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From cc2b0e2c164d02ab42efa736f91f53baf8d8bc36 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Thu, 20 Apr 2017 22:41:20 +0200
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Subject: [PATCH 05/16] ACPI / PMIC: xpower: Add support for the GPI1 regulator
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to the OpRegion handler
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Some Bay Trail devices use a GPI1 regulator field (address 0x4c) in
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their 0x8d power OpRegion, add support for this.
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This fixes AE_BAD_PARAMETER errors getting thrown on these devices and
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fixes these errors causing these devices to not suspend.
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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---
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Changes in v2:
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-Simplify reg == 0x92 handling (suggested by Andy Shevchenko)
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-Add special handling for reg == 0x92 to intel_xpower_pmic_get_power() too
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Changes in v3:
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-Use defines for GPI1 reg and bits, rather then hardcoded hex values
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---
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drivers/acpi/pmic/intel_pmic_xpower.c | 21 ++++++++++++++++++++-
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1 file changed, 20 insertions(+), 1 deletion(-)
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diff --git a/drivers/acpi/pmic/intel_pmic_xpower.c b/drivers/acpi/pmic/intel_pmic_xpower.c
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index 1a76c784cd4c..3b7d5be5b7ed 100644
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--- a/drivers/acpi/pmic/intel_pmic_xpower.c
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+++ b/drivers/acpi/pmic/intel_pmic_xpower.c
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@@ -21,6 +21,11 @@
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#include "intel_pmic.h"
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#define XPOWER_GPADC_LOW 0x5b
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+#define XPOWER_GPI1_CTRL 0x92
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+
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+#define GPI1_LDO_MASK GENMASK(2, 0)
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+#define GPI1_LDO_ON (3 << 0)
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+#define GPI1_LDO_OFF (4 << 0)
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static struct pmic_table power_table[] = {
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{
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@@ -118,6 +123,10 @@ static struct pmic_table power_table[] = {
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.reg = 0x10,
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.bit = 0x00
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}, /* BUC6 */
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+ {
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+ .address = 0x4c,
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+ .reg = 0x92,
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+ }, /* GPI1 */
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};
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/* TMP0 - TMP5 are the same, all from GPADC */
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@@ -156,7 +165,12 @@ static int intel_xpower_pmic_get_power(struct regmap *regmap, int reg,
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if (regmap_read(regmap, reg, &data))
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return -EIO;
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- *value = (data & BIT(bit)) ? 1 : 0;
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+ /* GPIO1 LDO regulator needs special handling */
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+ if (reg == XPOWER_GPI1_CTRL)
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+ *value = ((data & GPI1_LDO_MASK) == GPI1_LDO_ON);
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+ else
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+ *value = (data & BIT(bit)) ? 1 : 0;
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+
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return 0;
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}
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@@ -165,6 +179,11 @@ static int intel_xpower_pmic_update_power(struct regmap *regmap, int reg,
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{
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int data;
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+ /* GPIO1 LDO regulator needs special handling */
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+ if (reg == XPOWER_GPI1_CTRL)
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+ return regmap_update_bits(regmap, reg, GPI1_LDO_MASK,
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+ on ? GPI1_LDO_ON : GPI1_LDO_OFF);
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+
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if (regmap_read(regmap, reg, &data))
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return -EIO;
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--
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2.13.0
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