ARM: davinci: da850: update SATA AHCI support

Update SATA AHCI support to make use of the new ahci_da850 host
driver (instead of the generic ahci_platform one) and remove
deprecated ahci_platform_data code.

Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

2 files changed, 9 insertions, 92 deletions

diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
index 2ab00434b2eb..85399c98f84a 100644
--- a/arch/arm/mach-davinci/da850.c
+++ b/arch/arm/mach-davinci/da850.c
@@ -472,7 +472,7 @@ static struct clk_lookup da850_clks[] = {
         CLK("spi_davinci.0",    NULL,           &spi0_clk),
         CLK("spi_davinci.1",    NULL,           &spi1_clk),
         CLK("vpif",             NULL,           &vpif_clk),
-        CLK("ahci",             NULL,           &sata_clk),
+        CLK("ahci_da850",               NULL,           &sata_clk),
         CLK("davinci-rproc.0",  NULL,           &dsp_clk),
         CLK("ehrpwm",           "fck",          &ehrpwm_clk),
         CLK("ehrpwm",           "tbclk",        &ehrpwm_tbclk),
diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index 0486cdf28c8d..56ea41d5f849 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/arch/arm/mach-davinci/devices-da8xx.c
@@ -1020,7 +1020,6 @@ int __init da8xx_register_spi_bus(int instance, unsigned num_chipselect)
 }
 
 #ifdef CONFIG_ARCH_DAVINCI_DA850
-
 static struct resource da850_sata_resources[] = {
         {
                 .start  = DA850_SATA_BASE,
@@ -1028,103 +1027,22 @@ static struct resource da850_sata_resources[] = {
                 .flags  = IORESOURCE_MEM,
         },
         {
+                .start  = DA8XX_SYSCFG1_BASE + DA8XX_PWRDN_REG,
+                .end    = DA8XX_SYSCFG1_BASE + DA8XX_PWRDN_REG + 0x3,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
                 .start  = IRQ_DA850_SATAINT,
                 .flags  = IORESOURCE_IRQ,
         },
 };
 
-/* SATA PHY Control Register offset from AHCI base */
-#define SATA_P0PHYCR_REG        0x178
-
-#define SATA_PHY_MPY(x)         ((x) << 0)
-#define SATA_PHY_LOS(x)         ((x) << 6)
-#define SATA_PHY_RXCDR(x)       ((x) << 10)
-#define SATA_PHY_RXEQ(x)        ((x) << 13)
-#define SATA_PHY_TXSWING(x)     ((x) << 19)
-#define SATA_PHY_ENPLL(x)       ((x) << 31)
-
-static struct clk *da850_sata_clk;
-static unsigned long da850_sata_refclkpn;
-
-/* Supported DA850 SATA crystal frequencies */
-#define KHZ_TO_HZ(freq) ((freq) * 1000)
-static unsigned long da850_sata_xtal[] = {
-        KHZ_TO_HZ(300000),
-        KHZ_TO_HZ(250000),
-        0,                      /* Reserved */
-        KHZ_TO_HZ(187500),
-        KHZ_TO_HZ(150000),
-        KHZ_TO_HZ(125000),
-        KHZ_TO_HZ(120000),
-        KHZ_TO_HZ(100000),
-        KHZ_TO_HZ(75000),
-        KHZ_TO_HZ(60000),
-};
-
-static int da850_sata_init(struct device *dev, void __iomem *addr)
-{
-        int i, ret;
-        unsigned int val;
-
-        da850_sata_clk = clk_get(dev, NULL);
-        if (IS_ERR(da850_sata_clk))
-                return PTR_ERR(da850_sata_clk);
-
-        ret = clk_prepare_enable(da850_sata_clk);
-        if (ret)
-                goto err0;
-
-        /* Enable SATA clock receiver */
-        val = __raw_readl(DA8XX_SYSCFG1_VIRT(DA8XX_PWRDN_REG));
-        val &= ~BIT(0);
-        __raw_writel(val, DA8XX_SYSCFG1_VIRT(DA8XX_PWRDN_REG));
-
-        /* Get the multiplier needed for 1.5GHz PLL output */
-        for (i = 0; i < ARRAY_SIZE(da850_sata_xtal); i++)
-                if (da850_sata_xtal[i] == da850_sata_refclkpn)
-                        break;
-
-        if (i == ARRAY_SIZE(da850_sata_xtal)) {
-                ret = -EINVAL;
-                goto err1;
-        }
-
-        val = SATA_PHY_MPY(i + 1) |
-                SATA_PHY_LOS(1) |
-                SATA_PHY_RXCDR(4) |
-                SATA_PHY_RXEQ(1) |
-                SATA_PHY_TXSWING(3) |
-                SATA_PHY_ENPLL(1);
-
-        __raw_writel(val, addr + SATA_P0PHYCR_REG);
-
-        return 0;
-
-err1:
-        clk_disable_unprepare(da850_sata_clk);
-err0:
-        clk_put(da850_sata_clk);
-        return ret;
-}
-
-static void da850_sata_exit(struct device *dev)
-{
-        clk_disable_unprepare(da850_sata_clk);
-        clk_put(da850_sata_clk);
-}
-
-static struct ahci_platform_data da850_sata_pdata = {
-        .init   = da850_sata_init,
-        .exit   = da850_sata_exit,
-};
-
 static u64 da850_sata_dmamask = DMA_BIT_MASK(32);
 
 static struct platform_device da850_sata_device = {
-        .name   = "ahci",
+        .name   = "ahci_da850",
         .id     = -1,
         .dev    = {
-                .platform_data          = &da850_sata_pdata,
                 .dma_mask               = &da850_sata_dmamask,
                 .coherent_dma_mask      = DMA_BIT_MASK(32),
         },
@@ -1134,9 +1052,8 @@ static struct platform_device da850_sata_device = {
 
 int __init da850_register_sata(unsigned long refclkpn)
 {
-        da850_sata_refclkpn = refclkpn;
-        if (!da850_sata_refclkpn)
-                return -EINVAL;
+        /* please see comment in drivers/ata/ahci_da850.c */
+        BUG_ON(refclkpn != 100 * 1000 * 1000);
 
         return platform_device_register(&da850_sata_device);
 }