[PATCH v3 06/10] pmdomain: mediatek: Move ctl sequences out of power_on/off functions

[AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>]

In preparation to support power domains of new SoCs and the modem
power domains for both new and already supported chips, move the
generic control power sequences out of the scpsys_power_on() and
scpsys_power_off() and put them in new scpsys_ctl_pwrseq_on(),
scpsys_ctl_pewseq_off() functions.

Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 drivers/pmdomain/mediatek/mtk-pm-domains.c | 57 ++++++++++++++--------
 1 file changed, 38 insertions(+), 19 deletions(-)

diff --git a/drivers/pmdomain/mediatek/mtk-pm-domains.c b/drivers/pmdomain/mediatek/mtk-pm-domains.c
index 6118a389244a..d84f0e7cde12 100644
--- a/drivers/pmdomain/mediatek/mtk-pm-domains.c
+++ b/drivers/pmdomain/mediatek/mtk-pm-domains.c
@@ -244,11 +244,45 @@ static int scpsys_regulator_disable(struct regulator *supply)
 	return supply ? regulator_disable(supply) : 0;
 }
 
+static int scpsys_ctl_pwrseq_on(struct scpsys_domain *pd)
+{
+	struct scpsys *scpsys = pd->scpsys;
+	bool tmp;
+	int ret;
+
+	/* subsys power on */
+	regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_ON_BIT);
+	regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_ON_2ND_BIT);
+
+	/* wait until PWR_ACK = 1 */
+	ret = readx_poll_timeout(scpsys_domain_is_on, pd, tmp, tmp, MTK_POLL_DELAY_US,
+				 MTK_POLL_TIMEOUT);
+	if (ret < 0)
+		return ret;
+
+	regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_CLK_DIS_BIT);
+	regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_ISO_BIT);
+	regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_RST_B_BIT);
+
+	return 0;
+}
+
+static void scpsys_ctl_pwrseq_off(struct scpsys_domain *pd)
+{
+	struct scpsys *scpsys = pd->scpsys;
+
+	/* subsys power off */
+	regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_ISO_BIT);
+	regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_CLK_DIS_BIT);
+	regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_RST_B_BIT);
+	regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_ON_2ND_BIT);
+	regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_ON_BIT);
+}
+
 static int scpsys_power_on(struct generic_pm_domain *genpd)
 {
 	struct scpsys_domain *pd = container_of(genpd, struct scpsys_domain, genpd);
 	struct scpsys *scpsys = pd->scpsys;
-	bool tmp;
 	int ret;
 
 	ret = scpsys_regulator_enable(pd->supply);
@@ -263,20 +297,10 @@ static int scpsys_power_on(struct generic_pm_domain *genpd)
 		regmap_clear_bits(scpsys->base, pd->data->ext_buck_iso_offs,
 				  pd->data->ext_buck_iso_mask);
 
-	/* subsys power on */
-	regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_ON_BIT);
-	regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_ON_2ND_BIT);
-
-	/* wait until PWR_ACK = 1 */
-	ret = readx_poll_timeout(scpsys_domain_is_on, pd, tmp, tmp, MTK_POLL_DELAY_US,
-				 MTK_POLL_TIMEOUT);
-	if (ret < 0)
+	ret = scpsys_ctl_pwrseq_on(pd);
+	if (ret)
 		goto err_pwr_ack;
 
-	regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_CLK_DIS_BIT);
-	regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_ISO_BIT);
-	regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_RST_B_BIT);
-
 	/*
 	 * In few Mediatek platforms(e.g. MT6779), the bus protect policy is
 	 * stricter, which leads to bus protect release must be prior to bus
@@ -342,12 +366,7 @@ static int scpsys_power_off(struct generic_pm_domain *genpd)
 
 	clk_bulk_disable_unprepare(pd->num_subsys_clks, pd->subsys_clks);
 
-	/* subsys power off */
-	regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_ISO_BIT);
-	regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_CLK_DIS_BIT);
-	regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_RST_B_BIT);
-	regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_ON_2ND_BIT);
-	regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_ON_BIT);
+	scpsys_ctl_pwrseq_off(pd);
 
 	/* wait until PWR_ACK = 0 */
 	ret = readx_poll_timeout(scpsys_domain_is_on, pd, tmp, !tmp, MTK_POLL_DELAY_US,
-- 
2.50.1