linux-kernel - [PATCH v4 23/54] clk: mediatek: mt7622: Properly use CLK_IS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20230221115549.360132-24-angelogioacchino.delregno@collabora.com>
Date:   Tue, 21 Feb 2023 12:55:18 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     mturquette@...libre.com
Cc:     sboyd@...nel.org, matthias.bgg@...il.com,
        angelogioacchino.delregno@...labora.com, wenst@...omium.org,
        johnson.wang@...iatek.com, miles.chen@...iatek.com,
        chun-jie.chen@...iatek.com, daniel@...rotopia.org,
        fparent@...libre.com, msp@...libre.com, nfraprado@...labora.com,
        rex-bc.chen@...iatek.com, zhaojh329@...il.com,
        sam.shih@...iatek.com, edward-jw.yang@...iatek.com,
        yangyingliang@...wei.com, granquet@...libre.com,
        pablo.sun@...iatek.com, sean.wang@...iatek.com,
        chen.zhong@...iatek.com, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH v4 23/54] clk: mediatek: mt7622: Properly use CLK_IS_CRITICAL flag

Instead of calling clk_prepare_enable() for clocks that shall stay
enabled, use the CLK_IS_CRITICAL flag, which purpose is exactly that.

Fixes: 2fc0a509e4ee ("clk: mediatek: add clock support for MT7622 SoC")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Reviewed-by: Chen-Yu Tsai <wenst@...omium.org>
---
 drivers/clk/mediatek/clk-mt7622.c | 35 +++++++++++++------------------
 1 file changed, 15 insertions(+), 20 deletions(-)

diff --git a/drivers/clk/mediatek/clk-mt7622.c b/drivers/clk/mediatek/clk-mt7622.c
index 41af8d420bbf..1c0049fbeb69 100644
--- a/drivers/clk/mediatek/clk-mt7622.c
+++ b/drivers/clk/mediatek/clk-mt7622.c
@@ -50,9 +50,9 @@
 		 _pd_reg, _pd_shift, _tuner_reg, _pcw_reg, _pcw_shift,  \
 		 NULL, "clkxtal")
 
-#define GATE_APMIXED(_id, _name, _parent, _shift)			\
-	GATE_MTK(_id, _name, _parent, &apmixed_cg_regs, _shift,		\
-		 &mtk_clk_gate_ops_no_setclr_inv)
+#define GATE_APMIXED_AO(_id, _name, _parent, _shift)			\
+	GATE_MTK_FLAGS(_id, _name, _parent, &apmixed_cg_regs, _shift,	\
+		 &mtk_clk_gate_ops_no_setclr_inv, CLK_IS_CRITICAL)
 
 #define GATE_INFRA(_id, _name, _parent, _shift)				\
 	GATE_MTK(_id, _name, _parent, &infra_cg_regs, _shift, &mtk_clk_gate_ops_setclr)
@@ -66,6 +66,10 @@
 #define GATE_PERI0(_id, _name, _parent, _shift)				\
 	GATE_MTK(_id, _name, _parent, &peri0_cg_regs, _shift, &mtk_clk_gate_ops_setclr)
 
+#define GATE_PERI0_AO(_id, _name, _parent, _shift)			\
+	GATE_MTK_FLAGS(_id, _name, _parent, &peri0_cg_regs, _shift,	\
+		 &mtk_clk_gate_ops_setclr, CLK_IS_CRITICAL)
+
 #define GATE_PERI1(_id, _name, _parent, _shift)				\
 	GATE_MTK(_id, _name, _parent, &peri1_cg_regs, _shift, &mtk_clk_gate_ops_setclr)
 
