diff mbox series

[v3,4/4] i2c: thunderx: Adding ioclk support

Message ID 20240206114349.32197-5-pmalgujar@marvell.com
State Superseded
Headers show
Series i2c: thunderx: Marvell thunderx i2c changes | expand

Commit Message

Piyush Malgujar Feb. 6, 2024, 11:43 a.m. UTC 
Adding support to use ioclk as reference clock if sclk not
present to make it SOC agnostic.
In case, it's not defined in dts/acpi table, use 800MHz as
default clock.

Signed-off-by: Piyush Malgujar <pmalgujar@marvell.com>
---
 drivers/i2c/busses/i2c-thunderx-pcidrv.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

Comments

Andi Shyti Feb. 8, 2024, 9:44 p.m. UTC | #1 
Hi Piyush,

On Tue, Feb 06, 2024 at 03:43:49AM -0800, Piyush Malgujar wrote:
> Adding support to use ioclk as reference clock if sclk not
> present to make it SOC agnostic.

Please use the imperative form to describe what you did. Did you
add support or what or "adding support..." what?

Andi
diff mbox series

Patch

diff --git a/drivers/i2c/busses/i2c-thunderx-pcidrv.c b/drivers/i2c/busses/i2c-thunderx-pcidrv.c
index 31f11b77ab663626967c86086a03213876bf4a07..15cf794a776533d1b0dbb08597fc0d9acf791b44 100644
--- a/drivers/i2c/busses/i2c-thunderx-pcidrv.c
+++ b/drivers/i2c/busses/i2c-thunderx-pcidrv.c
@@ -27,7 +27,7 @@ 
 
 #define PCI_DEVICE_ID_THUNDER_TWSI	0xa012
 
-#define SYS_FREQ_DEFAULT		700000000
+#define SYS_FREQ_DEFAULT		800000000
 #define OTX2_REF_FREQ_DEFAULT		100000000
 
 #define TWSI_INT_ENA_W1C		0x1028
@@ -100,7 +100,8 @@  static void thunder_i2c_clock_enable(struct device *dev, struct octeon_i2c *i2c)
 		i2c->sys_freq = clk_get_rate(i2c->clk);
 	} else {
 		/* ACPI */
-		device_property_read_u32(dev, "sclk", &i2c->sys_freq);
+		if (device_property_read_u32(dev, "sclk", &i2c->sys_freq))
+			device_property_read_u32(dev, "ioclk", &i2c->sys_freq);
 	}
 
 skip:
@@ -182,7 +183,6 @@  static int thunder_i2c_probe_pci(struct pci_dev *pdev,
 	if (!i2c->twsi_base)
 		return -EINVAL;
 
-	thunder_i2c_clock_enable(dev, i2c);
 	ret = device_property_read_u32(dev, "clock-frequency", &i2c->twsi_freq);
 	if (ret)
 		i2c->twsi_freq = I2C_MAX_STANDARD_MODE_FREQ;
@@ -196,12 +196,12 @@  static int thunder_i2c_probe_pci(struct pci_dev *pdev,
 
 	ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSIX);
 	if (ret < 0)
-		goto error;
+		return ret;
 
 	ret = devm_request_irq(dev, pci_irq_vector(pdev, 0), octeon_i2c_isr, 0,
 			       DRV_NAME, i2c);
 	if (ret)
-		goto error;
+		return ret;
 
 	ret = octeon_i2c_init_lowlevel(i2c);
 	if (ret)
@@ -213,6 +213,9 @@  static int thunder_i2c_probe_pci(struct pci_dev *pdev,
 	 */
 	if (octeon_i2c_is_otx2(pdev) && IS_LS_FREQ(i2c->twsi_freq))
 		i2c->sys_freq = OTX2_REF_FREQ_DEFAULT;
+	else
+		thunder_i2c_clock_enable(dev, i2c);
+
 	octeon_i2c_set_clock(i2c);
 
 	i2c->adap = thunderx_i2c_ops;
@@ -240,6 +243,8 @@  static int thunder_i2c_probe_pci(struct pci_dev *pdev,
 
 error:
 	thunder_i2c_clock_disable(dev, i2c->clk);
+	if (!IS_LS_FREQ(i2c->twsi_freq))
+		thunder_i2c_clock_disable(dev, i2c->clk);
 	return ret;
 }