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@@ -18,6 +18,7 @@
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#include <linux/delay.h>
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#include <linux/math64.h>
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#include <linux/bitfield.h>
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+#include <power/regulator.h>
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#define MESON_SAR_ADC_REG0 0x00
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#define MESON_SAR_ADC_REG0_PANEL_DETECT BIT(31)
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@@ -656,7 +657,10 @@ static int meson_saradc_stop(struct udevice *dev)
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static int meson_saradc_probe(struct udevice *dev)
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{
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+ struct adc_uclass_plat *uc_pdata = dev_get_uclass_plat(dev);
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struct meson_saradc_priv *priv = dev_get_priv(dev);
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+ struct udevice *vref;
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+ int vref_uv;
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int ret;
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ret = regmap_init_mem(dev_ofnode(dev), &priv->regmap);
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@@ -675,6 +679,23 @@ static int meson_saradc_probe(struct udevice *dev)
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priv->active_channel = -1;
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+ ret = device_get_supply_regulator(dev, "vref-supply", &vref);
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+ if (ret) {
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+ printf("can't get vref-supply: %d\n", ret);
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+ return ret;
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+ }
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+
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+ vref_uv = regulator_get_value(vref);
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+ if (vref_uv < 0) {
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+ printf("can't get vref-supply value: %d\n", vref_uv);
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+ return vref_uv;
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+ }
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+
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+ /* VDD supplied by common vref pin */
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+ uc_pdata->vdd_supply = vref;
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+ uc_pdata->vdd_microvolts = vref_uv;
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+ uc_pdata->vss_microvolts = 0;
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+
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return 0;
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}
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