linux-kernel - [PATCH 08/10] clk: imx: add imx8m_clk_hw_composite

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Message-Id: <1584003692-25523-9-git-send-email-peng.fan@nxp.com>
Date:   Thu, 12 Mar 2020 17:01:30 +0800
From:   peng.fan@....com
To:     shawnguo@...nel.org, s.hauer@...gutronix.de,
        leonard.crestez@....com, sboyd@...nel.org, abel.vesa@....com
Cc:     kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Anson.Huang@....com, daniel.baluta@....com, aford173@...il.com,
        ping.bai@....com, jun.li@....com, l.stach@...gutronix.de,
        andrew.smirnov@...il.com, agx@...xcpu.org, angus@...ea.ca,
        heiko@...ech.de, fugang.duan@....com, linux-clk@...r.kernel.org,
        Peng Fan <peng.fan@....com>
Subject: [PATCH 08/10] clk: imx: add imx8m_clk_hw_composite_bus

From: Peng Fan <peng.fan@....com>

Introduce imx8m_clk_hw_composite_bus api for bus clk root slice usage.
Because the mux switch sequence issue, we could not reuse Peripheral
Clock Slice code, need use composite specific mux operation.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/clk/imx/clk-composite-8m.c | 5 +++++
 drivers/clk/imx/clk.h              | 7 +++++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/clk/imx/clk-composite-8m.c b/drivers/clk/imx/clk-composite-8m.c
index fe05b3c4d4fc..086c9ed68bdf 100644
--- a/drivers/clk/imx/clk-composite-8m.c
+++ b/drivers/clk/imx/clk-composite-8m.c
@@ -223,6 +223,11 @@ struct clk_hw *imx8m_clk_hw_composite_flags(const char *name,
 		div->width = PCG_CORE_DIV_WIDTH;
 		divider_ops = &clk_divider_ops;
 		mux_ops = &imx8m_clk_composite_mux_ops;
+	} else if (composite_flags & IMX_COMPOSITE_BUS) {
+		div->shift = PCG_PREDIV_SHIFT;
+		div->width = PCG_PREDIV_WIDTH;
+		divider_ops = &imx8m_clk_composite_divider_ops;
+		mux_ops = &imx8m_clk_composite_mux_ops;
 	} else {
 		div->shift = PCG_PREDIV_SHIFT;
 		div->width = PCG_PREDIV_WIDTH;
diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h
index f074dd8ec42e..d4ea1609bcb7 100644
--- a/drivers/clk/imx/clk.h
+++ b/drivers/clk/imx/clk.h
@@ -478,6 +478,7 @@ struct clk_hw *imx_clk_hw_cpu(const char *name, const char *parent_name,
 		struct clk *step);
 
 #define IMX_COMPOSITE_CORE	BIT(0)
+#define IMX_COMPOSITE_BUS	BIT(1)
 
 struct clk_hw *imx8m_clk_hw_composite_flags(const char *name,
 					    const char * const *parent_names,
@@ -486,6 +487,12 @@ struct clk_hw *imx8m_clk_hw_composite_flags(const char *name,
 					    u32 composite_flags,
 					    unsigned long flags);
 
+#define imx8m_clk_hw_composite_bus(name, parent_names, reg)	\
+	imx8m_clk_hw_composite_flags(name, parent_names, \
+			ARRAY_SIZE(parent_names), reg, \
+			IMX_COMPOSITE_BUS, \
+			CLK_SET_RATE_NO_REPARENT | CLK_OPS_PARENT_ENABLE)
+
 #define imx8m_clk_hw_composite_core(name, parent_names, reg)	\
 	imx8m_clk_hw_composite_flags(name, parent_names, \
 			ARRAY_SIZE(parent_names), reg, \
-- 
2.16.4