linux-kernel - [PATCH v4 22/23] clk: mediatek: clk-mt7986-topckgen: Properly keep some clocks enabled

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Message-Id: <20230120092053.182923-23-angelogioacchino.delregno@collabora.com>
Date:   Fri, 20 Jan 2023 10:20:52 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     mturquette@...libre.com
Cc:     sboyd@...nel.org, matthias.bgg@...il.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org,
        angelogioacchino.delregno@...labora.com, wenst@...omium.org,
        johnson.wang@...iatek.com, miles.chen@...iatek.com,
        fparent@...libre.com, chun-jie.chen@...iatek.com,
        sam.shih@...iatek.com, y.oudjana@...tonmail.com,
        nfraprado@...labora.com, rex-bc.chen@...iatek.com,
        ryder.lee@...nel.org, daniel@...rotopia.org,
        jose.exposito89@...il.com, yangyingliang@...wei.com,
        pablo.sun@...iatek.com, msp@...libre.com, weiyi.lu@...iatek.com,
        ikjn@...omium.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        kernel@...labora.com
Subject: [PATCH v4 22/23] clk: mediatek: clk-mt7986-topckgen: Properly keep some clocks enabled

Instead of calling clk_prepare_enable() on a bunch of clocks at probe
time, set the CLK_IS_CRITICAL flag to the same as these are required
to be always on, and this is the right way of achieving that.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Reviewed-by: Chen-Yu Tsai <wenst@...omium.org>
Reviewed-by: Miles Chen <miles.chen@...iatek.com>
---
 drivers/clk/mediatek/clk-mt7986-topckgen.c | 46 +++++++++++-----------
 1 file changed, 24 insertions(+), 22 deletions(-)

