mirror of
https://github.com/openwrt/openwrt.git
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cd2fdaf717
Removed because they are upstream:
generic/pending-5.15/778-net-l2tp-drop-flow-hash-on-forward.patch
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.15.y&id=e97e0051056b6dbcc43ae1862dcfcb05d06517c3
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
(cherry picked from commit 6cfa186544)
458 lines
12 KiB
Diff
458 lines
12 KiB
Diff
From fb34a9ae383ae26326d4889fd2513e49f1019b88 Mon Sep 17 00:00:00 2001
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From: Zhiyong Tao <zhiyong.tao@mediatek.com>
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Date: Fri, 24 Sep 2021 16:06:31 +0800
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Subject: [PATCH] pinctrl: mediatek: support rsel feature
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This patch supports rsel(resistance selection) feature for I2C pins.
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It provides more resistance selection solution in different ICs.
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It provides rsel define and si unit solution by identifying
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"mediatek,rsel_resistance_in_si_unit" property in pio dtsi node.
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Signed-off-by: Zhiyong Tao <zhiyong.tao@mediatek.com>
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Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
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Link: https://lore.kernel.org/r/20210924080632.28410-5-zhiyong.tao@mediatek.com
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Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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---
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.../pinctrl/mediatek/pinctrl-mtk-common-v2.c | 231 +++++++++++++++---
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.../pinctrl/mediatek/pinctrl-mtk-common-v2.h | 46 ++++
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drivers/pinctrl/mediatek/pinctrl-paris.c | 60 +++--
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3 files changed, 289 insertions(+), 48 deletions(-)
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--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
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+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
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@@ -665,6 +665,181 @@ out:
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return err;
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}
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+static int mtk_hw_pin_rsel_lookup(struct mtk_pinctrl *hw,
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+ const struct mtk_pin_desc *desc,
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+ u32 pullup, u32 arg, u32 *rsel_val)
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+{
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+ const struct mtk_pin_rsel *rsel;
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+ int check;
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+ bool found = false;
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+
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+ rsel = hw->soc->pin_rsel;
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+
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+ for (check = 0; check <= hw->soc->npin_rsel - 1; check++) {
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+ if (desc->number >= rsel[check].s_pin &&
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+ desc->number <= rsel[check].e_pin) {
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+ if (pullup) {
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+ if (rsel[check].up_rsel == arg) {
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+ found = true;
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+ *rsel_val = rsel[check].rsel_index;
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+ break;
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+ }
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+ } else {
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+ if (rsel[check].down_rsel == arg) {
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+ found = true;
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+ *rsel_val = rsel[check].rsel_index;
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+ break;
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+ }
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+ }
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+ }
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+ }
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+
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+ if (!found) {
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+ dev_err(hw->dev, "Not support rsel value %d Ohm for pin = %d (%s)\n",
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+ arg, desc->number, desc->name);
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+ return -ENOTSUPP;
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+ }
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+
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+ return 0;
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+}
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+
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+static int mtk_pinconf_bias_set_rsel(struct mtk_pinctrl *hw,
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+ const struct mtk_pin_desc *desc,
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+ u32 pullup, u32 arg)
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+{
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+ int err, rsel_val;
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+
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+ if (hw->rsel_si_unit) {
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+ /* find pin rsel_index from pin_rsel array*/
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+ err = mtk_hw_pin_rsel_lookup(hw, desc, pullup, arg, &rsel_val);
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+ if (err)
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+ goto out;
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+ } else {
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+ if (arg < MTK_PULL_SET_RSEL_000 ||
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+ arg > MTK_PULL_SET_RSEL_111) {
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+ err = -EINVAL;
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+ goto out;
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+ }
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+
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+ rsel_val = arg - MTK_PULL_SET_RSEL_000;
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+ }
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+
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+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_RSEL, rsel_val);
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+ if (err)
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+ goto out;
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+
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+ err = mtk_pinconf_bias_set_pu_pd(hw, desc, pullup, MTK_ENABLE);
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+
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+out:
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+ return err;
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+}
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+
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+int mtk_pinconf_bias_set_combo(struct mtk_pinctrl *hw,
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+ const struct mtk_pin_desc *desc,
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+ u32 pullup, u32 arg)
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+{
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+ int err = -ENOTSUPP;
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+ u32 try_all_type;
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+
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+ if (hw->soc->pull_type)
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+ try_all_type = hw->soc->pull_type[desc->number];
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+ else
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+ try_all_type = MTK_PULL_TYPE_MASK;
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+
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+ if (try_all_type & MTK_PULL_RSEL_TYPE) {
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+ err = mtk_pinconf_bias_set_rsel(hw, desc, pullup, arg);
