Use byteorder conversion function instead of manually assembling data from/to MCU.
Signed-off-by: Marek Behún kabel@kernel.org --- drivers/gpio/turris_omnia_mcu.c | 80 +++++++++++++++++++-------------- 1 file changed, 46 insertions(+), 34 deletions(-)
diff --git a/drivers/gpio/turris_omnia_mcu.c b/drivers/gpio/turris_omnia_mcu.c index da9a6efe6d..c441d07d69 100644 --- a/drivers/gpio/turris_omnia_mcu.c +++ b/drivers/gpio/turris_omnia_mcu.c @@ -5,6 +5,7 @@ #include <dm.h> #include <i2c.h> #include <turris-omnia-mcu-interface.h> +#include <asm/byteorder.h> #include <asm/gpio.h> #include <linux/log2.h>
@@ -51,27 +52,31 @@ static int turris_omnia_mcu_get_function(struct udevice *dev, uint offset) static int turris_omnia_mcu_get_value(struct udevice *dev, uint offset) { struct turris_omnia_mcu_info *info = dev_get_plat(dev); - u8 val16[2]; - u8 val32[4]; + u32 val32; + u16 val16; int ret;
switch (offset) { /* bank 0 */ case 0 ... 15: - ret = dm_i2c_read(dev, CMD_GET_STATUS_WORD, val16, 2); + ret = dm_i2c_read(dev, CMD_GET_STATUS_WORD, (void *)&val16, + sizeof(val16)); if (ret) return ret; - return ((((u16)val16[1] << 8) | val16[0]) >> offset) & 0x1; + + return !!(le16_to_cpu(val16) & BIT(offset));
/* bank 1 - supported only when FEAT_EXT_CMDS is set */ case (16 + 0) ... (16 + 31): if (!(info->features & FEAT_EXT_CMDS)) return -EINVAL; - ret = dm_i2c_read(dev, CMD_GET_EXT_STATUS_DWORD, val32, 4); + + ret = dm_i2c_read(dev, CMD_GET_EXT_STATUS_DWORD, (void *)&val32, + sizeof(val32)); if (ret) return ret; - return ((((u32)val32[3] << 24) | ((u32)val32[2] << 16) | - ((u32)val32[1] << 8) | val32[0]) >> (offset - 16)) & 0x1; + + return !!(le32_to_cpu(val32) & BIT(offset - 16));
/* bank 2 - supported only when FEAT_EXT_CMDS and FEAT_PERIPH_MCU is set */ case (16 + 32 + 0) ... (16 + 32 + 15): @@ -79,10 +84,13 @@ static int turris_omnia_mcu_get_value(struct udevice *dev, uint offset) return -EINVAL; if (!(info->features & FEAT_PERIPH_MCU)) return -EINVAL; - ret = dm_i2c_read(dev, CMD_GET_EXT_CONTROL_STATUS, val16, 2); + + ret = dm_i2c_read(dev, CMD_GET_EXT_CONTROL_STATUS, + (void *)&val16, sizeof(val16)); if (ret) return ret; - return ((((u16)val16[1] << 8) | val16[0]) >> (offset - 16 - 32)) & 0x1; + + return !!(le16_to_cpu(val16) & BIT(offset - 16 - 32));
default: return -EINVAL; @@ -92,30 +100,33 @@ static int turris_omnia_mcu_get_value(struct udevice *dev, uint offset) static int turris_omnia_mcu_set_value(struct udevice *dev, uint offset, int value) { struct turris_omnia_mcu_info *info = dev_get_plat(dev); - u8 val16[2]; - u8 val32[4]; + u16 valmask16[2]; + u8 valmask8[2];
switch (offset) { /* bank 0 */ case 0 ... 15: switch (offset) { case ilog2(STS_USB30_PWRON): - val16[1] = CTL_USB30_PWRON; + valmask8[1] = CTL_USB30_PWRON; break; case ilog2(STS_USB31_PWRON): - val16[1] = CTL_USB31_PWRON; + valmask8[1] = CTL_USB31_PWRON; break; case ilog2(STS_ENABLE_4V5): - val16[1] = CTL_ENABLE_4V5; + valmask8[1] = CTL_ENABLE_4V5; break; case ilog2(STS_BUTTON_MODE): - val16[1] = CTL_BUTTON_MODE; + valmask8[1] = CTL_BUTTON_MODE; break; default: return -EINVAL; } - val16[0] = value ? val16[1] : 0; - return dm_i2c_write(dev, CMD_GENERAL_CONTROL, val16, sizeof(val16)); + + valmask8[0] = value ? valmask8[1] : 0; + + return dm_i2c_write(dev, CMD_GENERAL_CONTROL, valmask8, + sizeof(valmask8));
/* bank 2 - supported only when FEAT_EXT_CMDS and FEAT_PERIPH_MCU is set */ case (16 + 32 + 0) ... (16 + 32 + 15): @@ -123,11 +134,12 @@ static int turris_omnia_mcu_set_value(struct udevice *dev, uint offset, int valu return -EINVAL; if (!(info->features & FEAT_PERIPH_MCU)) return -EINVAL; - val32[3] = BIT(offset - 16 - 32) >> 8; - val32[2] = BIT(offset - 16 - 32) & 0xff; - val32[1] = value ? val32[3] : 0; - val32[0] = value ? val32[2] : 0; - return dm_i2c_write(dev, CMD_EXT_CONTROL, val32, sizeof(val32)); + + valmask16[1] = cpu_to_le16(BIT(offset - 16 - 32)); + valmask16[0] = value ? valmask16[1] : 0; + + return dm_i2c_write(dev, CMD_EXT_CONTROL, (void *)valmask16, + sizeof(valmask16));
default: return -EINVAL; @@ -216,25 +228,25 @@ 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 status; - u8 val[2]; + u16 val; int ret;
- ret = dm_i2c_read(dev, CMD_GET_STATUS_WORD, val, 2); - if (ret) { - printf("Error: turris_omnia_mcu CMD_GET_STATUS_WORD failed: %d\n", ret); + ret = dm_i2c_read(dev, CMD_GET_STATUS_WORD, (void *)&val, sizeof(val)); + if (ret < 0) { + printf("Error: turris_omnia_mcu CMD_GET_STATUS_WORD failed: %d\n", + ret); return ret; }
- status = ((u16)val[1] << 8) | val[0]; - - if (status & STS_FEATURES_SUPPORTED) { - ret = dm_i2c_read(dev, CMD_GET_FEATURES, val, 2); - if (ret) { - printf("Error: turris_omnia_mcu CMD_GET_FEATURES failed: %d\n", ret); + if (le16_to_cpu(val) & STS_FEATURES_SUPPORTED) { + ret = dm_i2c_read(dev, CMD_GET_FEATURES, (void *)&val, + sizeof(val)); + if (ret < 0) { + printf("Error: turris_omnia_mcu CMD_GET_FEATURES failed: %d\n", + ret); return ret; } - info->features = ((u16)val[1] << 8) | val[0]; + info->features = le16_to_cpu(val); }
uc_priv->bank_name = "mcu_";