Author: nick
Date: 2012-05-04 10:14:09 +0100 (Fri, 04 May 2012)
New Revision: 1869
Added:
balloon/branches/menuconfig2/package/kernel/patches/2.6.39.4/rtc-ds1390.patch
Modified:
balloon/branches/menuconfig2/package/kernel/patches/2.6.39.4/series-balloon3-bubble-tt
Log:
add rtc patch for ds1390 to enable osc config and trickle charge mode setting
Added: balloon/branches/menuconfig2/package/kernel/patches/2.6.39.4/rtc-ds1390.patch
===================================================================
--- balloon/branches/menuconfig2/package/kernel/patches/2.6.39.4/rtc-ds1390.patch (rev 0)
+++ balloon/branches/menuconfig2/package/kernel/patches/2.6.39.4/rtc-ds1390.patch 2012-05-04 09:14:09 UTC (rev 1869)
@@ -0,0 +1,76 @@
+Index: linux-2.6.39.4/drivers/rtc/rtc-ds1390.c
+===================================================================
+--- linux-2.6.39.4.orig/drivers/rtc/rtc-ds1390.c 2012-05-04 09:29:23.000000000 +0100
++++ linux-2.6.39.4/drivers/rtc/rtc-ds1390.c 2012-05-04 09:34:54.000000000 +0100
+@@ -40,6 +40,24 @@
+ #define DS1390_REG_STATUS 0x0E
+ #define DS1390_REG_TRICKLE 0x0F
+
++/*Trickle Charge Register States */
++#define DS1390_TRICKLE_NO_DIODE_250R 0xA5
++#define DS1390_TRICKLE_ONE_DIODE_250R 0xA9
++#define DS1390_TRICKLE_NO_DIODE_2KR 0xA6
++#define DS1390_TRICKLE_ONE_DIODE_2KR 0xAA
++#define DS1390_TRICKLE_NO_DIODE_4KR 0xA7
++#define DS1390_TRICKLE_ONE_DIODE_4KR 0xAB
++#define DS1390_TRICKLE_DISABLE 0x00
++
++/*Register bits specific to DS1392 Control Register */
++#define DS1392_CONTROL_REG_NEOSC_BIT (1 << 7)
++#define DS1392_CONTROL_REG_BBSQI_BIT (1 << 5)
++#define DS1392_CONTROL_REG_RS2_BIT (1 << 4)
++#define DS1392_CONTROL_REG_RS1_BIT (1 << 3)
++#define DS1392_CONTROL_REG_NESQW (1 << 2)
++#define DS1392_CONTROL_REG_AIE (1 << 0)
++
++
+ struct ds1390 {
+ struct rtc_device *rtc;
+ u8 txrx_buf[9]; /* cmd + 8 registers */
+@@ -67,6 +85,27 @@
+ return 0;
+ }
+
++static int ds1390_put_reg(struct device *dev, unsigned char address,
++ unsigned char data)
++{
++ struct spi_device *spi = to_spi_device(dev);
++ struct ds1390 *chip = dev_get_drvdata(dev);
++ int status;
++
++ if (!data)
++ return -EINVAL;
++
++ /* Set MSB to indicate write (note datasheet waveform for DS1392 wrong here)*/
++ chip->txrx_buf[0] = address | 0x80;
++ chip->txrx_buf[1] = data;
++ /* do the i/o */
++ status = spi_write_then_read(spi, chip->txrx_buf, 2, chip->txrx_buf, 0);
++ if (status != 0)
++ return status;
++
++ return 0;
++}
++
+ static int ds1390_read_time(struct device *dev, struct rtc_time *dt)
+ {
+ struct spi_device *spi = to_spi_device(dev);
+@@ -152,6 +191,18 @@
+ res = PTR_ERR(chip->rtc);
+ kfree(chip);
+ }
++ /*FIXME should provide the means to set the osc config in reg 0x0D */
++ pr_info("%s : Setting control register to %d\n", __func__, 0);
++ res = ds1390_put_reg(&spi->dev, DS1390_REG_CONTROL, 0);
++ if (res != 0)
++ pr_err("%s : unable to set control reg\n", __func__);
++
++ /*Set up Trickle Charge Reg*/
++ /*FIXME the trickle charge setting ought to be a configuration parameter */
++ pr_info("%s : Setting trickle charge register to %d\n", __func__, DS1390_TRICKLE_ONE_DIODE_4KR);
++ res = ds1390_put_reg(&spi->dev, DS1390_REG_TRICKLE, DS1390_TRICKLE_ONE_DIODE_4KR);
++ if (res != 0)
++ pr_err("%s : unable to set trickle charge reg\n", __func__);
+
+ return res;
+ }
Modified: balloon/branches/menuconfig2/package/kernel/patches/2.6.39.4/series-balloon3-bubble-tt
===================================================================
--- balloon/branches/menuconfig2/package/kernel/patches/2.6.39.4/series-balloon3-bubble-tt 2012-05-04 09:12:23 UTC (rev 1868)
+++ balloon/branches/menuconfig2/package/kernel/patches/2.6.39.4/series-balloon3-bubble-tt 2012-05-04 09:14:09 UTC (rev 1869)
@@ -24,3 +24,4 @@
spi_tt.patch
usb_gadget_vbus.patch
wm8960.patch
+rtc-ds1390.patch
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