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authorSimon Xue <xxm@rock-chips.com>2023-06-03 20:53:33 +0200
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2023-06-04 12:19:39 +0200
commitfb1c13d595857ccff49cbb69ddcdc08594a832e7 (patch)
treef56e026910f5793eb8feeec62d5433fce4f85264 /drivers
parentiio: temperature: tmp006: Add OF device matching support (diff)
downloadlinux-fb1c13d595857ccff49cbb69ddcdc08594a832e7.tar.xz
linux-fb1c13d595857ccff49cbb69ddcdc08594a832e7.zip
iio: adc: rockchip_saradc: Add callback functions
Add start, read and power_down callback functions, which will help in adding new rockchip device support cleanly. Signed-off-by: Simon Xue <xxm@rock-chips.com> Signed-off-by: Shreeya Patel <shreeya.patel@collabora.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20230603185340.13838-2-shreeya.patel@collabora.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/iio/adc/rockchip_saradc.c64
1 files changed, 52 insertions, 12 deletions
diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c
index 79448c5ffc2a..21f9d92a6af4 100644
--- a/drivers/iio/adc/rockchip_saradc.c
+++ b/drivers/iio/adc/rockchip_saradc.c
@@ -38,10 +38,15 @@
#define SARADC_TIMEOUT msecs_to_jiffies(100)
#define SARADC_MAX_CHANNELS 8
+struct rockchip_saradc;
+
struct rockchip_saradc_data {
const struct iio_chan_spec *channels;
int num_channels;
unsigned long clk_rate;
+ void (*start)(struct rockchip_saradc *info, int chn);
+ int (*read)(struct rockchip_saradc *info);
+ void (*power_down)(struct rockchip_saradc *info);
};
struct rockchip_saradc {
@@ -60,27 +65,50 @@ struct rockchip_saradc {
struct notifier_block nb;
};
-static void rockchip_saradc_power_down(struct rockchip_saradc *info)
+static void rockchip_saradc_reset_controller(struct reset_control *reset);
+
+static void rockchip_saradc_start_v1(struct rockchip_saradc *info, int chn)
+{
+ /* 8 clock periods as delay between power up and start cmd */
+ writel_relaxed(8, info->regs + SARADC_DLY_PU_SOC);
+ /* Select the channel to be used and trigger conversion */
+ writel(SARADC_CTRL_POWER_CTRL | (chn & SARADC_CTRL_CHN_MASK) |
+ SARADC_CTRL_IRQ_ENABLE, info->regs + SARADC_CTRL);
+}
+
+static void rockchip_saradc_start(struct rockchip_saradc *info, int chn)
+{
+ info->data->start(info, chn);
+}
+
+static int rockchip_saradc_read_v1(struct rockchip_saradc *info)
+{
+ return readl_relaxed(info->regs + SARADC_DATA);
+}
+
+static int rockchip_saradc_read(struct rockchip_saradc *info)
+{
+ return info->data->read(info);
+}
+
+static void rockchip_saradc_power_down_v1(struct rockchip_saradc *info)
{
- /* Clear irq & power down adc */
writel_relaxed(0, info->regs + SARADC_CTRL);
}
+static void rockchip_saradc_power_down(struct rockchip_saradc *info)
+{
+ if (info->data->power_down)
+ info->data->power_down(info);
+}
+
static int rockchip_saradc_conversion(struct rockchip_saradc *info,
struct iio_chan_spec const *chan)
{
reinit_completion(&info->completion);
- /* 8 clock periods as delay between power up and start cmd */
- writel_relaxed(8, info->regs + SARADC_DLY_PU_SOC);
-
info->last_chan = chan;
-
- /* Select the channel to be used and trigger conversion */
- writel(SARADC_CTRL_POWER_CTRL
- | (chan->channel & SARADC_CTRL_CHN_MASK)
- | SARADC_CTRL_IRQ_ENABLE,
- info->regs + SARADC_CTRL);
+ rockchip_saradc_start(info, chan->channel);
if (!wait_for_completion_timeout(&info->completion, SARADC_TIMEOUT))
return -ETIMEDOUT;
@@ -123,7 +151,7 @@ static irqreturn_t rockchip_saradc_isr(int irq, void *dev_id)
struct rockchip_saradc *info = dev_id;
/* Read value */
- info->last_val = readl_relaxed(info->regs + SARADC_DATA);
+ info->last_val = rockchip_saradc_read(info);
info->last_val &= GENMASK(info->last_chan->scan_type.realbits - 1, 0);
rockchip_saradc_power_down(info);
@@ -163,6 +191,9 @@ static const struct rockchip_saradc_data saradc_data = {
.channels = rockchip_saradc_iio_channels,
.num_channels = ARRAY_SIZE(rockchip_saradc_iio_channels),
.clk_rate = 1000000,
+ .start = rockchip_saradc_start_v1,
+ .read = rockchip_saradc_read_v1,
+ .power_down = rockchip_saradc_power_down_v1,
};
static const struct iio_chan_spec rockchip_rk3066_tsadc_iio_channels[] = {
@@ -174,6 +205,9 @@ static const struct rockchip_saradc_data rk3066_tsadc_data = {
.channels = rockchip_rk3066_tsadc_iio_channels,
.num_channels = ARRAY_SIZE(rockchip_rk3066_tsadc_iio_channels),
.clk_rate = 50000,
+ .start = rockchip_saradc_start_v1,
+ .read = rockchip_saradc_read_v1,
+ .power_down = rockchip_saradc_power_down_v1,
};
static const struct iio_chan_spec rockchip_rk3399_saradc_iio_channels[] = {
@@ -189,6 +223,9 @@ static const struct rockchip_saradc_data rk3399_saradc_data = {
.channels = rockchip_rk3399_saradc_iio_channels,
.num_channels = ARRAY_SIZE(rockchip_rk3399_saradc_iio_channels),
.clk_rate = 1000000,
+ .start = rockchip_saradc_start_v1,
+ .read = rockchip_saradc_read_v1,
+ .power_down = rockchip_saradc_power_down_v1,
};
static const struct iio_chan_spec rockchip_rk3568_saradc_iio_channels[] = {
@@ -206,6 +243,9 @@ static const struct rockchip_saradc_data rk3568_saradc_data = {
.channels = rockchip_rk3568_saradc_iio_channels,
.num_channels = ARRAY_SIZE(rockchip_rk3568_saradc_iio_channels),
.clk_rate = 1000000,
+ .start = rockchip_saradc_start_v1,
+ .read = rockchip_saradc_read_v1,
+ .power_down = rockchip_saradc_power_down_v1,
};
static const struct of_device_id rockchip_saradc_match[] = {