power-domain: Return 0 if ops unimplemented and remove empty functions

In case the ops is not implemented, return 0 in the core right away.
This is better than having multiple copies of functions which just
return 0 in each power domain driver. Drop all those empty functions.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Patrick Delaunay <patrick.delaunay@foss.st.com>
Cc: Simon Glass <sjg@chromium.org>

12 files changed, 4 insertions, 181 deletions

diff --git a/drivers/power/domain/apple-pmgr.c b/drivers/power/domain/apple-pmgr.c
index 4d06e76ff5e..402c5b1fd18 100644
--- a/drivers/power/domain/apple-pmgr.c
+++ b/drivers/power/domain/apple-pmgr.c
@@ -42,16 +42,6 @@ static int apple_reset_of_xlate(struct reset_ctl *reset_ctl,
 	return 0;
 }
 
-static int apple_reset_request(struct reset_ctl *reset_ctl)
-{
-	return 0;
-}
-
-static int apple_reset_free(struct reset_ctl *reset_ctl)
-{
-	return 0;
-}
-
 static int apple_reset_assert(struct reset_ctl *reset_ctl)
 {
 	struct apple_pmgr_priv *priv = dev_get_priv(reset_ctl->dev->parent);
@@ -80,8 +70,6 @@ static int apple_reset_deassert(struct reset_ctl *reset_ctl)
 
 struct reset_ops apple_reset_ops = {
 	.of_xlate = apple_reset_of_xlate,
-	.request = apple_reset_request,
-	.rfree = apple_reset_free,
 	.rst_assert = apple_reset_assert,
 	.rst_deassert = apple_reset_deassert,
 };
@@ -92,16 +80,6 @@ static struct driver apple_reset_driver = {
 	.ops = &apple_reset_ops,
 };
 
-static int apple_pmgr_request(struct power_domain *power_domain)
-{
-	return 0;
-}
-
-static int apple_pmgr_rfree(struct power_domain *power_domain)
-{
-	return 0;
-}
-
 static int apple_pmgr_ps_set(struct power_domain *power_domain, u32 pstate)
 {
 	struct apple_pmgr_priv *priv = dev_get_priv(power_domain->dev);
@@ -121,11 +99,6 @@ static int apple_pmgr_on(struct power_domain *power_domain)
 	return apple_pmgr_ps_set(power_domain, APPLE_PMGR_PS_ACTIVE);
 }
 
-static int apple_pmgr_off(struct power_domain *power_domain)
-{
-	return 0;
-}
-
 static int apple_pmgr_of_xlate(struct power_domain *power_domain,
 			       struct ofnode_phandle_args *args)
 {
@@ -167,10 +140,7 @@ static int apple_pmgr_probe(struct udevice *dev)
 }
 
 struct power_domain_ops apple_pmgr_ops = {
-	.request = apple_pmgr_request,
-	.rfree = apple_pmgr_rfree,
 	.on = apple_pmgr_on,
-	.off = apple_pmgr_off,
 	.of_xlate = apple_pmgr_of_xlate,
 };
 
diff --git a/drivers/power/domain/bcm6328-power-domain.c b/drivers/power/domain/bcm6328-power-domain.c
index 6e720e0798c..80144dd9772 100644
--- a/drivers/power/domain/bcm6328-power-domain.c
+++ b/drivers/power/domain/bcm6328-power-domain.c
@@ -24,11 +24,6 @@ static int bcm6328_power_domain_request(struct power_domain *power_domain)
 	return 0;
 }
 
