From 5d0674999cc5caec72130ad8ff3a211d153bcef5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Thu, 16 Dec 2021 17:22:04 +0100 Subject: [PATCH] pinctrl: keembay: comment process of building functions a bit MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This should make code a bit easier to follow. While at it use some "for" loops to simplify array iteration loops. Signed-off-by: Rafał Miłecki Link: https://lore.kernel.org/r/20211216162206.8027-2-zajec5@gmail.com Signed-off-by: Linus Walleij --- drivers/pinctrl/pinctrl-keembay.c | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) diff --git a/drivers/pinctrl/pinctrl-keembay.c b/drivers/pinctrl/pinctrl-keembay.c index 2bce563d5b8b..9a602abad8df 100644 --- a/drivers/pinctrl/pinctrl-keembay.c +++ b/drivers/pinctrl/pinctrl-keembay.c @@ -1617,37 +1617,38 @@ static int keembay_build_functions(struct keembay_pinctrl *kpc) struct function_desc *keembay_funcs, *new_funcs; int i; - /* Allocate total number of functions */ + /* + * Allocate maximum possible number of functions. Assume every pin + * being part of 8 (hw maximum) globally unique muxes. + */ kpc->nfuncs = 0; keembay_funcs = kcalloc(kpc->npins * 8, sizeof(*keembay_funcs), GFP_KERNEL); if (!keembay_funcs) return -ENOMEM; - /* Find total number of functions and each's properties */ + /* Setup 1 function for each unique mux */ for (i = 0; i < kpc->npins; i++) { const struct pinctrl_pin_desc *pdesc = keembay_pins + i; - struct keembay_mux_desc *mux = pdesc->drv_data; + struct keembay_mux_desc *mux; - while (mux->name) { - struct function_desc *fdesc = keembay_funcs; + for (mux = pdesc->drv_data; mux->name; mux++) { + struct function_desc *fdesc; - while (fdesc->name) { + /* Check if we already have function for this mux */ + for (fdesc = keembay_funcs; fdesc->name; fdesc++) { if (!strcmp(mux->name, fdesc->name)) { fdesc->num_group_names++; break; } - - fdesc++; } + /* Setup new function for this mux we didn't see before */ if (!fdesc->name) { fdesc->name = mux->name; fdesc->num_group_names = 1; fdesc->data = &mux->mode; kpc->nfuncs++; } - - mux++; } }