diff options
| -rw-r--r-- | drivers/acpi/pmic/intel_pmic.c | 52 | ||||
| -rw-r--r-- | drivers/acpi/pmic/intel_pmic.h | 2 | ||||
| -rw-r--r-- | include/linux/mfd/intel_soc_pmic.h | 3 |
3 files changed, 57 insertions, 0 deletions
diff --git a/drivers/acpi/pmic/intel_pmic.c b/drivers/acpi/pmic/intel_pmic.c index ca18e0d23df9..471afeea87c2 100644 --- a/drivers/acpi/pmic/intel_pmic.c +++ b/drivers/acpi/pmic/intel_pmic.c @@ -15,6 +15,7 @@ #include <linux/export.h> #include <linux/acpi.h> +#include <linux/mfd/intel_soc_pmic.h> #include <linux/regmap.h> #include <acpi/acpi_lpat.h> #include "intel_pmic.h" @@ -36,6 +37,8 @@ struct intel_pmic_opregion { struct intel_pmic_regs_handler_ctx ctx; }; +static struct intel_pmic_opregion *intel_pmic_opregion; + static int pmic_get_reg_bit(int address, struct pmic_table *table, int count, int *reg, int *bit) { @@ -304,6 +307,7 @@ int intel_pmic_install_opregion_handler(struct device *dev, acpi_handle handle, } opregion->data = d; + intel_pmic_opregion = opregion; return 0; out_remove_thermal_handler: @@ -319,3 +323,51 @@ out_error: return ret; } EXPORT_SYMBOL_GPL(intel_pmic_install_opregion_handler); + +/** + * intel_soc_pmic_exec_mipi_pmic_seq_element - Execute PMIC MIPI sequence + * @i2c_address: I2C client address for the PMIC + * @reg_address: PMIC register address + * @value: New value for the register bits to change + * @mask: Mask indicating which register bits to change + * + * DSI LCD panels describe an initialization sequence in the i915 VBT (Video + * BIOS Tables) using so called MIPI sequences. One possible element in these + * sequences is a PMIC specific element of 15 bytes. + * + * This function executes these PMIC specific elements sending the embedded + * commands to the PMIC. + * + * Return 0 on success, < 0 on failure. + */ +int intel_soc_pmic_exec_mipi_pmic_seq_element(u16 i2c_address, u32 reg_address, + u32 value, u32 mask) +{ + struct intel_pmic_opregion_data *d; + int ret; + + if (!intel_pmic_opregion) { + pr_warn("%s: No PMIC registered\n", __func__); + return -ENXIO; + } + + d = intel_pmic_opregion->data; + + mutex_lock(&intel_pmic_opregion->lock); + + if (d->exec_mipi_pmic_seq_element) { + ret = d->exec_mipi_pmic_seq_element(intel_pmic_opregion->regmap, + i2c_address, reg_address, + value, mask); + } 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", + __func__, i2c_address, reg_address, value, mask); + ret = -EOPNOTSUPP; + } + + mutex_unlock(&intel_pmic_opregion->lock); + + return ret; +} +EXPORT_SYMBOL_GPL(intel_soc_pmic_exec_mipi_pmic_seq_element); diff --git a/drivers/acpi/pmic/intel_pmic.h b/drivers/acpi/pmic/intel_pmic.h index 095afc96952e..5cd195fabca8 100644 --- a/drivers/acpi/pmic/intel_pmic.h +++ b/drivers/acpi/pmic/intel_pmic.h @@ -15,6 +15,8 @@ struct intel_pmic_opregion_data { int (*update_aux)(struct regmap *r, int reg, int raw_temp); int (*get_policy)(struct regmap *r, int reg, int bit, u64 *value); int (*update_policy)(struct regmap *r, int reg, int bit, int enable); + int (*exec_mipi_pmic_seq_element)(struct regmap *r, u16 i2c_address, + u32 reg_address, u32 value, u32 mask); struct pmic_table *power_table; int power_table_count; struct pmic_table *thermal_table; diff --git a/include/linux/mfd/intel_soc_pmic.h b/include/linux/mfd/intel_soc_pmic.h index ed1dfba5e5f9..bfecd6bd4990 100644 --- a/include/linux/mfd/intel_soc_pmic.h +++ b/include/linux/mfd/intel_soc_pmic.h @@ -26,4 +26,7 @@ struct intel_soc_pmic { struct device *dev; }; +int intel_soc_pmic_exec_mipi_pmic_seq_element(u16 i2c_address, u32 reg_address, + u32 value, u32 mask); + #endif /* __INTEL_SOC_PMIC_H__ */ |