diff options
Diffstat (limited to 'drivers/nvmem/qfprom.c')
| -rw-r--r-- | drivers/nvmem/qfprom.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c index 6cace24dfbf7..d6d3f24685a8 100644 --- a/drivers/nvmem/qfprom.c +++ b/drivers/nvmem/qfprom.c @@ -45,11 +45,13 @@ MODULE_PARM_DESC(read_raw_data, "Read raw instead of corrected data"); * @qfprom_blow_timer_value: The timer value of qfprom when doing efuse blow. * @qfprom_blow_set_freq: The frequency required to set when we start the * fuse blowing. + * @qfprom_blow_uV: LDO voltage to be set when doing efuse blow */ struct qfprom_soc_data { u32 accel_value; u32 qfprom_blow_timer_value; u32 qfprom_blow_set_freq; + int qfprom_blow_uV; }; /** @@ -111,6 +113,15 @@ static const struct qfprom_soc_compatible_data sc7180_qfprom = { .nkeepout = ARRAY_SIZE(sc7180_qfprom_keepout) }; +static const struct nvmem_keepout sc7280_qfprom_keepout[] = { + {.start = 0x128, .end = 0x148}, + {.start = 0x238, .end = 0x248} +}; + +static const struct qfprom_soc_compatible_data sc7280_qfprom = { + .keepout = sc7280_qfprom_keepout, + .nkeepout = ARRAY_SIZE(sc7280_qfprom_keepout) +}; /** * qfprom_disable_fuse_blowing() - Undo enabling of fuse blowing. * @priv: Our driver data. @@ -127,6 +138,16 @@ static void qfprom_disable_fuse_blowing(const struct qfprom_priv *priv, { int ret; + /* + * This may be a shared rail and may be able to run at a lower rate + * when we're not blowing fuses. At the moment, the regulator framework + * applies voltage constraints even on disabled rails, so remove our + * constraints and allow the rail to be adjusted by other users. + */ + ret = regulator_set_voltage(priv->vcc, 0, INT_MAX); + if (ret) + dev_warn(priv->dev, "Failed to set 0 voltage (ignoring)\n"); + ret = regulator_disable(priv->vcc); if (ret) dev_warn(priv->dev, "Failed to disable regulator (ignoring)\n"); @@ -158,6 +179,7 @@ static int qfprom_enable_fuse_blowing(const struct qfprom_priv *priv, struct qfprom_touched_values *old) { int ret; + int qfprom_blow_uV = priv->soc_data->qfprom_blow_uV; ret = clk_prepare_enable(priv->secclk); if (ret) { @@ -172,6 +194,17 @@ static int qfprom_enable_fuse_blowing(const struct qfprom_priv *priv, goto err_clk_prepared; } + /* + * Hardware requires 1.8V min for fuse blowing; this may be + * a rail shared do don't specify a max--regulator constraints + * will handle. + */ + ret = regulator_set_voltage(priv->vcc, qfprom_blow_uV, INT_MAX); + if (ret) { + dev_err(priv->dev, "Failed to set %duV\n", qfprom_blow_uV); + goto err_clk_rate_set; + } + ret = regulator_enable(priv->vcc); if (ret) { dev_err(priv->dev, "Failed to enable regulator\n"); @@ -290,6 +323,14 @@ static const struct qfprom_soc_data qfprom_7_8_data = { .accel_value = 0xD10, .qfprom_blow_timer_value = 25, .qfprom_blow_set_freq = 4800000, + .qfprom_blow_uV = 1800000, +}; + +static const struct qfprom_soc_data qfprom_7_15_data = { + .accel_value = 0xD08, + .qfprom_blow_timer_value = 24, + .qfprom_blow_set_freq = 4800000, + .qfprom_blow_uV = 1900000, }; static int qfprom_probe(struct platform_device *pdev) @@ -358,6 +399,8 @@ static int qfprom_probe(struct platform_device *pdev) if (major_version == 7 && minor_version == 8) priv->soc_data = &qfprom_7_8_data; + if (major_version == 7 && minor_version == 15) + priv->soc_data = &qfprom_7_15_data; priv->vcc = devm_regulator_get(&pdev->dev, "vcc"); if (IS_ERR(priv->vcc)) @@ -384,6 +427,7 @@ static int qfprom_probe(struct platform_device *pdev) static const struct of_device_id qfprom_of_match[] = { { .compatible = "qcom,qfprom",}, { .compatible = "qcom,sc7180-qfprom", .data = &sc7180_qfprom}, + { .compatible = "qcom,sc7280-qfprom", .data = &sc7280_qfprom}, {/* sentinel */}, }; MODULE_DEVICE_TABLE(of, qfprom_of_match); |