Hi,
On Thu, Jan 10, 2019 at 06:40:04PM +0100, Lubomir Rintel wrote:
> This wouldn't work on the DT-based ARM platform. Let's read the EC version
> directly from the EC driver instead.
>
> This removes x86 specific bits that would prevent this driver from being
> used with the EC of ARM-based OLPC XO 1.75.
>
> Signed-off-by: Lubomir Rintel <lkundrak@xxxxx>
> Acked-by: Pavel Machek <pavel@xxxxxx>
> Reviewed-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx>
>
> ---
> 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/olpc_battery.c | 25 +++++++++++++++++--------
> 1 file changed, 17 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/power/supply/olpc_battery.c b/drivers/power/supply/olpc_battery.c
> index 1fcc459433a8..a6c89d002d5d 100644
> --- a/drivers/power/supply/olpc_battery.c
> +++ b/drivers/power/supply/olpc_battery.c
> @@ -22,7 +22,6 @@
> #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 */
> #define EC_BAT_ACR 0x12 /* int16_t, *6250/15, µAh */
> @@ -57,6 +56,7 @@ struct olpc_battery_data {
> struct power_supply *olpc_ac;
> struct power_supply *olpc_bat;
> char bat_serial[17];
> + int new_proto;
bool?
-- Sebastian
> };
>
> /*********************************************************************
> @@ -100,7 +100,7 @@ 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)
> @@ -608,6 +608,7 @@ 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);
> @@ -615,13 +616,21 @@ static int olpc_battery_probe(struct platform_device *pdev)
> 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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