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Commit f088ba4e authored by Nicholas Troast's avatar Nicholas Troast
Browse files

msm: qpnp-power-on: add support for configuring SMPL PON trigger 



Add a sysfs node named "smpl_en" to allow configuring the SMPL PON
trigger. This sysfs node takes the values 0 or 1 for disable or enable
respectively.

This example shell command will disable the SMPL PON trigger.
echo 0 > /sys/module/qpnp_power_on/parameters/smpl_en

CRs-Fixed: 957185
Change-Id: I32ebe84ceaac21443b28abea2b4935a96d94c9cd
Signed-off-by: default avatarNicholas Troast <ntroast@codeaurora.org>
parent 1c2c6d7f

drivers/platform/msm/qpnp-power-on.c

+72 −1
Original line number Diff line number Diff line 
/* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.

/* Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -616,6 +616,41 @@ int qpnp_pon_wd_config(bool enable) 
}

EXPORT_SYMBOL(qpnp_pon_wd_config);



static int qpnp_pon_get_trigger_config(enum pon_trigger_source pon_src,

							bool *enabled)

{

	struct qpnp_pon *pon = sys_reset_dev;

	int rc;

	u16 addr;

	u8 val;

	u8 mask;



	if (!pon)

		return -ENODEV;



	if (pon_src < PON_SMPL || pon_src > PON_KPDPWR_N) {

		dev_err(&pon->spmi->dev, "Invalid PON source\n");

		return -EINVAL;

	}



	addr = QPNP_PON_TRIGGER_EN(pon);

	mask = BIT(pon_src);

	if (is_pon_gen2(pon) && pon_src == PON_SMPL) {

		addr = QPNP_PON_SMPL_CTL(pon);

		mask = QPNP_PON_SMPL_EN;

	}



	rc = spmi_ext_register_readl(pon->spmi->ctrl, pon->spmi->sid,

							addr, &val, 1);

	if (rc)

		dev_err(&pon->spmi->dev,

			"Unable to read from addr=%hx, rc(%d)\n",

			addr, rc);

	else

		*enabled = !!(val & mask);



	return rc;

}



/**

 * qpnp_pon_trigger_config - Configures (enable/disable) the PON trigger source
@@ -1671,6 +1706,42 @@ static int pon_regulator_init(struct qpnp_pon *pon) 
	return rc;

}



static bool smpl_en;



static int qpnp_pon_smpl_en_get(char *buf, const struct kernel_param *kp)

{

	bool enabled;

	int rc;



	rc = qpnp_pon_get_trigger_config(PON_SMPL, &enabled);

	if (rc < 0)

		return rc;



	return snprintf(buf, QPNP_PON_BUFFER_SIZE, "%d", enabled);

}



static int qpnp_pon_smpl_en_set(const char *val,

					const struct kernel_param *kp)

{

	int rc;



	rc = param_set_bool(val, kp);

	if (rc < 0) {

		pr_err("Unable to set smpl_en rc=%d\n", rc);

		return rc;

	}



	rc = qpnp_pon_trigger_config(PON_SMPL, *(bool *)kp->arg);

	return rc;

}



static struct kernel_param_ops smpl_en_ops = {

	.set = qpnp_pon_smpl_en_set,

	.get = qpnp_pon_smpl_en_get,

};



module_param_cb(smpl_en, &smpl_en_ops, &smpl_en, 0644);



static bool dload_on_uvlo;



static int qpnp_pon_debugfs_uvlo_dload_get(char *buf,