From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Wed, 08 Feb 2017 03:02:35 +0100 (CET) Received: from smtpbg320.qq.com ([14.17.32.29]:55667 "EHLO smtpbg320.qq.com" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S23992903AbdBHCAAuGGF2 (ORCPT ); Wed, 8 Feb 2017 03:00:00 +0100 X-QQ-mid: bizesmtp3t1486519099tyj9qxvx4 Received: from software.domain.org (unknown [222.92.8.142]) by esmtp4.qq.com (ESMTP) with id ; Wed, 08 Feb 2017 09:58:19 +0800 (CST) X-QQ-SSF: 01100000002000F0FH71B00A0000000 X-QQ-FEAT: PML9g4LxpBq3Ln+9NAci1+eTwkfT6gJNpBNMyaWnXzt7Wgw/TM8n9QHHYYEb2 Pl/3ubiwiLNArmi5Fog6gvpG/YWihCoSsFPD9elj5xBd1PqhXVhLfXjSd1tVFpWE52fgjFK mmQMtuUsCrj5npK3CYO1q6KxPXgFMPNYd1cvJ6H3MZxR6vbrhsbYuKEJWmBS/IFjMZ/CT3u jc2KD8us1EvXio1cvWHgDMVGBqjoqE8goRnAS+Q+g4mYYGPvQLXa36Zgge3kyhHHVkPihOR utewLjzFe3wogCS6dzs7J2+IlkIUVnCKvFPIoatN4Kq+q2 X-QQ-GoodBg: 0 From: Binbin Zhou To: Ralf Baechle Cc: John Crispin , "Steven J . Hill" , linux-mips@linux-mips.org, Fuxin Zhang , Zhangjin Wu , Kelvin Cheung , Yang Ling , Binbin Zhou , HuaCai Chen Subject: [PATCH v5 7/8] clk: Loongson: Add Loongson-1A clock support Date: Wed, 8 Feb 2017 09:57:48 +0800 Message-Id: <1486519069-9364-8-git-send-email-zhoubb@lemote.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1486519069-9364-1-git-send-email-zhoubb@lemote.com> References: <1486519069-9364-1-git-send-email-zhoubb@lemote.com> X-QQ-SENDSIZE: 520 Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 56726 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: zhoubb@lemote.com Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips This patch adds clock support to Loongson-1A SoC There is a workaround that Loongson-1A's PLL register is written only, so we just set it with a fixed value. Signed-off-by: Binbin Zhou Signed-off-by: HuaCai Chen --- arch/mips/include/asm/mach-loongson32/regs-clk.h | 30 +++++++++- drivers/clk/loongson1/Makefile | 1 + drivers/clk/loongson1/clk-loongson1a.c | 75 ++++++++++++++++++++++++ 3 files changed, 105 insertions(+), 1 deletion(-) create mode 100644 drivers/clk/loongson1/clk-loongson1a.c diff --git a/arch/mips/include/asm/mach-loongson32/regs-clk.h b/arch/mips/include/asm/mach-loongson32/regs-clk.h index e5e8f11..d8278a4 100644 --- a/arch/mips/include/asm/mach-loongson32/regs-clk.h +++ b/arch/mips/include/asm/mach-loongson32/regs-clk.h @@ -18,7 +18,35 @@ #define LS1X_CLK_PLL_FREQ LS1X_CLK_REG(0x0) #define LS1X_CLK_PLL_DIV LS1X_CLK_REG(0x4) -#if defined(CONFIG_LOONGSON1_LS1B) +#if defined(CONFIG_LOONGSON1_LS1A) +/* write only */ +#define CORE_PLL_CFG 0x1fe78030 +#define CPU_MUL GENMASK(2, 0) +#define CPU_CFG_EN BIT(3) +#define DDR_MUL GENMASK(6, 4) +#define DDR_CFG_EN BIT(7) +#define CPU_CFG_W_EN BIT(11) +#define DDR_CFG_W_EN BIT(15) + +#define VGA_PLL_CFG 0x1fd00410 +#define VGA_M GENMASK(7, 0) +#define VGA_N GENMASK(11, 8) +#define VGA_OD GENMASK(13, 12) +#define VGA_FRAC GENMASK(31, 14) + +#define LCD_PLL_CFG 0x1fd00410 +#define LCD_M GENMASK(7, 0) +#define LCD_N GENMASK(11, 8) +#define LCD_OD GENMASK(13, 12) +#define LCD_FRAC GENMASK(31, 14) + +#define GPU_PLL_CFG 0x1fd00414 +#define GPU_M GENMASK(7, 0) +#define GPU_N GENMASK(11, 8) +#define GPU_OD GENMASK(13, 12) +#define GPU_FRAC GENMASK(31, 14) + +#elif defined(CONFIG_LOONGSON1_LS1B) /* Clock PLL Divisor Register Bits */ #define DIV_DC_EN BIT(31) #define DIV_DC_RST BIT(30) diff --git a/drivers/clk/loongson1/Makefile b/drivers/clk/loongson1/Makefile index b7f6a16..da7b2dd 100644 --- a/drivers/clk/loongson1/Makefile +++ b/drivers/clk/loongson1/Makefile @@ -1,3 +1,4 @@ obj-y += clk.o +obj-$(CONFIG_LOONGSON1_LS1A) += clk-loongson1a.o obj-$(CONFIG_LOONGSON1_LS1B) += clk-loongson1b.o obj-$(CONFIG_LOONGSON1_LS1C) += clk-loongson1c.o diff --git a/drivers/clk/loongson1/clk-loongson1a.c b/drivers/clk/loongson1/clk-loongson1a.c new file mode 100644 index 0000000..263a82c --- /dev/null +++ b/drivers/clk/loongson1/clk-loongson1a.c @@ -0,0 +1,75 @@ +/* + * Copyright (c) 2012-2016 Binbin Zhou + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include +#include +#include +#include + +#include +#include "clk.h" + +#define OSC (33 * 1000000) +#define DIV_APB 2 + +static DEFINE_SPINLOCK(_lock); + +static unsigned long ls1x_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + /* Workaround, loongson-1A pll register is written only */ + return OSC * 8; +} + +static const struct clk_ops ls1x_pll_clk_ops = { + .recalc_rate = ls1x_pll_recalc_rate, +}; + +void __init ls1x_clk_init(void) +{ + struct clk_hw *hw; + + hw = clk_hw_register_fixed_rate(NULL, "osc_clk", NULL, 0, OSC); + clk_hw_register_clkdev(hw, "osc_clk", NULL); + + /* clock from 33 MHz OSC clk */ + hw = clk_hw_register_pll(NULL, "pll_clk", "osc_clk", + &ls1x_pll_clk_ops, 0); + clk_hw_register_clkdev(hw, "pll_clk", NULL); + + /* cpu clk */ + hw = clk_hw_register_fixed_factor(NULL, "cpu_clk", "pll_clk", + 0, 1, 1); + clk_hw_register_clkdev(hw, "cpu_clk", NULL); + + /* dc clk */ + hw = clk_hw_register_fixed_factor(NULL, "ddr_clk", "pll_clk", + 0, 1, 1); + clk_hw_register_clkdev(hw, "ddr_clk", NULL); + + /* ahb clk */ + hw = clk_hw_register_fixed_factor(NULL, "ahb_clk", "pll_clk", + 0, 1, 2); + clk_hw_register_clkdev(hw, "ahb_clk", NULL); + clk_hw_register_clkdev(hw, "ls1x-dma", NULL); + clk_hw_register_clkdev(hw, "stmmaceth", NULL); + + /* clock derived from AHB clk */ + /* APB clk is always half of the AHB clk */ + hw = clk_hw_register_fixed_factor(NULL, "apb_clk", "ahb_clk", + 0, 1, DIV_APB); + clk_hw_register_clkdev(hw, "apb_clk", NULL); + clk_hw_register_clkdev(hw, "ls1x-ac97", NULL); + clk_hw_register_clkdev(hw, "ls1x-i2c", NULL); + clk_hw_register_clkdev(hw, "ls1x-nand", NULL); + clk_hw_register_clkdev(hw, "ls1x-pwmtimer", NULL); + clk_hw_register_clkdev(hw, "ls1x-spi", NULL); + clk_hw_register_clkdev(hw, "ls1x-wdt", NULL); + clk_hw_register_clkdev(hw, "serial8250", NULL); +} -- 2.9.3