The divisions (and multiplications) can be avoided by changing the loops
to use increments of mux_bytes instead of 1.
While at it, remove the unneeded casts when assigning void pointers.
This saves +100 bytes of kernel size on arm32/arm64.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
Compile-tested only.
As the loops are now identical, the code could be made even smaller by
moving the switch() inside the loop, at the expense of readability.
---
drivers/pinctrl/pinctrl-single.c | 36 ++++++++++++++++++------------------
1 file changed, 18 insertions(+), 18 deletions(-)
diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c
index 9c3c00515aa0fe20..5de5dedb804928eb 100644
--- a/drivers/pinctrl/pinctrl-single.c
+++ b/drivers/pinctrl/pinctrl-single.c
@@ -1593,19 +1593,19 @@ static int pcs_save_context(struct pcs_device *pcs)
switch (pcs->width) {
case 64:
- regsl = (u64 *)pcs->saved_vals;
- for (i = 0; i < pcs->size / mux_bytes; i++)
- regsl[i] = pcs->read(pcs->base + i * mux_bytes);
+ regsl = pcs->saved_vals;
+ for (i = 0; i < pcs->size; i += mux_bytes)
+ *regsl++ = pcs->read(pcs->base + i);
break;
case 32:
- regsw = (u32 *)pcs->saved_vals;
- for (i = 0; i < pcs->size / mux_bytes; i++)
- regsw[i] = pcs->read(pcs->base + i * mux_bytes);
+ regsw = pcs->saved_vals;
+ for (i = 0; i < pcs->size; i += mux_bytes)
+ *regsw++ = pcs->read(pcs->base + i);
break;
case 16:
- regshw = (u16 *)pcs->saved_vals;
- for (i = 0; i < pcs->size / mux_bytes; i++)
- regshw[i] = pcs->read(pcs->base + i * mux_bytes);
+ regshw = pcs->saved_vals;
+ for (i = 0; i < pcs->size; i += mux_bytes)
+ *regshw++ = pcs->read(pcs->base + i);
break;
}
@@ -1623,19 +1623,19 @@ static void pcs_restore_context(struct pcs_device *pcs)
switch (pcs->width) {
case 64:
- regsl = (u64 *)pcs->saved_vals;
- for (i = 0; i < pcs->size / mux_bytes; i++)
- pcs->write(regsl[i], pcs->base + i * mux_bytes);
+ regsl = pcs->saved_vals;
+ for (i = 0; i < pcs->size; i += mux_bytes)
+ pcs->write(*regsl++, pcs->base + i);
break;
case 32:
- regsw = (u32 *)pcs->saved_vals;
- for (i = 0; i < pcs->size / mux_bytes; i++)
- pcs->write(regsw[i], pcs->base + i * mux_bytes);
+ regsw = pcs->saved_vals;
+ for (i = 0; i < pcs->size; i += mux_bytes)
+ pcs->write(*regsw++, pcs->base + i);
break;
case 16:
- regshw = (u16 *)pcs->saved_vals;
- for (i = 0; i < pcs->size / mux_bytes; i++)
- pcs->write(regshw[i], pcs->base + i * mux_bytes);
+ regshw = pcs->saved_vals;
+ for (i = 0; i < pcs->size; i += mux_bytes)
+ pcs->write(*regshw++, pcs->base + i);
break;
}
}
--
2.7.4
--
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