This series adds support for general purpose ADC (GPADC) on new
Allwinner's SoCs, such as D1, T113s, T507 and R329. The implemented driver
provides basic functionality for getting ADC channels data.
Change History:
v7:
- Fixed typo in DT bindings property
v6:
- Fixed DT bindings regexp for channel properties
- Dropped checking the max number of channels from the drivers code
(This is redundant as we raly on DT bindings check)
v5:
- Fixed DT bindings properties for child nodes
v4:
- Fixed DT bindings warnings
- Used GENMASK to clear the irq register
- Minor formatting fixes
v3:
- Added DT bindings dual license, fixed property order and example formatting
- Added explanations comments for timeout and mutex
- Dropped unnecessary regmap and used readl/writel instead
- Added error message about getting channel number
- Renamed labels and variables to make them self-explanatory
v2:
- Added lastch flag to avoid addition work for already selected channel
- Added reset assertion on module remove
- Added dynamic channel allocation and dropped iio_chan_spec arrays
- Changed IIO_CHAN_INFO_SCALE type to FRACTIONAL_LOG2
- Dropped separate compatible strings and configs for T113s and R329
- Fixed includes
- Fixed Kconfig description
- Removed duplicate probe error messages
- Used FIELD_PREP for bit setup
v1:
- Initial version
Maksim Kiselev (3):
iio: adc: Add Allwinner D1/T113s/R329/T507 SoCs GPADC
dt-bindings: iio: adc: Add Allwinner D1/T113s/R329/T507 SoCs GPADC
riscv: dts: allwinner: d1: Add GPADC node
.../iio/adc/allwinner,sun20i-d1-gpadc.yaml | 91 ++++++
.../boot/dts/allwinner/sunxi-d1s-t113.dtsi | 10 +
drivers/iio/adc/Kconfig | 10 +
drivers/iio/adc/Makefile | 1 +
drivers/iio/adc/sun20i-gpadc-iio.c | 276 ++++++++++++++++++
5 files changed, 388 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml
create mode 100644 drivers/iio/adc/sun20i-gpadc-iio.c
--
2.39.2
This patch adds declaration of the general purpose ADC for D1
and T113s SoCs.
Signed-off-by: Maksim Kiselev <[email protected]>
---
arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi b/arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi
index 922e8e0e2c09..90c79041cfba 100644
--- a/arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi
+++ b/arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi
@@ -138,6 +138,16 @@ ccu: clock-controller@2001000 {
#reset-cells = <1>;
};
+ gpadc: adc@2009000 {
+ compatible = "allwinner,sun20i-d1-gpadc";
+ reg = <0x2009000 0x1000>;
+ clocks = <&ccu CLK_BUS_GPADC>;
+ resets = <&ccu RST_BUS_GPADC>;
+ interrupts = <SOC_PERIPHERAL_IRQ(57) IRQ_TYPE_LEVEL_HIGH>;
+ status = "disabled";
+ #io-channel-cells = <1>;
+ };
+
dmic: dmic@2031000 {
compatible = "allwinner,sun20i-d1-dmic",
"allwinner,sun50i-h6-dmic";
--
2.39.2
The General Purpose ADC (GPADC) can convert the external signal into
a certain proportion of digital value, to realize the measurement of
analog signal, which can be applied to power detection and key detection.
Theoretically, this ADC can support up to 16 channels. All SoCs below
contain this GPADC IP. The only difference between them is the number
of available channels:
T113 - 1 channel
D1 - 2 channels
R329 - 4 channels
T507 - 4 channels
Reviewed-by: Andy Shevchenko <[email protected]>
Signed-off-by: Maksim Kiselev <[email protected]>
---
drivers/iio/adc/Kconfig | 10 ++
drivers/iio/adc/Makefile | 1 +
drivers/iio/adc/sun20i-gpadc-iio.c | 276 +++++++++++++++++++++++++++++
3 files changed, 287 insertions(+)
create mode 100644 drivers/iio/adc/sun20i-gpadc-iio.c
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index eb2b09ef5d5b..deff7ae704ce 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -1123,6 +1123,16 @@ config SUN4I_GPADC
To compile this driver as a module, choose M here: the module will be
called sun4i-gpadc-iio.
