Hello.
On 23-03-2011 14:32, Sekhar Nori wrote:
Add support for SATA controller on the
DA850/OMAP-L138/AM18x devices.
The patch adds the necessary clocks, platform
resources and a routine to initialize the SATA
controller.
The PHY configuration in this patch is
courtesy the work done by Zegeye Alemu,
Swaminathan and Mansoor Ahamed from TI.
While testing this patch, enable port multiplier
support iff you are actually using one. The
reasons of this behaviour are discussed
here: http://patchwork.ozlabs.org/patch/78163/
Signed-off-by: Sekhar Nori<[email protected]>
Cc: [email protected]
[...]
diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
index 68fe4c2..276199d 100644
--- a/arch/arm/mach-davinci/da850.c
+++ b/arch/arm/mach-davinci/da850.c
@@ -373,6 +373,14 @@ static struct clk spi1_clk = {
.flags = DA850_CLK_ASYNC3,
};
+static struct clk sata_clk = {
+ .name = "sata",
+ .parent =&pll0_sysclk2,
+ .lpsc = DA850_LPSC1_SATA,
+ .gpsc = 1,
+ .flags = PSC_FORCE,
+};
+
static struct clk_lookup da850_clks[] = {
CLK(NULL, "ref", &ref_clk),
CLK(NULL, "pll0", &pll0_clk),
@@ -419,6 +427,7 @@ static struct clk_lookup da850_clks[] = {
CLK(NULL, "usb20", &usb20_clk),
CLK("spi_davinci.0", NULL, &spi0_clk),
CLK("spi_davinci.1", NULL, &spi1_clk),
+ CLK("ahci", NULL, &sata_clk),
CLK(NULL, NULL, NULL),
};
I'd put the above into a separate patch...
diff --git a/arch/arm/mach-davinci/devices-da8xx.c
b/arch/arm/mach-davinci/devices-da8xx.c
index 625d4b6..e061396 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/arch/arm/mach-davinci/devices-da8xx.c
[...]
@@ -834,3 +836,139 @@ int __init da8xx_register_spi(int instance, struct
spi_board_info *info,
[...]
+/* 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 */
Why reserve a place for it at all?
+ 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_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;
+ }
{} not needed.
+
+ if (i == ARRAY_SIZE(da850_sata_xtal)) {
+ ret = -EINVAL;
+ goto err1;
+ } else {
*else* not needed here, after *goto*.
+ val = SATA_PHY_MPY(i + 1);
+ }
+
[...]
diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h
b/arch/arm/mach-davinci/include/mach/da8xx.h
index e4fc1af..aa6f08e 100644
--- a/arch/arm/mach-davinci/include/mach/da8xx.h
+++ b/arch/arm/mach-davinci/include/mach/da8xx.h
[...]
@@ -65,6 +66,7 @@ extern unsigned int da850_max_speed;
#define DA8XX_GPIO_BASE 0x01e26000
#define DA8XX_PSC1_BASE 0x01e27000
#define DA8XX_LCD_CNTRL_BASE 0x01e13000
+#define DA850_SATA_BASE 0x01e18000
It's used only in devices-da8xx.c -- shouldn't it be declared there?
WBR, Sergei
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