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+ if (!err)
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+ return err;
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+ }
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+
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+ if (try_all_type & MTK_PULL_PU_PD_TYPE) {
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+ err = mtk_pinconf_bias_set_pu_pd(hw, desc, pullup, arg);
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+ if (!err)
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+ return err;
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+ }
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+
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+ if (try_all_type & MTK_PULL_PULLSEL_TYPE) {
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+ err = mtk_pinconf_bias_set_pullsel_pullen(hw, desc,
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+ pullup, arg);
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+ if (!err)
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+ return err;
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+ }
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+
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+ if (try_all_type & MTK_PULL_PUPD_R1R0_TYPE)
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+ err = mtk_pinconf_bias_set_pupd_r1_r0(hw, desc, pullup, arg);
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+
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+ if (err)
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+ dev_err(hw->dev, "Invalid pull argument\n");
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+
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+ return err;
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+}
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+EXPORT_SYMBOL_GPL(mtk_pinconf_bias_set_combo);
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+
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+static int mtk_rsel_get_si_unit(struct mtk_pinctrl *hw,
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+ const struct mtk_pin_desc *desc,
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+ u32 pullup, u32 rsel_val, u32 *si_unit)
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+{
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+ const struct mtk_pin_rsel *rsel;
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+ int check;
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+
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+ rsel = hw->soc->pin_rsel;
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+
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+ for (check = 0; check <= hw->soc->npin_rsel - 1; check++) {
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+ if (desc->number >= rsel[check].s_pin &&
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+ desc->number <= rsel[check].e_pin) {
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+ if (rsel_val == rsel[check].rsel_index) {
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+ if (pullup)
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+ *si_unit = rsel[check].up_rsel;
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+ else
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+ *si_unit = rsel[check].down_rsel;
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+ break;
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+ }
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+ }
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+ }
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+
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+ return 0;
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+}
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+
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+static int mtk_pinconf_bias_get_rsel(struct mtk_pinctrl *hw,
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+ const struct mtk_pin_desc *desc,
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+ u32 *pullup, u32 *enable)
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+{
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+ int pu, pd, rsel, err;
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+
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+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_RSEL, &rsel);
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+ if (err)
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+ goto out;
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+
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+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PU, &pu);
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+ if (err)
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+ goto out;
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+
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+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PD, &pd);
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+
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+ if (pu == 0 && pd == 0) {
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+ *pullup = 0;
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+ *enable = MTK_DISABLE;
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+ } else if (pu == 1 && pd == 0) {
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+ *pullup = 1;
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+ if (hw->rsel_si_unit)
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+ mtk_rsel_get_si_unit(hw, desc, *pullup, rsel, enable);
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+ else
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+ *enable = rsel + MTK_PULL_SET_RSEL_000;
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+ } else if (pu == 0 && pd == 1) {
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+ *pullup = 0;
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+ if (hw->rsel_si_unit)
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+ mtk_rsel_get_si_unit(hw, desc, *pullup, rsel, enable);
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+ else
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+ *enable = rsel + MTK_PULL_SET_RSEL_000;
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+ } else {
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+ err = -EINVAL;
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+ goto out;
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+ }
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+
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+out:
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+ return err;
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+}
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+
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static int mtk_pinconf_bias_get_pu_pd(struct mtk_pinctrl *hw,
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const struct mtk_pin_desc *desc,
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u32 *pullup, u32 *enable)
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@@ -746,44 +921,40 @@ out:
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return err;
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}
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-int mtk_pinconf_bias_set_combo(struct mtk_pinctrl *hw,
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- const struct mtk_pin_desc *desc,
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- u32 pullup, u32 arg)
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-{
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- int err;
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-
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- err = mtk_pinconf_bias_set_pu_pd(hw, desc, pullup, arg);
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- if (!err)
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- goto out;
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-
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- err = mtk_pinconf_bias_set_pullsel_pullen(hw, desc, pullup, arg);
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- if (!err)
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- goto out;
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-
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- err = mtk_pinconf_bias_set_pupd_r1_r0(hw, desc, pullup, arg);
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-
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-out:
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- return err;
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-}
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-EXPORT_SYMBOL_GPL(mtk_pinconf_bias_set_combo);
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-
