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From 94bf61df9201195d6d8ce82e299fb231b31fbaae Mon Sep 17 00:00:00 2001
From: Daniel Golle <daniel@makrotopia.org>
Date: Fri, 26 May 2023 10:29:45 +0100
Subject: [PATCH] i2c: mt65xx: add additional clocks
On MT7981 additional clocks are required when accessing I2C registers.
Add MCK and PCK optional clocks to i2c-mt65xx driver so we don't have
to always have them enabled, but really only if I2C is used.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
drivers/i2c/busses/i2c-mt65xx.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -93,6 +93,8 @@
* @I2C_MT65XX_CLK_DMA: DMA clock for i2c via DMA
* @I2C_MT65XX_CLK_PMIC: PMIC clock for i2c from PMIC
* @I2C_MT65XX_CLK_ARB: Arbitrator clock for i2c
+ * @I2C_MT65XX_CLK_MCK: MCK clock for i2c
+ * @I2C_MT65XX_CLK_PCK: PCK clock for i2c
* @I2C_MT65XX_CLK_MAX: Number of supported clocks
*/
enum i2c_mt65xx_clks {
@@ -100,11 +102,13 @@ enum i2c_mt65xx_clks {
I2C_MT65XX_CLK_DMA,
I2C_MT65XX_CLK_PMIC,
I2C_MT65XX_CLK_ARB,
+ I2C_MT65XX_CLK_MCK,
+ I2C_MT65XX_CLK_PCK,
I2C_MT65XX_CLK_MAX
};
static const char * const i2c_mt65xx_clk_ids[I2C_MT65XX_CLK_MAX] = {
- "main", "dma", "pmic", "arb"
+ "main", "dma", "pmic", "arb", "mck", "pck"
};
enum DMA_REGS_OFFSET {
@@ -1444,6 +1448,14 @@ static int mtk_i2c_probe(struct platform
if (IS_ERR(i2c->clocks[I2C_MT65XX_CLK_ARB].clk))
return PTR_ERR(i2c->clocks[I2C_MT65XX_CLK_ARB].clk);
+ i2c->clocks[I2C_MT65XX_CLK_MCK].clk = devm_clk_get_optional(&pdev->dev, "mck");
+ if (IS_ERR(i2c->clocks[I2C_MT65XX_CLK_MCK].clk))
+ return PTR_ERR(i2c->clocks[I2C_MT65XX_CLK_MCK].clk);
+
+ i2c->clocks[I2C_MT65XX_CLK_PCK].clk = devm_clk_get_optional(&pdev->dev, "pck");
+ if (IS_ERR(i2c->clocks[I2C_MT65XX_CLK_PCK].clk))
+ return PTR_ERR(i2c->clocks[I2C_MT65XX_CLK_PCK].clk);
+
if (i2c->have_pmic) {
i2c->clocks[I2C_MT65XX_CLK_PMIC].clk = devm_clk_get(&pdev->dev, "pmic");
if (IS_ERR(i2c->clocks[I2C_MT65XX_CLK_PMIC].clk)) {
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