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Date: Thu, 8 Mar 2018 09:37:54 -0800
From: Andrey Smirnov <andrew.smirnov@...il.com>
To: Lee Jones <lee.jones@...aro.org>
Cc: Andrey Smirnov <andrew.smirnov@...il.com>,
linux-kernel@...r.kernel.org, cphealy@...il.com,
Lucas Stach <l.stach@...gutronix.de>,
Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH v2 1/3] mfd: rave-sp: Add code to print firmware versions
Add code that would query and print out bootloader and application
firmware version info.
Cc: linux-kernel@...r.kernel.org
Cc: cphealy@...il.com
Cc: Lucas Stach <l.stach@...gutronix.de>
Cc: Lee Jones <lee.jones@...aro.org>
Cc: Guenter Roeck <linux@...ck-us.net>
Tested-by: Lucas Stach <l.stach@...gutronix.de>
Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
---
Changes since [v1]:
- Removed unused deving from the middle of 'struct rave_status'
[v1] https://lkml.kernel.org/r/20180226150739.13457-1-andrew.smirnov@gmail.com
drivers/mfd/rave-sp.c | 95 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 95 insertions(+)
diff --git a/drivers/mfd/rave-sp.c b/drivers/mfd/rave-sp.c
index c8173de5653a..be243678a61e 100644
--- a/drivers/mfd/rave-sp.c
+++ b/drivers/mfd/rave-sp.c
@@ -160,6 +160,8 @@ struct rave_sp_variant {
* @variant: Device variant specific information
* @event_notifier_list: Input event notification chain
*
+ * @part_number_firmware: Firmware version
+ * @part_number_bootloader: Bootloader version
*/
struct rave_sp {
struct serdev_device *serdev;
@@ -171,8 +173,40 @@ struct rave_sp {
const struct rave_sp_variant *variant;
struct blocking_notifier_head event_notifier_list;
+
+ const char *part_number_firmware;
+ const char *part_number_bootloader;
};
+struct rave_sp_version {
+ u8 hardware;
+ __le16 major;
+ u8 minor;
+ u8 letter[2];
+} __packed;
+
+struct rave_sp_status {
+ struct rave_sp_version bootloader_version;
+ struct rave_sp_version firmware_version;
+ u16 rdu_eeprom_flag;
+ u16 dds_eeprom_flag;
+ u8 pic_flag;
+ u8 orientation;
+ u32 etc;
+ s16 temp[2];
+ u8 backlight_current[3];
+ u8 dip_switch;
+ u8 host_interrupt;
+ u16 voltage_28;
+ u8 i2c_device_status;
+ u8 power_status;
+ u8 general_status;
+ u8 deprecated1;
+ u8 power_led_status;
+ u8 deprecated2;
+ u8 periph_power_shutoff;
+} __packed;
+
static bool rave_sp_id_is_event(u8 code)
{
return (code & 0xF0) == RAVE_SP_EVNT_BASE;
@@ -609,6 +643,52 @@ static int rave_sp_default_cmd_translate(enum rave_sp_command command)
}
}
+static const char *devm_rave_sp_version(struct device *dev,
+ struct rave_sp_version *version)
+{
+ /*
+ * NOTE: The format string below uses %02d to display u16
+ * intentionally for the sake of backwards compatibility with
+ * legacy software.
+ */
+ return devm_kasprintf(dev, GFP_KERNEL, "%02d%02d%02d.%c%c\n",
+ version->hardware,
+ le16_to_cpu(version->major),
+ version->minor,
+ version->letter[0],
+ version->letter[1]);
+}
+
+static int rave_sp_get_status(struct rave_sp *sp)
+{
+ struct device *dev = &sp->serdev->dev;
+ u8 cmd[] = {
+ [0] = RAVE_SP_CMD_STATUS,
+ [1] = 0
+ };
+ struct rave_sp_status status;
+ const char *version;
+ int ret;
+
+ ret = rave_sp_exec(sp, cmd, sizeof(cmd), &status, sizeof(status));
+ if (ret)
+ return ret;
+
+ version = devm_rave_sp_version(dev, &status.firmware_version);
+ if (!version)
+ return -ENOMEM;
+
+ sp->part_number_firmware = version;
+
+ version = devm_rave_sp_version(dev, &status.bootloader_version);
+ if (!version)
+ return -ENOMEM;
+
+ sp->part_number_bootloader = version;
+
+ return 0;
+}
+
static const struct rave_sp_checksum rave_sp_checksum_8b2c = {
.length = 1,
.subroutine = csum_8b2c,
@@ -657,6 +737,7 @@ static const struct serdev_device_ops rave_sp_serdev_device_ops = {
static int rave_sp_probe(struct serdev_device *serdev)
{
struct device *dev = &serdev->dev;
+ const char *unknown = "unknown\n";
struct rave_sp *sp;
u32 baud;
int ret;
@@ -689,6 +770,20 @@ static int rave_sp_probe(struct serdev_device *serdev)
serdev_device_set_baudrate(serdev, baud);
+ ret = rave_sp_get_status(sp);
+ if (ret) {
+ dev_warn(dev, "Failed to get firmware status: %d\n", ret);
+ sp->part_number_firmware = unknown;
+ sp->part_number_bootloader = unknown;
+ }
+
+ /*
+ * Those strings already have a \n embedded, so there's no
+ * need to have one in format string.
+ */
+ dev_info(dev, "Firmware version: %s", sp->part_number_firmware);
+ dev_info(dev, "Bootloader version: %s", sp->part_number_bootloader);
+
return devm_of_platform_populate(dev);
}
--
2.14.3
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