From: Toshi Kikuchi <toshik@xxxxxxxxxxxx> This patch adds support for reading calibration data from Device Tree. It looks for the calibration data in Device Tree if it can't find it in a file. If there's no node in Device Tree, ath10k will try to find the calibration data from OTP. The node for the calibration data should be defined like this: pci { pcie@0 { reg = <0 0 0 0 0>; #interrupt-cells = <1>; #size-cells = <2>; #address-cells = <3>; device_type = "pci"; ath10k@0,0 { reg = <0 0 0 0 0>; device_type = "pci"; qcom,ath10k-calibration-data = [ 01 02 03 ... ]; }; }; }; Signed-off-by: Toshi Kikuchi <toshik@xxxxxxxxxxxx> Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxxxx> --- drivers/net/wireless/ath/ath10k/core.c | 70 ++++++++++++++++++++++++++++++++ drivers/net/wireless/ath/ath10k/core.h | 3 + 2 files changed, 72 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c index 7762061a1944..6165f2735b35 100644 --- a/drivers/net/wireless/ath/ath10k/core.c +++ b/drivers/net/wireless/ath/ath10k/core.c @@ -17,6 +17,7 @@ #include <linux/module.h> #include <linux/firmware.h> +#include <linux/of.h> #include "core.h" #include "mac.h" @@ -249,6 +250,63 @@ static int ath10k_download_cal_file(struct ath10k *ar) return 0; } +static int ath10k_download_cal_dt(struct ath10k *ar) +{ + struct device_node *node; + int data_len; + void *data; + int ret; + + node = ar->dev->of_node; + if (!node) + /* Device Tree is optional, don't print any warnings if + * there's no node for ath10k. + */ + return -ENOENT; + + if (!of_get_property(node, "qcom,ath10k-calibration-data", + &data_len)) { + /* The calibration data node is optional */ + return -ENOENT; + } + + if (data_len != QCA988X_CAL_DATA_LEN) { + ath10k_warn(ar, "invalid calibration data length in DT: %d\n", + data_len); + ret = -EMSGSIZE; + goto out; + } + + data = kmalloc(data_len, GFP_KERNEL); + if (!data) { + ret = -ENOMEM; + goto out; + } + + ret = of_property_read_u8_array(node, "qcom,ath10k-calibration-data", + data, data_len); + if (ret) { + ath10k_warn(ar, "failed to read calibration data from DT: %d\n", + ret); + goto out_free; + } + + ret = ath10k_download_board_data(ar, data, data_len); + if (ret) { + ath10k_warn(ar, "failed to download calibration data from Device Tree: %d\n", + ret); + goto out_free; + } + + ret = 0; + +out_free: + kfree(data); + +out: + return ret; +} + static int ath10k_download_and_run_otp(struct ath10k *ar) { u32 result, address = ar->hw_params.patch_load_addr; @@ -662,7 +720,17 @@ static int ath10k_download_cal_data(struct ath10k *ar) } ath10k_dbg(ar, ATH10K_DBG_BOOT, - "boot did not find a calibration file, try OTP next: %d\n", + "boot did not find a calibration file, try DT next: %d\n", + ret); + + ret = ath10k_download_cal_dt(ar); + if (ret == 0) { + ar->cal_mode = ATH10K_CAL_MODE_DT; + goto done; + } + + ath10k_dbg(ar, ATH10K_DBG_BOOT, + "boot did not find DT entry, try OTP next: %d\n", ret); ret = ath10k_download_and_run_otp(ar); diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h index 4a294987736c..2dd1bb05a3fc 100644 --- a/drivers/net/wireless/ath/ath10k/core.h +++ b/drivers/net/wireless/ath/ath10k/core.h @@ -400,6 +400,7 @@ enum ath10k_dev_flags { enum ath10k_cal_mode { ATH10K_CAL_MODE_FILE, ATH10K_CAL_MODE_OTP, + ATH10K_CAL_MODE_DT, }; static inline const char *ath10k_cal_mode_str(enum ath10k_cal_mode mode) @@ -409,6 +410,8 @@ static inline const char *ath10k_cal_mode_str(enum ath10k_cal_mode mode) return "file"; case ATH10K_CAL_MODE_OTP: return "otp"; + case ATH10K_CAL_MODE_DT: + return "dt"; } return "unknown"; -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html