spi: S3C24XX: reset register status on resume.
Fix a bug in the spi_s3c24xx driver where it does not reset the registers of the hardware when resuming from suspend (this block has been reset over suspend). Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Родитель
1a3f7d98e5
Коммит
5aa6cf302c
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@ -236,6 +236,19 @@ static irqreturn_t s3c24xx_spi_irq(int irq, void *dev)
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return IRQ_HANDLED;
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}
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static void s3c24xx_spi_initialsetup(struct s3c24xx_spi *hw)
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{
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/* for the moment, permanently enable the clock */
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clk_enable(hw->clk);
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/* program defaults into the registers */
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writeb(0xff, hw->regs + S3C2410_SPPRE);
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writeb(SPPIN_DEFAULT, hw->regs + S3C2410_SPPIN);
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writeb(SPCON_DEFAULT, hw->regs + S3C2410_SPCON);
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}
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static int __init s3c24xx_spi_probe(struct platform_device *pdev)
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{
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struct s3c2410_spi_info *pdata;
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@ -327,15 +340,7 @@ static int __init s3c24xx_spi_probe(struct platform_device *pdev)
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goto err_no_clk;
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}
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/* for the moment, permanently enable the clock */
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clk_enable(hw->clk);
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/* program defaults into the registers */
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writeb(0xff, hw->regs + S3C2410_SPPRE);
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writeb(SPPIN_DEFAULT, hw->regs + S3C2410_SPPIN);
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writeb(SPCON_DEFAULT, hw->regs + S3C2410_SPCON);
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s3c24xx_spi_initialsetup(hw);
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/* setup any gpio we can */
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@ -415,7 +420,7 @@ static int s3c24xx_spi_resume(struct platform_device *pdev)
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{
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struct s3c24xx_spi *hw = platform_get_drvdata(pdev);
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clk_enable(hw->clk);
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s3c24xx_spi_initialsetup(hw);
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return 0;
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}
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