-static int bcm6328_power_domain_free(struct power_domain *power_domain)
-{
-	return 0;
-}
-
 static int bcm6328_power_domain_on(struct power_domain *power_domain)
 {
 	struct bcm6328_power_domain *priv = dev_get_priv(power_domain->dev);
@@ -64,7 +59,6 @@ static const struct udevice_id bcm6328_power_domain_ids[] = {
 };
 
 struct power_domain_ops bcm6328_power_domain_ops = {
-	.rfree = bcm6328_power_domain_free,
 	.off = bcm6328_power_domain_off,
 	.on = bcm6328_power_domain_on,
 	.request = bcm6328_power_domain_request,
diff --git a/drivers/power/domain/imx8-power-domain-legacy.c b/drivers/power/domain/imx8-power-domain-legacy.c
index e2fae2dbc86..bf45891bccd 100644
--- a/drivers/power/domain/imx8-power-domain-legacy.c
+++ b/drivers/power/domain/imx8-power-domain-legacy.c
@@ -84,20 +84,6 @@ int imx8_power_domain_lookup_name(const char *name,
 	return 0;
 }
 
-static int imx8_power_domain_request(struct power_domain *power_domain)
-{
-	debug("%s(power_domain=%p)\n", __func__, power_domain);
-
-	return 0;
-}
-
-static int imx8_power_domain_free(struct power_domain *power_domain)
-{
-	debug("%s(power_domain=%p)\n", __func__, power_domain);
-
-	return 0;
-}
-
 static int imx8_power_domain_on(struct power_domain *power_domain)
 {
 	struct udevice *dev = power_domain->dev;
@@ -364,8 +350,6 @@ static const struct udevice_id imx8_power_domain_ids[] = {
 };
 
 struct power_domain_ops imx8_power_domain_ops = {
-	.request = imx8_power_domain_request,
-	.rfree = imx8_power_domain_free,
 	.on = imx8_power_domain_on,
 	.off = imx8_power_domain_off,
 	.of_xlate = imx8_power_domain_of_xlate,
diff --git a/drivers/power/domain/imx8-power-domain.c b/drivers/power/domain/imx8-power-domain.c
index 6461ab23d62..17b5d57b19b 100644
--- a/drivers/power/domain/imx8-power-domain.c
+++ b/drivers/power/domain/imx8-power-domain.c
@@ -12,20 +12,6 @@
 #include <asm/arch/power-domain.h>
 #include <asm/arch/sci/sci.h>
 
-static int imx8_power_domain_request(struct power_domain *power_domain)
-{
-	debug("%s(power_domain=%p)\n", __func__, power_domain);
-
-	return 0;
-}
-
-static int imx8_power_domain_free(struct power_domain *power_domain)
-{
-	debug("%s(power_domain=%p)\n", __func__, power_domain);
-
-	return 0;
-}
-
 static int imx8_power_domain_on(struct power_domain *power_domain)
 {
 	u32 resource_id = power_domain->id;
@@ -60,13 +46,6 @@ static int imx8_power_domain_off(struct power_domain *power_domain)
 	return 0;
 }
 
-static int imx8_power_domain_probe(struct udevice *dev)
-{
-	debug("%s(dev=%s)\n", __func__, dev->name);
-
-	return 0;
-}
-
 static const struct udevice_id imx8_power_domain_ids[] = {
 	{ .compatible = "fsl,imx8qxp-scu-pd" },
 	{ .compatible = "fsl,scu-pd" },
@@ -74,8 +53,6 @@ static const struct udevice_id imx8_power_domain_ids[] = {
 };
 
 struct power_domain_ops imx8_power_domain_ops_v2 = {
-	.request = imx8_power_domain_request,
-	.rfree = imx8_power_domain_free,
 	.on = imx8_power_domain_on,
 	.off = imx8_power_domain_off,
 };
@@ -84,6 +61,5 @@ U_BOOT_DRIVER(imx8_power_domain_v2) = {
 	.name = "imx8_power_domain_v2",
 	.id = UCLASS_POWER_DOMAIN,
 	.of_match = imx8_power_domain_ids,
-	.probe = imx8_power_domain_probe,
 	.ops = &imx8_power_domain_ops_v2,
 };
diff --git a/drivers/power/domain/imx8m-power-domain.c b/drivers/power/domain/imx8m-power-domain.c
index 5d34bc12902..6082ee6ff8c 100644
--- a/drivers/power/domain/imx8m-power-domain.c
+++ b/drivers/power/domain/imx8m-power-domain.c
@@ -18,16 +18,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-static int imx8m_power_domain_request(struct power_domain *power_domain)
-{
-	return 0;
-}
-
-static int imx8m_power_domain_free(struct power_domain *power_domain)
-{
-	return 0;
-}
-
 static int imx8m_power_domain_on(struct power_domain *power_domain)
 {
 	struct udevice *dev = power_domain->dev;
@@ -100,11 +90,6 @@ static int imx8m_power_domain_bind(struct udevice *dev)
 	return 0;
 }
 
