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-rw-r--r--target/linux/mediatek/patches/0028-pwm-add-Mediatek-display-PWM-driver-support.patch271
1 files changed, 0 insertions, 271 deletions
diff --git a/target/linux/mediatek/patches/0028-pwm-add-Mediatek-display-PWM-driver-support.patch b/target/linux/mediatek/patches/0028-pwm-add-Mediatek-display-PWM-driver-support.patch
deleted file mode 100644
index c2f75a3f71..0000000000
--- a/target/linux/mediatek/patches/0028-pwm-add-Mediatek-display-PWM-driver-support.patch
+++ /dev/null
@@ -1,271 +0,0 @@
-From 77e664940f6daa86965d16a2047188519341a31a Mon Sep 17 00:00:00 2001
-From: YH Huang <yh.huang@mediatek.com>
-Date: Mon, 11 May 2015 17:26:22 +0800
-Subject: [PATCH 28/76] pwm: add Mediatek display PWM driver support
-
-Add display PWM driver support to modify backlight for MT8173/MT6595.
-
-Signed-off-by: YH Huang <yh.huang@mediatek.com>
----
- drivers/pwm/Kconfig | 9 ++
- drivers/pwm/Makefile | 1 +
- drivers/pwm/pwm-disp-mediatek.c | 225 +++++++++++++++++++++++++++++++++++++++
- 3 files changed, 235 insertions(+)
- create mode 100644 drivers/pwm/pwm-disp-mediatek.c
-
---- a/drivers/pwm/Kconfig
-+++ b/drivers/pwm/Kconfig
-@@ -111,6 +111,15 @@ config PWM_CLPS711X
- To compile this driver as a module, choose M here: the module
- will be called pwm-clps711x.
-
-+config PWM_DISP_MEDIATEK
-+ tristate "MEDIATEK display PWM driver"
-+ depends on OF
-+ help
-+ Generic PWM framework driver for mediatek disp-pwm device.
-+
-+ To compile this driver as a module, choose M here: the module
-+ will be called pwm-disp-mediatek.
-+
- config PWM_EP93XX
- tristate "Cirrus Logic EP93xx PWM support"
- depends on ARCH_EP93XX
---- a/drivers/pwm/Makefile
-+++ b/drivers/pwm/Makefile
-@@ -8,6 +8,7 @@ obj-$(CONFIG_PWM_BCM_KONA) += pwm-bcm-ko
- obj-$(CONFIG_PWM_BCM2835) += pwm-bcm2835.o
- obj-$(CONFIG_PWM_BFIN) += pwm-bfin.o
- obj-$(CONFIG_PWM_CLPS711X) += pwm-clps711x.o
-+obj-$(CONFIG_PWM_DISP_MEDIATEK) += pwm-disp-mediatek.o
- obj-$(CONFIG_PWM_EP93XX) += pwm-ep93xx.o
- obj-$(CONFIG_PWM_FSL_FTM) += pwm-fsl-ftm.o
- obj-$(CONFIG_PWM_IMG) += pwm-img.o
---- /dev/null
-+++ b/drivers/pwm/pwm-disp-mediatek.c
-@@ -0,0 +1,225 @@
-+/*
-+ * Mediatek display pulse-width-modulation controller driver.
-+ * Copyright (c) 2015 MediaTek Inc.