+config SUN20I_GPADC
+ tristate "Support for the Allwinner SoCs GPADC"
+ depends on ARCH_SUNXI || COMPILE_TEST
+ help
+ Say yes here to build support for Allwinner (D1, T113, T507 and R329)
+ SoCs GPADC. This ADC provides up to 16 channels.
+
+ To compile this driver as a module, choose M here: the module will be
+ called sun20i-gpadc-iio.
+
config TI_ADC081C
tristate "Texas Instruments ADC081C/ADC101C/ADC121C family"
depends on I2C
diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
index e07e4a3e6237..fc4ef71d5f8f 100644
--- a/drivers/iio/adc/Makefile
+++ b/drivers/iio/adc/Makefile
@@ -95,6 +95,7 @@ obj-$(CONFIG_RZG2L_ADC) += rzg2l_adc.o
obj-$(CONFIG_SC27XX_ADC) += sc27xx_adc.o
obj-$(CONFIG_SPEAR_ADC) += spear_adc.o
obj-$(CONFIG_SUN4I_GPADC) += sun4i-gpadc-iio.o
+obj-$(CONFIG_SUN20I_GPADC) += sun20i-gpadc-iio.o
obj-$(CONFIG_STM32_ADC_CORE) += stm32-adc-core.o
obj-$(CONFIG_STM32_ADC) += stm32-adc.o
obj-$(CONFIG_STM32_DFSDM_CORE) += stm32-dfsdm-core.o
diff --git a/drivers/iio/adc/sun20i-gpadc-iio.c b/drivers/iio/adc/sun20i-gpadc-iio.c
new file mode 100644
index 000000000000..6a893d484cf7
--- /dev/null
+++ b/drivers/iio/adc/sun20i-gpadc-iio.c
@@ -0,0 +1,276 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * GPADC driver for sunxi platforms (D1, T113-S3 and R329)
+ * Copyright (c) 2023 Maksim Kiselev <[email protected]>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/reset.h>
+
+#include <linux/iio/iio.h>
+
+#define SUN20I_GPADC_DRIVER_NAME "sun20i-gpadc"
+
+/* Register map definition */
+#define SUN20I_GPADC_SR 0x00
+#define SUN20I_GPADC_CTRL 0x04
+#define SUN20I_GPADC_CS_EN 0x08
+#define SUN20I_GPADC_FIFO_INTC 0x0c
+#define SUN20I_GPADC_FIFO_INTS 0x10
+#define SUN20I_GPADC_FIFO_DATA 0X14
+#define SUN20I_GPADC_CB_DATA 0X18
+#define SUN20I_GPADC_DATAL_INTC 0x20
+#define SUN20I_GPADC_DATAH_INTC 0x24
+#define SUN20I_GPADC_DATA_INTC 0x28
+#define SUN20I_GPADC_DATAL_INTS 0x30
+#define SUN20I_GPADC_DATAH_INTS 0x34
+#define SUN20I_GPADC_DATA_INTS 0x38
+#define SUN20I_GPADC_CH_CMP_DATA(x) (0x40 + (x) * 4)
+#define SUN20I_GPADC_CH_DATA(x) (0x80 + (x) * 4)
+
+#define SUN20I_GPADC_CTRL_ADC_AUTOCALI_EN_MASK BIT(23)
+#define SUN20I_GPADC_CTRL_WORK_MODE_MASK GENMASK(19, 18)
+#define SUN20I_GPADC_CTRL_ADC_EN_MASK BIT(16)
+#define SUN20I_GPADC_CS_EN_ADC_CH(x) BIT(x)
+#define SUN20I_GPADC_DATA_INTC_CH_DATA_IRQ_EN(x) BIT(x)
+
+#define SUN20I_GPADC_WORK_MODE_SINGLE 0
+
+struct sun20i_gpadc_iio {
+ void __iomem *regs;
+ struct completion completion;
+ int last_channel;
+ /*
+ * Lock to protect the device state during a potential concurrent
+ * read access from userspace. Reading a raw value requires a sequence
+ * of register writes, then a wait for a completion callback,
+ * and finally a register read, during which userspace could issue
+ * another read request. This lock protects a read access from
+ * ocurring before another one has finished.
