summaryrefslogtreecommitdiffstats
path: root/target/linux/xburst/patches-2.6.35/053-adc.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/xburst/patches-2.6.35/053-adc.patch')
-rw-r--r--target/linux/xburst/patches-2.6.35/053-adc.patch476
1 files changed, 0 insertions, 476 deletions
diff --git a/target/linux/xburst/patches-2.6.35/053-adc.patch b/target/linux/xburst/patches-2.6.35/053-adc.patch
deleted file mode 100644
index 9f3912de25..0000000000
--- a/target/linux/xburst/patches-2.6.35/053-adc.patch
+++ /dev/null
@@ -1,476 +0,0 @@
-From ae6e941c5d58262c0a09c355ae384b7109977053 Mon Sep 17 00:00:00 2001
-From: Lars-Peter Clausen <lars@metafoo.de>
-Date: Mon, 12 Jul 2010 03:48:08 +0200
-Subject: [PATCH] mfd: Add JZ4740 ADC driver
-
-This patch adds a MFD driver for the JZ4740 ADC unit. The driver is used to
-demultiplex IRQs and synchronize access to shared registers between the
-battery, hwmon and (future) touchscreen driver.
-
-Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
-Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
----
- drivers/mfd/Kconfig | 8 +
- drivers/mfd/Makefile | 1 +
- drivers/mfd/jz4740-adc.c | 394 ++++++++++++++++++++++++++++++++++++++++++++
- include/linux/jz4740-adc.h | 32 ++++
- 4 files changed, 435 insertions(+), 0 deletions(-)
- create mode 100644 drivers/mfd/jz4740-adc.c
- create mode 100644 include/linux/jz4740-adc.h
-
---- a/drivers/mfd/Kconfig
-+++ b/drivers/mfd/Kconfig
-@@ -482,6 +482,14 @@ config MFD_JANZ_CMODIO
- host many different types of MODULbus daughterboards, including
- CAN and GPIO controllers.
-
-+config MFD_JZ4740_ADC
-+ tristate "Support for the JZ4740 SoC ADC core"
-+ select MFD_CORE
-+ depends on MACH_JZ4740
-+ help
-+ Say yes here if you want support for the ADC unit in the JZ4740 SoC.
-+ This driver is necessary for jz4740-battery and jz4740-hwmon driver.
-+
- endif # MFD_SUPPORT
-
- menu "Multimedia Capabilities Port drivers"
---- a/drivers/mfd/Makefile
-+++ b/drivers/mfd/Makefile
-@@ -71,3 +71,4 @@ obj-$(CONFIG_PMIC_ADP5520) += adp5520.o
- obj-$(CONFIG_LPC_SCH) += lpc_sch.o
- obj-$(CONFIG_MFD_RDC321X) += rdc321x-southbridge.o
- obj-$(CONFIG_MFD_JANZ_CMODIO) += janz-cmodio.o
-+obj-$(CONFIG_MFD_JZ4740_ADC) += jz4740-adc.o
---- /dev/null
-+++ b/drivers/mfd/jz4740-adc.c
-@@ -0,0 +1,394 @@
-+/*
-+ * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
-+ * JZ4740 SoC ADC driver
-+ *
-+ * 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.
-+ *
-+ * You should have received a copy of the GNU General Public License along
-+ * with this program; if not, write to the Free Software Foundation, Inc.,
-+ * 675 Mass Ave, Cambridge, MA 02139, USA.
-+ *
-+ * This driver synchronizes access to the JZ4740 ADC core between the
-+ * JZ4740 battery and hwmon drivers.
