git.openwrt.org Git - openwrt/staging/xback.git/blob

   1 From 5a1bea2a2572ce5eb4bdcf432a6929681ee381f2 Mon Sep 17 00:00:00 2001
   2 From: Rajendra Nayak <rnayak@codeaurora.org>
   3 Date: Tue, 30 Mar 2021 12:12:41 +0100
   4 Subject: [PATCH] nvmem: qfprom: Add support for fuse blowing on sc7280
   5
   6 Handle the differences across LDO voltage needed for blowing fuses,
   7 and the blow timer value, identified using a minor version of 15
   8 on sc7280.
   9
  10 Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
  11 Signed-off-by: Ravi Kumar Bokka <rbokka@codeaurora.org>
  12 Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
  13 Link: https://lore.kernel.org/r/20210330111241.19401-11-srinivas.kandagatla@linaro.org
  14 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  15 ---
  16  drivers/nvmem/qfprom.c | 27 +++++++++++++++++++++++++--
  17  1 file changed, 25 insertions(+), 2 deletions(-)
  18
  19 --- a/drivers/nvmem/qfprom.c
  20 +++ b/drivers/nvmem/qfprom.c
  21 @@ -45,11 +45,13 @@ MODULE_PARM_DESC(read_raw_data, "Read ra
  22   * @qfprom_blow_timer_value: The timer value of qfprom when doing efuse blow.
  23   * @qfprom_blow_set_freq:    The frequency required to set when we start the
  24   *                           fuse blowing.
  25 + * @qfprom_blow_uV:          LDO voltage to be set when doing efuse blow
  26   */
  27  struct qfprom_soc_data {
  28         u32 accel_value;
  29         u32 qfprom_blow_timer_value;
  30         u32 qfprom_blow_set_freq;
  31 +       int qfprom_blow_uV;
  32  };
  33
  34  /**
  35 @@ -111,6 +113,15 @@ static const struct qfprom_soc_compatibl
  36         .nkeepout = ARRAY_SIZE(sc7180_qfprom_keepout)
  37  };
  38
  39 +static const struct nvmem_keepout sc7280_qfprom_keepout[] = {
  40 +       {.start = 0x128, .end = 0x148},
  41 +       {.start = 0x238, .end = 0x248}
  42 +};
  43 +
  44 +static const struct qfprom_soc_compatible_data sc7280_qfprom = {
  45 +       .keepout = sc7280_qfprom_keepout,
  46 +       .nkeepout = ARRAY_SIZE(sc7280_qfprom_keepout)
  47 +};
  48  /**
  49   * qfprom_disable_fuse_blowing() - Undo enabling of fuse blowing.
  50   * @priv: Our driver data.
  51 @@ -168,6 +179,7 @@ static int qfprom_enable_fuse_blowing(co
  52                                       struct qfprom_touched_values *old)
  53  {
  54         int ret;
  55 +       int qfprom_blow_uV = priv->soc_data->qfprom_blow_uV;
  56
  57         ret = clk_prepare_enable(priv->secclk);
  58         if (ret) {
  59 @@ -187,9 +199,9 @@ static int qfprom_enable_fuse_blowing(co
  60          * a rail shared do don't specify a max--regulator constraints
  61          * will handle.
  62          */
  63 -       ret = regulator_set_voltage(priv->vcc, 1800000, INT_MAX);
  64 +       ret = regulator_set_voltage(priv->vcc, qfprom_blow_uV, INT_MAX);
  65         if (ret) {
  66 -               dev_err(priv->dev, "Failed to set 1.8 voltage\n");
  67 +               dev_err(priv->dev, "Failed to set %duV\n", qfprom_blow_uV);
  68                 goto err_clk_rate_set;
  69         }
  70
  71 @@ -311,6 +323,14 @@ static const struct qfprom_soc_data qfpr
  72         .accel_value = 0xD10,
  73         .qfprom_blow_timer_value = 25,
  74         .qfprom_blow_set_freq = 4800000,
  75 +       .qfprom_blow_uV = 1800000,
  76 +};
  77 +
  78 +static const struct qfprom_soc_data qfprom_7_15_data = {
  79 +       .accel_value = 0xD08,
  80 +       .qfprom_blow_timer_value = 24,
  81 +       .qfprom_blow_set_freq = 4800000,
  82 +       .qfprom_blow_uV = 1900000,
  83  };
  84
  85  static int qfprom_probe(struct platform_device *pdev)
  86 @@ -379,6 +399,8 @@ static int qfprom_probe(struct platform_
  87
  88                 if (major_version == 7 && minor_version == 8)
  89                         priv->soc_data = &qfprom_7_8_data;
  90 +               if (major_version == 7 && minor_version == 15)
  91 +                       priv->soc_data = &qfprom_7_15_data;
  92
  93                 priv->vcc = devm_regulator_get(&pdev->dev, "vcc");
  94                 if (IS_ERR(priv->vcc))
  95 @@ -405,6 +427,7 @@ static int qfprom_probe(struct platform_
  96  static const struct of_device_id qfprom_of_match[] = {
  97         { .compatible = "qcom,qfprom",},
  98         { .compatible = "qcom,sc7180-qfprom", .data = &sc7180_qfprom},
  99 +       { .compatible = "qcom,sc7280-qfprom", .data = &sc7280_qfprom},
 100         {/* sentinel */},
 101  };
 102  MODULE_DEVICE_TABLE(of, qfprom_of_match);