Export the following i2c_piix4 driver functions as a library so that the
AMD ASF driver can utilize these core functionalities from the i2c_piix4
driver:
- piix4_sb800_region_request(): Request access to a specific SMBus region
on the SB800 chipset.
- piix4_sb800_region_release(): Release the previously requested SMBus
region on the SB800 chipset.
- piix4_transaction(): Handle SMBus transactions between the SMBus
controller and connected devices.
- piix4_sb800_port_sel(): Select the appropriate SMBus port on the SB800
chipset.
By making these functions available as a library, enable the AMD ASF
driver to leverage the established mechanisms in the i2c_piix4 driver,
promoting code reuse and consistency across different drivers.
Co-developed-by: Sanket Goswami <Sanket.Goswami@xxxxxxx>
Signed-off-by: Sanket Goswami <Sanket.Goswami@xxxxxxx>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@xxxxxxx>
---
drivers/i2c/busses/i2c-piix4.c | 14 ++++++++------
drivers/i2c/busses/i2c-piix4.h | 5 +++++
2 files changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
index 2c2a466e2f85..174cce254e96 100644
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -153,8 +153,7 @@ struct i2c_piix4_adapdata {
struct sb800_mmio_cfg mmio_cfg;
};
-static int piix4_sb800_region_request(struct device *dev,
- struct sb800_mmio_cfg *mmio_cfg)
+int piix4_sb800_region_request(struct device *dev, struct sb800_mmio_cfg *mmio_cfg)
{
if (mmio_cfg->use_mmio) {
void __iomem *addr;
@@ -192,9 +191,9 @@ static int piix4_sb800_region_request(struct device *dev,
return 0;
}
+EXPORT_SYMBOL_GPL(piix4_sb800_region_request);
-static void piix4_sb800_region_release(struct device *dev,
- struct sb800_mmio_cfg *mmio_cfg)
+void piix4_sb800_region_release(struct device *dev, struct sb800_mmio_cfg *mmio_cfg)
{
if (mmio_cfg->use_mmio) {
iounmap(mmio_cfg->addr);
@@ -205,6 +204,7 @@ static void piix4_sb800_region_release(struct device *dev,
release_region(SB800_PIIX4_SMB_IDX, SB800_PIIX4_SMB_MAP_SIZE);
}
+EXPORT_SYMBOL_GPL(piix4_sb800_region_release);
static bool piix4_sb800_use_mmio(struct pci_dev *PIIX4_dev)
{
@@ -514,7 +514,7 @@ static int piix4_setup_aux(struct pci_dev *PIIX4_dev,
return piix4_smba;
}
-static int piix4_transaction(struct i2c_adapter *piix4_adapter, unsigned short piix4_smba)
+int piix4_transaction(struct i2c_adapter *piix4_adapter, unsigned short piix4_smba)
{
int temp;
int result = 0;
@@ -587,6 +587,7 @@ static int piix4_transaction(struct i2c_adapter *piix4_adapter, unsigned short p
inb_p(SMBHSTDAT1));
return result;
}
+EXPORT_SYMBOL_GPL(piix4_transaction);
/* Return negative errno on error. */
static s32 piix4_access(struct i2c_adapter * adap, u16 addr,
@@ -740,7 +741,7 @@ static void piix4_imc_wakeup(void)
release_region(KERNCZ_IMC_IDX, 2);
}
-static int piix4_sb800_port_sel(u8 port, struct sb800_mmio_cfg *mmio_cfg)
+int piix4_sb800_port_sel(u8 port, struct sb800_mmio_cfg *mmio_cfg)
{
u8 smba_en_lo, val;
@@ -762,6 +763,7 @@ static int piix4_sb800_port_sel(u8 port, struct sb800_mmio_cfg *mmio_cfg)
return (smba_en_lo & piix4_port_mask_sb800);
}
+EXPORT_SYMBOL_GPL(piix4_sb800_port_sel);
/*
* Handles access to multiple SMBus ports on the SB800.
diff --git a/drivers/i2c/busses/i2c-piix4.h b/drivers/i2c/busses/i2c-piix4.h
index c4c20edacb00..9a5faac3eedd 100644
--- a/drivers/i2c/busses/i2c-piix4.h
+++ b/drivers/i2c/busses/i2c-piix4.h
@@ -37,4 +37,9 @@ struct sb800_mmio_cfg {
bool use_mmio;
};
+int piix4_sb800_port_sel(u8 port, struct sb800_mmio_cfg *mmio_cfg);
+int piix4_transaction(struct i2c_adapter *piix4_adapter, unsigned short piix4_smba);
+int piix4_sb800_region_request(struct device *dev, struct sb800_mmio_cfg *mmio_cfg);
+void piix4_sb800_region_release(struct device *dev, struct sb800_mmio_cfg *mmio_cfg);
+
#endif /* I2C_PIIX4_H */
--
2.25.1