+ */
+ struct mutex lock;
+};
+
+static int sun20i_gpadc_adc_read(struct sun20i_gpadc_iio *info,
+ struct iio_chan_spec const *chan, int *val)
+{
+ u32 ctrl;
+ int ret = IIO_VAL_INT;
+
+ mutex_lock(&info->lock);
+
+ reinit_completion(&info->completion);
+
+ if (info->last_channel != chan->channel) {
+ info->last_channel = chan->channel;
+
+ /* enable the analog input channel */
+ writel(SUN20I_GPADC_CS_EN_ADC_CH(chan->channel),
+ info->regs + SUN20I_GPADC_CS_EN);
+
+ /* enable the data irq for input channel */
+ writel(SUN20I_GPADC_DATA_INTC_CH_DATA_IRQ_EN(chan->channel),
+ info->regs + SUN20I_GPADC_DATA_INTC);
+ }
+
+ /* enable the ADC function */
+ ctrl = readl(info->regs + SUN20I_GPADC_CTRL);
+ ctrl |= FIELD_PREP(SUN20I_GPADC_CTRL_ADC_EN_MASK, 1);
+ writel(ctrl, info->regs + SUN20I_GPADC_CTRL);
+
+ /*
+ * According to the datasheet maximum acquire time(TACQ) can be
+ * (65535+1)/24Mhz and conversion time(CONV_TIME) is always constant
+ * and equal to 14/24Mhz, so (TACQ+CONV_TIME) <= 2.73125ms.
+ * A 10ms delay should be enough to make sure an interrupt occurs in
+ * normal conditions. If it doesn't occur, then there is a timeout.
+ */
+ if (!wait_for_completion_timeout(&info->completion, msecs_to_jiffies(10))) {
+ ret = -ETIMEDOUT;
+ goto err_unlock;
+ }
+
+ /* read the ADC data */
+ *val = readl(info->regs + SUN20I_GPADC_CH_DATA(chan->channel));
+
+err_unlock:
+ mutex_unlock(&info->lock);
+
+ return ret;
+}
+
+static int sun20i_gpadc_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long mask)
+{
+ struct sun20i_gpadc_iio *info = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ return sun20i_gpadc_adc_read(info, chan, val);
+ case IIO_CHAN_INFO_SCALE:
+ /* value in mv = 1800mV / 4096 raw */
+ *val = 1800;
+ *val2 = 12;
+ return IIO_VAL_FRACTIONAL_LOG2;
+ default:
+ return -EINVAL;
+ }
+}
+
+static irqreturn_t sun20i_gpadc_irq_handler(int irq, void *data)
+{
+ struct sun20i_gpadc_iio *info = data;
+
+ /* clear data interrupt status register */
+ writel(GENMASK(31, 0), info->regs + SUN20I_GPADC_DATA_INTS);
+
+ complete(&info->completion);
+
+ return IRQ_HANDLED;
+}
+
+static const struct iio_info sun20i_gpadc_iio_info = {
+ .read_raw = sun20i_gpadc_read_raw,
+};
+
+static void sun20i_gpadc_reset_assert(void *data)
+{
+ struct reset_control *rst = data;
+
+ reset_control_assert(rst);
+}
+
+static int sun20i_gpadc_alloc_channels(struct iio_dev *indio_dev,
+ struct device *dev)
+{
+ unsigned int channel;
+ int num_channels, i, ret;
+ struct iio_chan_spec *channels;
+ struct fwnode_handle *node;
+
+ num_channels = device_get_child_node_count(dev);
+ if (num_channels == 0)
+ return dev_err_probe(dev, -ENODEV, "no channel children\n");
+
+ channels = devm_kcalloc(dev, num_channels, sizeof(*channels),
+ GFP_KERNEL);
+ if (!channels)
+ return -ENOMEM;
+
+ i = 0;
+ device_for_each_child_node(dev, node) {
+ ret = fwnode_property_read_u32(node, "reg", &channel);
+ if (ret) {
+ fwnode_handle_put(node);
+ return dev_err_probe(dev, ret, "invalid channel number\n");
+ }
+
+ channels[i].type = IIO_VOLTAGE;
+ channels[i].indexed = 1;
+ channels[i].channel = channel;
+ channels[i].info_mask_separate = BIT(IIO_CHAN_INFO_RAW);
+ channels[i].info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE);
+
+ i++;
+ }
+
+ indio_dev->channels = channels;
+ indio_dev->num_channels = num_channels;
+
+ return 0;
+}
+
+static int sun20i_gpadc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct iio_dev *indio_dev;
+ struct sun20i_gpadc_iio *info;
