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Message-Id: <1572730039.3.0@crapouillou.net>
Date: Sat, 02 Nov 2019 22:27:19 +0100
From: Paul Cercueil <paul@...pouillou.net>
To: Zhou Yanjie <zhouyanjie@...o.com>
Cc: linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
robh+dt@...nel.org, paul.burton@...s.com, mturquette@...libre.com,
sboyd@...nel.org, mark.rutland@....com
Subject: Re: [PATCH 2/2 v2] clk: Ingenic: Add CGU driver for X1000.
Hi,
Le mer., oct. 23, 2019 at 00:56, Zhou Yanjie <zhouyanjie@...o.com> a
écrit :
> Add support for the clocks provided by the CGU in the Ingenic X1000
> SoC, making use of the cgu code to do the heavy lifting.
>
> Signed-off-by: Zhou Yanjie <zhouyanjie@...o.com>
Acked-by: Paul Cercueil <paul@...pouillou.net>
Cheers,
-Paul
> ---
> drivers/clk/ingenic/Kconfig | 10 ++
> drivers/clk/ingenic/Makefile | 1 +
> drivers/clk/ingenic/x1000-cgu.c | 256
> ++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 267 insertions(+)
> create mode 100644 drivers/clk/ingenic/x1000-cgu.c
>
> diff --git a/drivers/clk/ingenic/Kconfig b/drivers/clk/ingenic/Kconfig
> index fe8db93..2aebf0d 100644
> --- a/drivers/clk/ingenic/Kconfig
> +++ b/drivers/clk/ingenic/Kconfig
> @@ -45,4 +45,14 @@ config INGENIC_CGU_JZ4780
>
> If building for a JZ4780 SoC, you want to say Y here.
>
> +config INGENIC_CGU_X1000
> + bool "Ingenic X1000 CGU driver"
> + default MACH_X1000
> + select INGENIC_CGU_COMMON
> + help
> + Support the clocks provided by the CGU hardware on Ingenic X1000
> + and compatible SoCs.
> +
> + If building for a X1000 SoC, you want to say Y here.
> +
> endmenu
> diff --git a/drivers/clk/ingenic/Makefile
> b/drivers/clk/ingenic/Makefile
> index 250570a..0f0e784 100644
> --- a/drivers/clk/ingenic/Makefile
> +++ b/drivers/clk/ingenic/Makefile
> @@ -4,3 +4,4 @@ obj-$(CONFIG_INGENIC_CGU_JZ4740) += jz4740-cgu.o
> obj-$(CONFIG_INGENIC_CGU_JZ4725B) += jz4725b-cgu.o
> obj-$(CONFIG_INGENIC_CGU_JZ4770) += jz4770-cgu.o
> obj-$(CONFIG_INGENIC_CGU_JZ4780) += jz4780-cgu.o
> +obj-$(CONFIG_INGENIC_CGU_X1000) += x1000-cgu.o
> diff --git a/drivers/clk/ingenic/x1000-cgu.c
> b/drivers/clk/ingenic/x1000-cgu.c
> new file mode 100644
> index 00000000..a964911
> --- /dev/null
> +++ b/drivers/clk/ingenic/x1000-cgu.c
> @@ -0,0 +1,256 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * X1000 SoC CGU driver
> + * Copyright (c) 2019 Zhou Yanjie <zhouyanjie@...o.com>
> + */
> +
> +#include <linux/clk-provider.h>
> +#include <linux/delay.h>
> +#include <linux/of.h>
> +#include <dt-bindings/clock/x1000-cgu.h>
> +#include "cgu.h"
> +#include "pm.h"
> +
> +/* CGU register offsets */
> +#define CGU_REG_CPCCR 0x00
> +#define CGU_REG_APLL 0x10
> +#define CGU_REG_MPLL 0x14
> +#define CGU_REG_CLKGR 0x20
> +#define CGU_REG_OPCR 0x24
> +#define CGU_REG_DDRCDR 0x2c
> +#define CGU_REG_MACPHYCDR 0x54
> +#define CGU_REG_I2SCDR 0x60
> +#define CGU_REG_LPCDR 0x64
> +#define CGU_REG_MSC0CDR 0x68
> +#define CGU_REG_I2SCDR1 0x70
> +#define CGU_REG_SSICDR 0x74
> +#define CGU_REG_CIMCDR 0x7c
> +#define CGU_REG_PCMCDR 0x84
