[PATCH v4 14/15] power: supply: olpc_battery: Avoid using platform_info
From: Lubomir Rintel <lkundrak@v3.sk>
Date: 2019-01-08 17:59:16
Also in:
linux-devicetree, linux-pm, lkml, platform-driver-x86
Subsystem:
power supply class/subsystem and drivers, the rest · Maintainers:
Sebastian Reichel, Linus Torvalds
This wouldn't work on the DT-based ARM platform. Let's read the EC version directly from the EC driver instead. This makes the driver no longer x86 specific. Signed-off-by: Lubomir Rintel <lkundrak@v3.sk> Acked-by: Pavel Machek <redacted> Reviewed-by: Sebastian Reichel <redacted> --- Changes since v2: - Move the priv data allocation hunk from this patch to a proper place Changes since v1: - Use uint8_t instead of unsigned char [1] for ecver drivers/power/supply/Kconfig | 2 +- drivers/power/supply/olpc_battery.c | 27 ++++++++++++++++++--------- 2 files changed, 19 insertions(+), 10 deletions(-)
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index e901b9879e7e..67a3bb26da39 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig@@ -151,7 +151,7 @@ config BATTERY_PMU config BATTERY_OLPC tristate "One Laptop Per Child battery" - depends on X86_32 && OLPC + depends on OLPC help Say Y to enable support for the battery on the OLPC laptop.
diff --git a/drivers/power/supply/olpc_battery.c b/drivers/power/supply/olpc_battery.c
index 0c9f7ce6b26b..8ebb4284cf05 100644
--- a/drivers/power/supply/olpc_battery.c
+++ b/drivers/power/supply/olpc_battery.c@@ -20,8 +20,6 @@ #include <linux/jiffies.h> #include <linux/sched.h> #include <linux/olpc-ec.h> -#include <asm/olpc.h> - #define EC_BAT_VOLTAGE 0x10 /* uint16_t, *9.76/32, mV */ #define EC_BAT_CURRENT 0x11 /* int16_t, *15.625/120, mA */
@@ -57,6 +55,7 @@ struct olpc_battery_data { struct power_supply *olpc_ac; struct power_supply *olpc_bat; char bat_serial[17]; + int new_proto; }; /*********************************************************************
@@ -100,7 +99,7 @@ static const struct power_supply_desc olpc_ac_desc = { static int olpc_bat_get_status(struct olpc_battery_data *data, union power_supply_propval *val, uint8_t ec_byte) { - if (olpc_platform_info.ecver > 0x44) { + if (data->new_proto) { if (ec_byte & (BAT_STAT_CHARGING | BAT_STAT_TRICKLE)) val->intval = POWER_SUPPLY_STATUS_CHARGING; else if (ec_byte & BAT_STAT_DISCHARGING)
@@ -608,19 +607,29 @@ static int olpc_battery_probe(struct platform_device *pdev) struct power_supply_config psy_cfg = {}; struct olpc_battery_data *data; uint8_t status; + uint8_t ecver; + int ret; data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; platform_set_drvdata(pdev, data); - /* - * We've seen a number of EC protocol changes; this driver requires - * the latest EC protocol, supported by 0x44 and above. - */ - if (olpc_platform_info.ecver < 0x44) { + /* See if the EC is already there and get the EC revision */ + ret = olpc_ec_cmd(EC_FIRMWARE_REV, NULL, 0, &ecver, 1); + if (ret) + return ret; + + if (ecver > 0x44) { + /* XO 1 or 1.5 with a new EC firmware. */ + data->new_proto = 1; + } else if (ecver < 0x44) { + /* + * We've seen a number of EC protocol changes; this driver + * requires the latest EC protocol, supported by 0x44 and above. + */ printk(KERN_NOTICE "OLPC EC version 0x%02x too old for " - "battery driver.\n", olpc_platform_info.ecver); + "battery driver.\n", ecver); return -ENXIO; }
--
2.20.1
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