-+ */
-+
-+#include <linux/err.h>
-+#include <linux/irq.h>
-+#include <linux/interrupt.h>
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+#include <linux/platform_device.h>
-+#include <linux/slab.h>
-+#include <linux/spinlock.h>
-+
-+#include <linux/clk.h>
-+#include <linux/mfd/core.h>
-+
-+#include <linux/jz4740-adc.h>
-+
-+
-+#define JZ_REG_ADC_ENABLE 0x00
-+#define JZ_REG_ADC_CFG 0x04
-+#define JZ_REG_ADC_CTRL 0x08
-+#define JZ_REG_ADC_STATUS 0x0c
-+
-+#define JZ_REG_ADC_TOUCHSCREEN_BASE 0x10
-+#define JZ_REG_ADC_BATTERY_BASE 0x1c
-+#define JZ_REG_ADC_HWMON_BASE 0x20
-+
-+#define JZ_ADC_ENABLE_TOUCH BIT(2)
-+#define JZ_ADC_ENABLE_BATTERY BIT(1)
-+#define JZ_ADC_ENABLE_ADCIN BIT(0)
-+
-+enum {
-+ JZ_ADC_IRQ_ADCIN = 0,
-+ JZ_ADC_IRQ_BATTERY,
-+ JZ_ADC_IRQ_TOUCH,
-+ JZ_ADC_IRQ_PENUP,
-+ JZ_ADC_IRQ_PENDOWN,
-+};
-+
-+struct jz4740_adc {
-+ struct resource *mem;
-+ void __iomem *base;
-+
-+ int irq;
-+ int irq_base;
-+
-+ struct clk *clk;
-+ atomic_t clk_ref;
-+
-+ spinlock_t lock;
-+};
-+
-+static inline void jz4740_adc_irq_set_masked(struct jz4740_adc *adc, int irq,
-+ bool masked)
-+{
-+ unsigned long flags;
-+ uint8_t val;
-+
-+ irq -= adc->irq_base;
-+
-+ spin_lock_irqsave(&adc->lock, flags);
-+
-+ val = readb(adc->base + JZ_REG_ADC_CTRL);
-+ if (masked)
-+ val |= BIT(irq);
-+ else
-+ val &= ~BIT(irq);
-+ writeb(val, adc->base + JZ_REG_ADC_CTRL);
-+
-+ spin_unlock_irqrestore(&adc->lock, flags);
-+}
-+
-+static void jz4740_adc_irq_mask(unsigned int irq)
-+{
-+ struct jz4740_adc *adc = get_irq_chip_data(irq);
-+ jz4740_adc_irq_set_masked(adc, irq, true);
-+}
-+
-+static void jz4740_adc_irq_unmask(unsigned int irq)
-+{
-+ struct jz4740_adc *adc = get_irq_chip_data(irq);
-+ jz4740_adc_irq_set_masked(adc, irq, false);
-+}
-+
-+static void jz4740_adc_irq_ack(unsigned int irq)
-+{
-+ struct jz4740_adc *adc = get_irq_chip_data(irq);
-+
-+ irq -= adc->irq_base;
-+ writeb(BIT(irq), adc->base + JZ_REG_ADC_STATUS);
-+}
-+
-+static struct irq_chip jz4740_adc_irq_chip = {
-+ .name = "jz4740-adc",
-+ .mask = jz4740_adc_irq_mask,
-+ .unmask = jz4740_adc_irq_unmask,
-+ .ack = jz4740_adc_irq_ack,
-+};
-+
-+static void jz4740_adc_irq_demux(unsigned int irq, struct irq_desc *desc)
-+{
-+ struct jz4740_adc *adc = get_irq_desc_data(desc);
-+ uint8_t status;
-+ unsigned int i;
-+
-+ status = readb(adc->base + JZ_REG_ADC_STATUS);
-+
-+ for (i = 0; i < 5; ++i) {
-+ if (status & BIT(i))
-+ generic_handle_irq(adc->irq_base + i);
-+ }
-+}
-+
-+
-+/* Refcounting for the ADC clock is done in here instead of in the clock
-+ * framework, because it is the only clock which is shared between multiple
-+ * devices and thus is the only clock which needs refcounting */
-+static inline void jz4740_adc_clk_enable(struct jz4740_adc *adc)
-+{
-+ if (atomic_inc_return(&adc->clk_ref) == 1)
-+ clk_enable(adc->clk);
-+}
-+
-+static inline void jz4740_adc_clk_disable(struct jz4740_adc *adc)
-+{
-+ if (atomic_dec_return(&adc->clk_ref) == 0)
-+ clk_disable(adc->clk);
-+}
-+
-+static inline void jz4740_adc_set_enabled(struct jz4740_adc *adc, int engine,
-+ bool enabled)
-+{
-+ unsigned long flags;
-+ uint8_t val;
-+
-+ spin_lock_irqsave(&adc->lock, flags);
-+
-+ val = readb(adc->base + JZ_REG_ADC_ENABLE);
-+ if (enabled)
-+ val |= BIT(engine);
-+ else
-+ val &= BIT(engine);
-+ writeb(val, adc->base + JZ_REG_ADC_ENABLE);
-+
-+ spin_unlock_irqrestore(&adc->lock, flags);
-+}
-+