> +#define CGU_REG_MSC1CDR 0xa4
> +#define CGU_REG_CMP_INTR 0xb0
> +#define CGU_REG_CMP_INTRE 0xb4
> +#define CGU_REG_DRCG 0xd0
> +#define CGU_REG_CLOCKSTATUS 0xd4
> +#define CGU_REG_PCMCDR1 0xe0
> +#define CGU_REG_MACPHYC 0xe8
> +
> +/* bits within the OPCR register */
> +#define OPCR_SPENDN0 BIT(7)
> +#define OPCR_SPENDN1 BIT(6)
> +
> +static struct ingenic_cgu *cgu;
> +
> +static const s8 pll_od_encoding[8] = {
> + 0x0, 0x1, -1, 0x2, -1, -1, -1, 0x3,
> +};
> +
> +static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = {
> +
> + /* External clocks */
> +
> + [X1000_CLK_EXCLK] = { "ext", CGU_CLK_EXT },
> + [X1000_CLK_RTCLK] = { "rtc", CGU_CLK_EXT },
> +
> + /* PLLs */
> +
> + [X1000_CLK_APLL] = {
> + "apll", CGU_CLK_PLL,
> + .parents = { X1000_CLK_EXCLK, -1, -1, -1 },
> + .pll = {
> + .reg = CGU_REG_APLL,
> + .m_shift = 24,
> + .m_bits = 7,
> + .m_offset = 1,
> + .n_shift = 18,
> + .n_bits = 5,
> + .n_offset = 1,
> + .od_shift = 16,
> + .od_bits = 2,
> + .od_max = 8,
> + .od_encoding = pll_od_encoding,
> + .bypass_bit = 9,
> + .enable_bit = 8,
> + .stable_bit = 10,
> + },
> + },
> +
> + [X1000_CLK_MPLL] = {
> + "mpll", CGU_CLK_PLL,
> + .parents = { X1000_CLK_EXCLK, -1, -1, -1 },
> + .pll = {
> + .reg = CGU_REG_MPLL,
> + .m_shift = 24,
> + .m_bits = 7,
> + .m_offset = 1,
> + .n_shift = 18,
> + .n_bits = 5,
> + .n_offset = 1,
> + .od_shift = 16,
> + .od_bits = 2,
> + .od_max = 8,
> + .od_encoding = pll_od_encoding,
> + .bypass_bit = 6,
> + .enable_bit = 7,
> + .stable_bit = 0,
> + },
> + },
> +
> + /* Muxes & dividers */
> +
> + [X1000_CLK_SCLKA] = {
> + "sclk_a", CGU_CLK_MUX,
> + .parents = { -1, X1000_CLK_EXCLK, X1000_CLK_APLL, -1 },
> + .mux = { CGU_REG_CPCCR, 30, 2 },
> + },
> +
> + [X1000_CLK_CPUMUX] = {
> + "cpu_mux", CGU_CLK_MUX,
> + .parents = { -1, X1000_CLK_SCLKA, X1000_CLK_MPLL, -1 },
> + .mux = { CGU_REG_CPCCR, 28, 2 },
> + },
> +
> + [X1000_CLK_CPU] = {
> + "cpu", CGU_CLK_DIV,
> + .parents = { X1000_CLK_CPUMUX, -1, -1, -1 },
> + .div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 },
> + },
> +
> + [X1000_CLK_L2CACHE] = {
> + "l2cache", CGU_CLK_DIV,
> + .parents = { X1000_CLK_CPUMUX, -1, -1, -1 },
> + .div = { CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1 },
> + },
> +
> + [X1000_CLK_AHB0] = {
> + "ahb0", CGU_CLK_MUX | CGU_CLK_DIV,
> + .parents = { -1, X1000_CLK_SCLKA, X1000_CLK_MPLL, -1 },
> + .mux = { CGU_REG_CPCCR, 26, 2 },
> + .div = { CGU_REG_CPCCR, 8, 1, 4, 21, -1, -1 },
> + },
> +
> + [X1000_CLK_AHB2PMUX] = {
> + "ahb2_apb_mux", CGU_CLK_MUX,
> + .parents = { -1, X1000_CLK_SCLKA, X1000_CLK_MPLL, -1 },
> + .mux = { CGU_REG_CPCCR, 24, 2 },
> + },
> +
> + [X1000_CLK_AHB2] = {
> + "ahb2", CGU_CLK_DIV,
> + .parents = { X1000_CLK_AHB2PMUX, -1, -1, -1 },
> + .div = { CGU_REG_CPCCR, 12, 1, 4, 20, -1, -1 },
> + },
> +
> + [X1000_CLK_PCLK] = {
> + "pclk", CGU_CLK_DIV,
> + .parents = { X1000_CLK_AHB2PMUX, -1, -1, -1 },
> + .div = { CGU_REG_CPCCR, 16, 1, 4, 20, -1, -1 },
> + },
> +
> + [X1000_CLK_DDR] = {
> + "ddr", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
