mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-25 02:30:38 +02:00
Add jz4740-rtc driver.
This commit is contained in:
Lars-Peter Clausen
Xiangfu Liu
parent
9480e0470b
commit
4c36a20b10
@ -253,7 +253,11 @@ CONFIG_PM=y
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# CONFIG_PNX8550_STB810 is not set
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CONFIG_PREEMPT=y
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# CONFIG_PREEMPT_NONE is not set
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# CONFIG_PROM_EMU is not set
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CONFIG_RELAY=y
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CONFIG_RTC_CLASS=y
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# CONFIG_RTC_DRV_CMOS is not set
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CONFIG_RTC_DRV_JZ4740=y
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CONFIG_SCHED_OMIT_FRAME_POINTER=y
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# CONFIG_SCSI_DMA is not set
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CONFIG_SDIO_UART=y
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@ -113,6 +113,26 @@ static struct platform_device jz_mmc_device = {
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.resource = jz_mmc_resources,
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};
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static struct resource jz_rtc_resources[] = {
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[0] = {
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.start = CPHYSADDR(RTC_BASE),
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.end = CPHYSADDR(RTC_BASE) + 0x10,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = JZ_IRQ_RTC,
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.end = JZ_IRQ_RTC,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device jz_rtc_device = {
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.name = "jz4740-rtc",
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.id = -1,
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.num_resources = ARRAY_SIZE(jz_rtc_resources),
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.resource = jz_rtc_resources,
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};
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/** I2C controller **/
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static struct resource jz_i2c_resources[] = {
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[0] = {
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@ -420,6 +440,7 @@ static struct platform_device *jz_platform_devices[] __initdata = {
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&qi_lb60_fb,
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&jz_i2s_device,
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&jz_codec_device,
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&jz_rtc_device,
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};
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static int __init jz_platform_init(void)
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325
target/linux/xburst/files-2.6.31/drivers/rtc/rtc-jz4740.c
Normal file
325
target/linux/xburst/files-2.6.31/drivers/rtc/rtc-jz4740.c
Normal file
@ -0,0 +1,325 @@
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/*
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* Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
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* JZ4720/JZ4740 SoC RTC driver
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/spinlock.h>
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#include <linux/rtc.h>
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#define JZ_REG_RTC_CTRL 0x00
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#define JZ_REG_RTC_SEC 0x04
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#define JZ_REG_RTC_SEC_ALARM 0x08
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#define JZ_REG_REGULATOR 0x0C
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#define JZ_RTC_CTRL_WRDY BIT(7)
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#define JZ_RTC_CTRL_1HZ BIT(6)
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#define JZ_RTC_CTRL_1HZ_IRQ BIT(5)
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#define JZ_RTC_CTRL_AF BIT(4)
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#define JZ_RTC_CTRL_AF_IRQ BIT(3)
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#define JZ_RTC_CTRL_AE BIT(2)
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#define JZ_RTC_CTRL_ENABLE BIT(0)
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struct jz4740_rtc {
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struct resource *mem;
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void __iomem *base;
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struct rtc_device *rtc;
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unsigned int irq;
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spinlock_t lock;
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};
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static inline uint32_t jz4740_rtc_reg_read(struct jz4740_rtc *rtc, size_t reg)
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{
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return readl(rtc->base + reg);
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}
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static inline void jz4740_rtc_wait_write_ready(struct jz4740_rtc *rtc)
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{
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uint32_t ctrl;
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do {
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ctrl = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL);
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} while (!(ctrl & JZ_RTC_CTRL_WRDY));
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}
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static inline void jz4740_rtc_reg_write(struct jz4740_rtc *rtc, size_t reg,
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uint32_t val)
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{
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jz4740_rtc_wait_write_ready(rtc);
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writel(val, rtc->base + reg);
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}
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static void jz4740_rtc_ctrl_set_bits(struct jz4740_rtc *rtc, uint32_t mask,
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uint32_t val)
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{
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unsigned long flags;
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uint32_t ctrl;
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spin_lock_irqsave(&rtc->lock, flags);
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ctrl = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL);
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/* Don't clear interrupt flags by accident */
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ctrl |= JZ_RTC_CTRL_1HZ | JZ_RTC_CTRL_AF;
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ctrl &= ~mask;
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ctrl |= val;
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jz4740_rtc_reg_write(rtc, JZ_REG_RTC_CTRL, ctrl);
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spin_unlock_irqrestore(&rtc->lock, flags);
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}
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static inline struct jz4740_rtc *dev_to_rtc(struct device *dev)
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{
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return dev_get_drvdata(dev);
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}
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static int jz4740_rtc_read_time(struct device *dev, struct rtc_time *time)
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{
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struct jz4740_rtc *rtc = dev_to_rtc(dev);
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uint32_t secs, secs2;
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secs = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SEC);
