[U-Boot] [PATCH v4 06/16] dm: pmic: add pmic command
Przemyslaw Marczak
p.marczak at samsung.com
Mon Apr 20 20:07:43 CEST 2015
This is new command for the PMIC devices based on driver model PMIC API.
Command features are unchanged:
- list UCLASS pmic devices
- show or [set] operating pmic device (NEW)
- dump registers
- read byte of register at address
- write byte to register at address
The only one change for this command is 'dev' subcommand.
Signed-off-by: Przemyslaw Marczak <p.marczak at samsung.com>
---
Changes v3:
- new file
- add Kconfig
Changes V4:
- common/cmd_pmic.c: cleanup
- move config name: CONFIG_DM_PMIC_CMD to CONFIG_CMD_PMIC
---
common/Kconfig | 14 ++++
common/Makefile | 3 +
common/cmd_pmic.c | 231 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 248 insertions(+)
create mode 100644 common/cmd_pmic.c
diff --git a/common/Kconfig b/common/Kconfig
index 17930a4..4666f8e 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -457,4 +457,18 @@ config BOOTSTAGE_STASH_SIZE
endmenu
+menu "Power commands"
+config CMD_PMIC
+ bool "Enable Driver Model PMIC command"
+ depends on DM_PMIC
+ help
+ This is the pmic command, based on a driver model pmic's API.
+ Command features are unchanged:
+ - list - list pmic devices
+ - pmic dev <id> - show or [set] operating pmic device (NEW)
+ - pmic dump - dump registers
+ - pmic read address - read byte of register at address
+ - pmic write address - write byte to register at address
+ The only one change for this command is 'dev' subcommand.
+endmenu
endmenu
diff --git a/common/Makefile b/common/Makefile
index 252fbf1..87a3efe 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -209,6 +209,9 @@ obj-$(CONFIG_UPDATE_TFTP) += update.o
obj-$(CONFIG_USB_KEYBOARD) += usb_kbd.o
obj-$(CONFIG_CMD_DFU) += cmd_dfu.o
obj-$(CONFIG_CMD_GPT) += cmd_gpt.o
+
+# Power
+obj-$(CONFIG_CMD_PMIC) += cmd_pmic.o
endif
ifdef CONFIG_SPL_BUILD
diff --git a/common/cmd_pmic.c b/common/cmd_pmic.c
new file mode 100644
index 0000000..bd88d68
--- /dev/null
+++ b/common/cmd_pmic.c
@@ -0,0 +1,231 @@
+/*
+ * Copyright (C) 2014-2015 Samsung Electronics
+ * Przemyslaw Marczak <p.marczak at samsung.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#include <common.h>
+#include <errno.h>
+#include <dm.h>
+#include <dm/uclass-internal.h>
+#include <power/pmic.h>
+
+#define LIMIT_SEQ 3
+#define LIMIT_DEVNAME 20
+
+static struct udevice *currdev;
+
+static int failed(const char *getset, const char *thing,
+ const char *for_dev, int ret)
+{
+ printf("Can't %s %s %s.\nError: %d (%s)\n", getset, thing, for_dev,
+ ret, errno_str(ret));
+ return CMD_RET_FAILURE;
+}
+
+static int pmic_dev_get(bool list_only, int get_seq, struct udevice **devp)
+{
+ struct udevice *dev;
+ int ret;
+
+ if (devp)
+ *devp = NULL;
+
+ for (ret = uclass_first_device(UCLASS_PMIC, &dev); dev;
+ ret = uclass_next_device(&dev)) {
+ if (list_only) {
+ printf("|%*d | %-*.*s| %-*.*s| %s @ %d\n",
+ LIMIT_SEQ, dev->seq,
+ LIMIT_DEVNAME, LIMIT_DEVNAME, dev->name,
+ LIMIT_DEVNAME, LIMIT_DEVNAME, dev->parent->name,
+ dev_get_uclass_name(dev->parent),
+ dev->parent->seq);
+ continue;
+ }
+
+ if (dev->seq == get_seq) {
+ if (devp)
+ *devp = dev;
+ else
+ return -EINVAL;
+
+ return 0;
+ }
+ }
+
+ if (list_only)
+ return ret;
+
+ return -ENODEV;
+}
+
+static int do_dev(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ int seq, ret = -ENODEV;
+
+ switch (argc) {
+ case 2:
+ seq = simple_strtoul(argv[1], NULL, 0);
+ ret = uclass_get_device_by_seq(UCLASS_PMIC, seq, &currdev);
+ if (ret && (ret = pmic_dev_get(false, seq, &currdev)))
+ goto failed;
+ case 1:
+ if (!currdev)
+ goto failed;
+
