target/linux/brcm63xx/patches-3.3/014-spi-bcm63xx-don-t-use-the-stopping-state.patch

   1 From 1e41dc0ee2f3807328db95e4f87ff1333245190f Mon Sep 17 00:00:00 2001
   2 From: Florian Fainelli <florian@openwrt.org>
   3 Date: Fri, 20 Apr 2012 15:37:34 +0200
   4 Subject: [PATCH] spi/bcm63xx: don't use the stopping state
   5
   6 We do not need to use a flag to indicate if the master driver is stopping
   7 it is sufficient to perform spi master unregistering in the platform
   8 driver's remove function.
   9
  10 Signed-off-by: Florian Fainelli <florian@openwrt.org>
  11 Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
  12 ---
  13  drivers/spi/spi-bcm63xx.c |   13 ++-----------
  14  1 file changed, 2 insertions(+), 11 deletions(-)
  15
  16 --- a/drivers/spi/spi-bcm63xx.c
  17 +++ b/drivers/spi/spi-bcm63xx.c
  18 @@ -39,8 +39,6 @@
  19  #define DRV_VER                "0.1.2"
  20
  21  struct bcm63xx_spi {
  22 -       spinlock_t              lock;
  23 -       int                     stopping;
  24         struct completion       done;
  25
  26         void __iomem            *regs;
  27 @@ -161,9 +159,6 @@ static int bcm63xx_spi_setup(struct spi_
  28
  29         bs = spi_master_get_devdata(spi->master);
  30
  31 -       if (bs->stopping)
  32 -               return -ESHUTDOWN;
  33 -
  34         if (!spi->bits_per_word)
  35                 spi->bits_per_word = 8;
  36
  37 @@ -410,10 +405,8 @@ static int __devinit bcm63xx_spi_probe(s
  38         master->unprepare_transfer_hardware = bcm63xx_spi_unprepare_transfer;
  39         master->transfer_one_message = bcm63xx_spi_transfer_one;
  40         bs->speed_hz = pdata->speed_hz;
  41 -       bs->stopping = 0;
  42         bs->tx_io = (u8 *)(bs->regs + bcm63xx_spireg(SPI_MSG_DATA));
  43         bs->rx_io = (const u8 *)(bs->regs + bcm63xx_spireg(SPI_RX_DATA));
  44 -       spin_lock_init(&bs->lock);
  45
  46         /* Initialize hardware */
  47         clk_enable(bs->clk);
  48 @@ -447,18 +440,16 @@ static int __devexit bcm63xx_spi_remove(
  49         struct spi_master *master = platform_get_drvdata(pdev);
  50         struct bcm63xx_spi *bs = spi_master_get_devdata(master);
  51
  52 +       spi_unregister_master(master);
  53 +
  54         /* reset spi block */
  55         bcm_spi_writeb(bs, 0, SPI_INT_MASK);
  56 -       spin_lock(&bs->lock);
  57 -       bs->stopping = 1;
  58
  59         /* HW shutdown */
  60         clk_disable(bs->clk);
  61         clk_put(bs->clk);
  62
  63 -       spin_unlock(&bs->lock);
  64         platform_set_drvdata(pdev, 0);
  65 -       spi_unregister_master(master);
  66
  67         return 0;
  68  }