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| author | Suneel Garapati <sgarapati@marvell.com> | 2024-04-23 09:46:04 +0200 |
|---|---|---|
| committer | Andi Shyti <andi.shyti@kernel.org> | 2024-05-06 00:56:38 +0200 |
| commit | 114c69f4be3f3a55355b2f1db46a820bb0364457 (patch) | |
| tree | 1771e87edf114494ec53d54a0e036ea6911513b2 /drivers/i2c/busses/i2c-thunderx-pcidrv.c | |
| parent | i2c: cadence: Add RISCV architecture support (diff) | |
| download | linux-114c69f4be3f3a55355b2f1db46a820bb0364457.tar.xz linux-114c69f4be3f3a55355b2f1db46a820bb0364457.zip | |
i2c: thunderx: Clock divisor logic changes
Handle changes to clock divisor logic for OcteonTX2 SoC family using
subsystem ID and using default reference clock source as 100MHz.
Signed-off-by: Suneel Garapati <sgarapati@marvell.com>
Signed-off-by: Piyush Malgujar <pmalgujar@marvell.com>
Acked-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/i2c/busses/i2c-thunderx-pcidrv.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-thunderx-pcidrv.c b/drivers/i2c/busses/i2c-thunderx-pcidrv.c index a77cd86fe75e..755697740038 100644 --- a/drivers/i2c/busses/i2c-thunderx-pcidrv.c +++ b/drivers/i2c/busses/i2c-thunderx-pcidrv.c @@ -28,6 +28,7 @@ #define PCI_DEVICE_ID_THUNDER_TWSI 0xa012 #define SYS_FREQ_DEFAULT 700000000 +#define OTX2_REF_FREQ_DEFAULT 100000000 #define TWSI_INT_ENA_W1C 0x1028 #define TWSI_INT_ENA_W1S 0x1030 @@ -205,6 +206,12 @@ static int thunder_i2c_probe_pci(struct pci_dev *pdev, if (ret) goto error; + /* + * For OcteonTX2 chips, set reference frequency to 100MHz + * as refclk_src in TWSI_MODE register defaults to 100MHz. + */ + if (octeon_i2c_is_otx2(pdev)) + i2c->sys_freq = OTX2_REF_FREQ_DEFAULT; octeon_i2c_set_clock(i2c); i2c->adap = thunderx_i2c_ops; |