diff mbox

[3/4,v5a] OMAP: McBSP: Introduce caching in register write operations

Message ID 200912051446.47828.jkrzyszt@tis.icnet.pl (mailing list archive)
State Changes Requested, archived
Delegated to: Tony Lindgren
Headers show

Commit Message

Janusz Krzysztofik Dec. 5, 2009, 1:46 p.m. UTC 
None
diff mbox

Patch

--- git/arch/arm/plat-omap/include/plat/mcbsp.h.orig	2009-11-27 11:53:45.000000000 +0100
+++ git/arch/arm/plat-omap/include/plat/mcbsp.h	2009-12-05 03:37:21.000000000 +0100
@@ -415,6 +415,13 @@  struct omap_mcbsp {
 	u16 max_tx_thres;
 	u16 max_rx_thres;
 #endif
+#if defined(CONFIG_ARCH_OMAP15XX) || defined(CONFIG_ARCH_OMAP16XX) || \
+		defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
+	u16 reg_cache[OMAP_MCBSP_REG_XCERH / sizeof(u16) + 1];
+#elif defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+		defined(CONFIG_ARCH_OMAP4)
+	u32 reg_cache[OMAP_MCBSP_REG_RCCR / sizeof(u32) + 1];
+#endif
 };
 extern struct omap_mcbsp **mcbsp_ptr;
 extern int omap_mcbsp_count;
--- git/arch/arm/plat-omap/mcbsp.c.orig	2009-12-01 03:19:56.000000000 +0100
+++ git/arch/arm/plat-omap/mcbsp.c	2009-12-01 03:37:21.000000000 +0100
@@ -49,7 +49,12 @@  int omap_mcbsp_read(void __iomem *io_bas
 #define MCBSP_READ(mcbsp, reg) \
 		omap_mcbsp_read(mcbsp->io_base, OMAP_MCBSP_REG_##reg)
 #define MCBSP_WRITE(mcbsp, reg, val) \
-		omap_mcbsp_write(mcbsp->io_base, OMAP_MCBSP_REG_##reg, val)
+		omap_mcbsp_write(mcbsp->io_base, OMAP_MCBSP_REG_##reg, \
+		mcbsp->reg_cache[OMAP_MCBSP_REG_##reg / \
+				 sizeof(*mcbsp->reg_cache)] = val)
+#define MCBSP_READ_CACHE(mcbsp, reg) \
+		(mcbsp->reg_cache[OMAP_MCBSP_REG_##reg / \
+				  sizeof(*mcbsp->reg_cache)])
 
 #define omap_mcbsp_check_valid_id(id)	(id < omap_mcbsp_count)
 #define id_to_mcbsp_ptr(id)		mcbsp_ptr[id];