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authorJason Liu <jason.hui@linaro.org>2011-04-12 16:24:21 +0800
committerJohn Rigby <john.rigby@linaro.org>2011-06-28 16:06:07 +0100
commit8d6eafb82d9c9b25e2e0add1e3e4e0fd519d90fe (patch)
treee334d54d349c1a0b98d941795c06c51f325c0d9a /drivers/misc/dialog_pmic.c
parent845f77f1a4e010c2f469e260eb53e15321297280 (diff)
downloadu-boot-linaro-stable-8d6eafb82d9c9b25e2e0add1e3e4e0fd519d90fe.tar.gz
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>
Diffstat (limited to 'drivers/misc/dialog_pmic.c')
-rw-r--r--drivers/misc/dialog_pmic.c123
1 files changed, 123 insertions, 0 deletions
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"
+);