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Message-Id: <20220223011606.3282165-4-peng.fan@oss.nxp.com> Date: Wed, 23 Feb 2022 09:16:04 +0800 From: "Peng Fan (OSS)" <peng.fan@....nxp.com> To: sboyd@...nel.org, robh+dt@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de, abel.vesa@....com Cc: kernel@...gutronix.de, festevam@...il.com, linux-imx@....com, linux-clk@...r.kernel.org, devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, Peng Fan <peng.fan@....com> Subject: [PATCH V2 3/5] clk: imx: add i.MX93 composite clk From: Peng Fan <peng.fan@....com> i.MX93 CCM ROOT clock has a mux, gate and divider in one register, here is to combine all these into one composite clk and simplify clk tree. i.MX93 CCM is a new IP compared with i.MX8M, so introduce a new file. Signed-off-by: Peng Fan <peng.fan@....com> --- drivers/clk/imx/Makefile | 1 + drivers/clk/imx/clk-composite-93.c | 93 ++++++++++++++++++++++++++++++ drivers/clk/imx/clk.h | 9 +++ 3 files changed, 103 insertions(+) create mode 100644 drivers/clk/imx/clk-composite-93.c diff --git a/drivers/clk/imx/Makefile b/drivers/clk/imx/Makefile index aa8f5204d7e1..36c04922d789 100644 --- a/drivers/clk/imx/Makefile +++ b/drivers/clk/imx/Makefile @@ -4,6 +4,7 @@ mxc-clk-objs += clk.o mxc-clk-objs += clk-busy.o mxc-clk-objs += clk-composite-7ulp.o mxc-clk-objs += clk-composite-8m.o +mxc-clk-objs += clk-composite-93.o mxc-clk-objs += clk-cpu.o mxc-clk-objs += clk-divider-gate.o mxc-clk-objs += clk-fixup-div.o diff --git a/drivers/clk/imx/clk-composite-93.c b/drivers/clk/imx/clk-composite-93.c new file mode 100644 index 000000000000..b44619aa5ca5 --- /dev/null +++ b/drivers/clk/imx/clk-composite-93.c @@ -0,0 +1,93 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2021 NXP + * + * Peng Fan <peng.fan@....com> + */ + +#include <linux/clk-provider.h> +#include <linux/errno.h> +#include <linux/export.h> +#include <linux/io.h> +#include <linux/slab.h> + +#include "clk.h" + +#define CCM_DIV_SHIFT 0 +#define CCM_DIV_WIDTH 8 +#define CCM_MUX_SHIFT 8 +#define CCM_MUX_MASK 3 +#define CCM_OFF_SHIFT 24 + +#define AUTHEN_OFFSET 0x30 +#define TZ_NS_SHIFT 9 +#define TZ_NS_MASK BIT(9) + +struct clk_hw *imx93_clk_composite_flags(const char *name, const char * const *parent_names, + int num_parents, void __iomem *reg, + unsigned long flags) +{ + struct clk_hw *hw = ERR_PTR(-ENOMEM), *mux_hw; + struct clk_hw *div_hw, *gate_hw; + struct clk_divider *div = NULL; + struct clk_gate *gate = NULL; + struct clk_mux *mux = NULL; + bool clk_ro = false; + + mux = kzalloc(sizeof(*mux), GFP_KERNEL); + if (!mux) + goto fail; + + mux_hw = &mux->hw; + mux->reg = reg; + mux->shift = CCM_MUX_SHIFT; + mux->mask = CCM_MUX_MASK; + mux->lock = &imx_ccm_lock; + + div = kzalloc(sizeof(*div), GFP_KERNEL); + if (!div) + goto fail; + + div_hw = &div->hw; + div->reg = reg; + div->shift = CCM_DIV_SHIFT; + div->width = CCM_DIV_WIDTH; + div->lock = &imx_ccm_lock; + div->flags = CLK_DIVIDER_ROUND_CLOSEST; + + if (!(readl(reg + AUTHEN_OFFSET) & TZ_NS_MASK)) + clk_ro = true; + + if (clk_ro) { + hw = clk_hw_register_composite(NULL, name, parent_names, num_parents, + mux_hw, &clk_mux_ro_ops, div_hw, + &clk_divider_ro_ops, NULL, NULL, flags); + } else { + gate = kzalloc(sizeof(*gate), GFP_KERNEL); + if (!gate) + goto fail; + + gate_hw = &gate->hw; + gate->reg = reg; + gate->bit_idx = CCM_OFF_SHIFT; + gate->lock = &imx_ccm_lock; + gate->flags = CLK_GATE_SET_TO_DISABLE; + + hw = clk_hw_register_composite(NULL, name, parent_names, num_parents, + mux_hw, &clk_mux_ops, div_hw, + &clk_divider_ops, gate_hw, + &clk_gate_ops, flags | CLK_SET_RATE_NO_REPARENT); + } + + if (IS_ERR(hw)) + goto fail; + + return hw; + +fail: + kfree(gate); + kfree(div); + kfree(mux); + return ERR_CAST(hw); +} +EXPORT_SYMBOL_GPL(imx93_clk_composite_flags); diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h index 7d220a01de1f..63eb7c53b123 100644 --- a/drivers/clk/imx/clk.h +++ b/drivers/clk/imx/clk.h @@ -419,6 +419,15 @@ struct clk_hw *__imx8m_clk_hw_composite(const char *name, IMX_COMPOSITE_FW_MANAGED, \ IMX_COMPOSITE_CLK_FLAGS_CRITICAL_GET_RATE_NO_CACHE) +struct clk_hw *imx93_clk_composite_flags(const char *name, + const char * const *parent_names, + int num_parents, + void __iomem *reg, + unsigned long flags); +#define imx93_clk_composite(name, parent_names, num_parents, reg) \ + imx93_clk_composite_flags(name, parent_names, num_parents, reg, \ + CLK_SET_RATE_NO_REPARENT | CLK_OPS_PARENT_ENABLE) + struct clk_hw *imx_clk_hw_divider_gate(const char *name, const char *parent_name, unsigned long flags, void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags, const struct clk_div_table *table, -- 2.25.1
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