From mboxrd@z Thu Jan 1 00:00:00 1970 From: b29396@freescale.com (Dong Aisheng) Date: Tue, 22 Nov 2011 23:54:23 +0800 Subject: [PATCH v7 1/3] ARM: mxs: add saif clkmux functions In-Reply-To: References: Message-ID: <1321977265-14959-2-git-send-email-b29396@freescale.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Signed-off-by: Dong Aisheng Acked-by: Marek Vasut Cc: Sascha Hauer Cc: Wolfram Sang Cc: Uwe Kleine-K?nig Cc: Mark Brown Cc: Liam Girdwood --- changes since v5: * remove unneeded parenthesis changes since v4: * remove get_master_id function. Instead, we use master_mode and master_id in platform_data to tell saif driver the correct master id for each saifs. changes since v3: * remove the unneeded locking according to Sascha changes since v2: * This patch is separated from the following patch based on suggestions from Uwe. [PATCH 2/3] ARM: mx28evk: add platform data for saif --- arch/arm/mach-mxs/clock-mx28.c | 29 +++++++++++++++++++++++++++++ arch/arm/mach-mxs/include/mach/common.h | 1 + arch/arm/mach-mxs/include/mach/digctl.h | 21 +++++++++++++++++++++ 3 files changed, 51 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-mxs/clock-mx28.c b/arch/arm/mach-mxs/clock-mx28.c index 7954013..c51fe85 100644 --- a/arch/arm/mach-mxs/clock-mx28.c +++ b/arch/arm/mach-mxs/clock-mx28.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include @@ -29,6 +30,7 @@ #include #include #include +#include #include "regs-clkctrl-mx28.h" @@ -43,6 +45,33 @@ static struct clk emi_clk; static struct clk saif0_clk; static struct clk saif1_clk; static struct clk clk32k_clk; +static DEFINE_SPINLOCK(clkmux_lock); + +/* + * HW_SAIF_CLKMUX_SEL: + * DIRECT(0x0): SAIF0 clock pins selected for SAIF0 input clocks, and SAIF1 + * clock pins selected for SAIF1 input clocks. + * CROSSINPUT(0x1): SAIF1 clock inputs selected for SAIF0 input clocks, and + * SAIF0 clock inputs selected for SAIF1 input clocks. + * EXTMSTR0(0x2): SAIF0 clock pin selected for both SAIF0 and SAIF1 input + * clocks. + * EXTMSTR1(0x3): SAIF1 clock pin selected for both SAIF0 and SAIF1 input + * clocks. + */ +int mxs_saif_clkmux_select(unsigned int clkmux) +{ + if (clkmux > 0x3) + return -EINVAL; + + spin_lock(&clkmux_lock); + __raw_writel(BM_DIGCTL_CTRL_SAIF_CLKMUX, + DIGCTRL_BASE_ADDR + HW_DIGCTL_CTRL + MXS_CLR_ADDR); + __raw_writel(clkmux << BP_DIGCTL_CTRL_SAIF_CLKMUX, + DIGCTRL_BASE_ADDR + HW_DIGCTL_CTRL + MXS_SET_ADDR); + spin_unlock(&clkmux_lock); + + return 0; +} static int _raw_clk_enable(struct clk *clk) { diff --git a/arch/arm/mach-mxs/include/mach/common.h b/arch/arm/mach-mxs/include/mach/common.h index 635bb5d..3bbb94f 100644 --- a/arch/arm/mach-mxs/include/mach/common.h +++ b/arch/arm/mach-mxs/include/mach/common.h @@ -16,6 +16,7 @@ struct clk; extern const u32 *mxs_get_ocotp(void); extern int mxs_reset_block(void __iomem *); extern void mxs_timer_init(struct clk *, int); +extern int mxs_saif_clkmux_select(unsigned int clkmux); extern int mx23_register_gpios(void); extern int mx23_clocks_init(void); diff --git a/arch/arm/mach-mxs/include/mach/digctl.h b/arch/arm/mach-mxs/include/mach/digctl.h new file mode 100644 index 0000000..49a888c --- /dev/null +++ b/arch/arm/mach-mxs/include/mach/digctl.h @@ -0,0 +1,21 @@ +/* + * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __MACH_DIGCTL_H__ +#define __MACH_DIGCTL_H__ + +/* MXS DIGCTL SAIF CLKMUX */ +#define MXS_DIGCTL_SAIF_CLKMUX_DIRECT 0x0 +#define MXS_DIGCTL_SAIF_CLKMUX_CROSSINPUT 0x1 +#define MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR0 0x2 +#define MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR1 0x3 + +#define HW_DIGCTL_CTRL 0x0 +#define BP_DIGCTL_CTRL_SAIF_CLKMUX 10 +#define BM_DIGCTL_CTRL_SAIF_CLKMUX (0x3 << 10) +#endif -- 1.7.0.4