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Commit 226dfa47 authored by Paul Cercueil's avatar Paul Cercueil Committed by Stephen Boyd
Browse files

clk: Add Ingenic jz4725b CGU driver 



Add support for the clocks provided by the CGU in the Ingenic JZ4725B
SoC.

Signed-off-by: default avatarPaul Cercueil <paul@crapouillou.net>
Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent 2fdecde7

drivers/clk/ingenic/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -14,6 +14,16 @@ config INGENIC_CGU_JZ4740 


	  If building for a JZ4740 SoC, you want to say Y here.



config INGENIC_CGU_JZ4725B

	bool "Ingenic JZ4725B CGU driver"

	default MACH_JZ4725B

	select INGENIC_CGU_COMMON

	help

	  Support the clocks provided by the CGU hardware on Ingenic JZ4725B

	  and compatible SoCs.



	  If building for a JZ4725B SoC, you want to say Y here.



config INGENIC_CGU_JZ4770

	bool "Ingenic JZ4770 CGU driver"

	default MACH_JZ4770

drivers/clk/ingenic/Makefile

+1 −0
Original line number Diff line number Diff line 
obj-$(CONFIG_INGENIC_CGU_COMMON)	+= cgu.o

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

drivers/clk/ingenic/jz4725b-cgu.c

0 → 100644
+225 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

 * Ingenic JZ4725B SoC CGU driver

 *

 * Copyright (C) 2018 Paul Cercueil

 * Author: Paul Cercueil <paul@crapouillou.net>

 */



#include <linux/clk-provider.h>

#include <linux/delay.h>

#include <linux/of.h>

#include <dt-bindings/clock/jz4725b-cgu.h>

#include "cgu.h"



/* CGU register offsets */

#define CGU_REG_CPCCR		0x00

#define CGU_REG_LCR		0x04

#define CGU_REG_CPPCR		0x10

#define CGU_REG_CLKGR		0x20

#define CGU_REG_OPCR		0x24

#define CGU_REG_I2SCDR		0x60

#define CGU_REG_LPCDR		0x64

#define CGU_REG_MSCCDR		0x68

#define CGU_REG_SSICDR		0x74

#define CGU_REG_CIMCDR		0x78



/* bits within the LCR register */

#define LCR_SLEEP		BIT(0)



static struct ingenic_cgu *cgu;



static const s8 pll_od_encoding[4] = {

	0x0, 0x1, -1, 0x3,

};



