[PATCH 10/10] nvmem: qfprom: Add support for fuse blowing on sc7280

From: Srinivas Kandagatla
Date: Tue Mar 30 2021 - 07:14:27 EST


From: Rajendra Nayak <rnayak@xxxxxxxxxxxxxx>

Handle the differences across LDO voltage needed for blowing fuses,
and the blow timer value, identified using a minor version of 15
on sc7280.

Signed-off-by: Rajendra Nayak <rnayak@xxxxxxxxxxxxxx>
Signed-off-by: Ravi Kumar Bokka <rbokka@xxxxxxxxxxxxxx>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
---
drivers/nvmem/qfprom.c | 27 +++++++++++++++++++++++++--
1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c
index 100d69d8f2e1..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.
@@ -168,6 +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) {
@@ -187,9 +199,9 @@ static int qfprom_enable_fuse_blowing(const struct qfprom_priv *priv,
* a rail shared do don't specify a max--regulator constraints
* will handle.
*/
- ret = regulator_set_voltage(priv->vcc, 1800000, INT_MAX);
+ ret = regulator_set_voltage(priv->vcc, qfprom_blow_uV, INT_MAX);
if (ret) {
- dev_err(priv->dev, "Failed to set 1.8 voltage\n");
+ dev_err(priv->dev, "Failed to set %duV\n", qfprom_blow_uV);
goto err_clk_rate_set;
}

@@ -311,6 +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)
@@ -379,6 +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))
@@ -405,6 +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);
--
2.21.0