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i2c: designware: Switch PCI driver to use i2c_dw_configure_master() 

Since we have available helper to configure master mode, let's use it
in the PCI driver instead of spread open-coded variant.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Andy Shevchenko 2020-04-25 16:44:46 +03:00 committed by Wolfram Sang
parent 3ebe40ed1c
commit 42ab001234
1 changed files with 7 additions and 26 deletions
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33
drivers/i2c/busses/i2c-designware-pcidrv.c
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@ -46,20 +46,14 @@ struct dw_scl_sda_cfg {
struct dw_pci_controller {
u32 bus_num;
u32 bus_cfg;
u32 tx_fifo_depth;
u32 rx_fifo_depth;
u32 clk_khz;
u32 functionality;
u32 flags;
struct dw_scl_sda_cfg *scl_sda_cfg;
int (*setup)(struct pci_dev *pdev, struct dw_pci_controller *c);
};
#define INTEL_MID_STD_CFG (DW_IC_CON_MASTER | \
DW_IC_CON_SLAVE_DISABLE | \
DW_IC_CON_RESTART_EN)
/* Merrifield HCNT/LCNT/SDA hold time */
static struct dw_scl_sda_cfg mrfld_config = {
.ss_hcnt = 0x2f8,
@ -88,10 +82,11 @@ static struct dw_scl_sda_cfg hsw_config = {
static int mfld_setup(struct pci_dev *pdev, struct dw_pci_controller *c)
{
struct dw_i2c_dev *dev = dev_get_drvdata(&pdev->dev);
switch (pdev->device) {
case 0x0817:
c->bus_cfg &= ~DW_IC_CON_SPEED_MASK;
c->bus_cfg |= DW_IC_CON_SPEED_STD;
dev->timings.bus_freq_hz = I2C_MAX_STANDARD_MODE_FREQ;
/* fall through */
case 0x0818:
case 0x0819:
@ -128,53 +123,41 @@ static int mrfld_setup(struct pci_dev *pdev, struct dw_pci_controller *c)
static struct dw_pci_controller dw_pci_controllers[] = {
[medfield] = {
.bus_num = -1,
.bus_cfg = INTEL_MID_STD_CFG | DW_IC_CON_SPEED_FAST,
.tx_fifo_depth = 32,
.rx_fifo_depth = 32,
.functionality = I2C_FUNC_10BIT_ADDR,
.clk_khz = 25000,
.setup = mfld_setup,
},
[merrifield] = {
.bus_num = -1,
.bus_cfg = INTEL_MID_STD_CFG | DW_IC_CON_SPEED_FAST,
.tx_fifo_depth = 64,
.rx_fifo_depth = 64,
.functionality = I2C_FUNC_10BIT_ADDR,
.scl_sda_cfg = &mrfld_config,
.setup = mrfld_setup,
},
[baytrail] = {
.bus_num = -1,
.bus_cfg = INTEL_MID_STD_CFG | DW_IC_CON_SPEED_FAST,
.tx_fifo_depth = 32,
.rx_fifo_depth = 32,
.functionality = I2C_FUNC_10BIT_ADDR,
.scl_sda_cfg = &byt_config,
},
[haswell] = {
.bus_num = -1,
.bus_cfg = INTEL_MID_STD_CFG | DW_IC_CON_SPEED_FAST,
.tx_fifo_depth = 32,
.rx_fifo_depth = 32,
.functionality = I2C_FUNC_10BIT_ADDR,
.scl_sda_cfg = &hsw_config,
},
[cherrytrail] = {
.bus_num = -1,
.bus_cfg = INTEL_MID_STD_CFG | DW_IC_CON_SPEED_FAST,
.tx_fifo_depth = 32,
.rx_fifo_depth = 32,
.functionality = I2C_FUNC_10BIT_ADDR,
.flags = MODEL_CHERRYTRAIL,
.scl_sda_cfg = &byt_config,
},
[elkhartlake] = {
.bus_num = -1,
.bus_cfg = INTEL_MID_STD_CFG | DW_IC_CON_SPEED_FAST,
.tx_fifo_depth = 32,
.rx_fifo_depth = 32,
.functionality = I2C_FUNC_10BIT_ADDR,
.clk_khz = 100000,
},
};
@ -250,14 +233,16 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
if (r < 0)
return r;
dev->clk = NULL;
dev->controller = controller;
dev->get_clk_rate_khz = i2c_dw_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;
dev->irq = pci_irq_vector(pdev, 0);
dev->flags |= controller->flags;
pci_set_drvdata(pdev, dev);
if (controller->setup) {
r = controller->setup(pdev, controller);
if (r) {
@ -266,10 +251,8 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
}
}
dev->functionality = controller->functionality |
DW_IC_DEFAULT_FUNCTIONALITY;
i2c_dw_configure_master(dev);
dev->master_cfg = controller->bus_cfg;
if (controller->scl_sda_cfg) {
cfg = controller->scl_sda_cfg;
dev->ss_hcnt = cfg->ss_hcnt;
@ -279,8 +262,6 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
dev->sda_hold_time = cfg->sda_hold;
}
pci_set_drvdata(pdev, dev);
dev->tx_fifo_depth = controller->tx_fifo_depth;
dev->rx_fifo_depth = controller->rx_fifo_depth;