-+ * Author: YH Huang <yh.huang@mediatek.com>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ */
-+
-+#include <linux/clk.h>
-+#include <linux/err.h>
-+#include <linux/io.h>
-+#include <linux/module.h>
-+#include <linux/of.h>
-+#include <linux/pwm.h>
-+#include <linux/platform_device.h>
-+#include <linux/slab.h>
-+
-+#define DISP_PWM_EN_OFF (0x0)
-+#define PWM_ENABLE_SHIFT (0x0)
-+#define PWM_ENABLE_MASK (0x1 << PWM_ENABLE_SHIFT)
-+
-+#define DISP_PWM_COMMIT_OFF (0x08)
-+#define PWM_COMMIT_SHIFT (0x0)
-+#define PWM_COMMIT_MASK (0x1 << PWM_COMMIT_SHIFT)
-+
-+#define DISP_PWM_CON_0_OFF (0x10)
-+#define PWM_CLKDIV_SHIFT (0x10)
-+#define PWM_CLKDIV_MASK (0x3ff << PWM_CLKDIV_SHIFT)
-+#define PWM_CLKDIV_MAX (0x000003ff)
-+
-+#define DISP_PWM_CON_1_OFF (0x14)
-+#define PWM_PERIOD_SHIFT (0x0)
-+#define PWM_PERIOD_MASK (0xfff << PWM_PERIOD_SHIFT)
-+#define PWM_PERIOD_MAX (0x00000fff)
-+/* Shift log2(PWM_PERIOD_MAX + 1) as divisor */
-+#define PWM_PERIOD_BIT_SHIFT 12
-+
-+#define PWM_HIGH_WIDTH_SHIFT (0x10)
-+#define PWM_HIGH_WIDTH_MASK (0x1fff << PWM_HIGH_WIDTH_SHIFT)
-+
-+#define NUM_PWM 1
-+
-+struct mtk_disp_pwm_chip {
-+ struct pwm_chip chip;
-+ struct device *dev;
-+ struct clk *clk_main;
-+ struct clk *clk_mm;
-+ void __iomem *mmio_base;
-+};
-+
-+static void mtk_disp_pwm_setting(void __iomem *address, u32 value, u32 mask)
-+{
-+ u32 val;
-+
-+ val = readl(address);
-+ val &= ~mask;
-+ val |= value;
-+ writel(val, address);
-+}
-+
-+static int mtk_disp_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
-+ int duty_ns, int period_ns)
-+{
-+ struct mtk_disp_pwm_chip *mpc;
-+ u64 div, rate;
-+ u32 clk_div, period, high_width, rem;
-+
-+ /*
-+ * Find period, high_width and clk_div to suit duty_ns and period_ns.
-+ * Calculate proper div value to keep period value in the bound.
-+ *
-+ * period_ns = 10^9 * (clk_div + 1) * (period +1) / PWM_CLK_RATE
-+ * duty_ns = 10^9 * (clk_div + 1) * (high_width + 1) / PWM_CLK_RATE
-+ *
-+ * period = (PWM_CLK_RATE * period_ns) / (10^9 * (clk_div + 1)) - 1
-+ * high_width = (PWM_CLK_RATE * duty_ns) / (10^9 * (clk_div + 1)) - 1
-+ */
-+ mpc = container_of(chip, struct mtk_disp_pwm_chip, chip);
-+ rate = clk_get_rate(mpc->clk_main);
-+ clk_div = div_u64_rem(rate * period_ns, NSEC_PER_SEC, &rem) >>
-+ PWM_PERIOD_BIT_SHIFT;
-+ if (clk_div > PWM_CLKDIV_MAX)
-+ return -EINVAL;
-+
-+ div = clk_div + 1;
-+ period = div64_u64(rate * period_ns, NSEC_PER_SEC * div);
-+ if (period > 0)
-+ period--;
-+ high_width = div64_u64(rate * duty_ns, NSEC_PER_SEC * div);
-+ if (high_width > 0)
-+ high_width--;
-+
-+ mtk_disp_pwm_setting(mpc->mmio_base + DISP_PWM_CON_0_OFF,
-+ clk_div << PWM_CLKDIV_SHIFT, PWM_CLKDIV_MASK);
-+ mtk_disp_pwm_setting(mpc->mmio_base + DISP_PWM_CON_1_OFF,
-+ (period << PWM_PERIOD_SHIFT) |
-+ (high_width << PWM_HIGH_WIDTH_SHIFT),
-+ PWM_PERIOD_MASK | PWM_HIGH_WIDTH_MASK);
-+
-+ mtk_disp_pwm_setting(mpc->mmio_base + DISP_PWM_COMMIT_OFF,
-+ 1 << PWM_COMMIT_SHIFT, PWM_COMMIT_MASK);
-+ mtk_disp_pwm_setting(mpc->mmio_base + DISP_PWM_COMMIT_OFF,
