[V3] ARM: EXYNOS: Add clocks for EXYNOS I2S and PCM I/F

Commit Message

??? Feb. 8, 2013, 9:05 a.m. UTC

Audio Subsystem has own clocks for I2S0 and PCM0 in all EXYNOS series.
This patch add clocks for I2S0 and PCM0 I/F.

Signed-off-by: Sangsu Park <[e-mail]>
---
 arch/arm/mach-exynos/Makefile      |    1 +
 arch/arm/mach-exynos/clock-audss.c |   68 ++++++++++++++++++++++++++++++++++++
 2 files changed, 69 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/mach-exynos/clock-audss.c

Comments

Kim Kukjin Feb. 13, 2013, 5:29 a.m. UTC | #1

Sangsu Park wrote:
> 
> Audio Subsystem has own clocks for I2S0 and PCM0 in all EXYNOS series.
> This patch add clocks for I2S0 and PCM0 I/F.
> 
> Signed-off-by: Sangsu Park <[e-mail]>
> ---
>  arch/arm/mach-exynos/Makefile      |    1 +
>  arch/arm/mach-exynos/clock-audss.c |   68
> ++++++++++++++++++++++++++++++++++++
>  2 files changed, 69 insertions(+), 0 deletions(-)
>  create mode 100644 arch/arm/mach-exynos/clock-audss.c
> 
> diff --git a/arch/arm/mach-exynos/Makefile b/arch/arm/mach-
> exynos/Makefile
> index 7e53a3a..5b6c7c0 100644
> --- a/arch/arm/mach-exynos/Makefile
> +++ b/arch/arm/mach-exynos/Makefile
> @@ -13,6 +13,7 @@ obj-				:=
>  # Core
> 
>  obj-$(CONFIG_ARCH_EXYNOS)	+= common.o
> +obj-$(CONFIG_ARCH_EXYNOS)	+= clock-audss.o

Sorry for late response.

Basically, this should be implemented with common clock stuff but its
posting was delayed due to some reason :-( I think, you can see the patches
from Thomas P Abraham soon, so please re-work this based on that. If any
updates, let you know.

Thanks.

- Kukjin

Patch

diff --git a/arch/arm/mach-exynos/Makefile b/arch/arm/mach-exynos/Makefile
index 7e53a3a..5b6c7c0 100644
--- a/arch/arm/mach-exynos/Makefile
+++ b/arch/arm/mach-exynos/Makefile
@@ -13,6 +13,7 @@  obj-				:=
 # Core
 
 obj-$(CONFIG_ARCH_EXYNOS)	+= common.o
+obj-$(CONFIG_ARCH_EXYNOS)	+= clock-audss.o
 obj-$(CONFIG_ARCH_EXYNOS4)	+= clock-exynos4.o
 obj-$(CONFIG_CPU_EXYNOS4210)	+= clock-exynos4210.o
 obj-$(CONFIG_SOC_EXYNOS4212)	+= clock-exynos4212.o
diff --git a/arch/arm/mach-exynos/clock-audss.c
b/arch/arm/mach-exynos/clock-audss.c
new file mode 100644
index 0000000..31d01c3
--- /dev/null
+++ b/arch/arm/mach-exynos/clock-audss.c
@@ -0,0 +1,68 @@ 
+/*
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Clock support for EXYNOS Audio Subsystem
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#include <plat/clock.h>
+#include <plat/s5p-clock.h>
+
+#define EXYNOS_PA_AUDSS	(0x03810000)
+
+/* IP Clock Gate 0 Registers */
+#define EXYNOS_AUDSS_CLKGATE_I2SBUS	(1<<2)
+#define EXYNOS_AUDSS_CLKGATE_I2SSPECIAL	(1<<3)
+#define EXYNOS_AUDSS_CLKGATE_PCMBUS	(1<<4)
+#define EXYNOS_AUDSS_CLKGATE_PCMSPECIAL	(1<<5)
+#define EXYNOS_AUDSS_CLKGATE_GPIO	(1<<6)
+
+static void __iomem *clk_audss_base;
+
+static int exynos_clk_audss_ctrl(struct clk *clk, int enable)
+{
+	if (!clk_audss_base)
+		return -ENOMEM;
+
+	return s5p_gatectrl(clk_audss_base, clk, enable);
+}
+
+static struct clk exynos_init_audss_clocks[] = {
+	{
+		.name		= "iis",
+		.devname	= "samsung-i2s.0",
+		.enable		= exynos_clk_audss_ctrl,
+		.ctrlbit	= EXYNOS_AUDSS_CLKGATE_I2SSPECIAL
+				| EXYNOS_AUDSS_CLKGATE_I2SBUS
+				| EXYNOS_AUDSS_CLKGATE_GPIO,
+	}, {
+		.name		= "pcm",
+		.devname	= "samsung-pcm.0",
+		.enable		= exynos_clk_audss_ctrl,
+		.ctrlbit	= EXYNOS_AUDSS_CLKGATE_PCMSPECIAL
+				| EXYNOS_AUDSS_CLKGATE_PCMBUS
+				| EXYNOS_AUDSS_CLKGATE_GPIO,
+	},
+};
+
+void __init exynos_register_audss_clocks(void)
+{
+	clk_audss_base = ioremap(EXYNOS_PA_AUDSS, SZ_4K);
+	if (clk_audss_base == NULL) {
+		pr_err("unable to ioremap for audss base\n");
+		return;
+	}
+
+	s3c_register_clocks(exynos_init_audss_clocks,
+			    ARRAY_SIZE(exynos_init_audss_clocks));
+	s3c_disable_clocks(exynos_init_audss_clocks,
+			   ARRAY_SIZE(exynos_init_audss_clocks));
+}