-static int imx8m_power_domain_probe(struct udevice *dev)
-{
-	return 0;
-}
-
 static int imx8m_power_domain_of_to_plat(struct udevice *dev)
 {
 	struct imx8m_power_domain_plat *pdata = dev_get_plat(dev);
@@ -126,8 +111,6 @@ static const struct udevice_id imx8m_power_domain_ids[] = {
 };
 
 struct power_domain_ops imx8m_power_domain_ops = {
-	.request = imx8m_power_domain_request,
-	.rfree = imx8m_power_domain_free,
 	.on = imx8m_power_domain_on,
 	.off = imx8m_power_domain_off,
 	.of_xlate = imx8m_power_domain_of_xlate,
@@ -138,7 +121,6 @@ U_BOOT_DRIVER(imx8m_power_domain) = {
 	.id = UCLASS_POWER_DOMAIN,
 	.of_match = imx8m_power_domain_ids,
 	.bind = imx8m_power_domain_bind,
-	.probe = imx8m_power_domain_probe,
 	.of_to_plat = imx8m_power_domain_of_to_plat,
 	.plat_auto	= sizeof(struct imx8m_power_domain_plat),
 	.ops = &imx8m_power_domain_ops,
diff --git a/drivers/power/domain/meson-ee-pwrc.c b/drivers/power/domain/meson-ee-pwrc.c
index a4d50e701ae..676fded8080 100644
--- a/drivers/power/domain/meson-ee-pwrc.c
+++ b/drivers/power/domain/meson-ee-pwrc.c
@@ -273,16 +273,6 @@ static bool pwrc_ee_get_power(struct power_domain *power_domain)
 	return (reg & pwrc_domain->top_pd->sleep_mask);
 }
 
-static int meson_ee_pwrc_request(struct power_domain *power_domain)
-{
-	return 0;
-}
-
-static int meson_ee_pwrc_free(struct power_domain *power_domain)
-{
-	return 0;
-}
-
 static int meson_ee_pwrc_off(struct power_domain *power_domain)
 {
 	struct meson_ee_pwrc_priv *priv = dev_get_priv(power_domain->dev);
@@ -387,10 +377,8 @@ static int meson_ee_pwrc_of_xlate(struct power_domain *power_domain,
 }
 
 struct power_domain_ops meson_ee_pwrc_ops = {
-	.rfree = meson_ee_pwrc_free,
 	.off = meson_ee_pwrc_off,
 	.on = meson_ee_pwrc_on,
-	.request = meson_ee_pwrc_request,
 	.of_xlate = meson_ee_pwrc_of_xlate,
 };
 
diff --git a/drivers/power/domain/meson-gx-pwrc-vpu.c b/drivers/power/domain/meson-gx-pwrc-vpu.c
index eb94af2cf83..612660ce89f 100644
--- a/drivers/power/domain/meson-gx-pwrc-vpu.c
+++ b/drivers/power/domain/meson-gx-pwrc-vpu.c
@@ -45,16 +45,6 @@ struct meson_gx_pwrc_vpu_priv {
 	struct clk_bulk clks;
 };
 
