From: Simon Xue <xxm@xxxxxxxxxxxxxx>
Add new start and read functions to support rk3588 device.
Also, add a device compatible string for the same.
Signed-off-by: Simon Xue <xxm@xxxxxxxxxxxxxx>
Signed-off-by: Shreeya Patel <shreeya.patel@xxxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
---
Changes in v3
- Add bitfield.h header file.
- Add a Reviewed-by tag.
Changes in v2
- Add a from address.
- Create separate patches for adding new device support and changes to
the old device code.
- Make use of FIELD_PREP.
drivers/iio/adc/rockchip_saradc.c | 70 +++++++++++++++++++++++++++++++
1 file changed, 70 insertions(+)
diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c
index 21f9d92a6af4..312286ec91dc 100644
--- a/drivers/iio/adc/rockchip_saradc.c
+++ b/drivers/iio/adc/rockchip_saradc.c
@@ -4,6 +4,7 @@
* Copyright (C) 2014 ROCKCHIP, Inc.
*/
+#include <linux/bitfield.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
@@ -38,6 +39,22 @@
#define SARADC_TIMEOUT msecs_to_jiffies(100)
#define SARADC_MAX_CHANNELS 8
+/* v2 registers */
+#define SARADC2_CONV_CON 0x0
+#define SARADC_T_PD_SOC 0x4
+#define SARADC_T_DAS_SOC 0xc
+#define SARADC2_END_INT_EN 0x104
+#define SARADC2_ST_CON 0x108
+#define SARADC2_STATUS 0x10c
+#define SARADC2_END_INT_ST 0x110
+#define SARADC2_DATA_BASE 0x120
+
+#define SARADC2_EN_END_INT BIT(0)
+#define SARADC2_START BIT(4)
+#define SARADC2_SINGLE_MODE BIT(5)
+
+#define SARADC2_CONV_CHANNELS GENMASK(15, 0)
+
struct rockchip_saradc;
struct rockchip_saradc_data {
@@ -76,6 +93,25 @@ static void rockchip_saradc_start_v1(struct rockchip_saradc *info, int chn)
SARADC_CTRL_IRQ_ENABLE, info->regs + SARADC_CTRL);
}
+static void rockchip_saradc_start_v2(struct rockchip_saradc *info, int chn)
+{
+ int val;
+
+ if (info->reset)
+ rockchip_saradc_reset_controller(info->reset);
+
+ writel_relaxed(0xc, info->regs + SARADC_T_DAS_SOC);
+ writel_relaxed(0x20, info->regs + SARADC_T_PD_SOC);
+ val = FIELD_PREP(SARADC2_EN_END_INT, 1);
+ val |= val << 16;
+ writel_relaxed(val, info->regs + SARADC2_END_INT_EN);
+ val = FIELD_PREP(SARADC2_START, 1) |
+ FIELD_PREP(SARADC2_SINGLE_MODE, 1) |
+ FIELD_PREP(SARADC2_CONV_CHANNELS, chn);
+ val |= val << 16;
+ writel(val, info->regs + SARADC2_CONV_CON);
+}
+
static void rockchip_saradc_start(struct rockchip_saradc *info, int chn)
{
info->data->start(info, chn);
@@ -86,6 +122,18 @@ static int rockchip_saradc_read_v1(struct rockchip_saradc *info)
return readl_relaxed(info->regs + SARADC_DATA);
}
+static int rockchip_saradc_read_v2(struct rockchip_saradc *info)
+{
+ int offset;
+
+ /* Clear irq */
+ writel_relaxed(0x1, info->regs + SARADC2_END_INT_ST);
+
+ offset = SARADC2_DATA_BASE + info->last_chan->channel * 0x4;
+
+ return readl_relaxed(info->regs + offset);
+}
+
static int rockchip_saradc_read(struct rockchip_saradc *info)
{
return info->data->read(info);
@@ -248,6 +296,25 @@ static const struct rockchip_saradc_data rk3568_saradc_data = {
.power_down = rockchip_saradc_power_down_v1,
};
+static const struct iio_chan_spec rockchip_rk3588_saradc_iio_channels[] = {
+ SARADC_CHANNEL(0, "adc0", 12),
+ SARADC_CHANNEL(1, "adc1", 12),
+ SARADC_CHANNEL(2, "adc2", 12),
+ SARADC_CHANNEL(3, "adc3", 12),
+ SARADC_CHANNEL(4, "adc4", 12),
+ SARADC_CHANNEL(5, "adc5", 12),
+ SARADC_CHANNEL(6, "adc6", 12),
+ SARADC_CHANNEL(7, "adc7", 12),
+};
+
+static const struct rockchip_saradc_data rk3588_saradc_data = {
+ .channels = rockchip_rk3588_saradc_iio_channels,
+ .num_channels = ARRAY_SIZE(rockchip_rk3588_saradc_iio_channels),
+ .clk_rate = 1000000,
+ .start = rockchip_saradc_start_v2,
+ .read = rockchip_saradc_read_v2,
+};
+
static const struct of_device_id rockchip_saradc_match[] = {
{
.compatible = "rockchip,saradc",
@@ -261,6 +328,9 @@ static const struct of_device_id rockchip_saradc_match[] = {
}, {
.compatible = "rockchip,rk3568-saradc",
.data = &rk3568_saradc_data,
+ }, {
+ .compatible = "rockchip,rk3588-saradc",
+ .data = &rk3588_saradc_data,
},
{},
};
--
2.30.2
