mx53loco: PMIC: Add dialog pmic support

Add dialog pmic(DA9053) driver with I2C interface support

Signed-off-by: Jason Liu <jason.hui@linaro.org>
Signed-off-by: Eric Miao <eric.miao@linaro.org>

2 files changed, 124 insertions, 0 deletions

diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index a70970784..eac9f0e92 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -39,6 +39,7 @@ COBJS-$(CONFIG_PMIC_FSL) += pmic_fsl.o
 COBJS-$(CONFIG_PMIC_I2C) += pmic_i2c.o
 COBJS-$(CONFIG_PMIC_SPI) += pmic_spi.o
 COBJS-$(CONFIG_PMIC_MAX8998) += pmic_max8998.o
+COBJS-$(CONFIG_DIALOG_PMIC) += dialog_pmic.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)
diff --git a/drivers/misc/dialog_pmic.c b/drivers/misc/dialog_pmic.c
new file mode 100644
index 000000000..95dc6ea5f
--- /dev/null
+++ b/drivers/misc/dialog_pmic.c
@@ -0,0 +1,123 @@
+/*
+ * (C) Copyright 2011 Freescale Semiconductor, Inc.
+ * Based on drivers/misc/fsl_pmic.c
+ *
+ * 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
+ */
+
+#include <config.h>
+#include <common.h>
+#include <i2c.h>
+#include <asm/errno.h>
+#include <linux/types.h>
+
+static int check_param(u32 reg, u32 write)
+{
+	if (reg > 142 || write > 1) {
+		printf("<reg num> = %d is invalid. Should be less then 142\n",
+			reg);
+		return -1;
+	}
+
+	return 0;
+}
+
+static u32 pmic_reg(u32 reg, u32 val, u32 write)
+{
+	unsigned char buf[1] = { 0 };
+	u32 ret_val = 0;
+
+	if (check_param(reg, write))
+		return -1;
+
+	if (write) {
+		buf[0] = (val) & 0xff;
+		if (i2c_write(CONFIG_SYS_DIALOG_PMIC_I2C_ADDR, reg, 1, buf, 1))
+			return -1;
+	} else {
+		if (i2c_read(CONFIG_SYS_DIALOG_PMIC_I2C_ADDR, reg, 1, buf, 1))
+			return -1;
+		ret_val = buf[0];
+	}
+
+	return ret_val;
+}
+
+void pmic_reg_write(u32 reg, u32 value)
+{
+	pmic_reg(reg, value, 1);
+}
+
+u32 pmic_reg_read(u32 reg)
+{
+	return pmic_reg(reg, 0, 0);
+}
+
+static void pmic_dump(int numregs)
+{
+	u32 val;
+	int i;
+
+	for (i = 0; i < numregs; i++) {
+		val = pmic_reg_read(i);
+		if (!(i % 8))
+			printf("\n0x%02x: ", i);
+		printf("%02x ", val);
+	}
+	puts("\n");
+}
+
+int do_pmic(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	char *cmd;
+	int nregs;
+	u32 val;
+
+	/* at least two arguments please */
+	if (argc < 2)
+		return cmd_usage(cmdtp);
+
+	cmd = argv[1];
+	if (strcmp(cmd, "dump") == 0) {
+		if (argc < 3)
+			return cmd_usage(cmdtp);
+
+		nregs = simple_strtoul(argv[2], NULL, 16);
+		pmic_dump(nregs);
+		return 0;
+	}
+	if (strcmp(cmd, "write") == 0) {
+		if (argc < 4)
+			return cmd_usage(cmdtp);
+
+		nregs = simple_strtoul(argv[2], NULL, 16);
+		val = simple_strtoul(argv[3], NULL, 16);
+		pmic_reg_write(nregs, val);
+		return 0;
+	}
+	/* No subcommand found */
+	return 1;
+}
+
+U_BOOT_CMD(
+	pmic,	CONFIG_SYS_MAXARGS, 1, do_pmic,
+	"Dialog PMIC (DA905x)",
+	"dump [numregs] dump registers\n"
+	"pmic write <reg> <value> - write register"
+);