diff options
Diffstat (limited to 'target/linux/omap/patches-3.13/906-wlcore-sdio-get-clocks-from-device-tree.patch')
| -rw-r--r-- | target/linux/omap/patches-3.13/906-wlcore-sdio-get-clocks-from-device-tree.patch | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/target/linux/omap/patches-3.13/906-wlcore-sdio-get-clocks-from-device-tree.patch b/target/linux/omap/patches-3.13/906-wlcore-sdio-get-clocks-from-device-tree.patch new file mode 100644 index 0000000000..63d4f9b164 --- /dev/null +++ b/target/linux/omap/patches-3.13/906-wlcore-sdio-get-clocks-from-device-tree.patch @@ -0,0 +1,94 @@ +Read the clock nodes from the device tree and use them to set the +frequency for the refclock and the tcxo clock. + +Also, call sdio_set_drvdata() earlier, so the glue is already set in +the driver data when we call wlcore_get_pdata_from_of() and we don't +need to pass it as a parameter. + +Signed-off-by: Luciano Coelho <coelho@ti.com> +Reviewed-by: Felipe Balbi <balbi@ti.com> + +--- +drivers/net/wireless/ti/wlcore/sdio.c | 36 +++++++++++++++++++++++++++++++++-- + 1 file changed, 34 insertions(+), 2 deletions(-) + +--- 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 *wlco + 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 *wlco + 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 + /* 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 + 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_fu + { + 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); + |