davinci: Add RTC support for DA8xx/OMAP-L13x SoC's

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>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

4 files changed, 44 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c
index fb941eb1f4da..20100370e2e6 100644
--- a/arch/arm/mach-davinci/board-da830-evm.c
+++ b/arch/arm/mach-davinci/board-da830-evm.c
@@ -228,6 +228,10 @@ 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 da1a6fba28c1..47619a98b562 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 55956135cdf4..dd0ea08bc324 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
@@ -453,3 +454,37 @@ 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 375a3f7af03d..a152261c1951 100644
--- a/arch/arm/mach-davinci/include/mach/da8xx.h
+++ b/arch/arm/mach-davinci/include/mach/da8xx.h
@@ -81,6 +81,7 @@ 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_register_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;