable(struct stm32_adc *adc)
/**
* stm32h7_adc_read_selfcalib() - read calibration shadow regs, save result
* @adc: stm32 adc instance
* @indio_dev: IIO device instance
* Note: Must be called once ADC is enabled, so LINCALRDYW[1..6] are writable
*/
static int stm32h7_adc_read_selfcalib(struct stm32_adc *adc)
static int stm32h7_adc_read_selfcalib(struct iio_dev *indio_dev)
{
struct iio_dev *indio_dev = iio_priv_to_dev(adc);
struct stm32_adc *adc = iio_priv(indio_dev);
int i, ret;
u32 lincalrdyw_mask, val;
@ -774,12 +781,12 @@ static int stm32h7_adc_read_selfcalib(struct stm32_adc *adc)
/**
* stm32h7_adc_restore_selfcalib() - Restore saved self-calibration result
* @adc: stm32 adc instance
* @indio_dev: IIO device instance
* Note: ADC must be enabled, with no on-going conversions.
*/
static int stm32h7_adc_restore_selfcalib(struct stm32_adc *adc)
static int stm32h7_adc_restore_selfcalib(struct iio_dev *indio_dev)
{
struct iio_dev *indio_dev = iio_priv_to_dev(adc);
struct stm32_adc *adc = iio_priv(indio_dev);
int i, ret;
u32 lincalrdyw_mask, val;
@ -847,12 +854,12 @@ static int stm32h7_adc_restore_selfcalib(struct stm32_adc *adc)
/**
* stm32h7_adc_selfcalib() - Procedure to calibrate ADC
* @adc: stm32 adc instance
* @indio_dev: IIO device instance
* Note: Must be called once ADC is out of power down.
*/
static int stm32h7_adc_selfcalib(struct stm32_adc *adc)
static int stm32h7_adc_selfcalib(struct iio_dev *indio_dev)
{
struct iio_dev *indio_dev = iio_priv_to_dev(adc);
struct stm32_adc *adc = iio_priv(indio_dev);
int ret;
u32 val;
@ -903,7 +910,7 @@ out:
/**
* stm32h7_adc_prepare() - Leave power down mode to enable ADC.
* @adc: stm32 adc instance
* @indio_dev: IIO device instance
* Leave power down mode.
* Configure channels as single ended or differential before enabling ADC.
* Enable ADC.
@ -912,30 +919,31 @@ out:
* - Only one input is selected for single ended (e.g. 'vinp')
* - Two inputs are selected for differential channels (e.g. 'vinp' & 'vinn')
*/
static int stm32h7_adc_prepare(struct stm32_adc *adc)
static int stm32h7_adc_prepare(struct iio_dev *indio_dev)
{
struct stm32_adc *adc = iio_priv(indio_dev);
int calib, ret;
ret = stm32h7_adc_exit_pwr_down(adc);
ret = stm32h7_adc_exit_pwr_down(indio_dev);
if (ret)
return ret;
ret = stm32h7_adc_selfcalib(adc);
ret = stm32h7_adc_selfcalib(indio_dev);
if (ret < 0)
goto pwr_dwn;
calib = ret;
stm32_adc_writel(adc, STM32H7_ADC_DIFSEL, adc->difsel);
ret = stm32h7_adc_enable(adc);
ret = stm32h7_adc_enable(indio_dev);
if (ret)
goto pwr_dwn;
/* Either restore or read calibration result for future reference */
if (calib)
ret = stm32h7_adc_restore_selfcalib(adc);
ret = stm32h7_adc_restore_selfcalib(indio_dev);
else
ret = stm32h7_adc_read_selfcalib(adc);
ret = stm32h7_adc_read_selfcalib(indio_dev);
if (ret)
goto disable;
@ -944,16 +952,18 @@ static int stm32h7_adc_prepare(struct stm32_adc *adc)
return 0;
disable:
stm32h7_adc_disable(adc);
stm32h7_adc_disable(indio_dev);
pwr_dwn:
stm32h7_adc_enter_pwr_down(adc);
return ret;
}
static void stm32h7_adc_unprepare(struct stm32_adc *adc)
static void stm32h7_adc_unprepare(struct iio_dev *indio_dev)
{
stm32h7_adc_disable(adc);
struct stm32_adc *adc = iio_priv(indio_dev);
stm32h7_adc_disable(indio_dev);
stm32h7_adc_enter_pwr_down(adc);
}
@ -1160,7 +1170,7 @@ static int stm32_adc_single_conv(struct iio_dev *indio_dev,
stm32_adc_conv_irq_enable(adc);
