diff options
| author | Frank Li <Frank.Li@nxp.com> | 2025-11-06 20:36:02 +0300 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2025-11-29 02:39:08 +0300 |
| commit | 108420fe2100b0c9cfb2d3598681eab3724247b9 (patch) | |
| tree | 49739ddb44d468d71f9cbbb9ad53243de29dd8aa | |
| parent | 9280b6ebbf08e53734d34f3bb325c37cddc1422d (diff) | |
| download | linux-108420fe2100b0c9cfb2d3598681eab3724247b9.tar.xz | |
i3c: master: svc: Replace bool rnw with union for HDR support
Replace the bool rnw field with a union in preparation for adding HDR
support. HDR uses a cmd field instead of the rnw bit to indicate read or
write direction.
Add helper function svc_cmd_is_read() to check transfer direction.
Add a local variable 'rnw' in svc_i3c_master_priv_xfers() to avoid
repeatedly accessing xfers[i].rnw.
No functional change.
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20251106-i3c_ddr-v11-3-33a6a66ed095@nxp.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
| -rw-r--r-- | drivers/i3c/master/svc-i3c-master.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c index e70a64f2a32f..0543f06b9fba 100644 --- a/drivers/i3c/master/svc-i3c-master.c +++ b/drivers/i3c/master/svc-i3c-master.c @@ -165,7 +165,11 @@ struct svc_i3c_cmd { u8 addr; - bool rnw; + union { + bool rnw; + u8 cmd; + u32 rnw_cmd; + }; u8 *in; const void *out; unsigned int len; @@ -383,6 +387,11 @@ svc_i3c_master_dev_from_addr(struct svc_i3c_master *master, return master->descs[i]; } +static bool svc_cmd_is_read(u32 rnw_cmd, u32 type) +{ + return rnw_cmd; +} + static void svc_i3c_master_emit_stop(struct svc_i3c_master *master) { writel(SVC_I3C_MCTRL_REQUEST_STOP, master->regs + SVC_I3C_MCTRL); @@ -1299,10 +1308,11 @@ static int svc_i3c_master_write(struct svc_i3c_master *master, } static int svc_i3c_master_xfer(struct svc_i3c_master *master, - bool rnw, unsigned int xfer_type, u8 addr, + u32 rnw_cmd, unsigned int xfer_type, u8 addr, u8 *in, const u8 *out, unsigned int xfer_len, unsigned int *actual_len, bool continued, bool repeat_start) { + bool rnw = svc_cmd_is_read(rnw_cmd, xfer_type); int retry = repeat_start ? 1 : 2; u32 reg; int ret; @@ -1490,7 +1500,7 @@ static void svc_i3c_master_start_xfer_locked(struct svc_i3c_master *master) for (i = 0; i < xfer->ncmds; i++) { struct svc_i3c_cmd *cmd = &xfer->cmds[i]; - ret = svc_i3c_master_xfer(master, cmd->rnw, xfer->type, + ret = svc_i3c_master_xfer(master, cmd->rnw_cmd, xfer->type, cmd->addr, cmd->in, cmd->out, cmd->len, &cmd->actual_len, cmd->continued, i > 0); @@ -1683,14 +1693,15 @@ static int svc_i3c_master_priv_xfers(struct i3c_dev_desc *dev, for (i = 0; i < nxfers; i++) { struct svc_i3c_cmd *cmd = &xfer->cmds[i]; + bool rnw = xfers[i].rnw; cmd->xfer = &xfers[i]; cmd->addr = master->addrs[data->index]; - cmd->rnw = xfers[i].rnw; - cmd->in = xfers[i].rnw ? xfers[i].data.in : NULL; - cmd->out = xfers[i].rnw ? NULL : xfers[i].data.out; + cmd->rnw = rnw; + cmd->in = rnw ? xfers[i].data.in : NULL; + cmd->out = rnw ? NULL : xfers[i].data.out; cmd->len = xfers[i].len; - cmd->actual_len = xfers[i].rnw ? xfers[i].len : 0; + cmd->actual_len = rnw ? xfers[i].len : 0; cmd->continued = (i + 1) < nxfers; } |