Read the clock nodes from the device tree and use them to set the
frequency for the refclock and the tcxo clock.
Signed-off-by: Luciano Coelho <coelho@xxxxxx>
---
drivers/net/wireless/ti/wlcore/sdio.c | 36 +++++++++++++++++++++++++++++++--
1 file changed, 34 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ti/wlcore/sdio.c b/drivers/net/wireless/ti/wlcore/sdio.c
index 980bf3d..60fce49 100644
--- a/drivers/net/wireless/ti/wlcore/sdio.c
+++ b/drivers/net/wireless/ti/wlcore/sdio.c
@@ -53,6 +53,7 @@ static bool dump = false;
struct wl12xx_sdio_glue {
struct device *dev;
struct platform_device *core;
+ struct clk *refclock, *tcxoclock;
};
static const struct sdio_device_id wl1271_devices[] = {
@@ -224,6 +225,7 @@ static struct wl12xx_platform_data *wlcore_get_pdata_from_of(struct device *dev)
struct wl12xx_platform_data *pdata;
struct device_node *np = dev->of_node;
struct device_node *clock_node;
+ struct wl12xx_sdio_glue *glue = sdio_get_drvdata(dev_to_sdio_func(dev));
if (!np) {
np = of_find_matching_node(NULL, dev->driver->of_match_table);
@@ -250,6 +252,26 @@ static struct wl12xx_platform_data *wlcore_get_pdata_from_of(struct device *dev)
for_each_matching_node(clock_node, wlcore_sdio_of_clk_match_table)
of_fixed_clk_setup(clock_node);
+ /* TODO: make sure we have this when needed (ie. for WL6 and WL7) */
+ glue->refclock = of_clk_get_by_name(np, "refclock");
+ if (IS_ERR(glue->refclock)) {
+ dev_err(dev, "couldn't find refclock on the device tree\n");
+ glue->refclock = NULL;
+ } else {
+ clk_prepare_enable(glue->refclock);
+ pdata->ref_clock_freq = clk_get_rate(glue->refclock);
+ }
+
+ /* TODO: make sure we have this when needed (ie. for WL7) */
+ glue->tcxoclock = of_clk_get_by_name(np, "tcxoclock");
+ if (IS_ERR(glue->tcxoclock)) {
+ dev_err(dev, "couldn't find tcxoclock on the device tree\n");
+ glue->tcxoclock = NULL;
+ } else {
+ clk_prepare_enable(glue->tcxoclock);
+ pdata->ref_clock_freq = clk_get_rate(glue->tcxoclock);
+ }
+
goto out;
out_free:
@@ -294,6 +316,8 @@ static int wl1271_probe(struct sdio_func *func,
/* Use block mode for transferring over one block size of data */
func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
+ sdio_set_drvdata(func, glue);
+
/* The pdata allocated here is freed when the device is freed,
* so we don't need an additional out label to free it in case
* of error further on.
@@ -319,8 +343,6 @@ static int wl1271_probe(struct sdio_func *func,
if (mmcflags & MMC_PM_KEEP_POWER)
pdev_data->pwr_in_suspend = true;
- sdio_set_drvdata(func, glue);
-
/* Tell PM core that we don't need the card to be powered now */
pm_runtime_put_noidle(&func->dev);
@@ -387,6 +409,16 @@ static void wl1271_remove(struct sdio_func *func)
{
struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
+ if (glue->refclock) {
+ clk_disable_unprepare(glue->refclock);
+ clk_put(glue->refclock);
+ }
+
+ if (glue->tcxoclock) {
+ clk_disable_unprepare(glue->tcxoclock);
+ clk_put(glue->tcxoclock);
+ }
+
/* Undo decrement done above in wl1271_probe */
pm_runtime_get_noresume(&func->dev);
--
1.7.10.4
--
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