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Subject[RFC PATCH 05/15] phy: omap-pipe3: Add SATA DPLL support
Date
USB and SATA DPLLs need different settings. Provide
the SATA DPLL settings and use the proper DPLL settings
based on device tree compatible_id.

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
drivers/phy/phy-omap-pipe3.c | 82 ++++++++++++++++++++++++++--------------
include/linux/phy/omap_pipe3.h | 6 +++
2 files changed, 60 insertions(+), 28 deletions(-)

diff --git a/drivers/phy/phy-omap-pipe3.c b/drivers/phy/phy-omap-pipe3.c
index 807ab8a..19d1664 100644
--- a/drivers/phy/phy-omap-pipe3.c
+++ b/drivers/phy/phy-omap-pipe3.c
@@ -58,29 +58,41 @@
*/
# define PLL_IDLE_TIME 100;

-struct pipe3_dpll_map {
- unsigned long rate;
- struct pipe3_dpll_params params;
-};
-
-static struct pipe3_dpll_map dpll_map[] = {
+static struct pipe3_dpll_map dpll_map_usb[] = {
{12000000, {1250, 5, 4, 20, 0} }, /* 12 MHz */
{16800000, {3125, 20, 4, 20, 0} }, /* 16.8 MHz */
{19200000, {1172, 8, 4, 20, 65537} }, /* 19.2 MHz */
{20000000, {1000, 7, 4, 10, 0} }, /* 20 MHz */
{26000000, {1250, 12, 4, 20, 0} }, /* 26 MHz */
{38400000, {3125, 47, 4, 20, 92843} }, /* 38.4 MHz */
+ { }, /* Terminator */
+};
+
+static struct pipe3_dpll_map dpll_map_sata[] = {
+ {12000000, {1000, 7, 4, 6, 0} }, /* 12 MHz */
+ {16800000, {714, 7, 4, 6, 0} }, /* 16.8 MHz */
+ {19200000, {625, 7, 4, 6, 0} }, /* 19.2 MHz */
+ {20000000, {600, 7, 4, 6, 0} }, /* 20 MHz */
+ {26000000, {461, 7, 4, 6, 0} }, /* 26 MHz */
+ {38400000, {312, 7, 4, 6, 0} }, /* 38.4 MHz */
+ { }, /* Terminator */
};

-static struct pipe3_dpll_params *omap_pipe3_get_dpll_params(unsigned long rate)
+static struct pipe3_dpll_params *omap_pipe3_get_dpll_params(struct omap_pipe3
+ *pipe3)
{
- int i;
+ unsigned long rate;
+ struct pipe3_dpll_map *dpll_map = pipe3->dpll_map;

- for (i = 0; i < ARRAY_SIZE(dpll_map); i++) {
- if (rate == dpll_map[i].rate)
- return &dpll_map[i].params;
+ rate = clk_get_rate(pipe3->sys_clk);
+
+ for (; dpll_map->rate; dpll_map++) {
+ if (rate == dpll_map->rate)
+ return &dpll_map->params;
}

+ dev_err(pipe3->dev,
+ "No DPLL configuration for %lu Hz SYS CLK\n", rate);
return 0;
}

@@ -148,10 +160,8 @@ static int omap_pipe3_dpll_lock(struct omap_pipe3 *phy)
struct pipe3_dpll_params *dpll_params;

rate = clk_get_rate(phy->sys_clk);
- dpll_params = omap_pipe3_get_dpll_params(rate);
+ dpll_params = omap_pipe3_get_dpll_params(phy);
if (!dpll_params) {
- dev_err(phy->dev,
- "No DPLL configuration for %lu Hz SYS CLK\n", rate);
return -EINVAL;
}

@@ -206,6 +216,25 @@ static struct phy_ops ops = {
.owner = THIS_MODULE,
};

+#ifdef CONFIG_OF
+static const struct of_device_id omap_pipe3_id_table[] = {
+ {
+ .compatible = "ti,omap-pipe3",
+ .data = dpll_map_usb,
+ },
+ {
+ .compatible = "ti,omap-sata",
+ .data = dpll_map_sata,
+ },
+ {
+ .compatible = "ti,omap-usb3",
+ .data = dpll_map_usb,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, omap_pipe3_id_table);
+#endif
+
static int omap_pipe3_probe(struct platform_device *pdev)
{
struct omap_pipe3 *phy;
@@ -215,9 +244,7 @@ static int omap_pipe3_probe(struct platform_device *pdev)
struct device_node *node = pdev->dev.of_node;
struct device_node *control_node;
struct platform_device *control_pdev;
-
- if (!node)
- return -EINVAL;
+ const struct of_device_id *match;

phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
if (!phy) {
@@ -225,6 +252,16 @@ static int omap_pipe3_probe(struct platform_device *pdev)
return -ENOMEM;
}

+ match = of_match_device(of_match_ptr(omap_pipe3_id_table), &pdev->dev);
+ if (!match)
+ return -EINVAL;
+
+ phy->dpll_map = (struct pipe3_dpll_map *)match->data;
+ if (!phy->dpll_map) {
+ dev_err(&pdev->dev, "no dpll data\n");
+ return -EINVAL;
+ }
+
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pll_ctrl");
phy->pll_ctrl_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(phy->pll_ctrl_base))
@@ -354,17 +391,6 @@ static const struct dev_pm_ops omap_pipe3_pm_ops = {
#define DEV_PM_OPS NULL
#endif

-#ifdef CONFIG_OF
-static const struct of_device_id omap_pipe3_id_table[] = {
- { .compatible = "ti,omap-pipe3" },
- { .compatible = "ti,omap-sata" },
- { .compatible = "ti,omap-pcie" },
- { .compatible = "ti,omap-usb3" },
- {}
-};
-MODULE_DEVICE_TABLE(of, omap_pipe3_id_table);
-#endif
-
static struct platform_driver omap_pipe3_driver = {
.probe = omap_pipe3_probe,
.remove = omap_pipe3_remove,
diff --git a/include/linux/phy/omap_pipe3.h b/include/linux/phy/omap_pipe3.h
index 7329056..86825ca 100644
--- a/include/linux/phy/omap_pipe3.h
+++ b/include/linux/phy/omap_pipe3.h
@@ -29,6 +29,11 @@ struct pipe3_dpll_params {
u32 mf;
};

+struct pipe3_dpll_map {
+ unsigned long rate;
+ struct pipe3_dpll_params params;
+};
+
struct omap_pipe3 {
void __iomem *pll_ctrl_base;
struct device *dev;
@@ -36,6 +41,7 @@ struct omap_pipe3 {
struct clk *wkupclk;
struct clk *sys_clk;
struct clk *optclk;
+ struct pipe3_dpll_map *dpll_map;
};

static inline u32 omap_pipe3_readl(void __iomem *addr, unsigned offset)
--
1.7.4.1


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