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int mtk_pinconf_bias_get_combo(struct mtk_pinctrl *hw,
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const struct mtk_pin_desc *desc,
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u32 *pullup, u32 *enable)
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{
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- int err;
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+ int err = -ENOTSUPP;
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+ u32 try_all_type;
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- err = mtk_pinconf_bias_get_pu_pd(hw, desc, pullup, enable);
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- if (!err)
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- goto out;
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+ if (hw->soc->pull_type)
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+ try_all_type = hw->soc->pull_type[desc->number];
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+ else
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+ try_all_type = MTK_PULL_TYPE_MASK;
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- err = mtk_pinconf_bias_get_pullsel_pullen(hw, desc, pullup, enable);
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- if (!err)
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- goto out;
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+ if (try_all_type & MTK_PULL_RSEL_TYPE) {
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+ err = mtk_pinconf_bias_get_rsel(hw, desc, pullup, enable);
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+ if (!err)
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+ return err;
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+ }
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+
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+ if (try_all_type & MTK_PULL_PU_PD_TYPE) {
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+ err = mtk_pinconf_bias_get_pu_pd(hw, desc, pullup, enable);
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+ if (!err)
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+ return err;
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+ }
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+
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+ if (try_all_type & MTK_PULL_PULLSEL_TYPE) {
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+ err = mtk_pinconf_bias_get_pullsel_pullen(hw, desc,
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+ pullup, enable);
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+ if (!err)
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+ return err;
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+ }
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- err = mtk_pinconf_bias_get_pupd_r1_r0(hw, desc, pullup, enable);
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+ if (try_all_type & MTK_PULL_PUPD_R1R0_TYPE)
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+ err = mtk_pinconf_bias_get_pupd_r1_r0(hw, desc, pullup, enable);
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-out:
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return err;
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}
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EXPORT_SYMBOL_GPL(mtk_pinconf_bias_get_combo);
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--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
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+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
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@@ -17,6 +17,22 @@
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#define MTK_ENABLE 1
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#define MTK_PULLDOWN 0
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#define MTK_PULLUP 1
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+#define MTK_PULL_PU_PD_TYPE BIT(0)
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+#define MTK_PULL_PULLSEL_TYPE BIT(1)
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+#define MTK_PULL_PUPD_R1R0_TYPE BIT(2)
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+/* MTK_PULL_RSEL_TYPE can select resistance and can be
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+ * turned on/off itself. But it can't be selected pull up/down
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+ */
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+#define MTK_PULL_RSEL_TYPE BIT(3)
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+/* MTK_PULL_PU_PD_RSEL_TYPE is a type which is controlled by
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+ * MTK_PULL_PU_PD_TYPE and MTK_PULL_RSEL_TYPE.
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+ */
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+#define MTK_PULL_PU_PD_RSEL_TYPE (MTK_PULL_PU_PD_TYPE \
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+ | MTK_PULL_RSEL_TYPE)
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+#define MTK_PULL_TYPE_MASK (MTK_PULL_PU_PD_TYPE |\
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+ MTK_PULL_PULLSEL_TYPE |\
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+ MTK_PULL_PUPD_R1R0_TYPE |\
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+ MTK_PULL_RSEL_TYPE)
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#define EINT_NA U16_MAX
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#define NO_EINT_SUPPORT EINT_NA
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@@ -42,6 +58,14 @@
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PIN_FIELD_CALC(_s_pin, _e_pin, 0, _s_addr, _x_addrs, _s_bit, \
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_x_bits, 32, 1)
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+#define PIN_RSEL(_s_pin, _e_pin, _rsel_index, _up_resl, _down_rsel) { \
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+ .s_pin = _s_pin, \
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+ .e_pin = _e_pin, \
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+ .rsel_index = _rsel_index, \
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+ .up_rsel = _up_resl, \
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+ .down_rsel = _down_rsel, \
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+ }
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+
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/* List these attributes which could be modified for the pin */
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enum {
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PINCTRL_PIN_REG_MODE,
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@@ -67,6 +91,7 @@ enum {
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PINCTRL_PIN_REG_DRV_E0,
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PINCTRL_PIN_REG_DRV_E1,
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PINCTRL_PIN_REG_DRV_ADV,
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+ PINCTRL_PIN_REG_RSEL,
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PINCTRL_PIN_REG_MAX,
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};
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@@ -129,6 +154,22 @@ struct mtk_pin_field_calc {
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u8 fixed;
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};
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+/**
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+ * struct mtk_pin_rsel - the structure that provides bias resistance selection.
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+ * @s_pin: the start pin within the rsel range
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+ * @e_pin: the end pin within the rsel range
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+ * @rsel_index: the rsel bias resistance index
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+ * @up_rsel: the pullup rsel bias resistance value
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+ * @down_rsel: the pulldown rsel bias resistance value
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+ */
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+struct mtk_pin_rsel {
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+ u16 s_pin;
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+ u16 e_pin;
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+ u16 rsel_index;
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+ u32 up_rsel;
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+ u32 down_rsel;
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+};
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+
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/* struct mtk_pin_reg_calc - the structure that holds all ranges used to
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* determine which register the pin would make use of
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* for certain pin attribute.
