On 06/15/2016 01:55 AM, Andy Shevchenko wrote:
This patch enables I2C controllers found on Intel Edison board.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-designware-pcidrv.c | 33 ++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
index 0f1fc48..a51f6e0 100644
--- a/drivers/i2c/busses/i2c-designware-pcidrv.c
+++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
@@ -42,6 +42,7 @@
enum dw_pci_ctl_id_t {
medfield,
+ merrifield,
baytrail,
haswell,
};
@@ -75,6 +76,14 @@ struct dw_pci_controller {
I2C_FUNC_SMBUS_WORD_DATA | \
I2C_FUNC_SMBUS_I2C_BLOCK)
+/* Merrifield HCNT/LCNT/SDA hold time */
+static struct dw_scl_sda_cfg mrfld_config = {
+ .ss_hcnt = 0x2f8,
+ .fs_hcnt = 0x87,
+ .ss_lcnt = 0x37b,
+ .fs_lcnt = 0x10a,
+};
+
/* BayTrail HCNT/LCNT/SDA hold time */
static struct dw_scl_sda_cfg byt_config = {
.ss_hcnt = 0x200,
@@ -110,6 +119,19 @@ static int mfld_setup(struct pci_dev *pdev, struct dw_pci_controller *c)
return -ENODEV;
}
+static int mrfld_setup(struct pci_dev *pdev, struct dw_pci_controller *c)
+{
+ switch (PCI_SLOT(pdev->devfn)) {
+ case 8:
+ c->bus_num = PCI_FUNC(pdev->devfn) + 0 + 1;
+ return 0;
+ case 9:
+ c->bus_num = PCI_FUNC(pdev->devfn) + 4 + 1;
+ return 0;
+ }
+ return -ENODEV;
+}
+
What kind of bus numbers we are expected to see here and what offsets
these magic numbers represent?
--
Jarkko
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