Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 4688f385 authored by Sascha Hauer's avatar Sascha Hauer Committed by Matthias Brugger
Browse files

soc: mediatek: SCPSYS: Add regulator support 



The power domains are supplied by regulators. Add support for them so
that the regulators are properly turned on before a domain is powered up
and turned off when a domain is powered down.

Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: default avatarMatthias Brugger <matthias.bgg@gmail.com>
parent 8005c49d

drivers/soc/mediatek/mtk-scpsys.c

+27 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <linux/pm_domain.h>

#include <linux/regmap.h>

#include <linux/soc/mediatek/infracfg.h>

#include <linux/regulator/consumer.h>

#include <dt-bindings/power/mt8173-power.h>



#define SPM_VDE_PWR_CON			0x0210
@@ -179,6 +180,7 @@ struct scp_domain { 
	u32 sram_pdn_ack_bits;

	u32 bus_prot_mask;

	bool active_wakeup;

	struct regulator *supply;

};



struct scp {
@@ -221,6 +223,12 @@ static int scpsys_power_on(struct generic_pm_domain *genpd) 
	int ret;

	int i;



	if (scpd->supply) {

		ret = regulator_enable(scpd->supply);

		if (ret)

			return ret;

	}



	for (i = 0; i < MAX_CLKS && scpd->clk[i]; i++) {

		ret = clk_prepare_enable(scpd->clk[i]);

		if (ret) {
@@ -299,6 +307,9 @@ static int scpsys_power_on(struct generic_pm_domain *genpd) 
			clk_disable_unprepare(scpd->clk[i]);

	}

err_clk:

	if (scpd->supply)

		regulator_disable(scpd->supply);



	dev_err(scp->dev, "Failed to power on domain %s\n", genpd->name);



	return ret;
@@ -379,6 +390,9 @@ static int scpsys_power_off(struct generic_pm_domain *genpd) 
	for (i = 0; i < MAX_CLKS && scpd->clk[i]; i++)

		clk_disable_unprepare(scpd->clk[i]);



	if (scpd->supply)

		regulator_disable(scpd->supply);



	return 0;



out:
@@ -448,6 +462,19 @@ static int __init scpsys_probe(struct platform_device *pdev) 
		return PTR_ERR(scp->infracfg);

	}



	for (i = 0; i < NUM_DOMAINS; i++) {

		struct scp_domain *scpd = &scp->domains[i];

		const struct scp_domain_data *data = &scp_domain_data[i];



		scpd->supply = devm_regulator_get_optional(&pdev->dev, data->name);

		if (IS_ERR(scpd->supply)) {

			if (PTR_ERR(scpd->supply) == -ENODEV)

				scpd->supply = NULL;

			else

				return PTR_ERR(scpd->supply);

		}

	}



	pd_data->num_domains = NUM_DOMAINS;



	for (i = 0; i < NUM_DOMAINS; i++) {