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secs2 = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SEC);
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while (secs != secs2) {
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secs = secs2;
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secs2 = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SEC);
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}
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rtc_time_to_tm(secs, time);
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return rtc_valid_tm(time);
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}
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static int jz4740_rtc_set_mmss(struct device *dev, unsigned long secs)
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{
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struct jz4740_rtc *rtc = dev_to_rtc(dev);
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if ((uint32_t)secs != secs)
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return -EINVAL;
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jz4740_rtc_reg_write(rtc, JZ_REG_RTC_SEC, secs);
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return 0;
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}
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static int jz4740_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
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{
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struct jz4740_rtc *rtc = dev_to_rtc(dev);
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uint32_t secs, secs2;
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uint32_t ctrl;
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secs = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SEC_ALARM);
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secs2 = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SEC_ALARM);
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while (secs != secs2){
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secs = secs2;
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secs2 = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SEC_ALARM);
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}
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ctrl = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL);
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alrm->enabled = !!(ctrl & JZ_RTC_CTRL_AE);
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alrm->pending = !!(ctrl & JZ_RTC_CTRL_AF);
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rtc_time_to_tm(secs, &alrm->time);
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return rtc_valid_tm(&alrm->time);
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}
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static int jz4740_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
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{
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struct jz4740_rtc *rtc = dev_to_rtc(dev);
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unsigned long secs;
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rtc_tm_to_time(&alrm->time, &secs);
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if ((uint32_t)secs != secs)
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return -EINVAL;
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jz4740_rtc_reg_write(rtc, JZ_REG_RTC_SEC_ALARM, (uint32_t)secs);
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jz4740_rtc_ctrl_set_bits(rtc, JZ_RTC_CTRL_AE,
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alrm->enabled ? JZ_RTC_CTRL_AE : 0);
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return 0;
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}
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static int jz4740_rtc_update_irq_enable(struct device *dev, unsigned int enabled)
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{
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struct jz4740_rtc *rtc = dev_to_rtc(dev);
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jz4740_rtc_ctrl_set_bits(rtc, JZ_RTC_CTRL_1HZ_IRQ,
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enabled ? JZ_RTC_CTRL_1HZ_IRQ : 0);
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return 0;
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}
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static int jz4740_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
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{
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struct jz4740_rtc *rtc = dev_to_rtc(dev);
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jz4740_rtc_ctrl_set_bits(rtc, JZ_RTC_CTRL_AF_IRQ,
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enabled ? JZ_RTC_CTRL_AF_IRQ : 0);
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return 0;
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}
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static struct rtc_class_ops jz4740_rtc_ops = {
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.read_time = jz4740_rtc_read_time,
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.set_mmss = jz4740_rtc_set_mmss,
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.read_alarm = jz4740_rtc_read_alarm,
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.set_alarm = jz4740_rtc_set_alarm,
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.update_irq_enable = jz4740_rtc_update_irq_enable,
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.alarm_irq_enable = jz4740_rtc_alarm_irq_enable,
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};
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static irqreturn_t jz4740_rtc_irq(int irq, void *data)
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{
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struct jz4740_rtc *rtc = data;
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uint32_t ctrl;
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unsigned long events = 0;
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ctrl = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL);
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if (ctrl & JZ_RTC_CTRL_1HZ)
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events |= (RTC_UF | RTC_IRQF);
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if (ctrl & JZ_RTC_CTRL_AF)
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events |= (RTC_AF | RTC_IRQF);
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rtc_update_irq(rtc->rtc, 1, events);
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jz4740_rtc_ctrl_set_bits(rtc, JZ_RTC_CTRL_1HZ | JZ_RTC_CTRL_AF, 0);
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return IRQ_HANDLED;
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}
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static int __devinit jz4740_rtc_probe(struct platform_device *pdev)
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{
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int ret;
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struct jz4740_rtc *rtc;
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rtc = kmalloc(sizeof(*rtc), GFP_KERNEL);
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rtc->irq = platform_get_irq(pdev, 0);
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if (rtc->irq < 0) {
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ret = -ENOENT;
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dev_err(&pdev->dev, "Failed to get platform irq\n");
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goto err_free;
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}
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rtc->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!rtc->mem) {
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ret = -ENOENT;
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dev_err(&pdev->dev, "Failed to get platform mmio memory\n");
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goto err_free;
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}
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rtc->mem = request_mem_region(rtc->mem->start, resource_size(rtc->mem),
