Commit 0ac507bb authored by Cixi Geng's avatar Cixi Geng Committed by Jonathan Cameron
Browse files

iio: adc: sc27xx: add support for PMIC sc2730 



sc2730 is the product of sc27xx series.

Co-developed-by: default avatarYuming Zhu <yuming.zhu1@unisoc.com>
Signed-off-by: default avatarYuming Zhu <yuming.zhu1@unisoc.com>
Signed-off-by: default avatarCixi Geng <cixi.geng1@unisoc.com>
Link: https://lore.kernel.org/r/20220419142458.884933-8-gengcixi@gmail.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent fff4a7a8

drivers/iio/adc/sc27xx_adc.c

+116 −0
Original line number Diff line number Diff line
@@ -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},

	{ }