static const struct ingenic_cgu_clk_info jz4725b_cgu_clocks[] = {



	/* External clocks */



	[JZ4725B_CLK_EXT] = { "ext", CGU_CLK_EXT },

	[JZ4725B_CLK_OSC32K] = { "osc32k", CGU_CLK_EXT },



	[JZ4725B_CLK_PLL] = {

		"pll", CGU_CLK_PLL,

		.parents = { JZ4725B_CLK_EXT, -1, -1, -1 },

		.pll = {

			.reg = CGU_REG_CPPCR,

			.m_shift = 23,

			.m_bits = 9,

			.m_offset = 2,

			.n_shift = 18,

			.n_bits = 5,

			.n_offset = 2,

			.od_shift = 16,

			.od_bits = 2,

			.od_max = 4,

			.od_encoding = pll_od_encoding,

			.stable_bit = 10,

			.bypass_bit = 9,

			.enable_bit = 8,

		},

	},



	/* Muxes & dividers */



	[JZ4725B_CLK_PLL_HALF] = {

		"pll half", CGU_CLK_DIV,

		.parents = { JZ4725B_CLK_PLL, -1, -1, -1 },

		.div = { CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1 },

	},



	[JZ4725B_CLK_CCLK] = {

		"cclk", CGU_CLK_DIV,

		.parents = { JZ4725B_CLK_PLL, -1, -1, -1 },

		.div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 },

	},



	[JZ4725B_CLK_HCLK] = {

		"hclk", CGU_CLK_DIV,

		.parents = { JZ4725B_CLK_PLL, -1, -1, -1 },

		.div = { CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1 },

	},



	[JZ4725B_CLK_PCLK] = {

		"pclk", CGU_CLK_DIV,

		.parents = { JZ4725B_CLK_PLL, -1, -1, -1 },

		.div = { CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1 },

	},



	[JZ4725B_CLK_MCLK] = {

		"mclk", CGU_CLK_DIV,

		.parents = { JZ4725B_CLK_PLL, -1, -1, -1 },

		.div = { CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1 },

	},



	[JZ4725B_CLK_IPU] = {

		"ipu", CGU_CLK_DIV | CGU_CLK_GATE,

		.parents = { JZ4725B_CLK_PLL, -1, -1, -1 },

		.div = { CGU_REG_CPCCR, 16, 1, 4, 22, -1, -1 },

		.gate = { CGU_REG_CLKGR, 13 },

	},



	[JZ4725B_CLK_LCD] = {

		"lcd", CGU_CLK_DIV | CGU_CLK_GATE,

		.parents = { JZ4725B_CLK_PLL_HALF, -1, -1, -1 },

		.div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 },

		.gate = { CGU_REG_CLKGR, 9 },

	},



	[JZ4725B_CLK_I2S] = {

		"i2s", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,

		.parents = { JZ4725B_CLK_EXT, JZ4725B_CLK_PLL_HALF, -1, -1 },

		.mux = { CGU_REG_CPCCR, 31, 1 },

		.div = { CGU_REG_I2SCDR, 0, 1, 9, -1, -1, -1 },

		.gate = { CGU_REG_CLKGR, 6 },

	},



	[JZ4725B_CLK_SPI] = {

		"spi", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,

		.parents = { JZ4725B_CLK_EXT, JZ4725B_CLK_PLL, -1, -1 },

		.mux = { CGU_REG_SSICDR, 31, 1 },

		.div = { CGU_REG_SSICDR, 0, 1, 4, -1, -1, -1 },

		.gate = { CGU_REG_CLKGR, 4 },

	},



	[JZ4725B_CLK_MMC_MUX] = {

		"mmc_mux", CGU_CLK_DIV,

		.parents = { JZ4725B_CLK_PLL_HALF, -1, -1, -1 },

		.div = { CGU_REG_MSCCDR, 0, 1, 5, -1, -1, -1 },

	},



	[JZ4725B_CLK_UDC] = {

		"udc", CGU_CLK_MUX | CGU_CLK_DIV,

		.parents = { JZ4725B_CLK_EXT, JZ4725B_CLK_PLL_HALF, -1, -1 },

		.mux = { CGU_REG_CPCCR, 29, 1 },

		.div = { CGU_REG_CPCCR, 23, 1, 6, -1, -1, -1 },

	},



	/* Gate-only clocks */



	[JZ4725B_CLK_UART] = {

		"uart", CGU_CLK_GATE,

		.parents = { JZ4725B_CLK_EXT, -1, -1, -1 },

		.gate = { CGU_REG_CLKGR, 0 },

	},



	[JZ4725B_CLK_DMA] = {

		"dma", CGU_CLK_GATE,

		.parents = { JZ4725B_CLK_PCLK, -1, -1, -1 },

		.gate = { CGU_REG_CLKGR, 12 },

	},



	[JZ4725B_CLK_ADC] = {

		"adc", CGU_CLK_GATE,

		.parents = { JZ4725B_CLK_EXT, -1, -1, -1 },

		.gate = { CGU_REG_CLKGR, 7 },

	},



	[JZ4725B_CLK_I2C] = {

		"i2c", CGU_CLK_GATE,

		.parents = { JZ4725B_CLK_EXT, -1, -1, -1 },

		.gate = { CGU_REG_CLKGR, 3 },

	},



	[JZ4725B_CLK_AIC] = {

		"aic", CGU_CLK_GATE,

		.parents = { JZ4725B_CLK_EXT, -1, -1, -1 },

		.gate = { CGU_REG_CLKGR, 5 },

	},



	[JZ4725B_CLK_MMC0] = {

		"mmc0", CGU_CLK_GATE,

		.parents = { JZ4725B_CLK_MMC_MUX, -1, -1, -1 },

		.gate = { CGU_REG_CLKGR, 6 },

	},



	[JZ4725B_CLK_MMC1] = {

		"mmc1", CGU_CLK_GATE,

		.parents = { JZ4725B_CLK_MMC_MUX, -1, -1, -1 },

		.gate = { CGU_REG_CLKGR, 16 },

	},



	[JZ4725B_CLK_BCH] = {

		"bch", CGU_CLK_GATE,

		.parents = { JZ4725B_CLK_MCLK/* not sure */, -1, -1, -1 },

		.gate = { CGU_REG_CLKGR, 11 },

	},



	[JZ4725B_CLK_TCU] = {

		"tcu", CGU_CLK_GATE,

		.parents = { JZ4725B_CLK_EXT/* not sure */, -1, -1, -1 },

		.gate = { CGU_REG_CLKGR, 1 },

	},



	[JZ4725B_CLK_EXT512] = {

		"ext/512", CGU_CLK_FIXDIV,

		.parents = { JZ4725B_CLK_EXT },



		/* Doc calls it EXT512, but it seems to be /256... */

		.fixdiv = { 256 },

	},



	[JZ4725B_CLK_RTC] = {

		"rtc", CGU_CLK_MUX,

		.parents = { JZ4725B_CLK_EXT512, JZ4725B_CLK_OSC32K, -1, -1 },

		.mux = { CGU_REG_OPCR, 2, 1},

	},

};



static void __init jz4725b_cgu_init(struct device_node *np)

{

	int retval;



	cgu = ingenic_cgu_new(jz4725b_cgu_clocks,

			      ARRAY_SIZE(jz4725b_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__);

}

CLK_OF_DECLARE(jz4725b_cgu, "ingenic,jz4725b-cgu", jz4725b_cgu_init);