Commit 5a1bea2a authored by Rajendra Nayak's avatar Rajendra Nayak Committed by Greg Kroah-Hartman
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nvmem: qfprom: Add support for fuse blowing on sc7280 



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: default avatarRajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: default avatarRavi Kumar Bokka <rbokka@codeaurora.org>
Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210330111241.19401-11-srinivas.kandagatla@linaro.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b1f20fd0

drivers/nvmem/qfprom.c

+25 −2
Original line number Diff line number Diff line
@@ -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);