> + .parents = { -1, X1000_CLK_SCLKA, X1000_CLK_MPLL, -1 },
> + .mux = { CGU_REG_DDRCDR, 30, 2 },
> + .div = { CGU_REG_DDRCDR, 0, 1, 4, 29, 28, 27 },
> + .gate = { CGU_REG_CLKGR, 31 },
> + },
> +
> + [X1000_CLK_MAC] = {
> + "mac", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
> + .parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL},
> + .mux = { CGU_REG_MACPHYCDR, 31, 1 },
> + .div = { CGU_REG_DDRCDR, 0, 1, 8, 29, 28, 27 },
> + .gate = { CGU_REG_CLKGR, 25 },
> + },
> +
> + [X1000_CLK_MSCMUX] = {
> + "msc_mux", CGU_CLK_MUX,
> + .parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL},
> + .mux = { CGU_REG_MSC0CDR, 31, 1 },
> + },
> +
> + [X1000_CLK_MSC0] = {
> + "msc0", CGU_CLK_DIV | CGU_CLK_GATE,
> + .parents = { X1000_CLK_MSCMUX, -1, -1, -1 },
> + .div = { CGU_REG_MSC0CDR, 0, 2, 8, 29, 28, 27 },
> + .gate = { CGU_REG_CLKGR, 4 },
> + },
> +
> + [X1000_CLK_MSC1] = {
> + "msc1", CGU_CLK_DIV | CGU_CLK_GATE,
> + .parents = { X1000_CLK_MSCMUX, -1, -1, -1 },
> + .div = { CGU_REG_MSC1CDR, 0, 2, 8, 29, 28, 27 },
> + .gate = { CGU_REG_CLKGR, 5 },
> + },
> +
> + [X1000_CLK_SSIPLL] = {
> + "ssi_pll", CGU_CLK_MUX | CGU_CLK_DIV,
> + .parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL, -1, -1 },
> + .mux = { CGU_REG_SSICDR, 31, 1 },
> + .div = { CGU_REG_SSICDR, 0, 1, 8, 29, 28, 27 },
> + },
> +
> + [X1000_CLK_SSIMUX] = {
> + "ssi_mux", CGU_CLK_MUX,
> + .parents = { X1000_CLK_EXCLK, X1000_CLK_SSIPLL, -1, -1 },
> + .mux = { CGU_REG_SSICDR, 30, 1 },
> + },
> +
> + /* Gate-only clocks */
> +
> + [X1000_CLK_SFC] = {
> + "sfc", CGU_CLK_GATE,
> + .parents = { X1000_CLK_SSIPLL, -1, -1, -1 },
> + .gate = { CGU_REG_CLKGR, 2 },
> + },
> +
> + [X1000_CLK_UART0] = {
> + "uart0", CGU_CLK_GATE,
> + .parents = { X1000_CLK_EXCLK, -1, -1, -1 },
> + .gate = { CGU_REG_CLKGR, 14 },
> + },
> +
> + [X1000_CLK_UART1] = {
> + "uart1", CGU_CLK_GATE,
> + .parents = { X1000_CLK_EXCLK, -1, -1, -1 },
> + .gate = { CGU_REG_CLKGR, 15 },
> + },
> +
> + [X1000_CLK_UART2] = {
> + "uart2", CGU_CLK_GATE,
> + .parents = { X1000_CLK_EXCLK, -1, -1, -1 },
> + .gate = { CGU_REG_CLKGR, 16 },
> + },
> +
> + [X1000_CLK_SSI] = {
> + "ssi", CGU_CLK_GATE,
> + .parents = { X1000_CLK_SSIMUX, -1, -1, -1 },
> + .gate = { CGU_REG_CLKGR, 19 },
> + },
> +
> + [X1000_CLK_PDMA] = {
> + "pdma", CGU_CLK_GATE,
> + .parents = { X1000_CLK_EXCLK, -1, -1, -1 },
> + .gate = { CGU_REG_CLKGR, 21 },
> + },
> +};
> +
> +static void __init x1000_cgu_init(struct device_node *np)
> +{
> + int retval;
> +
> + cgu = ingenic_cgu_new(x1000_cgu_clocks,
> + ARRAY_SIZE(x1000_cgu_clocks), np);
> + if (!cgu) {
> + pr_err("%s: failed to initialise CGU\n", __func__);
> + return;
> + }
> +
> + retval = ingenic_cgu_register_clocks(cgu);
> + if (retval) {
> + pr_err("%s: failed to register CGU Clocks\n", __func__);
> + return;
> + }
> +
> + ingenic_cgu_register_syscore_ops(cgu);
> +}
> +CLK_OF_DECLARE_DRIVER(x1000_cgu, "ingenic,x1000-cgu",
> x1000_cgu_init);
> --
> 2.7.4
>
>
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