add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/pwm/pwm-hibvt.c
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@@ -1,20 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * PWM Controller Driver for HiSilicon BVT SoCs
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  *
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  * Copyright (c) 2016 HiSilicon Technologies Co., Ltd.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program. If not, see <http://www.gnu.org/licenses/>.
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  */
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 #include <linux/bitops.h>
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@@ -49,15 +37,30 @@
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 	struct clk *clk;
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 	void __iomem *base;
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 	struct reset_control *rstc;
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+	const struct hibvt_pwm_soc *soc;
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 };
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 struct hibvt_pwm_soc {
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 	u32 num_pwms;
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+	bool quirk_force_enable;
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 };
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-static const struct hibvt_pwm_soc pwm_soc[2] = {
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-	{ .num_pwms = 4 },
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-	{ .num_pwms = 8 },
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+static const struct hibvt_pwm_soc hi3516cv300_soc_info = {
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+	.num_pwms = 4,
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+};
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+
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+static const struct hibvt_pwm_soc hi3519v100_soc_info = {
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+	.num_pwms = 8,
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+};
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+
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+static const struct hibvt_pwm_soc hi3559v100_shub_soc_info = {
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+	.num_pwms = 8,
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+	.quirk_force_enable = true,
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+};
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+
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+static const struct hibvt_pwm_soc hi3559v100_soc_info = {
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+	.num_pwms = 2,
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+	.quirk_force_enable = true,
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 };
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 static inline struct hibvt_pwm_chip *to_hibvt_pwm_chip(struct pwm_chip *chip)
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@@ -143,17 +146,28 @@
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 	value = readl(base + PWM_CTRL_ADDR(pwm->hwpwm));
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 	state->enabled = (PWM_ENABLE_MASK & value);
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+	state->polarity = (PWM_POLARITY_MASK & value) ? PWM_POLARITY_INVERSED : PWM_POLARITY_NORMAL;
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 }
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 static int hibvt_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
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-				struct pwm_state *state)
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+			   const struct pwm_state *state)
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 {
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+	struct hibvt_pwm_chip *hi_pwm_chip = to_hibvt_pwm_chip(chip);
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+
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 	if (state->polarity != pwm->state.polarity)
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 		hibvt_pwm_set_polarity(chip, pwm, state->polarity);
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 	if (state->period != pwm->state.period ||
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-		state->duty_cycle != pwm->state.duty_cycle)
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+	    state->duty_cycle != pwm->state.duty_cycle) {
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 		hibvt_pwm_config(chip, pwm, state->duty_cycle, state->period);
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+
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+		/*
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+		 * Some implementations require the PWM to be enabled twice
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+		 * each time the duty cycle is refreshed.
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+		 */
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+		if (hi_pwm_chip->soc->quirk_force_enable && state->enabled)
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+			hibvt_pwm_enable(chip, pwm);
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+	}
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 	if (state->enabled != pwm->state.enabled) {
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 		if (state->enabled)
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@@ -198,6 +212,7 @@
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 	pwm_chip->chip.npwm = soc->num_pwms;
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 	pwm_chip->chip.of_xlate = of_pwm_xlate_with_flags;
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 	pwm_chip->chip.of_pwm_n_cells = 3;
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+	pwm_chip->soc = soc;
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 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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 	pwm_chip->base = devm_ioremap_resource(&pdev->dev, res);
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@@ -250,8 +265,14 @@
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 }
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 static const struct of_device_id hibvt_pwm_of_match[] = {
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-	{ .compatible = "hisilicon,hi3516cv300-pwm", .data = &pwm_soc[0] },
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-	{ .compatible = "hisilicon,hi3519v100-pwm", .data = &pwm_soc[1] },
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+	{ .compatible = "hisilicon,hi3516cv300-pwm",
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+	  .data = &hi3516cv300_soc_info },
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+	{ .compatible = "hisilicon,hi3519v100-pwm",
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+	  .data = &hi3519v100_soc_info },
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+	{ .compatible = "hisilicon,hi3559v100-shub-pwm",
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+	  .data = &hi3559v100_shub_soc_info },
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+	{ .compatible = "hisilicon,hi3559v100-pwm",
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+	  .data = &hi3559v100_soc_info },
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 	{  }
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 };
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 MODULE_DEVICE_TABLE(of, hibvt_pwm_of_match);