diff --git a/drivers/clk/mediatek/clk-mt7986-topckgen.c b/drivers/clk/mediatek/clk-mt7986-topckgen.c
index c9bf47e6098f..36553f0c13fe 100644
--- a/drivers/clk/mediatek/clk-mt7986-topckgen.c
+++ b/drivers/clk/mediatek/clk-mt7986-topckgen.c
@@ -202,16 +202,23 @@ static const struct mtk_mux top_muxes[] = {
 	MUX_GATE_CLR_SET_UPD(CLK_TOP_F_26M_ADC_SEL, "f_26m_adc_sel",
 			     f_26m_adc_parents, 0x020, 0x024, 0x028, 16, 1, 23,
 			     0x1C0, 10),
-	MUX_GATE_CLR_SET_UPD(CLK_TOP_DRAMC_SEL, "dramc_sel", f_26m_adc_parents,
-			     0x020, 0x024, 0x028, 24, 1, 31, 0x1C0, 11),
+	MUX_GATE_CLR_SET_UPD_FLAGS(CLK_TOP_DRAMC_SEL, "dramc_sel",
+				   f_26m_adc_parents, 0x020, 0x024, 0x028,
+				   24, 1, 31, 0x1C0, 11,
+				   CLK_IS_CRITICAL | CLK_SET_RATE_PARENT),
 	/* CLK_CFG_3 */
-	MUX_GATE_CLR_SET_UPD(CLK_TOP_DRAMC_MD32_SEL, "dramc_md32_sel",
-			     dramc_md32_parents, 0x030, 0x034, 0x038, 0, 1, 7,
-			     0x1C0, 12),
-	MUX_GATE_CLR_SET_UPD(CLK_TOP_SYSAXI_SEL, "sysaxi_sel", sysaxi_parents,
-			     0x030, 0x034, 0x038, 8, 2, 15, 0x1C0, 13),
-	MUX_GATE_CLR_SET_UPD(CLK_TOP_SYSAPB_SEL, "sysapb_sel", sysapb_parents,
-			     0x030, 0x034, 0x038, 16, 2, 23, 0x1C0, 14),
+	MUX_GATE_CLR_SET_UPD_FLAGS(CLK_TOP_DRAMC_MD32_SEL, "dramc_md32_sel",
+				   dramc_md32_parents, 0x030, 0x034, 0x038,
+				   0, 1, 7, 0x1C0, 12,
+				   CLK_IS_CRITICAL | CLK_SET_RATE_PARENT),
+	MUX_GATE_CLR_SET_UPD_FLAGS(CLK_TOP_SYSAXI_SEL, "sysaxi_sel",
+				   sysaxi_parents, 0x030, 0x034, 0x038,
+				   8, 2, 15, 0x1C0, 13,
+				   CLK_IS_CRITICAL | CLK_SET_RATE_PARENT),
+	MUX_GATE_CLR_SET_UPD_FLAGS(CLK_TOP_SYSAPB_SEL, "sysapb_sel",
+				   sysapb_parents, 0x030, 0x034, 0x038,
+				   16, 2, 23, 0x1C0, 14,
+				   CLK_IS_CRITICAL | CLK_SET_RATE_PARENT),
 	MUX_GATE_CLR_SET_UPD(CLK_TOP_ARM_DB_MAIN_SEL, "arm_db_main_sel",
 			     arm_db_main_parents, 0x030, 0x034, 0x038, 24, 1,
 			     31, 0x1C0, 15),
@@ -234,9 +241,10 @@ static const struct mtk_mux top_muxes[] = {
 	MUX_GATE_CLR_SET_UPD(CLK_TOP_SGM_325M_SEL, "sgm_325m_sel",
 			     sgm_325m_parents, 0x050, 0x054, 0x058, 8, 1, 15,
 			     0x1C0, 21),
-	MUX_GATE_CLR_SET_UPD(CLK_TOP_SGM_REG_SEL, "sgm_reg_sel",
-			     sgm_reg_parents, 0x050, 0x054, 0x058, 16, 1, 23,
-			     0x1C0, 22),
+	MUX_GATE_CLR_SET_UPD_FLAGS(CLK_TOP_SGM_REG_SEL, "sgm_reg_sel",
+				   sgm_reg_parents, 0x050, 0x054, 0x058,
+				   16, 1, 23, 0x1C0, 22,
+				   CLK_IS_CRITICAL | CLK_SET_RATE_PARENT),
 	MUX_GATE_CLR_SET_UPD(CLK_TOP_A1SYS_SEL, "a1sys_sel", a1sys_parents,
 			     0x050, 0x054, 0x058, 24, 1, 31, 0x1C0, 23),
 	/* CLK_CFG_6 */
@@ -252,9 +260,10 @@ static const struct mtk_mux top_muxes[] = {
 			     f_26m_adc_parents, 0x060, 0x064, 0x068, 24, 1, 31,
 			     0x1C0, 27),
 	/* CLK_CFG_7 */
-	MUX_GATE_CLR_SET_UPD(CLK_TOP_F26M_SEL, "csw_f26m_sel",
-			     f_26m_adc_parents, 0x070, 0x074, 0x078, 0, 1, 7,
-			     0x1C0, 28),
+	MUX_GATE_CLR_SET_UPD_FLAGS(CLK_TOP_F26M_SEL, "csw_f26m_sel",
+				   f_26m_adc_parents, 0x070, 0x074, 0x078,
+				   0, 1, 7, 0x1C0, 28,
+				   CLK_IS_CRITICAL | CLK_SET_RATE_PARENT),
 	MUX_GATE_CLR_SET_UPD(CLK_TOP_AUD_L_SEL, "aud_l_sel", aud_l_parents,
 			     0x070, 0x074, 0x078, 8, 2, 15, 0x1C0, 29),
 	MUX_GATE_CLR_SET_UPD(CLK_TOP_A_TUNER_SEL, "a_tuner_sel",
@@ -307,13 +316,6 @@ static int clk_mt7986_topckgen_probe(struct platform_device *pdev)
 			       ARRAY_SIZE(top_muxes), node,
 			       &mt7986_clk_lock, clk_data);
 
-	clk_prepare_enable(clk_data->hws[CLK_TOP_SYSAXI_SEL]->clk);
-	clk_prepare_enable(clk_data->hws[CLK_TOP_SYSAPB_SEL]->clk);
-	clk_prepare_enable(clk_data->hws[CLK_TOP_DRAMC_SEL]->clk);
-	clk_prepare_enable(clk_data->hws[CLK_TOP_DRAMC_MD32_SEL]->clk);
-	clk_prepare_enable(clk_data->hws[CLK_TOP_F26M_SEL]->clk);
-	clk_prepare_enable(clk_data->hws[CLK_TOP_SGM_REG_SEL]->clk);
-
 	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
 
 	if (r) {
-- 
2.39.0