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authorPatil, Rachna <rachna@ti.com>2012-01-22 23:47:01 +0000
committerHeiko Schocher <hs@denx.de>2012-01-23 11:57:31 +0100
commitb4116ede36da628a517a94d6cba9dba4a02104a4 (patch)
tree3f38815b07fed2a404115186ba60f61a45d940d3 /arch
parent498cbdfe62a8330f6c89765bdd15e60328a26511 (diff)
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ARM: AM33XX: Add i2c support
Add i2c driver board hookup for AM335X EVM Signed-off-by: Chandan Nath <chandan.nath@ti.com> Signed-off-by: Patil, Rachna <rachna@ti.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/cpu/armv7/am33xx/clock.c5
-rw-r--r--arch/arm/include/asm/arch-am33xx/common_def.h1
-rw-r--r--arch/arm/include/asm/arch-am33xx/cpu.h3
-rw-r--r--arch/arm/include/asm/arch-am33xx/i2c.h81
4 files changed, 89 insertions, 1 deletions
diff --git a/arch/arm/cpu/armv7/am33xx/clock.c b/arch/arm/cpu/armv7/am33xx/clock.c
index 98cfd93..bbb9c13 100644
--- a/arch/arm/cpu/armv7/am33xx/clock.c
+++ b/arch/arm/cpu/armv7/am33xx/clock.c
@@ -113,6 +113,11 @@ static void enable_per_clocks(void)
writel(PRCM_MOD_EN, &cmper->mmc0clkctrl);
while (readl(&cmper->mmc0clkctrl) != PRCM_MOD_EN)
;
+
+ /* i2c0 */
+ writel(PRCM_MOD_EN, &cmwkup->wkup_i2c0ctrl);
+ while (readl(&cmwkup->wkup_i2c0ctrl) != PRCM_MOD_EN)
+ ;
}
static void mpu_pll_config(void)
diff --git a/arch/arm/include/asm/arch-am33xx/common_def.h b/arch/arm/include/asm/arch-am33xx/common_def.h
index 767932d..aa3b554 100644
--- a/arch/arm/include/asm/arch-am33xx/common_def.h
+++ b/arch/arm/include/asm/arch-am33xx/common_def.h
@@ -18,5 +18,6 @@
extern void enable_uart0_pin_mux(void);
extern void enable_mmc0_pin_mux(void);
+extern void enable_i2c0_pin_mux(void);
#endif/*__COMMON_DEF_H__ */
diff --git a/arch/arm/include/asm/arch-am33xx/cpu.h b/arch/arm/include/asm/arch-am33xx/cpu.h
index 25558a2..cd002e6 100644
--- a/arch/arm/include/asm/arch-am33xx/cpu.h
+++ b/arch/arm/include/asm/arch-am33xx/cpu.h
@@ -95,7 +95,8 @@ struct cm_wkuppll {
unsigned int divm2dpllper; /* offset 0xAC */
unsigned int resv11[1];
unsigned int wkup_uart0ctrl; /* offset 0xB4 */
- unsigned int resv12[8];
+ unsigned int wkup_i2c0ctrl; /* offset 0xB8 */
+ unsigned int resv12[7];
unsigned int divm6dpllcore; /* offset 0xD8 */
};
diff --git a/arch/arm/include/asm/arch-am33xx/i2c.h b/arch/arm/include/asm/arch-am33xx/i2c.h
new file mode 100644
index 0000000..366e2bb
--- /dev/null
+++ b/arch/arm/include/asm/arch-am33xx/i2c.h
@@ -0,0 +1,81 @@
+/*
+ * (C) Copyright 2012
+ * Texas Instruments, <www.ti.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#ifndef _I2C_H_
+#define _I2C_H_
+
+#define I2C_BASE1 0x44E0B000
+#define I2C_BASE2 0x4802A000
+#define I2C_BASE3 0x4819C000
+#define I2C_BUS_MAX 3
+
+#define I2C_DEFAULT_BASE I2C_BASE1
+
+struct i2c {
+ unsigned short revnb_lo; /* 0x00 */
+ unsigned short res1;
+ unsigned short revnb_hi; /* 0x04 */
+ unsigned short res2[13];
+ unsigned short sysc; /* 0x20 */
+ unsigned short res3;
+ unsigned short irqstatus_raw; /* 0x24 */
+ unsigned short res4;
+ unsigned short stat; /* 0x28 */
+ unsigned short res5;
+ unsigned short ie; /* 0x2C */
+ unsigned short res6;
+ unsigned short irqenable_clr; /* 0x30 */
+ unsigned short res7;
+ unsigned short iv; /* 0x34 */
+ unsigned short res8[45];
+ unsigned short syss; /* 0x90 */
+ unsigned short res9;
+ unsigned short buf; /* 0x94 */
+ unsigned short res10;
+ unsigned short cnt; /* 0x98 */
+ unsigned short res11;
+ unsigned short data; /* 0x9C */
+ unsigned short res13;
+ unsigned short res14; /* 0xA0 */
+ unsigned short res15;
+ unsigned short con; /* 0xA4 */
+ unsigned short res16;
+ unsigned short oa; /* 0xA8 */
+ unsigned short res17;
+ unsigned short sa; /* 0xAC */
+ unsigned short res18;
+ unsigned short psc; /* 0xB0 */
+ unsigned short res19;
+ unsigned short scll; /* 0xB4 */
+ unsigned short res20;
+ unsigned short sclh; /* 0xB8 */
+ unsigned short res21;
+ unsigned short systest; /* 0xBC */
+ unsigned short res22;
+ unsigned short bufstat; /* 0xC0 */
+ unsigned short res23;
+};
+
+#define I2C_IP_CLK 48000000
+#define I2C_INTERNAL_SAMLPING_CLK 12000000
+
+#endif /* _I2C_H_ */