-+static int jz4740_adc_cell_enable(struct platform_device *pdev)
-+{
-+ struct jz4740_adc *adc = dev_get_drvdata(pdev->dev.parent);
-+
-+ jz4740_adc_clk_enable(adc);
-+ jz4740_adc_set_enabled(adc, pdev->id, true);
-+
-+ return 0;
-+}
-+
-+static int jz4740_adc_cell_disable(struct platform_device *pdev)
-+{
-+ struct jz4740_adc *adc = dev_get_drvdata(pdev->dev.parent);
-+
-+ jz4740_adc_set_enabled(adc, pdev->id, false);
-+ jz4740_adc_clk_disable(adc);
-+
-+ return 0;
-+}
-+
-+int jz4740_adc_set_config(struct device *dev, uint32_t mask, uint32_t val)
-+{
-+ struct jz4740_adc *adc = dev_get_drvdata(dev);
-+ unsigned long flags;
-+ uint32_t cfg;
-+
-+ if (!adc)
-+ return -ENODEV;
-+
-+ spin_lock_irqsave(&adc->lock, flags);
-+
-+ cfg = readl(adc->base + JZ_REG_ADC_CFG);
-+
-+ cfg &= ~mask;
-+ cfg |= val;
-+
-+ writel(cfg, adc->base + JZ_REG_ADC_CFG);
-+
-+ spin_unlock_irqrestore(&adc->lock, flags);
-+
-+ return 0;
-+}
-+EXPORT_SYMBOL_GPL(jz4740_adc_set_config);
-+
-+static struct resource jz4740_hwmon_resources[] = {
-+ {
-+ .start = JZ_ADC_IRQ_ADCIN,
-+ .flags = IORESOURCE_IRQ,
-+ },
-+ {
-+ .start = JZ_REG_ADC_HWMON_BASE,
-+ .end = JZ_REG_ADC_HWMON_BASE + 3,
-+ .flags = IORESOURCE_MEM,
-+ },
-+};
-+
-+static struct resource jz4740_battery_resources[] = {
-+ {
-+ .start = JZ_ADC_IRQ_BATTERY,
-+ .flags = IORESOURCE_IRQ,
-+ },
-+ {
-+ .start = JZ_REG_ADC_BATTERY_BASE,
-+ .end = JZ_REG_ADC_BATTERY_BASE + 3,
-+ .flags = IORESOURCE_MEM,
-+ },
-+};
-+
-+const struct mfd_cell jz4740_adc_cells[] = {
-+ {
-+ .id = 0,
-+ .name = "jz4740-hwmon",
-+ .num_resources = ARRAY_SIZE(jz4740_hwmon_resources),
-+ .resources = jz4740_hwmon_resources,
-+ .platform_data = (void *)&jz4740_adc_cells[0],
-+ .data_size = sizeof(struct mfd_cell),
-+
-+ .enable = jz4740_adc_cell_enable,
-+ .disable = jz4740_adc_cell_disable,
-+ },
-+ {
-+ .id = 1,
-+ .name = "jz4740-battery",
-+ .num_resources = ARRAY_SIZE(jz4740_battery_resources),
-+ .resources = jz4740_battery_resources,
-+ .platform_data = (void *)&jz4740_adc_cells[1],
-+ .data_size = sizeof(struct mfd_cell),
-+
-+ .enable = jz4740_adc_cell_enable,
-+ .disable = jz4740_adc_cell_disable,
-+ },
-+};
-+
-+static int __devinit jz4740_adc_probe(struct platform_device *pdev)
-+{
-+ int ret;
-+ struct jz4740_adc *adc;
-+ struct resource *mem_base;
-+ int irq;
-+
-+ adc = kmalloc(sizeof(*adc), GFP_KERNEL);
-+ if (!adc) {
-+ dev_err(&pdev->dev, "Failed to allocate driver structure\n");
-+ return -ENOMEM;
-+ }
-+
-+ adc->irq = platform_get_irq(pdev, 0);
-+ if (adc->irq < 0) {
-+ ret = adc->irq;
-+ dev_err(&pdev->dev, "Failed to get platform irq: %d\n", ret);
-+ goto err_free;
-+ }
-+
-+ adc->irq_base = platform_get_irq(pdev, 1);
-+ if (adc->irq_base < 0) {
-+ ret = adc->irq_base;
-+ dev_err(&pdev->dev, "Failed to get irq base: %d\n", ret);
-+ goto err_free;
-+ }
-+
-+ mem_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ if (!mem_base) {
-+ ret = -ENOENT;
-+ dev_err(&pdev->dev, "Failed to get platform mmio resource\n");
-+ goto err_free;
-+ }
-+
-+ /* Only request the shared registers for the MFD driver */
-+ adc->mem = request_mem_region(mem_base->start, JZ_REG_ADC_STATUS,
-+ pdev->name);
-+ if (!adc->mem) {
-+ ret = -EBUSY;
-+ dev_err(&pdev->dev, "Failed to request mmio memory region\n");
-+ goto err_free;
-+ }
-+
-+ adc->base = ioremap_nocache(adc->mem->start, resource_size(adc->mem));
-+ if (!adc->base) {
-+ ret = -EBUSY;
-+ dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
