mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-08-24 09:50:04 +00:00
Code Issues Releases Wiki Activity

ARM: davinci: da850: update SATA AHCI support

Browse source 
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>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2014-03-25 19:51:41 +01:00 committed by Tejun Heo
parent ae8723f8a9
commit 080c492df0
2 changed files with 9 additions and 92 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
arch/arm/mach-davinci/da850.c
View file

@ -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),

99
arch/arm/mach-davinci/devices-da8xx.c
View file

@ -1020,111 +1020,29 @@ 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,
.end = DA850_SATA_BASE + 0x1fff,
.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);
}