target/linux/mediatek/patches-5.15/855-pending-i2c-mt65xx-add-additional-clocks.patch

   1 From 94bf61df9201195d6d8ce82e299fb231b31fbaae Mon Sep 17 00:00:00 2001
   2 From: Daniel Golle <daniel@makrotopia.org>
   3 Date: Fri, 26 May 2023 10:29:45 +0100
   4 Subject: [PATCH] i2c: mt65xx: add additional clocks
   5
   6 On MT7981 additional clocks are required when accessing I2C registers.
   7 Add MCK and PCK optional clocks to i2c-mt65xx driver so we don't have
   8 to always have them enabled, but really only if I2C is used.
   9
  10 Signed-off-by: Daniel Golle <daniel@makrotopia.org>
  11 ---
  12  drivers/i2c/busses/i2c-mt65xx.c | 14 +++++++++++++-
  13  1 file changed, 13 insertions(+), 1 deletion(-)
  14
  15 --- a/drivers/i2c/busses/i2c-mt65xx.c
  16 +++ b/drivers/i2c/busses/i2c-mt65xx.c
  17 @@ -93,6 +93,8 @@
  18   * @I2C_MT65XX_CLK_DMA:  DMA clock for i2c via DMA
  19   * @I2C_MT65XX_CLK_PMIC: PMIC clock for i2c from PMIC
  20   * @I2C_MT65XX_CLK_ARB:  Arbitrator clock for i2c
  21 + * @I2C_MT65XX_CLK_MCK:  MCK clock for i2c
  22 + * @I2C_MT65XX_CLK_PCK:  PCK clock for i2c
  23   * @I2C_MT65XX_CLK_MAX:  Number of supported clocks
  24   */
  25  enum i2c_mt65xx_clks {
  26 @@ -100,11 +102,13 @@ enum i2c_mt65xx_clks {
  27         I2C_MT65XX_CLK_DMA,
  28         I2C_MT65XX_CLK_PMIC,
  29         I2C_MT65XX_CLK_ARB,
  30 +       I2C_MT65XX_CLK_MCK,
  31 +       I2C_MT65XX_CLK_PCK,
  32         I2C_MT65XX_CLK_MAX
  33  };
  34
  35  static const char * const i2c_mt65xx_clk_ids[I2C_MT65XX_CLK_MAX] = {
  36 -       "main", "dma", "pmic", "arb"
  37 +       "main", "dma", "pmic", "arb", "mck", "pck"
  38  };
  39
  40  enum DMA_REGS_OFFSET {
  41 @@ -1444,6 +1448,14 @@ static int mtk_i2c_probe(struct platform
  42         if (IS_ERR(i2c->clocks[I2C_MT65XX_CLK_ARB].clk))
  43                 return PTR_ERR(i2c->clocks[I2C_MT65XX_CLK_ARB].clk);
  44
  45 +       i2c->clocks[I2C_MT65XX_CLK_MCK].clk = devm_clk_get_optional(&pdev->dev, "mck");
  46 +       if (IS_ERR(i2c->clocks[I2C_MT65XX_CLK_MCK].clk))
  47 +               return PTR_ERR(i2c->clocks[I2C_MT65XX_CLK_MCK].clk);
  48 +
  49 +       i2c->clocks[I2C_MT65XX_CLK_PCK].clk = devm_clk_get_optional(&pdev->dev, "pck");
  50 +       if (IS_ERR(i2c->clocks[I2C_MT65XX_CLK_PCK].clk))
  51 +               return PTR_ERR(i2c->clocks[I2C_MT65XX_CLK_PCK].clk);
  52 +
  53         if (i2c->have_pmic) {
  54                 i2c->clocks[I2C_MT65XX_CLK_PMIC].clk = devm_clk_get(&pdev->dev, "pmic");
  55                 if (IS_ERR(i2c->clocks[I2C_MT65XX_CLK_PMIC].clk)) {