@@ -315,7 +319,7 @@ static const struct mtk_pll_data plls[] = {
 };
 
 static const struct mtk_gate apmixed_clks[] = {
-	GATE_APMIXED(CLK_APMIXED_MAIN_CORE_EN, "main_core_en", "mainpll", 5),
+	GATE_APMIXED_AO(CLK_APMIXED_MAIN_CORE_EN, "main_core_en", "mainpll", 5),
 };
 
 static const struct mtk_gate infra_clks[] = {
@@ -450,7 +454,7 @@ static const struct mtk_gate peri_clks[] = {
 	GATE_PERI0(CLK_PERI_AP_DMA_PD, "peri_ap_dma_pd", "axi_sel", 12),
 	GATE_PERI0(CLK_PERI_MSDC30_0_PD, "peri_msdc30_0", "msdc30_0_sel", 13),
 	GATE_PERI0(CLK_PERI_MSDC30_1_PD, "peri_msdc30_1", "msdc30_1_sel", 14),
-	GATE_PERI0(CLK_PERI_UART0_PD, "peri_uart0_pd", "axi_sel", 17),
+	GATE_PERI0_AO(CLK_PERI_UART0_PD, "peri_uart0_pd", "axi_sel", 17),
 	GATE_PERI0(CLK_PERI_UART1_PD, "peri_uart1_pd", "axi_sel", 18),
 	GATE_PERI0(CLK_PERI_UART2_PD, "peri_uart2_pd", "axi_sel", 19),
 	GATE_PERI0(CLK_PERI_UART3_PD, "peri_uart3_pd", "axi_sel", 20),
@@ -478,12 +482,12 @@ static struct mtk_composite infra_muxes[] = {
 
 static struct mtk_composite top_muxes[] = {
 	/* CLK_CFG_0 */
-	MUX_GATE(CLK_TOP_AXI_SEL, "axi_sel", axi_parents,
-		 0x040, 0, 3, 7),
-	MUX_GATE(CLK_TOP_MEM_SEL, "mem_sel", mem_parents,
-		 0x040, 8, 1, 15),
-	MUX_GATE(CLK_TOP_DDRPHYCFG_SEL, "ddrphycfg_sel", ddrphycfg_parents,
-		 0x040, 16, 1, 23),
+	MUX_GATE_FLAGS(CLK_TOP_AXI_SEL, "axi_sel", axi_parents,
+		       0x040, 0, 3, 7, CLK_IS_CRITICAL),
+	MUX_GATE_FLAGS(CLK_TOP_MEM_SEL, "mem_sel", mem_parents,
+		       0x040, 8, 1, 15, CLK_IS_CRITICAL),
+	MUX_GATE_FLAGS(CLK_TOP_DDRPHYCFG_SEL, "ddrphycfg_sel", ddrphycfg_parents,
+		       0x040, 16, 1, 23, CLK_IS_CRITICAL),
 	MUX_GATE(CLK_TOP_ETH_SEL, "eth_sel", eth_parents,
 		 0x040, 24, 3, 31),
 
@@ -621,10 +625,6 @@ static int mtk_topckgen_init(struct platform_device *pdev)
 	mtk_clk_register_gates(&pdev->dev, node, top_clks,
 			       ARRAY_SIZE(top_clks), clk_data);
 
-	clk_prepare_enable(clk_data->hws[CLK_TOP_AXI_SEL]->clk);
-	clk_prepare_enable(clk_data->hws[CLK_TOP_MEM_SEL]->clk);
-	clk_prepare_enable(clk_data->hws[CLK_TOP_DDRPHYCFG_SEL]->clk);
-
 	return of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
 }
 
@@ -667,9 +667,6 @@ static int mtk_apmixedsys_init(struct platform_device *pdev)
 	mtk_clk_register_gates(&pdev->dev, node, apmixed_clks,
 			       ARRAY_SIZE(apmixed_clks), clk_data);
 
-	clk_prepare_enable(clk_data->hws[CLK_APMIXED_ARMPLL]->clk);
-	clk_prepare_enable(clk_data->hws[CLK_APMIXED_MAIN_CORE_EN]->clk);
-
 	return of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
 }
 
@@ -697,8 +694,6 @@ static int mtk_pericfg_init(struct platform_device *pdev)
 	if (r)
 		return r;
 
-	clk_prepare_enable(clk_data->hws[CLK_PERI_UART0_PD]->clk);
-
 	mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc[1]);
 
 	return 0;
-- 
2.39.1