ACPI / PMIC: Add generic intel_soc_pmic_exec_mipi_pmic_seq_element handling

Most PMIC-s use only a single i2c-address, so after verifying the
i2c-address matches, we can simply pass the call to regmap_update_bits.

This commit adds support for this and hooks this up for the xpower AXP288
PMIC by setting the new pmic_i2c_address field.

This fixes the following errors on display on / off on a Jumper Ezpad
mini 3 and an Onda V80 plus tablet, both of which use the AXP288:

intel_soc_pmic_exec_mipi_pmic_seq_element: Not implemented
intel_soc_pmic_exec_mipi_pmic_seq_element: i2c-addr: 0x34 reg-addr ...
[drm:mipi_exec_pmic [i915]] *ERROR* mipi_exec_pmic failed, error: -95

Instead of these errors on both devices we now correctly turn on / off
DLDO3 (through direct register manipulation). On the Onda V80 plus this
fixes an issue with the backlight being brighter around the borders after
an off / on cycle. This should also help to save some power when the
display is off.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190107111556.4510-4-hdegoede@redhat.com

diff --git a/drivers/acpi/pmic/intel_pmic.c b/drivers/acpi/pmic/intel_pmic.c
index 471afee..c14cfae 100644 (file)
--- a/drivers/acpi/pmic/intel_pmic.c
+++ b/drivers/acpi/pmic/intel_pmic.c
@@ -359,6 +359,15 @@ int intel_soc_pmic_exec_mipi_pmic_seq_element(u16 i2c_address, u32 reg_address,
                ret = d->exec_mipi_pmic_seq_element(intel_pmic_opregion->regmap,
                                                    i2c_address, reg_address,
                                                    value, mask);
+       } else if (d->pmic_i2c_address) {
+               if (i2c_address == d->pmic_i2c_address) {
+                       ret = regmap_update_bits(intel_pmic_opregion->regmap,
+                                                reg_address, mask, value);
+               } else {
+                       pr_err("%s: Unexpected i2c-addr: 0x%02x (reg-addr 0x%x value 0x%x mask 0x%x)\n",
+                              __func__, i2c_address, reg_address, value, mask);
+                       ret = -ENXIO;
+               }
        } else {
                pr_warn("%s: Not implemented\n", __func__);
                pr_warn("%s: i2c-addr: 0x%x reg-addr 0x%x value 0x%x mask 0x%x\n",

diff --git a/drivers/acpi/pmic/intel_pmic.h b/drivers/acpi/pmic/intel_pmic.h
index 5cd195f..8937947 100644 (file)
--- a/drivers/acpi/pmic/intel_pmic.h
+++ b/drivers/acpi/pmic/intel_pmic.h
@@ -21,6 +21,8 @@ struct intel_pmic_opregion_data {
        int power_table_count;
        struct pmic_table *thermal_table;
        int thermal_table_count;
+       /* For generic exec_mipi_pmic_seq_element handling */
+       int pmic_i2c_address;
 };
 
 int intel_pmic_install_opregion_handler(struct device *dev, acpi_handle handle, struct regmap *regmap, struct intel_pmic_opregion_data *d);

diff --git a/drivers/acpi/pmic/intel_pmic_xpower.c b/drivers/acpi/pmic/intel_pmic_xpower.c
index 2579675..1b49cbb 100644 (file)
--- a/drivers/acpi/pmic/intel_pmic_xpower.c
+++ b/drivers/acpi/pmic/intel_pmic_xpower.c
@@ -240,6 +240,7 @@ static struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = {
        .power_table_count = ARRAY_SIZE(power_table),
        .thermal_table = thermal_table,
        .thermal_table_count = ARRAY_SIZE(thermal_table),
+       .pmic_i2c_address = 0x34,
 };
 
 static acpi_status intel_xpower_pmic_gpio_handler(u32 function,