i2c: mediatek: add support for optional arb and pmic clock
Add support for optional arb and pmic clock for i2c provided in upstream
linux DTSI.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/drivers/i2c/mtk_i2c.c b/drivers/i2c/mtk_i2c.c
index 5592fe9..3450177 100644
--- a/drivers/i2c/mtk_i2c.c
+++ b/drivers/i2c/mtk_i2c.c
@@ -221,6 +221,8 @@
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 @@
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 @@
{
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 @@
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;
}