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iio: adc: aspeed: Add AST2700 ADC support

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This patch adds support for the ADCs found on the Aspeed AST2700 SoC,
which includes two instances: "ast2700-adc0" and "ast2700-adc1". While
they are functionally similar to those on AST2600, the OTP trimming data
is located at the same offset (0x820), but uses different bitfields.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Billy Tsai
2025-11-03 18:52:17 +08:00
committed by Jonathan Cameron
parent 436cd77125
commit 9d8b88ffb7
1 changed files with 34 additions and 0 deletions
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34
drivers/iio/adc/aspeed_adc.c
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@@ -645,6 +645,16 @@ static const struct aspeed_adc_trim_locate ast2600_adc1_trim = {
.field = GENMASK(7, 4), .field = GENMASK(7, 4),
}; };
static const struct aspeed_adc_trim_locate ast2700_adc0_trim = {
.offset = 0x820,
.field = GENMASK(3, 0),
};
static const struct aspeed_adc_trim_locate ast2700_adc1_trim = {
.offset = 0x820,
.field = GENMASK(7, 4),
};
static const struct aspeed_adc_model_data ast2400_model_data = { static const struct aspeed_adc_model_data ast2400_model_data = {
.model_name = "ast2400-adc", .model_name = "ast2400-adc",
.vref_fixed_mv = 2500, .vref_fixed_mv = 2500,
@@ -689,11 +699,35 @@ static const struct aspeed_adc_model_data ast2600_adc1_model_data = {
.trim_locate = &ast2600_adc1_trim, .trim_locate = &ast2600_adc1_trim,
}; };
static const struct aspeed_adc_model_data ast2700_adc0_model_data = {
.model_name = "ast2700-adc0",
.min_sampling_rate = 10000,
.max_sampling_rate = 500000,
.wait_init_sequence = true,
.bat_sense_sup = true,
.scaler_bit_width = 16,
.num_channels = 8,
.trim_locate = &ast2700_adc0_trim,
};
static const struct aspeed_adc_model_data ast2700_adc1_model_data = {
.model_name = "ast2700-adc1",
.min_sampling_rate = 10000,
.max_sampling_rate = 500000,
.wait_init_sequence = true,
.bat_sense_sup = true,
.scaler_bit_width = 16,
.num_channels = 8,
.trim_locate = &ast2700_adc1_trim,
};
static const struct of_device_id aspeed_adc_matches[] = { static const struct of_device_id aspeed_adc_matches[] = {
{ .compatible = "aspeed,ast2400-adc", .data = &ast2400_model_data }, { .compatible = "aspeed,ast2400-adc", .data = &ast2400_model_data },
{ .compatible = "aspeed,ast2500-adc", .data = &ast2500_model_data }, { .compatible = "aspeed,ast2500-adc", .data = &ast2500_model_data },
{ .compatible = "aspeed,ast2600-adc0", .data = &ast2600_adc0_model_data }, { .compatible = "aspeed,ast2600-adc0", .data = &ast2600_adc0_model_data },
{ .compatible = "aspeed,ast2600-adc1", .data = &ast2600_adc1_model_data }, { .compatible = "aspeed,ast2600-adc1", .data = &ast2600_adc1_model_data },
{ .compatible = "aspeed,ast2700-adc0", .data = &ast2700_adc0_model_data },
{ .compatible = "aspeed,ast2700-adc1", .data = &ast2700_adc1_model_data },
{ } { }
}; };
MODULE_DEVICE_TABLE(of, aspeed_adc_matches); MODULE_DEVICE_TABLE(of, aspeed_adc_matches);