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pdev->name);
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if (!rtc->mem) {
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ret = -EBUSY;
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dev_err(&pdev->dev, "Failed to request mmio memory region\n");
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goto err_free;
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}
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rtc->base = ioremap_nocache(rtc->mem->start, resource_size(rtc->mem));
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if (!rtc->base) {
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ret = -EBUSY;
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dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
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goto err_release_mem_region;
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}
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platform_set_drvdata(pdev, rtc);
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rtc->rtc = rtc_device_register(pdev->name, &pdev->dev, &jz4740_rtc_ops,
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THIS_MODULE);
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if (IS_ERR(rtc->rtc)) {
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ret = PTR_ERR(rtc->rtc);
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dev_err(&pdev->dev, "Failed to register rtc device: %d\n", ret);
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goto err_iounmap;
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}
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ret = request_irq(rtc->irq, jz4740_rtc_irq, 0,
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pdev->name, rtc);
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if (ret) {
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dev_err(&pdev->dev, "Failed to request rtc irq: %d\n", ret);
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goto err_unregister_rtc;
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}
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printk("rtc-ctrl: %d\n", jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL));
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return 0;
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err_unregister_rtc:
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rtc_device_unregister(rtc->rtc);
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err_iounmap:
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platform_set_drvdata(pdev, NULL);
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iounmap(rtc->base);
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err_release_mem_region:
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release_mem_region(rtc->mem->start, resource_size(rtc->mem));
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err_free:
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kfree(rtc);
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return ret;
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}
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static int __devexit jz4740_rtc_remove(struct platform_device *pdev)
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{
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struct jz4740_rtc *rtc = platform_get_drvdata(pdev);
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rtc_device_unregister(rtc->rtc);
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iounmap(rtc->base);
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release_mem_region(rtc->mem->start, resource_size(rtc->mem));
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kfree(rtc);
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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struct platform_driver jz4740_rtc_driver = {
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.probe = jz4740_rtc_probe,
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.remove = __devexit_p(jz4740_rtc_remove),
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.driver = {
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.name = "jz4740-rtc",
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.owner = THIS_MODULE,
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},
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};
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static int __init jz4740_rtc_init(void)
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{
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return platform_driver_register(&jz4740_rtc_driver);
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}
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module_init(jz4740_rtc_init);
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static void __exit jz4740_rtc_exit(void)
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{
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platform_driver_unregister(&jz4740_rtc_driver);
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}
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module_exit(jz4740_rtc_exit);
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MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("RTC driver for the JZ4720/JZ4740 SoC\n");
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MODULE_ALIAS("platform:jz4740-rtc");
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MODULE_ALIAS("platform:jz4720-rtc");
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30
target/linux/xburst/patches-2.6.31/052-rtc.patch
Normal file
30
target/linux/xburst/patches-2.6.31/052-rtc.patch
Normal file
@ -0,0 +1,30 @@
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--- a/drivers/rtc/Kconfig 2009-09-02 16:48:11.000000000 +0200
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+++ b/drivers/rtc//Kconfig 2009-09-20 03:21:58.000000000 +0200
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@@ -460,6 +460,17 @@
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This driver can also be built as a module. If so, the module
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will be called rtc-efi.
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+config RTC_DRV_JZ4740
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+ tristate "Ingenic JZ4720/JZ4740 SoC"
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+ depends on RTC_CLASS
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+ depends on SOC_JZ4740
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+ help
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+ If you say yes here you get support for the
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+ Ingenic JZ4720/JZ4740 SoC RTC controller.
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+
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+ This driver can also be buillt as a module. If so, the module
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+ will be called rtc-jz4740.
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+
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config RTC_DRV_STK17TA8
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tristate "Simtek STK17TA8"
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depends on RTC_CLASS
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--- a/drivers/rtc/Makefile 2009-09-02 16:48:11.000000000 +0200
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+++ b/drivers/rtc/Makefile 2009-09-20 03:16:44.000000000 +0200
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@@ -40,6 +40,7 @@
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obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o
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obj-$(CONFIG_RTC_DRV_FM3130) += rtc-fm3130.o
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obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o
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+obj-$(CONFIG_RTC_DRV_JZ4740) += rtc-jz4740.o
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obj-$(CONFIG_RTC_DRV_M41T80) += rtc-m41t80.o
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obj-$(CONFIG_RTC_DRV_M41T94) += rtc-m41t94.o
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obj-$(CONFIG_RTC_DRV_M48T35) += rtc-m48t35.o
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