misc:pmic:core New generic PMIC driver

I2C or SPI PMIC devices can be accessed.
Separate files: pmic_i2c.c and pmic_spi.c are responsible
for handling transmission over I2C or SPI bus.

New flags:
CONFIG_PMIC - enable PMIC general device.
CONFIG_PMIC_I2C/SPI - specify the interface to be used.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Stefano Babic <sbabic@denx.de>

1 files changed, 71 insertions, 0 deletions

diff --git a/include/pmic.h b/include/pmic.h
new file mode 100644
index 0000000000..52a1526d95
--- /dev/null
+++ b/include/pmic.h
@@ -0,0 +1,71 @@
+/*
+ *  Copyright (C) 2011 Samsung Electronics
+ *  Lukasz Majewski <l.majewski@samsung.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 __CORE_PMIC_H_
+#define __CORE_PMIC_H_
+
+enum { PMIC_I2C, PMIC_SPI, };
+enum { I2C_PMIC, I2C_NUM, };
+enum { PMIC_READ, PMIC_WRITE, };
+
+struct p_i2c {
+	unsigned char addr;
+	unsigned char *buf;
+	unsigned char tx_num;
+};
+
+struct p_spi {
+	unsigned int cs;
+	unsigned int mode;
+	unsigned int bitlen;
+	unsigned int clk;
+	unsigned int flags;
+	u32 (*prepare_tx)(u32 reg, u32 *val, u32 write);
+};
+
+struct pmic {
+	const char *name;
+	unsigned char bus;
+	unsigned char interface;
+	unsigned char number_of_regs;
+	union hw {
+		struct p_i2c i2c;
+		struct p_spi spi;
+	} hw;
+};
+
+int pmic_init(void);
+int check_reg(u32 reg);
+struct pmic *get_pmic(void);
+int pmic_probe(struct pmic *p);
+int pmic_reg_read(struct pmic *p, u32 reg, u32 *val);
+int pmic_reg_write(struct pmic *p, u32 reg, u32 val);
+int pmic_set_output(struct pmic *p, u32 reg, int ldo, int on);
+
+#define pmic_i2c_addr (p->hw.i2c.addr)
+#define pmic_i2c_tx_num (p->hw.i2c.tx_num)
+
+#define pmic_spi_bitlen (p->hw.spi.bitlen)
+#define pmic_spi_flags (p->hw.spi.flags)
+
+#endif /* __CORE_PMIC_H_ */