-+ 0 << PWM_COMMIT_SHIFT, PWM_COMMIT_MASK);
-+
-+ return 0;
-+}
-+
-+static int mtk_disp_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
-+{
-+ struct mtk_disp_pwm_chip *mpc;
-+
-+ mpc = container_of(chip, struct mtk_disp_pwm_chip, chip);
-+ mtk_disp_pwm_setting(mpc->mmio_base + DISP_PWM_EN_OFF,
-+ 1 << PWM_ENABLE_SHIFT, PWM_ENABLE_MASK);
-+
-+ return 0;
-+}
-+
-+static void mtk_disp_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
-+{
-+ struct mtk_disp_pwm_chip *mpc;
-+
-+ mpc = container_of(chip, struct mtk_disp_pwm_chip, chip);
-+ mtk_disp_pwm_setting(mpc->mmio_base + DISP_PWM_EN_OFF,
-+ 0 << PWM_ENABLE_SHIFT, PWM_ENABLE_MASK);
-+}
-+
-+static const struct pwm_ops mtk_disp_pwm_ops = {
-+ .config = mtk_disp_pwm_config,
-+ .enable = mtk_disp_pwm_enable,
-+ .disable = mtk_disp_pwm_disable,
-+ .owner = THIS_MODULE,
-+};
-+
-+static int mtk_disp_pwm_probe(struct platform_device *pdev)
-+{
-+ struct mtk_disp_pwm_chip *pwm;
-+ struct resource *r;
-+ int ret;
-+
-+ pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL);
-+ if (!pwm)
-+ return -ENOMEM;
-+
-+ pwm->dev = &pdev->dev;
-+
-+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ pwm->mmio_base = devm_ioremap_resource(&pdev->dev, r);
-+ if (IS_ERR(pwm->mmio_base))
-+ return PTR_ERR(pwm->mmio_base);
-+
-+ pwm->clk_main = devm_clk_get(&pdev->dev, "main");
-+ if (IS_ERR(pwm->clk_main))
-+ return PTR_ERR(pwm->clk_main);
-+ pwm->clk_mm = devm_clk_get(&pdev->dev, "mm");
-+ if (IS_ERR(pwm->clk_mm))
-+ return PTR_ERR(pwm->clk_mm);
-+
-+ ret = clk_prepare_enable(pwm->clk_main);
-+ if (ret < 0)
-+ return ret;
-+ ret = clk_prepare_enable(pwm->clk_mm);
-+ if (ret < 0) {
-+ clk_disable_unprepare(pwm->clk_main);
-+ return ret;
-+ }
-+
-+ platform_set_drvdata(pdev, pwm);
-+
-+ pwm->chip.dev = &pdev->dev;
-+ pwm->chip.ops = &mtk_disp_pwm_ops;
-+ pwm->chip.base = -1;
-+ pwm->chip.npwm = NUM_PWM;
-+
-+ ret = pwmchip_add(&pwm->chip);
-+ if (ret < 0) {
-+ dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret);
-+ return ret;
-+ }
-+
-+ return 0;
-+}
-+
-+static int mtk_disp_pwm_remove(struct platform_device *pdev)
-+{
-+ struct mtk_disp_pwm_chip *pc = platform_get_drvdata(pdev);
-+
-+ if (WARN_ON(!pc))
-+ return -ENODEV;
-+
-+ clk_disable_unprepare(pc->clk_main);
-+ clk_disable_unprepare(pc->clk_mm);
-+
-+ return pwmchip_remove(&pc->chip);
-+}
-+
-+static const struct of_device_id mtk_disp_pwm_of_match[] = {
-+ { .compatible = "mediatek,mt6595-disp-pwm" },
-+ { }
-+};
-+
-+MODULE_DEVICE_TABLE(of, mtk_disp_pwm_of_match);
-+
-+static struct platform_driver mtk_disp_pwm_driver = {
-+ .driver = {
-+ .name = "mediatek-disp-pwm",
-+ .owner = THIS_MODULE,
-+ .of_match_table = mtk_disp_pwm_of_match,
-+ },
-+ .probe = mtk_disp_pwm_probe,
-+ .remove = mtk_disp_pwm_remove,
-+};
-+
-+module_platform_driver(mtk_disp_pwm_driver);
-+
-+MODULE_AUTHOR("YH Huang <yh.huang@mediatek.com>");
-+MODULE_DESCRIPTION("MediaTek SoC display PWM driver");
-+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-11 06:55:48 +0000