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i2c: designware: Get rid of PCI driver specifics in common code 

Do not spread PCI specifics over common code. It seems to be a layering
violation which can be easily avoided. Refactor PCI driver and drop
PCI specifics from common code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Andy Shevchenko 2020-05-19 15:50:37 +03:00 committed by Wolfram Sang
parent 7c9ec2c525
commit ab0ef8bac1
2 changed files with 14 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/i2c/busses/i2c-designware-core.h
View File

@ -232,7 +232,6 @@ struct dw_i2c_dev {
struct reset_control *rst;
struct i2c_client *slave;
u32 (*get_clk_rate_khz) (struct dw_i2c_dev *dev);
struct dw_pci_controller *controller;
int cmd_err;
struct i2c_msg *msgs;
int msgs_num;

24
drivers/i2c/busses/i2c-designware-pcidrv.c
View File

@ -48,10 +48,10 @@ struct dw_pci_controller {
u32 bus_num;
u32 tx_fifo_depth;
u32 rx_fifo_depth;
u32 clk_khz;
u32 flags;
struct dw_scl_sda_cfg *scl_sda_cfg;
int (*setup)(struct pci_dev *pdev, struct dw_pci_controller *c);
u32 (*get_clk_rate_khz)(struct dw_i2c_dev *dev);
};
/* Merrifield HCNT/LCNT/SDA hold time */
@ -80,6 +80,11 @@ static struct dw_scl_sda_cfg hsw_config = {
.sda_hold = 0x9,
};
static u32 mfld_get_clk_rate_khz(struct dw_i2c_dev *dev)
{
return 25000;
}
static int mfld_setup(struct pci_dev *pdev, struct dw_pci_controller *c)
{
struct dw_i2c_dev *dev = dev_get_drvdata(&pdev->dev);
@ -120,13 +125,18 @@ static int mrfld_setup(struct pci_dev *pdev, struct dw_pci_controller *c)
return -ENODEV;
}
static u32 ehl_get_clk_rate_khz(struct dw_i2c_dev *dev)
{
return 100000;
}
static struct dw_pci_controller dw_pci_controllers[] = {
[medfield] = {
.bus_num = -1,
.tx_fifo_depth = 32,
.rx_fifo_depth = 32,
.clk_khz = 25000,
.setup = mfld_setup,
.get_clk_rate_khz = mfld_get_clk_rate_khz,
},
[merrifield] = {
.bus_num = -1,
@ -158,7 +168,7 @@ static struct dw_pci_controller dw_pci_controllers[] = {
.bus_num = -1,
.tx_fifo_depth = 32,
.rx_fifo_depth = 32,
.clk_khz = 100000,
.get_clk_rate_khz = ehl_get_clk_rate_khz,
},
};
@ -188,11 +198,6 @@ static int i2c_dw_pci_resume(struct device *dev)
static UNIVERSAL_DEV_PM_OPS(i2c_dw_pm_ops, i2c_dw_pci_suspend,
i2c_dw_pci_resume, NULL);
static u32 i2c_dw_get_clk_rate_khz(struct dw_i2c_dev *dev)
{
return dev->controller->clk_khz;
}
static int i2c_dw_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
@ -233,8 +238,7 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
if (r < 0)
return r;
dev->controller = controller;
dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz;
dev->get_clk_rate_khz = controller->get_clk_rate_khz;
dev->timings.bus_freq_hz = I2C_MAX_FAST_MODE_FREQ;
dev->base = pcim_iomap_table(pdev)[0];
dev->dev = &pdev->dev;