+ printf("dev: %d @ %s\n", currdev->seq, currdev->name);
+ }
+
+ return CMD_RET_SUCCESS;
+failed:
+ return failed("get", "the", "device", ret);
+}
+
+static int do_list(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ struct udevice *dev;
+ int ret;
+
+ printf("|%*s | %-*.*s| %-*.*s| %s @ %s\n",
+ LIMIT_SEQ, "Seq",
+ LIMIT_DEVNAME, LIMIT_DEVNAME, "Name",
+ LIMIT_DEVNAME, LIMIT_DEVNAME, "Parent name",
+ "Parent uclass", "seq");
+
+ for (ret = uclass_first_device(UCLASS_PMIC, &dev); dev;
+ ret = uclass_next_device(&dev)) {
+ printf("|%*d | %-*.*s| %-*.*s| %s @ %d\n",
+ LIMIT_SEQ, dev->seq,
+ LIMIT_DEVNAME, LIMIT_DEVNAME, dev->name,
+ LIMIT_DEVNAME, LIMIT_DEVNAME, dev->parent->name,
+ dev_get_uclass_name(dev->parent), dev->parent->seq);
+ }
+
+ if (ret)
+ return CMD_RET_FAILURE;
+
+ return CMD_RET_SUCCESS;
+}
+
+static int do_dump(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ struct udevice *dev;
+ uint8_t value;
+ uint reg;
+ int ret;
+
+ if (!currdev)
+ return failed("get", "current", "device", -ENODEV);
+
+ dev = currdev;
+
+ printf("Dump pmic: %s registers\n", dev->name);
+
+ for (reg = 0; reg < pmic_reg_count(dev); reg++) {
+ ret = pmic_read(dev, reg, &value, 1);
+ if (ret)
+ return failed("read", dev->name, "register", ret);
+
+ if (!(reg % 16))
+ printf("\n0x%02x: ", reg);
+
+ printf("%2.2x ", value);
+ }
+ printf("\n");
+
+ return CMD_RET_SUCCESS;
+}
+
+static int do_read(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ struct udevice *dev;
+ int regs, ret;
+ uint8_t value;
+ uint reg;
+
+ if (!currdev)
+ return failed("get", "current", "device", -ENODEV);
+
+ dev = currdev;
+
+ if (argc != 2)
+ return CMD_RET_USAGE;
+
+ reg = simple_strtoul(argv[1], NULL, 0);
+ regs = pmic_reg_count(dev);
+ if (reg > regs) {
+ printf("Pmic max reg: %d\n", regs);
+ return failed("read", "given", "address", -EFAULT);
+ }
+
+ ret = pmic_read(dev, reg, &value, 1);
+ if (ret)
+ return failed("read", dev->name, "register", ret);
+
+ printf("0x%02x: 0x%2.2x\n", reg, value);
+
+ return CMD_RET_SUCCESS;
+}
+
+static int do_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ struct udevice *dev;
+ int regs, ret;
+ uint8_t value;
+ uint reg;
+
+ if (!currdev)
+ return failed("get", "current", "device", -ENODEV);
+
+ dev = currdev;
+
+ if (argc != 3)
+ return CMD_RET_USAGE;
+
+ reg = simple_strtoul(argv[1], NULL, 0);
+ regs = pmic_reg_count(dev);
+ if (reg > regs) {
+ printf("Pmic max reg: %d\n", regs);
+ return failed("write", "given", "address", -EFAULT);
+ }
+
+ value = simple_strtoul(argv[2], NULL, 0);
+
+ ret = pmic_write(dev, reg, &value, 1);
+ if (ret)
+ return failed("write", dev->name, "register", ret);
+
+ return CMD_RET_SUCCESS;
+}
+
+static cmd_tbl_t subcmd[] = {
+ U_BOOT_CMD_MKENT(dev, 2, 1, do_dev, "", ""),
+ U_BOOT_CMD_MKENT(list, 1, 1, do_list, "", ""),
+ U_BOOT_CMD_MKENT(dump, 1, 1, do_dump, "", ""),
+ U_BOOT_CMD_MKENT(read, 2, 1, do_read, "", ""),
+ U_BOOT_CMD_MKENT(write, 3, 1, do_write, "", ""),
+};
+
+static int do_pmic(cmd_tbl_t *cmdtp, int flag, int argc,
+ char * const argv[])
+{
+ cmd_tbl_t *cmd;
+
+ argc--;
+ argv++;
+
+ cmd = find_cmd_tbl(argv[0], subcmd, ARRAY_SIZE(subcmd));
+ if (cmd == NULL || argc > cmd->maxargs)
+ return CMD_RET_USAGE;
+
+ return cmd->cmd(cmdtp, flag, argc, argv);
+}
+
+U_BOOT_CMD(pmic, CONFIG_SYS_MAXARGS, 1, do_pmic,
+ " operations",
+ "list - list pmic devices\n"
+ "pmic dev [id] - show or [set] operating pmic device\n"
+ "pmic dump - dump registers\n"
+ "pmic read address - read byte of register at address\n"
+ "pmic write address - write byte to register at address\n"
+);
--
1.9.1
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