Update firmware features reading to try reading 32 bits of features and fallback to reading 16 bits.
Signed-off-by: Marek Behún kabel@kernel.org Reviewed-by: Stefan Roese sr@denx.de --- drivers/gpio/turris_omnia_mcu.c | 32 ++++++++++++++++++++++---------- 1 file changed, 22 insertions(+), 10 deletions(-)
diff --git a/drivers/gpio/turris_omnia_mcu.c b/drivers/gpio/turris_omnia_mcu.c index c441d07d69..40ced261e3 100644 --- a/drivers/gpio/turris_omnia_mcu.c +++ b/drivers/gpio/turris_omnia_mcu.c @@ -10,7 +10,7 @@ #include <linux/log2.h>
struct turris_omnia_mcu_info { - u16 features; + u32 features; };
static int turris_omnia_mcu_get_function(struct udevice *dev, uint offset) @@ -228,25 +228,37 @@ static int turris_omnia_mcu_probe(struct udevice *dev) { struct turris_omnia_mcu_info *info = dev_get_plat(dev); struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); - u16 val; + u32 dword; + u16 word; int ret;
- ret = dm_i2c_read(dev, CMD_GET_STATUS_WORD, (void *)&val, sizeof(val)); + ret = dm_i2c_read(dev, CMD_GET_STATUS_WORD, (void *)&word, sizeof(word)); if (ret < 0) { printf("Error: turris_omnia_mcu CMD_GET_STATUS_WORD failed: %d\n", ret); return ret; }
- if (le16_to_cpu(val) & STS_FEATURES_SUPPORTED) { - ret = dm_i2c_read(dev, CMD_GET_FEATURES, (void *)&val, - sizeof(val)); + if (le16_to_cpu(word) & STS_FEATURES_SUPPORTED) { + /* try read 32-bit features */ + ret = dm_i2c_read(dev, CMD_GET_FEATURES, (void *)&dword, + sizeof(dword)); if (ret < 0) { - printf("Error: turris_omnia_mcu CMD_GET_FEATURES failed: %d\n", - ret); - return ret; + /* try read 16-bit features */ + ret = dm_i2c_read(dev, CMD_GET_FEATURES, (void *)&word, + sizeof(word)); + if (ret < 0) { + printf("Error: turris_omnia_mcu CMD_GET_FEATURES failed: %d\n", + ret); + return ret; + } + + info->features = le16_to_cpu(word); + } else { + info->features = le32_to_cpu(dword); + if (info->features & FEAT_FROM_BIT_16_INVALID) + info->features &= GENMASK(15, 0); } - info->features = le16_to_cpu(val); }
uc_priv->bank_name = "mcu_";