+ struct reset_control *rst;
+ struct clk *clk;
+ int irq;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*info));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ info = iio_priv(indio_dev);
+ info->last_channel = -1;
+
+ mutex_init(&info->lock);
+ init_completion(&info->completion);
+
+ ret = sun20i_gpadc_alloc_channels(indio_dev, dev);
+ if (ret)
+ return ret;
+
+ indio_dev->info = &sun20i_gpadc_iio_info;
+ indio_dev->name = SUN20I_GPADC_DRIVER_NAME;
+
+ info->regs = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(info->regs))
+ return PTR_ERR(info->regs);
+
+ clk = devm_clk_get_enabled(dev, NULL);
+ if (IS_ERR(clk))
+ return dev_err_probe(dev, PTR_ERR(clk), "failed to enable bus clock\n");
+
+ rst = devm_reset_control_get_exclusive(dev, NULL);
+ if (IS_ERR(rst))
+ return dev_err_probe(dev, PTR_ERR(rst), "failed to get reset control\n");
+
+ ret = reset_control_deassert(rst);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to deassert reset\n");
+
+ ret = devm_add_action_or_reset(dev, sun20i_gpadc_reset_assert, rst);
+ if (ret)
+ return ret;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ ret = devm_request_irq(dev, irq, sun20i_gpadc_irq_handler, 0,
+ dev_name(dev), info);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed requesting irq %d\n", irq);
+
+ writel(FIELD_PREP(SUN20I_GPADC_CTRL_ADC_AUTOCALI_EN_MASK, 1) |
+ FIELD_PREP(SUN20I_GPADC_CTRL_WORK_MODE_MASK, SUN20I_GPADC_WORK_MODE_SINGLE),
+ info->regs + SUN20I_GPADC_CTRL);
+
+ ret = devm_iio_device_register(dev, indio_dev);
+ if (ret)
+ return dev_err_probe(dev, ret, "could not register the device\n");
+
+ return 0;
+}
+
+static const struct of_device_id sun20i_gpadc_of_id[] = {
+ { .compatible = "allwinner,sun20i-d1-gpadc" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sun20i_gpadc_of_id);
+
+static struct platform_driver sun20i_gpadc_driver = {
+ .driver = {
+ .name = SUN20I_GPADC_DRIVER_NAME,
+ .of_match_table = sun20i_gpadc_of_id,
+ },
+ .probe = sun20i_gpadc_probe,
+};
+module_platform_driver(sun20i_gpadc_driver);
+
+MODULE_DESCRIPTION("ADC driver for sunxi platforms");
+MODULE_AUTHOR("Maksim Kiselev <[email protected]>");
+MODULE_LICENSE("GPL");
--
2.39.2
Allwinner's D1/T113s/R329/T507 SoCs have a new general purpose ADC.
This ADC is the same for all of this SoCs. The only difference is
the number of available channels.
Reviewed-by: Conor Dooley <[email protected]>
Signed-off-by: Maksim Kiselev <[email protected]>
---
.../iio/adc/allwinner,sun20i-d1-gpadc.yaml | 91 +++++++++++++++++++
1 file changed, 91 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml
diff --git a/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml b/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml
new file mode 100644
index 000000000000..23c584f5a6e6
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml
@@ -0,0 +1,91 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/allwinner,sun20i-d1-gpadc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner D1 General Purpose ADC
+
+maintainers:
+ - Maksim Kiselev <[email protected]>
+
+properties:
+ compatible:
+ enum:
+ - allwinner,sun20i-d1-gpadc
+
+ "#io-channel-cells":
+ const: 1
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+ clocks:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ reg:
+ maxItems: 1
+
+ resets:
+ maxItems: 1
+
+patternProperties:
+ "^channel@[0-9a-f]+$":
+ $ref: adc.yaml
+ type: object
+ description:
+ Represents the internal channels of the ADC.
