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[4/3] davinci: Add RTC support for DA8xx/OMAP-L13x SoC's

Message ID 20090909221347.GA32626@mag.az.mvista.com (mailing list archive)
State Changes Requested
Headers show

Commit Message

Mark A. Greer Sept. 9, 2009, 10:13 p.m. UTC 
From: Mark A. Greer <mgreer@mvista.com>

Add RTC support for the da830/omap-l137 and da850/omap-l138
SoC's by leveraging existing the rtc-omap driver.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
---
May as well add this one to the list.

The rtc won't actually work until
http://groups.google.com/group/rtc-linux/browse_thread/thread/e3f5de9551453d92
is accepted but there should be no harm in adding this patch now.

 arch/arm/mach-davinci/board-da830-evm.c    |    4 +++
 arch/arm/mach-davinci/board-da850-evm.c    |    4 +++
 arch/arm/mach-davinci/devices-da8xx.c      |   35 ++++++++++++++++++++++++++++
 arch/arm/mach-davinci/include/mach/da8xx.h |    1 +
 drivers/rtc/Kconfig                        |    7 +++--
 5 files changed, 48 insertions(+), 3 deletions(-)
diff mbox

Patch

diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c
index df84f3a..11edfce 100644
--- a/arch/arm/mach-davinci/board-da830-evm.c
+++ b/arch/arm/mach-davinci/board-da830-evm.c
@@ -209,6 +209,10 @@  static __init void da830_evm_init(void)
 	if (ret)
 		pr_warning("da830_evm_init: lcd setup failed: %d\n", ret);
 #endif
+
+	ret = da8xx_register_rtc();
+	if (ret)
+		pr_warning("da830_evm_init: rtc setup failed: %d\n", ret);
 }
 
 #ifdef CONFIG_SERIAL_8250_CONSOLE
diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index 83d2f82..6b42cba 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -381,6 +381,10 @@  static __init void da850_evm_init(void)
 	if (ret)
 		pr_warning("da850_evm_init: lcdc registration failed: %d\n",
 				ret);
+
+	ret = da8xx_register_rtc();
+	if (ret)
+		pr_warning("da850_evm_init: rtc setup failed: %d\n", ret);
 }
 
 #ifdef CONFIG_SERIAL_8250_CONSOLE
diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index bc91455..cf7f15c 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/arch/arm/mach-davinci/devices-da8xx.c
@@ -29,6 +29,7 @@ 
 #define DA8XX_TPTC1_BASE		0x01c08400
 #define DA8XX_WDOG_BASE			0x01c21000 /* DA8XX_TIMER64P1_BASE */
 #define DA8XX_I2C0_BASE			0x01c22000
+#define DA8XX_RTC_BASE			0x01C23000
 #define DA8XX_EMAC_CPPI_PORT_BASE	0x01e20000
 #define DA8XX_EMAC_CPGMACSS_BASE	0x01e22000
 #define DA8XX_EMAC_CPGMAC_BASE		0x01e23000
@@ -451,3 +452,37 @@  int __init da8xx_register_mmcsd0(struct davinci_mmc_config *config)
 	da8xx_mmcsd0_device.dev.platform_data = config;
 	return platform_device_register(&da8xx_mmcsd0_device);
 }
+
+static struct resource da8xx_rtc_resources[] = {
+	{
+		.start		= DA8XX_RTC_BASE,
+		.end		= DA8XX_RTC_BASE + SZ_4K - 1,
+		.flags		= IORESOURCE_MEM,
+	},
+	{ /* timer irq */
+		.start		= IRQ_DA8XX_RTC,
+		.end		= IRQ_DA8XX_RTC,
+		.flags		= IORESOURCE_IRQ,
+	},
+	{ /* alarm irq */
+		.start		= IRQ_DA8XX_RTC,
+		.end		= IRQ_DA8XX_RTC,
+		.flags		= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device da8xx_rtc_device = {
+	.name           = "omap_rtc",
+	.id             = -1,
+	.num_resources	= ARRAY_SIZE(da8xx_rtc_resources),
+	.resource	= da8xx_rtc_resources,
+};
+
+int da8xx_register_rtc(void)
+{
+	/* Unlock the rtc's registers */
+	__raw_writel(0x83e70b13, IO_ADDRESS(DA8XX_RTC_BASE + 0x6c));
+	__raw_writel(0x95a4f1e0, IO_ADDRESS(DA8XX_RTC_BASE + 0x70));
+
+	return platform_device_register(&da8xx_rtc_device);
+}
diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h b/arch/arm/mach-davinci/include/mach/da8xx.h
index 76beca5..08a8f16 100644
--- a/arch/arm/mach-davinci/include/mach/da8xx.h
+++ b/arch/arm/mach-davinci/include/mach/da8xx.h
@@ -77,6 +77,7 @@  int da8xx_register_emac(void);
 int da8xx_register_lcdc(struct da8xx_lcdc_platform_data *pdata);
 int da8xx_register_mmcsd0(struct davinci_mmc_config *config);
 void __init da8xx_init_mcasp(int id, struct snd_platform_data *pdata);
+int da8xx_register_rtc(void);
 
 extern struct platform_device da8xx_serial_device;
 extern struct emac_platform_data da8xx_emac_pdata;
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index e104be3..b79320d 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -548,10 +548,11 @@  comment "on-CPU RTC drivers"
 
 config RTC_DRV_OMAP
 	tristate "TI OMAP1"
-	depends on ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730
+	depends on ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730 || ARCH_DAVINCI_DA8XX
 	help
-	  Say "yes" here to support the real time clock on TI OMAP1 chips.
-	  This driver can also be built as a module called rtc-omap.
+	  Say "yes" here to support the real time clock on TI OMAP1 and
+	  DA8xx/OMAP-L13x chips.  This driver can also be built as a
+	  module called rtc-omap.
 
 config RTC_DRV_S3C
 	tristate "Samsung S3C series SoC RTC"