-+ goto err_release_mem_region;
-+ }
-+
-+ adc->clk = clk_get(&pdev->dev, "adc");
-+ if (IS_ERR(adc->clk)) {
-+ ret = PTR_ERR(adc->clk);
-+ dev_err(&pdev->dev, "Failed to get clock: %d\n", ret);
-+ goto err_iounmap;
-+ }
-+
-+ spin_lock_init(&adc->lock);
-+ atomic_set(&adc->clk_ref, 0);
-+
-+ platform_set_drvdata(pdev, adc);
-+
-+ for (irq = adc->irq_base; irq < adc->irq_base + 5; ++irq) {
-+ set_irq_chip_data(irq, adc);
-+ set_irq_chip_and_handler(irq, &jz4740_adc_irq_chip,
-+ handle_level_irq);
-+ }
-+
-+ set_irq_data(adc->irq, adc);
-+ set_irq_chained_handler(adc->irq, jz4740_adc_irq_demux);
-+
-+ writeb(0x00, adc->base + JZ_REG_ADC_ENABLE);
-+ writeb(0xff, adc->base + JZ_REG_ADC_CTRL);
-+
-+ ret = mfd_add_devices(&pdev->dev, 0, jz4740_adc_cells,
-+ ARRAY_SIZE(jz4740_adc_cells), mem_base, adc->irq_base);
-+ if (ret < 0)
-+ goto err_clk_put;
-+
-+ return 0;
-+
-+err_clk_put:
-+ clk_put(adc->clk);
-+err_iounmap:
-+ platform_set_drvdata(pdev, NULL);
-+ iounmap(adc->base);
-+err_release_mem_region:
-+ release_mem_region(adc->mem->start, resource_size(adc->mem));
-+err_free:
-+ kfree(adc);
-+
-+ return ret;
-+}
-+
-+static int __devexit jz4740_adc_remove(struct platform_device *pdev)
-+{
-+ struct jz4740_adc *adc = platform_get_drvdata(pdev);
-+
-+ mfd_remove_devices(&pdev->dev);
-+
-+ set_irq_data(adc->irq, NULL);
-+ set_irq_chained_handler(adc->irq, NULL);
-+
-+ iounmap(adc->base);
-+ release_mem_region(adc->mem->start, resource_size(adc->mem));
-+
-+ clk_put(adc->clk);
-+
-+ platform_set_drvdata(pdev, NULL);
-+
-+ kfree(adc);
-+
-+ return 0;
-+}
-+
-+struct platform_driver jz4740_adc_driver = {
-+ .probe = jz4740_adc_probe,
-+ .remove = __devexit_p(jz4740_adc_remove),
-+ .driver = {
-+ .name = "jz4740-adc",
-+ .owner = THIS_MODULE,
-+ },
-+};
-+
-+static int __init jz4740_adc_init(void)
-+{
-+ return platform_driver_register(&jz4740_adc_driver);
-+}
-+module_init(jz4740_adc_init);
-+
-+static void __exit jz4740_adc_exit(void)
-+{
-+ platform_driver_unregister(&jz4740_adc_driver);
-+}
-+module_exit(jz4740_adc_exit);
-+
-+MODULE_DESCRIPTION("JZ4740 SoC ADC driver");
-+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
-+MODULE_LICENSE("GPL");
-+MODULE_ALIAS("platform:jz4740-adc");
---- /dev/null
-+++ b/include/linux/jz4740-adc.h
-@@ -0,0 +1,32 @@
-+
-+#ifndef __LINUX_JZ4740_ADC
-+#define __LINUX_JZ4740_ADC
-+
-+#include <linux/device.h>
-+
-+/*
-+ * jz4740_adc_set_config - Configure a JZ4740 adc device
-+ * @dev: Pointer to a jz4740-adc device
-+ * @mask: Mask for the config value to be set
-+ * @val: Value to be set
-+ *
-+ * This function can be used by the JZ4740 ADC mfd cells to configure their
-+ * options in the shared config register.
-+*/
-+int jz4740_adc_set_config(struct device *dev, uint32_t mask, uint32_t val);
-+
-+#define JZ_ADC_CONFIG_SPZZ BIT(31)
-+#define JZ_ADC_CONFIG_EX_IN BIT(30)
-+#define JZ_ADC_CONFIG_DNUM_MASK (0x7 << 16)
-+#define JZ_ADC_CONFIG_DMA_ENABLE BIT(15)
-+#define JZ_ADC_CONFIG_XYZ_MASK (0x2 << 13)
-+#define JZ_ADC_CONFIG_SAMPLE_NUM_MASK (0x7 << 10)
-+#define JZ_ADC_CONFIG_CLKDIV_MASK (0xf << 5)
-+#define JZ_ADC_CONFIG_BAT_MB BIT(4)
-+
-+#define JZ_ADC_CONFIG_DNUM(dnum) ((dnum) << 16)
-+#define JZ_ADC_CONFIG_XYZ_OFFSET(dnum) ((xyz) << 13)
-+#define JZ_ADC_CONFIG_SAMPLE_NUM(x) ((x) << 10)
-+#define JZ_ADC_CONFIG_CLKDIV(div) ((div) << 5)
-+
-+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-29 00:37:52 +0000