linux-kernel - [PATCH] pcmcia: Add support P2CCLK bit enabler for TI PC1520

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Date:	Tue, 18 Dec 2007 18:57:24 +0900
From:	Nobuhiro Iwamatsu <iwamatsu@...auri.org>
To:	linux-pcmcia@...ts.infradead.org
Cc:	iwamatsu@...auri.org, linux-sh@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] pcmcia: Add support P2CCLK bit enabler for TI PC1520

There is a device that doesn't work when P2CCLK's bit of TI PC1520 was disable.
This patch supports P2CCLK bit enabler for TI PC1520.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@...auri.org>
---
 drivers/pcmcia/Kconfig  |    5 +++++
 drivers/pcmcia/ti113x.h |    8 ++++++++
 2 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/drivers/pcmcia/Kconfig b/drivers/pcmcia/Kconfig
index 519b4ff..3d80888 100644
--- a/drivers/pcmcia/Kconfig
+++ b/drivers/pcmcia/Kconfig
@@ -134,6 +134,11 @@ config YENTA_ENE_TUNE
 	bool "Auto-tune EnE bridges for CB cards" if EMBEDDED
 	depends on YENTA_TI && CARDBUS
 
+config YENTA_TI_P2CCLK
+	default n
+	bool "Clock generated by internal oscillator" if EMBEDDED
+	depends on YENTA_TI && CARDBUS
+
 config YENTA_TOSHIBA
 	default y
 	bool "Special initialization for Toshiba ToPIC bridges" if EMBEDDED
diff --git a/drivers/pcmcia/ti113x.h b/drivers/pcmcia/ti113x.h
index d29657b..ea749e8 100644
--- a/drivers/pcmcia/ti113x.h
+++ b/drivers/pcmcia/ti113x.h
@@ -59,6 +59,7 @@
 #define  TI122X_SCR_SER_STEP		0xc0000000
 #define  TI122X_SCR_INTRTIE		0x20000000
 #define  TIXX21_SCR_TIEALL		0x10000000
+#define  TI122X_SCR_P2CCLK		0x08000000
 #define  TI122X_SCR_CBRSVD		0x00400000
 #define  TI122X_SCR_MRBURSTDN		0x00008000
 #define  TI122X_SCR_MRBURSTUP		0x00004000
@@ -822,6 +823,13 @@ static int ti12xx_override(struct yenta_socket *socket)
 		printk(KERN_INFO "Yenta: Enabling burst memory read transactions\n");
 		val |= TI122X_SCR_MRBURSTUP;
 	}
+
+#ifdef CONFIG_YENTA_TI_P2CCLK
+	if ( !(val & TI122X_SCR_P2CCLK)) {
+		printk(KERN_INFO "Yenta: Clock generated by internal oscillator\n");
+		val |= TI122X_SCR_P2CCLK;
+	}
+#endif
 	if (val_orig != val)
 		config_writel(socket, TI113X_SYSTEM_CONTROL, val);
 
-- 
1.5.3.6
--
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