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iio: adc: sc27xx: add support for PMIC sc2730 

sc2730 is the product of sc27xx series.

Co-developed-by: Yuming Zhu <yuming.zhu1@unisoc.com>
Signed-off-by: Yuming Zhu <yuming.zhu1@unisoc.com>
Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com>
Link: https://lore.kernel.org/r/20220419142458.884933-8-gengcixi@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Cixi Geng 2022-04-19 22:24:58 +08:00 committed by Jonathan Cameron
parent fff4a7a890
commit 0ac507bbc7
1 changed files with 116 additions and 0 deletions
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116
drivers/iio/adc/sc27xx_adc.c
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@ -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)
@ -301,6 +303,80 @@ 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) {
@ -357,6 +433,33 @@ 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++) {
switch (i) {
case 5:
case 10:
case 19:
case 30:
case 31:
data->channel_scale[i] = 3;
break;
case 7:
case 9:
data->channel_scale[i] = 2;
break;
case 13:
data->channel_scale[i] = 1;
break;
default:
data->channel_scale[i] = 0;
break;
}
}
}
static void sc2731_adc_scale_init(struct sc27xx_adc_data *data)
{
int i;
@ -718,6 +821,18 @@ static const struct sc27xx_adc_variant_data sc2731_data = {
.set_volref = false,
};
static const struct sc27xx_adc_variant_data sc2730_data = {
.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,
.set_volref = false,
};
static const struct sc27xx_adc_variant_data sc2721_data = {
.module_en = SC2731_MODULE_EN,
.clk_en = SC2721_ARM_CLK_EN,
@ -829,6 +944,7 @@ 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},
{ }