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- From 94bf61df9201195d6d8ce82e299fb231b31fbaae Mon Sep 17 00:00:00 2001
- From: Daniel Golle <[email protected]>
- 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 <[email protected]>
- ---
- 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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