diff options
Diffstat (limited to 'drivers/i3c/internals.h')
| -rw-r--r-- | drivers/i3c/internals.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/i3c/internals.h b/drivers/i3c/internals.h index 433f6088b7ce..0d857cc68cc5 100644 --- a/drivers/i3c/internals.h +++ b/drivers/i3c/internals.h @@ -9,6 +9,7 @@ #define I3C_INTERNALS_H #include <linux/i3c/master.h> +#include <linux/io.h> void i3c_bus_normaluse_lock(struct i3c_bus *bus); void i3c_bus_normaluse_unlock(struct i3c_bus *bus); @@ -22,4 +23,41 @@ int i3c_dev_enable_ibi_locked(struct i3c_dev_desc *dev); int i3c_dev_request_ibi_locked(struct i3c_dev_desc *dev, const struct i3c_ibi_setup *req); void i3c_dev_free_ibi_locked(struct i3c_dev_desc *dev); + +/** + * i3c_writel_fifo - Write data buffer to 32bit FIFO + * @addr: FIFO Address to write to + * @buf: Pointer to the data bytes to write + * @nbytes: Number of bytes to write + */ +static inline void i3c_writel_fifo(void __iomem *addr, const void *buf, + int nbytes) +{ + writesl(addr, buf, nbytes / 4); + if (nbytes & 3) { + u32 tmp = 0; + + memcpy(&tmp, buf + (nbytes & ~3), nbytes & 3); + writel(tmp, addr); + } +} + +/** + * i3c_readl_fifo - Read data buffer from 32bit FIFO + * @addr: FIFO Address to read from + * @buf: Pointer to the buffer to store read bytes + * @nbytes: Number of bytes to read + */ +static inline void i3c_readl_fifo(const void __iomem *addr, void *buf, + int nbytes) +{ + readsl(addr, buf, nbytes / 4); + if (nbytes & 3) { + u32 tmp; + + tmp = readl(addr); + memcpy(buf + (nbytes & ~3), &tmp, nbytes & 3); + } +} + #endif /* I3C_INTERNAL_H */ |