[PATCH v2 3/9] iio: adc: rzt2h: store the physical address in private state
From: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
Date: 2026-09-10 08:55:58
Also in:
linux-iio, linux-renesas-soc, lkml
Subsystem:
iio subsystem and drivers, renesas rz/t2h / rz/n2h a/d driver, the rest · Maintainers:
Jonathan Cameron, Cosmin Tanislav, Linus Torvalds
To prepare for adding support for DMA-based transfers, store the physical address of the device in struct rzt2h_adc::phys_base. Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com> --- V2: * no changes drivers/iio/adc/rzt2h_adc.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/adc/rzt2h_adc.c b/drivers/iio/adc/rzt2h_adc.c
index 470b16b5b9c8..995308a419f1 100644
--- a/drivers/iio/adc/rzt2h_adc.c
+++ b/drivers/iio/adc/rzt2h_adc.c@@ -36,6 +36,7 @@ struct rzt2h_adc { void __iomem *base; struct device *dev; + phys_addr_t phys_base; struct completion completion; /* lock to protect against multiple access to the device */ struct mutex lock;
@@ -211,6 +212,7 @@ static int rzt2h_adc_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct iio_dev *indio_dev; struct rzt2h_adc *adc; + struct resource *res; int ret; indio_dev = devm_iio_device_alloc(dev, sizeof(*adc));
@@ -231,10 +233,12 @@ static int rzt2h_adc_probe(struct platform_device *pdev) if (ret) return ret; - adc->base = devm_platform_ioremap_resource(pdev, 0); + adc->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); if (IS_ERR(adc->base)) return PTR_ERR(adc->base); + adc->phys_base = res->start; + pm_runtime_set_autosuspend_delay(dev, 300); pm_runtime_use_autosuspend(dev); ret = devm_pm_runtime_enable(dev);
--
2.55.0