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Subject[PATCH V2 5/7] iio: adc: sc27xx: add support for PMIC sc2730
Date
From: Cixi Geng <cixi.geng1@unisoc.com>

sc2730 is the product of sc27xx series.

Signed-off-by: Yuming Zhu <yuming.zhu1@unisoc.com>
Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com>
---
drivers/iio/adc/sc27xx_adc.c | 108 ++++++++++++++++++++++++++++++++++-
1 file changed, 107 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/sc27xx_adc.c b/drivers/iio/adc/sc27xx_adc.c
index 2603ce313b07..b89637c051ac 100644
--- a/drivers/iio/adc/sc27xx_adc.c
+++ b/drivers/iio/adc/sc27xx_adc.c
@@ -13,9 +13,11 @@
#include <linux/slab.h>

/* PMIC global registers definition */
+#define SC2730_MODULE_EN 0x1808
#define SC2731_MODULE_EN 0xc08
#define SC27XX_MODULE_ADC_EN BIT(5)
#define SC2721_ARM_CLK_EN 0xc0c
+#define SC2730_ARM_CLK_EN 0x180c
#define SC2731_ARM_CLK_EN 0xc10
#define SC27XX_CLK_ADC_EN BIT(5)
#define SC27XX_CLK_ADC_CLK_EN BIT(6)
@@ -293,6 +295,80 @@ static int sc2721_adc_get_ratio(int channel, int scale)
return SC27XX_VOLT_RATIO(1, 1);
}

+static int sc2730_adc_get_ratio(int channel, int scale)
+{
+ switch (channel) {
+ case 14:
+ switch (scale) {
+ case 0:
+ return SC27XX_VOLT_RATIO(68, 900);
+ case 1:
+ return SC27XX_VOLT_RATIO(68, 1760);
+ case 2:
+ return SC27XX_VOLT_RATIO(68, 2327);
+ case 3:
+ return SC27XX_VOLT_RATIO(68, 3654);
+ default:
+ return SC27XX_VOLT_RATIO(1, 1);
+ }
+ case 15:
+ switch (scale) {
+ case 0:
+ return SC27XX_VOLT_RATIO(1, 3);
+ case 1:
+ return SC27XX_VOLT_RATIO(1000, 5865);
+ case 2:
+ return SC27XX_VOLT_RATIO(500, 3879);
+ case 3:
+ return SC27XX_VOLT_RATIO(500, 6090);
+ default:
+ return SC27XX_VOLT_RATIO(1, 1);
+ }
+ case 16:
+ switch (scale) {
+ case 0:
+ return SC27XX_VOLT_RATIO(48, 100);
+ case 1:
+ return SC27XX_VOLT_RATIO(480, 1955);
+ case 2:
+ return SC27XX_VOLT_RATIO(480, 2586);
+ case 3:
+ return SC27XX_VOLT_RATIO(48, 406);
+ default:
+ return SC27XX_VOLT_RATIO(1, 1);
+ }
+ case 21:
+ case 22:
+ case 23:
+ switch (scale) {
+ case 0:
+ return SC27XX_VOLT_RATIO(3, 8);
+ case 1:
+ return SC27XX_VOLT_RATIO(375, 1955);
+ case 2:
+ return SC27XX_VOLT_RATIO(375, 2586);
+ case 3:
+ return SC27XX_VOLT_RATIO(300, 3248);
+ default:
+ return SC27XX_VOLT_RATIO(1, 1);
+ }
+ default:
+ switch (scale) {
+ case 0:
+ return SC27XX_VOLT_RATIO(1, 1);
+ case 1:
+ return SC27XX_VOLT_RATIO(1000, 1955);
+ case 2:
+ return SC27XX_VOLT_RATIO(1000, 2586);
+ case 3:
+ return SC27XX_VOLT_RATIO(1000, 4060);
+ default:
+ return SC27XX_VOLT_RATIO(1, 1);
+ }
+ }
+ return SC27XX_VOLT_RATIO(1, 1);
+}
+
static int sc2731_adc_get_ratio(int channel, int scale)
{
switch (channel) {
@@ -349,6 +425,22 @@ static void sc2720_adc_scale_init(struct sc27xx_adc_data *data)
}
}

+static void sc2730_adc_scale_init(struct sc27xx_adc_data *data)
+{
+ int i;
+
+ for (i = 0; i < SC27XX_ADC_CHANNEL_MAX; i++) {
+ if (i == 5 || i == 10 || i == 19 || i == 30 || i == 31)
+ data->channel_scale[i] = 3;
+ else if (i == 7 || i == 9)
+ data->channel_scale[i] = 2;
+ else if (i == 13)
+ data->channel_scale[i] = 1;
+ else
+ data->channel_scale[i] = 0;
+ }
+}
+
static void sc2731_adc_scale_init(struct sc27xx_adc_data *data)
{
int i;
@@ -449,7 +541,8 @@ static int sc27xx_adc_read(struct sc27xx_adc_data *data, int channel,
SC27XX_ADC_REFVOL_VDD28,
SC27XX_ADC_REFVOL_VDD28);
if (ret_volref) {
- dev_err(data->dev, "failed to set the volref 2.8V, ret_volref = 0x%x\n,ret_volref");
+ dev_err(data->dev, "failed to set the volref 2.8V, ret_volref = 0x%x\n",
+ ret_volref);
ret = ret || ret_volref;
}
}
@@ -695,6 +788,18 @@ static const struct sc27xx_adc_variant_data sc2731_data = {
.get_ratio = sc2731_adc_get_ratio,
};

+static const struct sc27xx_adc_variant_data sc2730_data = {
+ .pmic_type = SC27XX_ADC,
+ .module_en = SC2730_MODULE_EN,
+ .clk_en = SC2730_ARM_CLK_EN,
+ .scale_shift = SC27XX_ADC_SCALE_SHIFT,
+ .scale_mask = SC27XX_ADC_SCALE_MASK,
+ .bscale_cal = &big_scale_graph_calib,
+ .sscale_cal = &small_scale_graph_calib,
+ .init_scale = sc2730_adc_scale_init,
+ .get_ratio = sc2730_adc_get_ratio,
+};
+
static const struct sc27xx_adc_variant_data sc2721_data = {
.pmic_type = SC2721_ADC,
.module_en = SC2731_MODULE_EN,
@@ -809,6 +914,7 @@ static int sc27xx_adc_probe(struct platform_device *pdev)

static const struct of_device_id sc27xx_adc_of_match[] = {
{ .compatible = "sprd,sc2731-adc", .data = &sc2731_data},
+ { .compatible = "sprd,sc2730-adc", .data = &sc2730_data},
{ .compatible = "sprd,sc2721-adc", .data = &sc2721_data},
{ .compatible = "sprd,sc2720-adc", .data = &sc2720_data},
{ }
--
2.25.1
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