For Apollo Lake we need to take the I2C bus controller out of reset before
using this. Add this functionality to the driver.
Signed-off-by: Simon Glass <s...@chromium.org>
Reviewed-by: Heiko Schocher <h...@denx.de>
---
Changes in v5: None
Changes in v4:
- Drop unrelated change metioned by Heiko
- apollolake -> Apollo Lake
Changes in v3:
- Add a weak function to avoid errors on other platforms
Changes in v2: None
drivers/i2c/designware_i2c_pci.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/i2c/designware_i2c_pci.c b/drivers/i2c/designware_i2c_pci.c
index 2bf90eaa4b..5114883923 100644
--- a/drivers/i2c/designware_i2c_pci.c
+++ b/drivers/i2c/designware_i2c_pci.c
@@ -8,8 +8,14 @@
#include <common.h>
#include <dm.h>
#include <spl.h>
+#include <asm/lpss.h>
#include "designware_i2c.h"
+enum {
+ VANILLA = 0,
+ INTEL_APL,
+};
+
/* BayTrail HCNT/LCNT/SDA hold time */
static struct dw_scl_sda_cfg byt_config = {
.ss_hcnt = 0x200,
@@ -62,6 +68,15 @@ static int designware_i2c_pci_ofdata_to_platdata(struct
udevice *dev)
static int designware_i2c_pci_probe(struct udevice *dev)
{
+ struct dw_i2c *priv = dev_get_priv(dev);
+
+ if (dev_get_driver_data(dev) == INTEL_APL) {
+ /* Ensure controller is in D0 state */
+ lpss_set_power_state(dev, STATE_D0);
+
+ lpss_reset_release(priv->regs);
+ }
+
return designware_i2c_probe(dev);
}
@@ -91,6 +106,7 @@ static int designware_i2c_pci_bind(struct udevice *dev)
static const struct udevice_id designware_i2c_pci_ids[] = {
{ .compatible = "snps,designware-i2c-pci" },
+ { .compatible = "intel,apl-i2c", INTEL_APL },
{ }
};
@@ -116,6 +132,12 @@ static struct pci_device_id designware_pci_supported[] = {
{ PCI_VDEVICE(INTEL, 0x0f45) },
{ PCI_VDEVICE(INTEL, 0x0f46) },
{ PCI_VDEVICE(INTEL, 0x0f47) },
+ { PCI_VDEVICE(INTEL, 0x5aac), .driver_data = INTEL_APL },
+ { PCI_VDEVICE(INTEL, 0x5aae), .driver_data = INTEL_APL },
+ { PCI_VDEVICE(INTEL, 0x5ab0), .driver_data = INTEL_APL },
+ { PCI_VDEVICE(INTEL, 0x5ab2), .driver_data = INTEL_APL },
+ { PCI_VDEVICE(INTEL, 0x5ab4), .driver_data = INTEL_APL },
+ { PCI_VDEVICE(INTEL, 0x5ab6), .driver_data = INTEL_APL },
{},
};
--
2.24.0.432.g9d3f5f5b63-goog
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot
