[PATCH v2 05/14] i2c: mediatek: add support for optional arb and pmic clock
Christian Marangi
ansuelsmth at gmail.com
Thu Jun 13 13:09:23 CEST 2024
Add support for optional arb and pmic clock for i2c provided in upstream
linux DTSI.
Signed-off-by: Christian Marangi <ansuelsmth at gmail.com>
---
drivers/i2c/mtk_i2c.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/drivers/i2c/mtk_i2c.c b/drivers/i2c/mtk_i2c.c
index 5592fe91817..3450177741a 100644
--- a/drivers/i2c/mtk_i2c.c
+++ b/drivers/i2c/mtk_i2c.c
@@ -221,6 +221,8 @@ struct mtk_i2c_priv {
void __iomem *pdmabase; /* dma base address*/
struct clk clk_main; /* main clock for i2c bus */
struct clk clk_dma; /* DMA clock for i2c via DMA */
+ struct clk clk_arb; /* DMA clock for i2c ARB */
+ struct clk clk_pmic; /* DMA clock for i2c PMIC */
const struct mtk_i2c_soc_data *soc_data; /* Compatible data for different IC */
int op; /* operation mode */
bool zero_len; /* Only transfer slave address, no data */
@@ -255,6 +257,18 @@ static int mtk_i2c_clk_enable(struct mtk_i2c_priv *priv)
if (ret)
return log_msg_ret("enable clk_dma", ret);
+ if (priv->clk_arb.dev) {
+ ret = clk_enable(&priv->clk_arb);
+ if (ret)
+ return log_msg_ret("enable clk_arb", ret);
+ }
+
+ if (priv->clk_pmic.dev) {
+ ret = clk_enable(&priv->clk_pmic);
+ if (ret)
+ return log_msg_ret("enable clk_pmic", ret);
+ }
+
return 0;
}
@@ -262,6 +276,18 @@ static int mtk_i2c_clk_disable(struct mtk_i2c_priv *priv)
{
int ret;
+ if (priv->clk_pmic.dev) {
+ ret = clk_disable(&priv->clk_pmic);
+ if (ret)
+ return log_msg_ret("disable clk_pmic", ret);
+ }
+
+ if (priv->clk_arb.dev) {
+ ret = clk_disable(&priv->clk_arb);
+ if (ret)
+ return log_msg_ret("disable clk_arb", ret);
+ }
+
ret = clk_disable(&priv->clk_dma);
if (ret)
return log_msg_ret("disable clk_dma", ret);
@@ -748,6 +774,10 @@ static int mtk_i2c_of_to_plat(struct udevice *dev)
ret = clk_get_by_index(dev, 1, &priv->clk_dma);
+ /* optional i2c clock */
+ clk_get_by_name(dev, "arb", &priv->clk_arb);
+ clk_get_by_name(dev, "pmic", &priv->clk_pmic);
+
return ret;
}
--
2.43.0
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