+
+ properties:
+ reg:
+ items:
+ minimum: 0
+ maximum: 15
+
+ required:
+ - reg
+
+ unevaluatedProperties: false
+
+required:
+ - "#io-channel-cells"
+ - clocks
+ - compatible
+ - interrupts
+ - reg
+ - resets
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/sun20i-d1-ccu.h>
+ #include <dt-bindings/reset/sun20i-d1-ccu.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ gpadc: adc@2009000 {
+ compatible = "allwinner,sun20i-d1-gpadc";
+ reg = <0x2009000 0x1000>;
+ clocks = <&ccu CLK_BUS_GPADC>;
+ resets = <&ccu RST_BUS_GPADC>;
+ interrupts = <73 IRQ_TYPE_LEVEL_HIGH>;
+ #io-channel-cells = <1>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ channel@0 {
+ reg = <0>;
+ };
+
+ channel@1 {
+ reg = <1>;
+ };
+ };
+...
--
2.39.2
On Thu, Jun 15, 2023 at 11:55:22PM +0300, Maksim Kiselev wrote:
> This patch adds declaration of the general purpose ADC for D1
> and T113s SoCs.
>
> Signed-off-by: Maksim Kiselev <[email protected]>
Reviewed-by: Conor Dooley <[email protected]>
Cheers,
Conor.
On Thu, 15 Jun 2023 23:55:20 +0300
Maksim Kiselev <[email protected]> wrote:
> The General Purpose ADC (GPADC) can convert the external signal into
> a certain proportion of digital value, to realize the measurement of
> analog signal, which can be applied to power detection and key detection.
>
> Theoretically, this ADC can support up to 16 channels. All SoCs below
> contain this GPADC IP. The only difference between them is the number
> of available channels:
>
> T113 - 1 channel
> D1 - 2 channels
> R329 - 4 channels
> T507 - 4 channels
>
> Reviewed-by: Andy Shevchenko <[email protected]>
> Signed-off-by: Maksim Kiselev <[email protected]>
> ---
> drivers/iio/adc/Kconfig | 10 ++
> drivers/iio/adc/Makefile | 1 +
> drivers/iio/adc/sun20i-gpadc-iio.c | 276 +++++++++++++++++++++++++++++
> 3 files changed, 287 insertions(+)
> create mode 100644 drivers/iio/adc/sun20i-gpadc-iio.c
>
> diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> index eb2b09ef5d5b..deff7ae704ce 100644
> --- a/drivers/iio/adc/Kconfig
> +++ b/drivers/iio/adc/Kconfig
> @@ -1123,6 +1123,16 @@ config SUN4I_GPADC
> To compile this driver as a module, choose M here: the module will be
> called sun4i-gpadc-iio.
>
> +config SUN20I_GPADC
> + tristate "Support for the Allwinner SoCs GPADC"
I applied this and started a build test before noticing that this Kconfig description
is very vague and matches the one for the existing 4i driver...
The 'Support for the' bit also isn't appropriate for what you see in make menuconfig
menu etc. Please come up with something descriptive. Maybe
"sun20i and similar SoC GPADC"?
Bonus points if you change the text for the 4i at the same time to be
more meaningful. I clearly missed that in review a long time ago!
It's now too late anyway for the 6.5 cycle, so no particular rush though
I can queue this up for build testing whilst waiting for 6.5-rc1 to come
along (I'll rebase my tree on that once available) and it will then end up
in next etc.
Jonathan
> + depends on ARCH_SUNXI || COMPILE_TEST
> + help
> + Say yes here to build support for Allwinner (D1, T113, T507 and R329)
> + SoCs GPADC. This ADC provides up to 16 channels.
> +
> + To compile this driver as a module, choose M here: the module will be
> + called sun20i-gpadc-iio.
> +
сб, 17 июн. 2023 г. в 16:49, Jonathan Cameron <[email protected]>:
>
> On Thu, 15 Jun 2023 23:55:20 +0300
> Maksim Kiselev <[email protected]> wrote:
>
> > The General Purpose ADC (GPADC) can convert the external signal into
> > a certain proportion of digital value, to realize the measurement of
> > analog signal, which can be applied to power detection and key detection.
