Title: [7843] trunk/drivers/spi/spi_bfin5xx.c: bug [#5687], reset SPI_CTL and SPI_FLG registers while executing PM
- Revision
- 7843
- Author
- bhsong
- Date
- 2009-11-18 04:43:21 -0500 (Wed, 18 Nov 2009)
Log Message
bug [#5687], reset SPI_CTL and SPI_FLG registers while executing PM
Modified Paths
Diff
Modified: trunk/drivers/spi/spi_bfin5xx.c (7842 => 7843)
--- trunk/drivers/spi/spi_bfin5xx.c 2009-11-18 09:35:57 UTC (rev 7842)
+++ trunk/drivers/spi/spi_bfin5xx.c 2009-11-18 09:43:21 UTC (rev 7843)
@@ -103,6 +103,9 @@
size_t rx_map_len;
size_t tx_map_len;
u8 n_bytes;
+ u16 ctrl_reg;
+ u16 flag_reg;
+
int cs_change;
struct transfer_ops *ops;
};
@@ -1522,9 +1525,15 @@
if (status != 0)
return status;
- /* stop hardware */
- bfin_spi_disable(drv_data);
+ drv_data->ctrl_reg = read_CTRL(drv_data);
+ drv_data->flag_reg = read_FLAG(drv_data);
+ /*
+ * reset SPI_CTL and SPI_FLG registers
+ */
+ write_FLAG(drv_data, 0xFF00);
+ write_CTRL(drv_data, 0x400);
+
return 0;
}
@@ -1533,8 +1542,8 @@
struct master_data *drv_data = platform_get_drvdata(pdev);
int status = 0;
- /* Enable the SPI interface */
- bfin_spi_enable(drv_data);
+ write_CTRL(drv_data, drv_data->ctrl_reg);
+ write_FLAG(drv_data, drv_data->flag_reg);
/* Start the queue running */
status = bfin_spi_start_queue(drv_data);
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