diff options
Diffstat (limited to 'target/linux/ramips/patches-4.14/0052-pwm-add-mediatek-support.patch')
| -rw-r--r-- | target/linux/ramips/patches-4.14/0052-pwm-add-mediatek-support.patch | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/target/linux/ramips/patches-4.14/0052-pwm-add-mediatek-support.patch b/target/linux/ramips/patches-4.14/0052-pwm-add-mediatek-support.patch deleted file mode 100644 index 6eb7f16b9d..0000000000 --- a/target/linux/ramips/patches-4.14/0052-pwm-add-mediatek-support.patch +++ /dev/null @@ -1,217 +0,0 @@ -From fc8f96309c21c1bc3276427309cd7d361347d66e Mon Sep 17 00:00:00 2001 -From: John Crispin <blogic@openwrt.org> -Date: Mon, 7 Dec 2015 17:16:50 +0100 -Subject: [PATCH 52/53] pwm: add mediatek support - -Signed-off-by: John Crispin <blogic@openwrt.org> ---- - drivers/pwm/Kconfig | 9 +++ - drivers/pwm/Makefile | 1 + - drivers/pwm/pwm-mediatek.c | 173 ++++++++++++++++++++++++++++++++++++++++++++ - 3 files changed, 183 insertions(+) - create mode 100644 drivers/pwm/pwm-mediatek.c - ---- a/drivers/pwm/Kconfig -+++ b/drivers/pwm/Kconfig -@@ -302,6 +302,15 @@ config PWM_MEDIATEK - To compile this driver as a module, choose M here: the module - will be called pwm-mediatek. - -+config PWM_MEDIATEK_RAMIPS -+ tristate "Mediatek PWM support" -+ depends on RALINK && OF -+ help -+ Generic PWM framework driver for Mediatek ARM SoC. -+ -+ To compile this driver as a module, choose M here: the module -+ will be called pwm-mxs. -+ - config PWM_MXS - tristate "Freescale MXS PWM support" - depends on ARCH_MXS && OF ---- a/drivers/pwm/Makefile -+++ b/drivers/pwm/Makefile -@@ -28,6 +28,7 @@ obj-$(CONFIG_PWM_LPSS_PCI) += pwm-lpss-p - obj-$(CONFIG_PWM_LPSS_PLATFORM) += pwm-lpss-platform.o - obj-$(CONFIG_PWM_MESON) += pwm-meson.o - obj-$(CONFIG_PWM_MEDIATEK) += pwm-mediatek.o -+obj-$(CONFIG_PWM_MEDIATEK_RAMIPS) += pwm-mediatek-ramips.o - obj-$(CONFIG_PWM_MTK_DISP) += pwm-mtk-disp.o - obj-$(CONFIG_PWM_MXS) += pwm-mxs.o - obj-$(CONFIG_PWM_OMAP_DMTIMER) += pwm-omap-dmtimer.o ---- /dev/null -+++ b/drivers/pwm/pwm-mediatek-ramips.c -@@ -0,0 +1,173 @@ -+/* -+ * Mediatek Pulse Width Modulator driver -+ * -+ * Copyright (C) 2015 John Crispin <blogic@openwrt.org> -+ * -+ * This file is licensed under the terms of the GNU General Public -+ * License version 2. This program is licensed "as is" without any -+ * warranty of any kind, whether express or implied. -+ */ -+ -+#include <linux/err.h> -+#include <linux/io.h> -+#include <linux/ioport.h> -+#include <linux/kernel.h> -+#include <linux/module.h> -+#include <linux/of.h> -+#include <linux/platform_device.h> -+#include <linux/pwm.h> -+#include <linux/slab.h> -+#include <linux/types.h> -+ -+#define NUM_PWM 4 -+ -+/* PWM registers and bits definitions */ -+#define PWMCON 0x00 -+#define PWMHDUR 0x04 -+#define PWMLDUR 0x08 -+#define PWMGDUR 0x0c -+#define PWMWAVENUM 0x28 -+#define PWMDWIDTH 0x2c -+#define PWMTHRES 0x30 -+ -+/** -+ * struct mtk_pwm_chip - struct representing pwm chip -+ * -+ * @mmio_base: base address of pwm chip -+ * @chip: linux pwm chip representation -+ */ -+struct mtk_pwm_chip { -+ void __iomem *mmio_base; -+ struct pwm_chip chip; -+}; -+ -+static inline struct mtk_pwm_chip *to_mtk_pwm_chip(struct pwm_chip *chip) -+{ -+ return container_of(chip, struct mtk_pwm_chip, chip); -+} -+ -+static inline u32 mtk_pwm_readl(struct mtk_pwm_chip *chip, unsigned int num, -+ unsigned long offset) -+{ -+ return ioread32(chip->mmio_base + 0x10 + (num * 0x40) + offset); -+} -+ -+static inline void mtk_pwm_writel(struct mtk_pwm_chip *chip, -+ unsigned int num, unsigned long offset, -+ unsigned long val) -+{ -+ iowrite32(val, chip->mmio_base + 0x10 + (num * 0x40) + offset); -+} -+ -+static int mtk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, -+ int duty_ns, int period_ns) -+{ -+ struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip); -+ u32 resolution = 100 / 4; -+ u32 clkdiv = 0; -+ -+ while (period_ns / resolution > 8191) { -+ clkdiv++; -+ resolution *= 2; -+ } -+ -+ if (clkdiv > 7) -+ return -1; -+ -+ mtk_pwm_writel(pc, pwm->hwpwm, PWMCON, BIT(15) | BIT(3) | clkdiv); -+ mtk_pwm_writel(pc, pwm->hwpwm, PWMDWIDTH, period_ns / resolution); -+ mtk_pwm_writel(pc, pwm->hwpwm, PWMTHRES, duty_ns / resolution); -+ return 0; -+} -+ -+static int mtk_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm) -+{ -+ struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip); -+ u32 val; -+ -+ val = ioread32(pc->mmio_base); -+ val |= BIT(pwm->hwpwm); -+ iowrite32(val, pc->mmio_base); -+ -+ return 0; -+} -+ -+static void mtk_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) -+{ -+ struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip); -+ u32 val; -+ -+ val = ioread32(pc->mmio_base); -+ val &= ~BIT(pwm->hwpwm); -+ iowrite32(val, pc->mmio_base); -+} -+ -+static const struct pwm_ops mtk_pwm_ops = { -+ .config = mtk_pwm_config, -+ .enable = mtk_pwm_enable, -+ .disable = mtk_pwm_disable, -+ .owner = THIS_MODULE, -+}; -+ -+static int mtk_pwm_probe(struct platform_device *pdev) -+{ -+ struct mtk_pwm_chip *pc; -+ struct resource *r; -+ int ret; -+ -+ pc = devm_kzalloc(&pdev->dev, sizeof(*pc), GFP_KERNEL); -+ if (!pc) -+ return -ENOMEM; -+ -+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0); -+ pc->mmio_base = devm_ioremap_resource(&pdev->dev, r); -+ if (IS_ERR(pc->mmio_base)) -+ return PTR_ERR(pc->mmio_base); -+ -+ platform_set_drvdata(pdev, pc); -+ -+ pc->chip.dev = &pdev->dev; -+ pc->chip.ops = &mtk_pwm_ops; -+ pc->chip.base = -1; -+ pc->chip.npwm = NUM_PWM; -+ -+ ret = pwmchip_add(&pc->chip); -+ if (ret < 0) -+ dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret); -+ -+ return ret; -+} -+ -+static int mtk_pwm_remove(struct platform_device *pdev) -+{ -+ struct mtk_pwm_chip *pc = platform_get_drvdata(pdev); -+ int i; -+ -+ for (i = 0; i < NUM_PWM; i++) -+ pwm_disable(&pc->chip.pwms[i]); -+ -+ return pwmchip_remove(&pc->chip); -+} -+ -+static const struct of_device_id mtk_pwm_of_match[] = { -+ { .compatible = "mediatek,mt7628-pwm" }, -+ { } -+}; -+ -+MODULE_DEVICE_TABLE(of, mtk_pwm_of_match); -+ -+static struct platform_driver mtk_pwm_driver = { -+ .driver = { -+ .name = "mtk-pwm", -+ .owner = THIS_MODULE, -+ .of_match_table = mtk_pwm_of_match, -+ }, -+ .probe = mtk_pwm_probe, -+ .remove = mtk_pwm_remove, -+}; -+ -+module_platform_driver(mtk_pwm_driver); -+ -+MODULE_LICENSE("GPL"); -+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>"); -+MODULE_ALIAS("platform:mtk-pwm"); |