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i3c: master: cdns: Use i3c_writel_fifo() and i3c_readl_fifo()

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Use common inline i3c_writel_fifo()/i3c_readl_fifo() methods to
simplify code since the FIFO of controller is a 32bit width.

Signed-off-by: Jorge Marques <jorge.marques@analog.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20250624-i3c-writesl-readsl-v3-2-63ccf0870f01@analog.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Jorge Marques 2025-06-24 11:06:05 +02:00 committed by Alexandre Belloni
parent 733b439375
commit c20d3fa704
1 changed files with 5 additions and 20 deletions
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25
drivers/i3c/master/i3c-master-cdns.c
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@ -23,6 +23,8 @@
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include "../internals.h"
#define DEV_ID 0x0
#define DEV_ID_I3C_MASTER 0x5034
@ -427,25 +429,13 @@ to_cdns_i3c_master(struct i3c_master_controller *master)
static void cdns_i3c_master_wr_to_tx_fifo(struct cdns_i3c_master *master,
const u8 *bytes, int nbytes)
{
writesl(master->regs + TX_FIFO, bytes, nbytes / 4);
if (nbytes & 3) {
u32 tmp = 0;
memcpy(&tmp, bytes + (nbytes & ~3), nbytes & 3);
writesl(master->regs + TX_FIFO, &tmp, 1);
}
i3c_writel_fifo(master->regs + TX_FIFO, bytes, nbytes);
}
static void cdns_i3c_master_rd_from_rx_fifo(struct cdns_i3c_master *master,
u8 *bytes, int nbytes)
{
readsl(master->regs + RX_FIFO, bytes, nbytes / 4);
if (nbytes & 3) {
u32 tmp;
readsl(master->regs + RX_FIFO, &tmp, 1);
memcpy(bytes + (nbytes & ~3), &tmp, nbytes & 3);
}
i3c_readl_fifo(master->regs + RX_FIFO, bytes, nbytes);
}
static bool cdns_i3c_master_supports_ccc_cmd(struct i3c_master_controller *m,
@ -1330,12 +1320,7 @@ static void cdns_i3c_master_handle_ibi(struct cdns_i3c_master *master,
buf = slot->data;
nbytes = IBIR_XFER_BYTES(ibir);
readsl(master->regs + IBI_DATA_FIFO, buf, nbytes / 4);
if (nbytes % 3) {
u32 tmp = __raw_readl(master->regs + IBI_DATA_FIFO);
memcpy(buf + (nbytes & ~3), &tmp, nbytes & 3);
}
i3c_readl_fifo(master->regs + IBI_DATA_FIFO, buf, nbytes);
slot->len = min_t(unsigned int, IBIR_XFER_BYTES(ibir),
dev->ibi->max_payload_len);