target/linux/lantiq/patches-3.2/0072-MIPS-lantiq-fix-spi-for-ase-update-for-clkdev-and-pl.patch

   1 From d1cd860adbd87c42c90db1c5658cf10ed1dbdd3e Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Thu, 12 Apr 2012 13:25:42 +0200
   4 Subject: [PATCH 72/73] MIPS: lantiq: fix spi for ase, update for clkdev and
   5  platform driver
   6
   7 irqs, gpios, chipselects
   8 updated to use module_platform_driver()
   9 clkdev is a bit hacky, using ltq_spi.0, as specifying no device numbering led to
  10 the mtd driver not hooking up to an spi flash.
  11
  12 Signed-off-by: Conor O'Gorman <i@conorogorman.net>
  13 ---
  14  .../mips/include/asm/mach-lantiq/xway/lantiq_irq.h |    4 ++
  15  arch/mips/lantiq/xway/sysctrl.c                    |    2 +-
  16  drivers/spi/spi-xway.c                             |   58 ++++++++++----------
  17  3 files changed, 35 insertions(+), 29 deletions(-)
  18
  19 diff --git a/arch/mips/include/asm/mach-lantiq/xway/lantiq_irq.h b/arch/mips/include/asm/mach-lantiq/xway/lantiq_irq.h
  20 index d9c892b..d86acdd 100644
  21 --- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_irq.h
  22 +++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_irq.h
  23 @@ -30,6 +30,10 @@
  24  #define LTQ_SSC_TIR_AR9                (INT_NUM_IM0_IRL0 + 14)
  25  #define LTQ_SSC_RIR_AR9                (INT_NUM_IM0_IRL0 + 15)
  26  #define LTQ_SSC_EIR            (INT_NUM_IM0_IRL0 + 16)
  27 +#define LTQ_SSC_RIR_ASE                (INT_NUM_IM0_IRL0 + 16)
  28 +#define LTQ_SSC_TIR_ASE                (INT_NUM_IM0_IRL0 + 17)
  29 +#define LTQ_SSC_EIR_ASE                (INT_NUM_IM0_IRL0 + 18)
  30 +#define LTQ_SSC_FIR_ASE                (INT_NUM_IM0_IRL0 + 19)
  31
  32  #define LTQ_MEI_DYING_GASP_INT (INT_NUM_IM1_IRL0 + 21)
  33  #define LTQ_MEI_INT            (INT_NUM_IM1_IRL0 + 23)
  34 diff --git a/arch/mips/lantiq/xway/sysctrl.c b/arch/mips/lantiq/xway/sysctrl.c
  35 index 5807456..de4ce8f 100644
  36 --- a/arch/mips/lantiq/xway/sysctrl.c
  37 +++ b/arch/mips/lantiq/xway/sysctrl.c
  38 @@ -233,7 +233,7 @@ void __init ltq_soc_init(void)
  39         clkdev_add_pmu("ltq_fpi", NULL, 0, PMU_FPI);
  40         clkdev_add_pmu("ltq_dma", NULL, 0, PMU_DMA);
  41         clkdev_add_pmu("ltq_stp", NULL, 0, PMU_STP);
  42 -       clkdev_add_pmu("ltq_spi", NULL, 0, PMU_SPI);
  43 +       clkdev_add_pmu("ltq_spi.0", NULL, 0, PMU_SPI);
  44          clkdev_add_pmu("ltq_gptu", NULL, 0, PMU_GPT);
  45          clkdev_add_pmu("ltq_ebu", NULL, 0, PMU_EBU);
  46         if (!ltq_is_vr9())
  47 diff --git a/drivers/spi/spi-xway.c b/drivers/spi/spi-xway.c
  48 index 016a6d0..be5c25b 100644
  49 --- a/drivers/spi/spi-xway.c
  50 +++ b/drivers/spi/spi-xway.c
  51 @@ -143,9 +143,9 @@
  52  #define LTQ_SPI_IRNEN_ALL      0xF
  53
  54  /* Hard-wired GPIOs used by SPI controller */
  55 -#define LTQ_SPI_GPIO_DI        16
  56 -#define LTQ_SPI_GPIO_DO                17
  57 -#define LTQ_SPI_GPIO_CLK       18
  58 +#define LTQ_SPI_GPIO_DI        (ltq_is_ase()?  8 : 16)
  59 +#define LTQ_SPI_GPIO_DO        (ltq_is_ase()?  9 : 17)
  60 +#define LTQ_SPI_GPIO_CLK       (ltq_is_ase()? 10 : 18)
  61
  62  struct ltq_spi {
  63         struct spi_bitbang      bitbang;
  64 @@ -229,7 +229,7 @@ static void ltq_spi_hw_enable(struct ltq_spi *hw)
  65         u32 clc;
  66
  67         /* Power-up mdule */
  68 -        clk_enable(hw->spiclk);
  69 +       clk_enable(hw->spiclk);
  70
  71         /*
  72          * Set clock divider for run mode to 1 to
  73 @@ -245,7 +245,7 @@ static void ltq_spi_hw_disable(struct ltq_spi *hw)
  74         ltq_spi_reg_write(hw, LTQ_SPI_CLC_DISS, LTQ_SPI_CLC);
  75
  76         /* Power-down mdule */
  77 -        clk_disable(hw->spiclk);
  78 +       clk_disable(hw->spiclk);
  79  }
  80
  81  static void ltq_spi_reset_fifos(struct ltq_spi *hw)
  82 @@ -284,7 +284,7 @@ static inline int ltq_spi_wait_ready(struct ltq_spi *hw)
  83                 cond_resched();
  84         } while (!time_after_eq(jiffies, timeout));
  85
  86 -       dev_err(hw->dev, "SPI wait ready timed out\n");
  87 +       dev_err(hw->dev, "SPI wait ready timed out stat: %x\n", stat);
  88
  89         return -ETIMEDOUT;