> >
> > Theoretically, this ADC can support up to 16 channels. All SoCs below
> > contain this GPADC IP. The only difference between them is the number
> > of available channels:
> >
> > T113 - 1 channel
> > D1 - 2 channels
> > R329 - 4 channels
> > T507 - 4 channels
> >
> > Reviewed-by: Andy Shevchenko <[email protected]>
> > Signed-off-by: Maksim Kiselev <[email protected]>
> > ---
> > drivers/iio/adc/Kconfig | 10 ++
> > drivers/iio/adc/Makefile | 1 +
> > drivers/iio/adc/sun20i-gpadc-iio.c | 276 +++++++++++++++++++++++++++++
> > 3 files changed, 287 insertions(+)
> > create mode 100644 drivers/iio/adc/sun20i-gpadc-iio.c
> >
> > diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> > index eb2b09ef5d5b..deff7ae704ce 100644
> > --- a/drivers/iio/adc/Kconfig
> > +++ b/drivers/iio/adc/Kconfig
> > @@ -1123,6 +1123,16 @@ config SUN4I_GPADC
> > To compile this driver as a module, choose M here: the module will be
> > called sun4i-gpadc-iio.
> >
> > +config SUN20I_GPADC
> > + tristate "Support for the Allwinner SoCs GPADC"
> I applied this and started a build test before noticing that this Kconfig description
> is very vague and matches the one for the existing 4i driver...
Indeed. I must have forgotten to change this line when copying from sun4i...
> The 'Support for the' bit also isn't appropriate for what you see in make menuconfig
> menu etc. Please come up with something descriptive. Maybe
> "sun20i and similar SoC GPADC"?
>
> Bonus points if you change the text for the 4i at the same time to be
> more meaningful. I clearly missed that in review a long time ago!
Should I do this in a separate patch?
On Sat, 17 Jun 2023 21:52:12 +0300
Maxim Kiselev <[email protected]> wrote:
> сб, 17 июн. 2023 г. в 16:49, Jonathan Cameron <[email protected]>:
> >
> > On Thu, 15 Jun 2023 23:55:20 +0300
> > Maksim Kiselev <[email protected]> wrote:
> >
> > > The General Purpose ADC (GPADC) can convert the external signal into
> > > a certain proportion of digital value, to realize the measurement of
> > > analog signal, which can be applied to power detection and key detection.
> > >
> > > Theoretically, this ADC can support up to 16 channels. All SoCs below
> > > contain this GPADC IP. The only difference between them is the number
> > > of available channels:
> > >
> > > T113 - 1 channel
> > > D1 - 2 channels
> > > R329 - 4 channels
> > > T507 - 4 channels
> > >
> > > Reviewed-by: Andy Shevchenko <[email protected]>
> > > Signed-off-by: Maksim Kiselev <[email protected]>
> > > ---
> > > drivers/iio/adc/Kconfig | 10 ++
> > > drivers/iio/adc/Makefile | 1 +
> > > drivers/iio/adc/sun20i-gpadc-iio.c | 276 +++++++++++++++++++++++++++++
> > > 3 files changed, 287 insertions(+)
> > > create mode 100644 drivers/iio/adc/sun20i-gpadc-iio.c
> > >
> > > diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> > > index eb2b09ef5d5b..deff7ae704ce 100644
> > > --- a/drivers/iio/adc/Kconfig
> > > +++ b/drivers/iio/adc/Kconfig
> > > @@ -1123,6 +1123,16 @@ config SUN4I_GPADC
> > > To compile this driver as a module, choose M here: the module will be
> > > called sun4i-gpadc-iio.
> > >
> > > +config SUN20I_GPADC
> > > + tristate "Support for the Allwinner SoCs GPADC"
> > I applied this and started a build test before noticing that this Kconfig description
> > is very vague and matches the one for the existing 4i driver...
>
> Indeed. I must have forgotten to change this line when copying from sun4i...
>
> > The 'Support for the' bit also isn't appropriate for what you see in make menuconfig
> > menu etc. Please come up with something descriptive. Maybe
> > "sun20i and similar SoC GPADC"?
> >
> > Bonus points if you change the text for the 4i at the same time to be
> > more meaningful. I clearly missed that in review a long time ago!
>
> Should I do this in a separate patch?
Yes please.
Thanks,
Jonathan