spi_s3c24xx: pin configuration updates
Subsystems (4)
PATCH 1/1 spi_s3c24xx: pin configuration updates
From: Ben Dooks <[email protected]>
Add a pin configuration callback for the s3c24xx SPI driver, as there are several options depending on the channel and the chip in use.
This is needed as the controller may not have been setup by the initial bootloader and the fact that the SPI controller gets reset over suspend/resume into slave mode but the GPIO function registers do not.
---
AFAICT not essential for 2.6.27, but Ben may have better data.
arch/arm/mach-s3c2410/include/mach/spi.h | 1 + drivers/spi/spi_s3c24xx.c | 6 ++++++ 2 files changed, 7 insertions(+)
arch/arm/mach-s3c2410/include/mach/spi.h +1 -0
@@ -18,6 +18,7 @@ struct s3c2410_spi_info {unsigned int num_cs;/* total chipselects */ int bus_num;/* bus number to use. */ +void (*gpio_setup)(struct s3c2410_spi_info *spi,int enable);void (*set_cs)(struct s3c2410_spi_info *spi,int cs,int pol); };
drivers/spi/spi_s3c24xx.c +6 -0
@@ -247,6 +247,9 @@ static void s3c24xx_spi_initialsetup(strwriteb (0xff , hw->regs +S3C2410_SPPRE );writeb (SPPIN_DEFAULT , hw->regs +S3C2410_SPPIN );writeb (SPCON_DEFAULT , hw->regs +S3C2410_SPCON ); + +if (hw->pdata && hw->pdata->gpio_setup) + hw->pdata->gpio_setup (hw->pdata,1 ); }static int __init s3c24xx_spi_probe (struct platform_device *pdev)
@@ -412,6 +415,9 @@ static int s3c24xx_spi_suspend(struct pl {struct s3c24xx_spi *hw =platform_get_drvdata (pdev); +if (hw->pdata && hw->pdata->gpio_setup) + hw->pdata->gpio_setup (hw->pdata,0 ); +clk_disable (hw->clk);return 0 ; }
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