  90  }
  91 @@ -556,6 +556,12 @@ static const struct ltq_spi_cs_gpio_map ltq_spi_cs[] = {
  92         { 11, 3 },
  93  };
  94
  95 +static const struct ltq_spi_cs_gpio_map ltq_spi_cs_ase[] = {
  96 +       {  7, 2 },
  97 +       { 15, 1 },
  98 +       { 14, 1 },
  99 +};
 100 +
 101  static int ltq_spi_setup(struct spi_device *spi)
 102  {
 103         struct ltq_spi *hw = ltq_spi_to_hw(spi);
 104 @@ -600,8 +606,10 @@ static int ltq_spi_setup(struct spi_device *spi)
 105                 cstate->cs_activate = ltq_spi_gpio_cs_activate;
 106                 cstate->cs_deactivate = ltq_spi_gpio_cs_deactivate;
 107         } else {
 108 -               ret = ltq_gpio_request(&spi->dev, ltq_spi_cs[spi->chip_select].gpio,
 109 -                               ltq_spi_cs[spi->chip_select].mux,
 110 +               struct ltq_spi_cs_gpio_map *cs_map =
 111 +                               ltq_is_ase() ? ltq_spi_cs_ase : ltq_spi_cs;
 112 +               ret = ltq_gpio_request(&spi->dev, cs_map[spi->chip_select].gpio,
 113 +                               cs_map[spi->chip_select].mux,
 114                                 1, "spi-cs");
 115                 if (ret)
 116                         return -EBUSY;
 117 @@ -633,7 +641,8 @@ static void ltq_spi_cleanup(struct spi_device *spi)
 118         if (cdata && cdata->gpio)
 119                 gpio = cdata->gpio;
 120         else
 121 -               gpio = ltq_spi_cs[spi->chip_select].gpio;
 122 +               gpio = ltq_is_ase() ? ltq_spi_cs_ase[spi->chip_select].gpio :
 123 +                                        ltq_spi_cs[spi->chip_select].gpio;
 124
 125         gpio_free(gpio);
 126         kfree(cstate);
 127 @@ -868,7 +877,8 @@ static const struct ltq_spi_irq_map ltq_spi_irqs[] = {
 128         { "spi_err", ltq_spi_err_irq },
 129  };
 130
 131 -static int __init ltq_spi_probe(struct platform_device *pdev)
 132 +static int __devinit
 133 +ltq_spi_probe(struct platform_device *pdev)
 134  {
 135         struct spi_master *master;
 136         struct resource *r;
 137 @@ -910,14 +920,14 @@ static int __init ltq_spi_probe(struct platform_device *pdev)
 138
 139         hw->fpiclk = clk_get_fpi();
 140         if (IS_ERR(hw->fpiclk)) {
 141 -               dev_err(&pdev->dev, "clk_get\n");
 142 +               dev_err(&pdev->dev, "fpi clk\n");
 143                 ret = PTR_ERR(hw->fpiclk);
 144                 goto err_master;
 145         }
 146
 147         hw->spiclk = clk_get(&pdev->dev, NULL);
 148         if (IS_ERR(hw->spiclk)) {
 149 -               dev_err(&pdev->dev, "clk_get\n");
 150 +               dev_err(&pdev->dev, "spi clk\n");
 151                 ret = PTR_ERR(hw->spiclk);
 152                 goto err_master;
 153         }
 154 @@ -1014,7 +1024,8 @@ err:
 155         return ret;
 156  }
 157
 158 -static int __exit ltq_spi_remove(struct platform_device *pdev)
 159 +static int __devexit
 160 +ltq_spi_remove(struct platform_device *pdev)
 161  {
 162         struct ltq_spi *hw = platform_get_drvdata(pdev);
 163         int ret, i;
 164 @@ -1043,24 +1054,15 @@ static int __exit ltq_spi_remove(struct platform_device *pdev)
 165  }
 166
 167  static struct platform_driver ltq_spi_driver = {
 168 +       .probe = ltq_spi_probe,
 169 +       .remove = __devexit_p(ltq_spi_remove),
 170         .driver = {
 171 -                  .name = "ltq_spi",
 172 -                  .owner = THIS_MODULE,
 173 -                  },
 174 -       .remove = __exit_p(ltq_spi_remove),
 175 +               .name = "ltq_spi",
 176 +               .owner = THIS_MODULE,
 177 +               },
 178  };
 179
 180 -static int __init ltq_spi_init(void)
 181 -{
 182 -       return platform_driver_probe(&ltq_spi_driver, ltq_spi_probe);
 183 -}
 184 -module_init(ltq_spi_init);
 185 -
 186 -static void __exit ltq_spi_exit(void)
 187 -{
 188 -       platform_driver_unregister(&ltq_spi_driver);
 189 -}
 190 -module_exit(ltq_spi_exit);
 191 +module_platform_driver(ltq_spi_driver);
 192
 193  MODULE_DESCRIPTION("Lantiq SoC SPI controller driver");
 194  MODULE_AUTHOR("Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>");
 195 --
 196 1.7.9.1
 197