adc->cfg->start_conv(adc, false);
adc->cfg->start_conv(indio_dev, false);
timeout = wait_for_completion_interruptible_timeout(
&adc->completion, STM32_ADC_TIMEOUT);
@ -1173,7 +1183,7 @@ static int stm32_adc_single_conv(struct iio_dev *indio_dev,
ret = IIO_VAL_INT;
}
adc->cfg->stop_conv(adc);
adc->cfg->stop_conv(indio_dev);
stm32_adc_conv_irq_disable(adc);
@ -1227,8 +1237,8 @@ static int stm32_adc_read_raw(struct iio_dev *indio_dev,
static irqreturn_t stm32_adc_threaded_isr(int irq, void *data)
{
struct stm32_adc *adc = data;
struct iio_dev *indio_dev = iio_priv_to_dev(adc);
struct iio_dev *indio_dev = data;
struct stm32_adc *adc = iio_priv(indio_dev);
const struct stm32_adc_regspec *regs = adc->cfg->regs;
u32 status = stm32_adc_readl(adc, regs->isr_eoc.reg);
@ -1240,8 +1250,8 @@ static irqreturn_t stm32_adc_threaded_isr(int irq, void *data)
static irqreturn_t stm32_adc_isr(int irq, void *data)
{
struct stm32_adc *adc = data;
struct iio_dev *indio_dev = iio_priv_to_dev(adc);
struct iio_dev *indio_dev = data;
struct stm32_adc *adc = iio_priv(indio_dev);
const struct stm32_adc_regspec *regs = adc->cfg->regs;
u32 status = stm32_adc_readl(adc, regs->isr_eoc.reg);
@ -1514,7 +1524,7 @@ static int __stm32_adc_buffer_postenable(struct iio_dev *indio_dev)
if (!adc->dma_chan)
stm32_adc_conv_irq_enable(adc);
adc->cfg->start_conv(adc, !!adc->dma_chan);
adc->cfg->start_conv(indio_dev, !!adc->dma_chan);
return 0;
@ -1547,7 +1557,7 @@ static void __stm32_adc_buffer_predisable(struct iio_dev *indio_dev)
struct stm32_adc *adc = iio_priv(indio_dev);
struct device *dev = indio_dev->dev.parent;
adc->cfg->stop_conv(adc);
adc->cfg->stop_conv(indio_dev);
if (!adc->dma_chan)
stm32_adc_conv_irq_disable(adc);
@ -1891,7 +1901,7 @@ static int stm32_adc_probe(struct platform_device *pdev)
indio_dev->info = &stm32_adc_iio_info;
indio_dev->modes = INDIO_DIRECT_MODE | INDIO_HARDWARE_TRIGGERED;
platform_set_drvdata(pdev, adc);
platform_set_drvdata(pdev, indio_dev);
ret = of_property_read_u32(pdev->dev.of_node, "reg", &adc->offset);
if (ret != 0) {
@ -1905,7 +1915,7 @@ static int stm32_adc_probe(struct platform_device *pdev)
ret = devm_request_threaded_irq(&pdev->dev, adc->irq, stm32_adc_isr,
stm32_adc_threaded_isr,
0, pdev->name, adc);
0, pdev->name, indio_dev);
if (ret) {
dev_err(&pdev->dev, "failed to request IRQ\n");
return ret;
@ -1989,8 +1999,8 @@ err_dma_disable:
static int stm32_adc_remove(struct platform_device *pdev)
{
struct stm32_adc *adc = platform_get_drvdata(pdev);
struct iio_dev *indio_dev = iio_priv_to_dev(adc);
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
struct stm32_adc *adc = iio_priv(indio_dev);
pm_runtime_get_sync(&pdev->dev);
iio_device_unregister(indio_dev);
@ -2012,8 +2022,7 @@ static int stm32_adc_remove(struct platform_device *pdev)
#if defined(CONFIG_PM_SLEEP)
static int stm32_adc_suspend(struct device *dev)
{
struct stm32_adc *adc = dev_get_drvdata(dev);
struct iio_dev *indio_dev = iio_priv_to_dev(adc);
struct iio_dev *indio_dev = dev_get_drvdata(dev);
if (iio_buffer_enabled(indio_dev))
__stm32_adc_buffer_predisable(indio_dev);
@ -2023,8 +2032,7 @@ static int stm32_adc_suspend(struct device *dev)
static int stm32_adc_resume(struct device *dev)
{
struct stm32_adc *adc = dev_get_drvdata(dev);
struct iio_dev *indio_dev = iio_priv_to_dev(adc);
struct iio_dev *indio_dev = dev_get_drvdata(dev);
int ret;
ret = pm_runtime_force_resume(dev);