-static int meson_pwrc_vpu_request(struct power_domain *power_domain)
-{
-	return 0;
-}
-
-static int meson_pwrc_vpu_free(struct power_domain *power_domain)
-{
-	return 0;
-}
-
 static int meson_gx_pwrc_vpu_on(struct power_domain *power_domain)
 {
 	struct meson_gx_pwrc_vpu_priv *priv = dev_get_priv(power_domain->dev);
@@ -274,10 +264,8 @@ static int meson_pwrc_vpu_of_xlate(struct power_domain *power_domain,
 }
 
 struct power_domain_ops meson_gx_pwrc_vpu_ops = {
-	.rfree = meson_pwrc_vpu_free,
 	.off = meson_pwrc_vpu_off,
 	.on = meson_pwrc_vpu_on,
-	.request = meson_pwrc_vpu_request,
 	.of_xlate = meson_pwrc_vpu_of_xlate,
 };
 
diff --git a/drivers/power/domain/mtk-power-domain.c b/drivers/power/domain/mtk-power-domain.c
index ca2ded00efa..3b84147d481 100644
--- a/drivers/power/domain/mtk-power-domain.c
+++ b/drivers/power/domain/mtk-power-domain.c
@@ -317,11 +317,6 @@ static int scpsys_power_request(struct power_domain *power_domain)
 	return 0;
 }
 
-static int scpsys_power_free(struct power_domain *power_domain)
-{
-	return 0;
-}
-
 static int mtk_power_domain_hook(struct udevice *dev)
 {
 	struct scp_domain *scpd = dev_get_priv(dev);
@@ -399,7 +394,6 @@ static const struct udevice_id mtk_power_domain_ids[] = {
 };
 
 struct power_domain_ops mtk_power_domain_ops = {
-	.rfree = scpsys_power_free,
 	.off = scpsys_power_off,
 	.on = scpsys_power_on,
 	.request = scpsys_power_request,
diff --git a/drivers/power/domain/power-domain-uclass.c b/drivers/power/domain/power-domain-uclass.c
index 33f9206bd09..0c5823ceddf 100644
--- a/drivers/power/domain/power-domain-uclass.c
+++ b/drivers/power/domain/power-domain-uclass.c
@@ -71,7 +71,7 @@ int power_domain_get_by_index(struct udevice *dev,
 		return ret;
 	}
 
-	ret = ops->request(power_domain);
+	ret = ops->request ? ops->request(power_domain) : 0;
 	if (ret) {
 		debug("ops->request() failed: %d\n", ret);
 		return ret;
@@ -91,7 +91,7 @@ int power_domain_free(struct power_domain *power_domain)
 
 	debug("%s(power_domain=%p)\n", __func__, power_domain);
 
-	return ops->rfree(power_domain);
+	return ops->rfree ? ops->rfree(power_domain) : 0;
 }
 
 int power_domain_on(struct power_domain *power_domain)
@@ -100,7 +100,7 @@ int power_domain_on(struct power_domain *power_domain)
 
 	debug("%s(power_domain=%p)\n", __func__, power_domain);
 
-	return ops->on(power_domain);
+	return ops->on ? ops->on(power_domain) : 0;
 }
 
 int power_domain_off(struct power_domain *power_domain)
@@ -109,7 +109,7 @@ int power_domain_off(struct power_domain *power_domain)
 
 	debug("%s(power_domain=%p)\n", __func__, power_domain);
 
-	return ops->off(power_domain);
+	return ops->off ? ops->off(power_domain) : 0;
 }
 
 #if CONFIG_IS_ENABLED(OF_REAL)
diff --git a/drivers/power/domain/tegra186-power-domain.c b/drivers/power/domain/tegra186-power-domain.c
index 707735cf851..46da541b75a 100644
--- a/drivers/power/domain/tegra186-power-domain.c
+++ b/drivers/power/domain/tegra186-power-domain.c
@@ -15,22 +15,6 @@
 #define UPDATE	BIT(0)
 #define ON	BIT(1)
 
