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Date: Thu, 23 Jun 2016 17:52:53 -0700
From: Bin Gao <bin.gao@...ux.intel.com>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>,
Aaron Lu <aaron.lu@...el.com>,
Paul Gortmaker <paul.gortmaker@...driver.com>,
linux-acpi@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, ysiyer <yegnesh.s.iyer@...el.com>,
Ajay Thomas <ajay.thomas.david.rajamanickam@...el.com>,
Bin Gao <bin.gao@...el.com>
Subject: [PATCH v4 3/3] acpi/pmic: Add support for PMIC regs operation region
Broxton platform firmware has defined new customized operation regions
called regs for PMIC chip - regs op region is used to handle the
PMIC gpio mainly intended for the TYPE-C VBUS and Orientation.
The intel_gpio_ctx structure is created for the purpose of handling
the PMIC gpio register read and write.
Signed-off-by: Felipe Balbi <felipe.balbi@...ux.intel.com>
Signed-off-by: Chandra Sekhar Anagani <chandra.sekhar.anagani@...el.com>
Signed-off-by: Bin Gao <bin.gao@...el.com>
---
Changes in v4:
- various fixes to address Aaron's comments.
Changes in v3: none
Changes in v2: none
drivers/acpi/pmic/intel_pmic.c | 74 ++++++++++++++++++++++++++++++++++++++++--
drivers/acpi/pmic/intel_pmic.h | 5 +++
2 files changed, 76 insertions(+), 3 deletions(-)
diff --git a/drivers/acpi/pmic/intel_pmic.c b/drivers/acpi/pmic/intel_pmic.c
index 410e96f..e11d1e0 100644
--- a/drivers/acpi/pmic/intel_pmic.c
+++ b/drivers/acpi/pmic/intel_pmic.c
@@ -21,12 +21,14 @@
#define PMIC_POWER_OPREGION_ID 0x8d
#define PMIC_THERMAL_OPREGION_ID 0x8c
+#define PMIC_REGS_OPREGION_ID 0x8f
struct intel_pmic_opregion {
struct mutex lock;
struct acpi_lpat_conversion_table *lpat_table;
struct regmap *regmap;
struct intel_pmic_opregion_data *data;
+ struct pmic_gpio_ctx ctx;
};
static int pmic_get_reg_bit(int address, struct pmic_table *table,
@@ -204,6 +206,56 @@ static acpi_status intel_pmic_thermal_handler(u32 function,
return AE_OK;
}
+static acpi_status intel_pmic_gpio_handler(u32 function,
+ acpi_physical_address address, u32 bits, u64 *value64,
+ void *handler_context, void *region_context)
+{
+ struct intel_pmic_opregion *opregion = region_context;
+ int result;
+
+ switch (address) {
+ case 0:
+ return AE_OK;
+ case 1:
+ opregion->ctx.address |= (*value64 & 0xff) << 8;
+ return AE_OK;
+ case 2:
+ opregion->ctx.address |= *value64 & 0xff;
+ return AE_OK;
+ case 3:
+ opregion->ctx.value = *value64 & 0xff;
+ return AE_OK;
+ case 4:
+ if (*value64) {
+ result = regmap_write(opregion->regmap,
+ opregion->ctx.address,
+ opregion->ctx.value);
+ } else {
+ result = regmap_read(opregion->regmap,
+ opregion->ctx.address,
+ &opregion->ctx.value);
+ if (result == 0)
+ *value64 = opregion->ctx.value;
+ }
+ memset(&opregion->ctx, 0x00, sizeof(opregion->ctx));
+ break;
+ default:
+ pr_err("%s(): Inavlid address %llu, please check the BIOS\n",
+ __func__, address);
+ return AE_ERROR;
+ }
+
+ if (result < 0) {
+ if (result == -EINVAL)
+ return AE_BAD_PARAMETER;
+ else
+ return AE_ERROR;
+ }
+
+ return AE_OK;
+}
+
+
int intel_pmic_install_opregion_handler(struct device *dev, acpi_handle handle,
struct regmap *regmap,
struct intel_pmic_opregion_data *d)
@@ -240,15 +292,31 @@ int intel_pmic_install_opregion_handler(struct device *dev, acpi_handle handle,
intel_pmic_thermal_handler,
NULL, opregion);
if (ACPI_FAILURE(status)) {
- acpi_remove_address_space_handler(handle, PMIC_POWER_OPREGION_ID,
- intel_pmic_power_handler);
ret = -ENODEV;
- goto out_error;
+ goto remove_pmic_power_handler;
+ }
+
+ status = acpi_install_address_space_handler(handle,
+ PMIC_REGS_OPREGION_ID,
+ intel_pmic_gpio_handler,
+ NULL, opregion);
+ if (ACPI_FAILURE(status)) {
+ ret = -ENODEV;
+ goto remove_pmic_thermal_handler;
}
opregion->data = d;
return 0;
+remove_pmic_thermal_handler:
+ acpi_remove_address_space_handler(handle,
+ PMIC_POWER_OPREGION_ID,
+ intel_pmic_thermal_handler);
+remove_pmic_power_handler:
+ acpi_remove_address_space_handler(handle,
+ PMIC_POWER_OPREGION_ID,
+ intel_pmic_power_handler);
+
out_error:
acpi_lpat_free_conversion_table(opregion->lpat_table);
return ret;
diff --git a/drivers/acpi/pmic/intel_pmic.h b/drivers/acpi/pmic/intel_pmic.h
index e8bfa7b..c87c2ef 100644
--- a/drivers/acpi/pmic/intel_pmic.h
+++ b/drivers/acpi/pmic/intel_pmic.h
@@ -7,6 +7,11 @@ struct pmic_table {
int bit; /* control bit for power */
};
+struct pmic_gpio_ctx {
+ u16 address; /* pmic regs address */
+ unsigned int value; /* value to write @regs address */
+};
+
struct intel_pmic_opregion_data {
int (*get_power)(struct regmap *r, int reg, int bit, u64 *value);
int (*update_power)(struct regmap *r, int reg, int bit, bool on);
--
1.9.1
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