diff options
Diffstat (limited to 'target/linux/sunxi/patches-3.12/140-add-a31-reset-driver.patch')
| -rw-r--r-- | target/linux/sunxi/patches-3.12/140-add-a31-reset-driver.patch | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/target/linux/sunxi/patches-3.12/140-add-a31-reset-driver.patch b/target/linux/sunxi/patches-3.12/140-add-a31-reset-driver.patch deleted file mode 100644 index 3d48a5fa1f..0000000000 --- a/target/linux/sunxi/patches-3.12/140-add-a31-reset-driver.patch +++ /dev/null @@ -1,189 +0,0 @@ -From d8d7a5805579db687fdfdfda4125b43d6a50e616 Mon Sep 17 00:00:00 2001 -From: Maxime Ripard <maxime.ripard@free-electrons.com> -Date: Tue, 24 Sep 2013 11:07:43 +0300 -Subject: [PATCH] reset: Add Allwinner A31 Reset Controller Driver - -The Allwinner A31 has an IP maintaining a few other IPs in the SoC in -reset by default. Among these IPs are the High Speed Timers, hence why -we can't use the regular driver construct, and need to call the -registering function directly during machine initialisation. - -Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> ---- - drivers/reset/Makefile | 1 + - drivers/reset/reset-sunxi.c | 156 ++++++++++++++++++++++++++++++++++++++++++++ - 2 files changed, 157 insertions(+) - create mode 100644 drivers/reset/reset-sunxi.c - -diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile -index 1e2d83f..f216b74 100644 ---- a/drivers/reset/Makefile -+++ b/drivers/reset/Makefile -@@ -1 +1,2 @@ - obj-$(CONFIG_RESET_CONTROLLER) += core.o -+obj-$(CONFIG_ARCH_SUNXI) += reset-sun6i.o -diff --git a/drivers/reset/reset-sunxi.c b/drivers/reset/reset-sunxi.c -new file mode 100644 -index 0000000..5bbd59a ---- /dev/null -+++ b/drivers/reset/reset-sunxi.c -@@ -0,0 +1,156 @@ -+/* -+ * Allwinner SoCs Reset Controller driver -+ * -+ * Copyright 2013 Maxime Ripard -+ * -+ * Maxime Ripard <maxime.ripard@free-electrons.com> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ */ -+ -+#include <linux/err.h> -+#include <linux/io.h> -+#include <linux/module.h> -+#include <linux/of.h> -+#include <linux/of_address.h> -+#include <linux/platform_device.h> -+#include <linux/reset-controller.h> -+#include <linux/slab.h> -+#include <linux/types.h> -+ -+struct sunxi_reset_data { -+ void __iomem *membase; -+ struct reset_controller_dev rcdev; -+}; -+ -+static int sunxi_reset_assert(struct reset_controller_dev *rcdev, -+ unsigned long id) -+{ -+ struct sunxi_reset_data *data = container_of(rcdev, -+ struct sunxi_reset_data, -+ rcdev); -+ int bank = id / BITS_PER_LONG; -+ int offset = id % BITS_PER_LONG; -+ u32 reg = readl(data->membase + (bank * 4)); -+ -+ writel(reg & ~BIT(offset), data->membase + (bank * 4)); -+ -+ return 0; -+} -+ -+static int sunxi_reset_deassert(struct reset_controller_dev *rcdev, -+ unsigned long id) -+{ -+ struct sunxi_reset_data *data = container_of(rcdev, -+ struct sunxi_reset_data, -+ rcdev); -+ int bank = id / BITS_PER_LONG; -+ int offset = id % BITS_PER_LONG; -+ u32 reg = readl(data->membase + (bank * 4)); -+ -+ writel(reg | BIT(offset), data->membase + (bank * 4)); -+ -+ return 0; -+} -+ -+static struct reset_control_ops sunxi_reset_ops = { -+ .assert = sunxi_reset_assert, -+ .deassert = sunxi_reset_deassert, -+}; -+ -+static int sunxi_reset_init(struct device_node *np) -+{ -+ struct sunxi_reset_data *data; -+ struct resource res; -+ resource_size_t size; -+ int ret; -+ -+ data = kzalloc(sizeof(*data), GFP_KERNEL); -+ if (!data) -+ return -ENOMEM; -+ -+ ret = of_address_to_resource(np, 0, &res); -+ if (ret) -+ goto err_alloc; -+ -+ size = resource_size(&res); -+ data->membase = ioremap(res.start, size); -+ if (!data->membase) { -+ ret = -ENOMEM; -+ goto err_alloc; -+ } -+ -+ data->rcdev.owner = THIS_MODULE; -+ data->rcdev.nr_resets = size * 32; -+ data->rcdev.ops = &sunxi_reset_ops; -+ data->rcdev.of_node = np; -+ reset_controller_register(&data->rcdev); -+ -+ return 0; -+ -+err_alloc: -+ kfree(data); -+ return ret; -+}; -+ -+/* -+ * These are the reset controller we need to initialize early on in -+ * our system, before we can even think of using a regular device -+ * driver for it. -+ */ -+static const struct of_device_id sunxi_early_reset_dt_ids[] __initdata = { -+ { .compatible = "allwinner,sun6i-a31-ahb1-reset", }, -+ { /* sentinel */ }, -+}; -+ -+void __init sun6i_reset_init(void) -+{ -+ struct device_node *np; -+ -+ for_each_matching_node(np, sunxi_early_reset_dt_ids) -+ sunxi_reset_init(np); -+} -+ -+/* -+ * And these are the controllers we can register through the regular -+ * device model. -+ */ -+static const struct of_device_id sunxi_reset_dt_ids[] = { -+ { .compatible = "allwinner,sun4i-clock-reset", }, -+ { /* sentinel */ }, -+}; -+MODULE_DEVICE_TABLE(of, sunxi_reset_dt_ids); -+ -+static int sunxi_reset_probe(struct platform_device *pdev) -+{ -+ return sunxi_reset_init(pdev->dev.of_node); -+} -+ -+static int sunxi_reset_remove(struct platform_device *pdev) -+{ -+ struct sunxi_reset_data *data = platform_get_drvdata(pdev); -+ -+ reset_controller_unregister(&data->rcdev); -+ iounmap(data->membase); -+ kfree(data); -+ -+ return 0; -+} -+ -+static struct platform_driver sunxi_reset_driver = { -+ .probe = sunxi_reset_probe, -+ .remove = sunxi_reset_remove, -+ .driver = { -+ .name = "sunxi-reset", -+ .owner = THIS_MODULE, -+ .of_match_table = sunxi_reset_dt_ids, -+ }, -+}; -+module_platform_driver(sunxi_reset_driver); -+ -+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com"); -+MODULE_DESCRIPTION("Allwinner SoCs Reset Controller Driver"); -+MODULE_LICENSE("GPL"); --- -1.8.4 - |