-static int tegra186_power_domain_request(struct power_domain *power_domain)
-{
-	debug("%s(power_domain=%p) (dev=%p, id=%lu)\n", __func__,
-	      power_domain, power_domain->dev, power_domain->id);
-
-	return 0;
-}
-
-static int tegra186_power_domain_free(struct power_domain *power_domain)
-{
-	debug("%s(power_domain=%p) (dev=%p, id=%lu)\n", __func__,
-	      power_domain, power_domain->dev, power_domain->id);
-
-	return 0;
-}
-
 static int tegra186_power_domain_common(struct power_domain *power_domain,
 					bool on)
 {
@@ -73,22 +57,12 @@ static int tegra186_power_domain_off(struct power_domain *power_domain)
 }
 
 struct power_domain_ops tegra186_power_domain_ops = {
-	.request = tegra186_power_domain_request,
-	.rfree = tegra186_power_domain_free,
 	.on = tegra186_power_domain_on,
 	.off = tegra186_power_domain_off,
 };
 
-static int tegra186_power_domain_probe(struct udevice *dev)
-{
-	debug("%s(dev=%p)\n", __func__, dev);
-
-	return 0;
-}
-
 U_BOOT_DRIVER(tegra186_power_domain) = {
 	.name = "tegra186_power_domain",
 	.id = UCLASS_POWER_DOMAIN,
-	.probe = tegra186_power_domain_probe,
 	.ops = &tegra186_power_domain_ops,
 };
diff --git a/drivers/power/domain/ti-power-domain.c b/drivers/power/domain/ti-power-domain.c
index 752e76b3996..292fff0dfbf 100644
--- a/drivers/power/domain/ti-power-domain.c
+++ b/drivers/power/domain/ti-power-domain.c
@@ -356,17 +356,6 @@ static int ti_power_domain_of_xlate(struct power_domain *pd,
 
 	return 0;
 }
-
-static int ti_power_domain_request(struct power_domain *pd)
-{
-	return 0;
-}
-
-static int ti_power_domain_free(struct power_domain *pd)
-{
-	return 0;
-}
-
 static const struct udevice_id ti_power_domain_of_match[] = {
 	{ .compatible = "ti,sci-pm-domain" },
 	{ /* sentinel */ }
@@ -376,8 +365,6 @@ static struct power_domain_ops ti_power_domain_ops = {
 	.on = ti_power_domain_on,
 	.off = ti_power_domain_off,
 	.of_xlate = ti_power_domain_of_xlate,
-	.request = ti_power_domain_request,
-	.rfree = ti_power_domain_free,
 };
 
 U_BOOT_DRIVER(ti_pm_domains) = {
diff --git a/drivers/power/domain/ti-sci-power-domain.c b/drivers/power/domain/ti-sci-power-domain.c
index f18e45617a1..0140e5e5217 100644
--- a/drivers/power/domain/ti-sci-power-domain.c
+++ b/drivers/power/domain/ti-sci-power-domain.c
@@ -44,18 +44,6 @@ static int ti_sci_power_domain_probe(struct udevice *dev)
 	return 0;
 }
 
-static int ti_sci_power_domain_request(struct power_domain *pd)
-{
-	debug("%s(pd=%p)\n", __func__, pd);
-	return 0;
-}
-
-static int ti_sci_power_domain_free(struct power_domain *pd)
-{
-	debug("%s(pd=%p)\n", __func__, pd);
-	return 0;
-}
-
 static int ti_sci_power_domain_on(struct power_domain *pd)
 {
 	struct ti_sci_power_domain_data *data = dev_get_priv(pd->dev);
@@ -123,8 +111,6 @@ static const struct udevice_id ti_sci_power_domain_of_match[] = {
 };
 
 static struct power_domain_ops ti_sci_power_domain_ops = {
-	.request = ti_sci_power_domain_request,
-	.rfree = ti_sci_power_domain_free,
 	.on = ti_sci_power_domain_on,
 	.off = ti_sci_power_domain_off,
 	.of_xlate = ti_sci_power_domain_of_xlate,