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@@ -206,6 +247,9 @@ struct mtk_pin_soc {
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bool ies_present;
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const char * const *base_names;
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unsigned int nbase_names;
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+ const unsigned int *pull_type;
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+ const struct mtk_pin_rsel *pin_rsel;
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+ unsigned int npin_rsel;
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/* Specific pinconfig operations */
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int (*bias_disable_set)(struct mtk_pinctrl *hw,
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@@ -254,6 +298,8 @@ struct mtk_pinctrl {
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const char **grp_names;
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/* lock pin's register resource to avoid multiple threads issue*/
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spinlock_t lock;
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+ /* identify rsel setting by si unit or rsel define in dts node */
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+ bool rsel_si_unit;
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};
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void mtk_rmw(struct mtk_pinctrl *pctl, u8 i, u32 reg, u32 mask, u32 set);
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--- a/drivers/pinctrl/mediatek/pinctrl-paris.c
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+++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
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@@ -538,8 +538,9 @@ static int mtk_hw_get_value_wrap(struct
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ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw,
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unsigned int gpio, char *buf, unsigned int buf_len)
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{
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- int pinmux, pullup = 0, pullen = 0, len = 0, r1 = -1, r0 = -1;
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+ int pinmux, pullup = 0, pullen = 0, len = 0, r1 = -1, r0 = -1, rsel = -1;
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const struct mtk_pin_desc *desc;
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+ u32 try_all_type;
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if (gpio >= hw->soc->npins)
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return -EINVAL;
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@@ -553,24 +554,39 @@ ssize_t mtk_pctrl_show_one_pin(struct mt
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pinmux -= hw->soc->nfuncs;
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mtk_pinconf_bias_get_combo(hw, desc, &pullup, &pullen);
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- if (pullen == MTK_PUPD_SET_R1R0_00) {
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- pullen = 0;
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- r1 = 0;
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- r0 = 0;
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- } else if (pullen == MTK_PUPD_SET_R1R0_01) {
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- pullen = 1;
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- r1 = 0;
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- r0 = 1;
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- } else if (pullen == MTK_PUPD_SET_R1R0_10) {
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- pullen = 1;
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- r1 = 1;
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- r0 = 0;
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- } else if (pullen == MTK_PUPD_SET_R1R0_11) {
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+
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+ if (hw->soc->pull_type)
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+ try_all_type = hw->soc->pull_type[desc->number];
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+
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+ if (hw->rsel_si_unit && (try_all_type & MTK_PULL_RSEL_TYPE)) {
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+ rsel = pullen;
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pullen = 1;
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- r1 = 1;
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- r0 = 1;
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- } else if (pullen != MTK_DISABLE && pullen != MTK_ENABLE) {
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- pullen = 0;
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+ } else {
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+ /* Case for: R1R0 */
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+ if (pullen == MTK_PUPD_SET_R1R0_00) {
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+ pullen = 0;
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+ r1 = 0;
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+ r0 = 0;
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+ } else if (pullen == MTK_PUPD_SET_R1R0_01) {
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+ pullen = 1;
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+ r1 = 0;
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+ r0 = 1;
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+ } else if (pullen == MTK_PUPD_SET_R1R0_10) {
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+ pullen = 1;
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+ r1 = 1;
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+ r0 = 0;
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+ } else if (pullen == MTK_PUPD_SET_R1R0_11) {
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+ pullen = 1;
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+ r1 = 1;
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+ r0 = 1;
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+ }
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+
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+ /* Case for: RSEL */
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+ if (pullen >= MTK_PULL_SET_RSEL_000 &&
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+ pullen <= MTK_PULL_SET_RSEL_111) {
|
|
+ rsel = pullen - MTK_PULL_SET_RSEL_000;
|
|
+ pullen = 1;
|
|
+ }
|
|
}
|
|
len += scnprintf(buf + len, buf_len - len,
|
|
"%03d: %1d%1d%1d%1d%02d%1d%1d%1d%1d",
|
|
@@ -588,6 +604,8 @@ ssize_t mtk_pctrl_show_one_pin(struct mt
|
|
if (r1 != -1) {
|
|
len += scnprintf(buf + len, buf_len - len, " (%1d %1d)\n",
|
|
r1, r0);
|
|
+ } else if (rsel != -1) {
|
|
+ len += scnprintf(buf + len, buf_len - len, " (%1d)\n", rsel);
|
|
} else {
|
|
len += scnprintf(buf + len, buf_len - len, "\n");
|
|
}
|
|
@@ -930,6 +948,12 @@ int mtk_paris_pinctrl_probe(struct platf
|
|
|
|
hw->nbase = hw->soc->nbase_names;
|
|
|
|
+ if (of_find_property(hw->dev->of_node,
|
|
+ "mediatek,rsel_resistance_in_si_unit", NULL))
|
|
+ hw->rsel_si_unit = true;
|
|
+ else
|
|
+ hw->rsel_si_unit = false;
|
|
+
|
|
spin_lock_init(&hw->lock);
|
|
|
|
err = mtk_pctrl_build_state(pdev);
|