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Commit 7d71b5f4 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Linus Walleij
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pinctrl: pinctrl-single: Avoid divisions in context save/restore 



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: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Acked-by: default avatarTony Lindgren <tony@atomide.com>
Tested-by: default avatarKeerthy <j-keerthy@ti.com>
Reviewed-by: default avatarKeerthy <j-keerthy@ti.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 7547b596

drivers/pinctrl/pinctrl-single.c

+18 −18
Original line number Diff line number Diff line
@@ -1595,19 +1595,19 @@ 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;

	}
@@ -1625,19 +1625,19 @@ 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;

	}

}