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SubjectRe: [PATCH] Bluetooth: hci_qca: Load customized NVM based on the device property
Hi Rocky,

On 2019-04-04 12:07, Rocky Liao wrote:
> QCA BTSOC nvm is a customized file and different vendor/platoform may
> want
> to have different BTSOC configuration via this file (e.g. Configure SCO
> over
> PCM or I2S, Setting Tx power, etc.) This patch will allow vendors to
> download
> different nvm file by reading a device property as the nvm file name
> postfix.
>

[Bala]: add the property which your reading to the documentation file.
"Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt"

> Signed-off-by: Rocky Liao <rjliao@codeaurora.org>
> ---
> drivers/bluetooth/btqca.c | 13 +++++++++----
> drivers/bluetooth/btqca.h | 4 ++--
> drivers/bluetooth/hci_qca.c | 18 +++++++++++++++++-
> 3 files changed, 28 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
> index 6122685..81e42f3 100644
> --- a/drivers/bluetooth/btqca.c
> +++ b/drivers/bluetooth/btqca.c
> @@ -332,7 +332,7 @@ int qca_set_bdaddr_rome(struct hci_dev *hdev,
> const bdaddr_t *bdaddr)
> EXPORT_SYMBOL_GPL(qca_set_bdaddr_rome);
>
> int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
> - enum qca_btsoc_type soc_type, u32 soc_ver)
> + enum qca_btsoc_type soc_type, u32 soc_ver, const char
> *nvm_postfix)
> {
> struct rome_config config;
> int err;
> @@ -368,9 +368,14 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t
> baudrate,
> if (soc_type == QCA_WCN3990)
> snprintf(config.fwname, sizeof(config.fwname),
> "qca/crnv%02x.bin", rom_ver);
> - else
> - snprintf(config.fwname, sizeof(config.fwname),
> - "qca/nvm_%08x.bin", soc_ver);
> + else {
> + if (NULL == nvm_postfix)
[Bala]:
something like this is more readable.
if (nvm_postfix)
append the nvm postfix string.
else
go with an default name.

> + snprintf(config.fwname, sizeof(config.fwname),
> + "qca/nvm_%08x.bin", soc_ver);
> + else
> + snprintf(config.fwname, sizeof(config.fwname),
> + "qca/nvm_%08x_%s.bin", soc_ver, nvm_postfix);
> + }
>
> err = qca_download_firmware(hdev, &config);
> if (err < 0) {
> diff --git a/drivers/bluetooth/btqca.h b/drivers/bluetooth/btqca.h
> index 6fdc25d..60a868f 100644
> --- a/drivers/bluetooth/btqca.h
> +++ b/drivers/bluetooth/btqca.h
> @@ -139,7 +139,7 @@ enum qca_btsoc_type {
>
> int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t *bdaddr);
> int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
> - enum qca_btsoc_type soc_type, u32 soc_ver);
> + enum qca_btsoc_type soc_type, u32 soc_ver, const char
> *nvm_postfix);
> int qca_read_soc_version(struct hci_dev *hdev, u32 *soc_version);
> int qca_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr);
> #else
> @@ -150,7 +150,7 @@ static inline int qca_set_bdaddr_rome(struct
> hci_dev *hdev, const bdaddr_t *bdad
> }
>
> static inline int qca_uart_setup(struct hci_dev *hdev, uint8_t
> baudrate,
> - enum qca_btsoc_type soc_type, u32 soc_ver)
> + enum qca_btsoc_type soc_type, u32 soc_ver, const char
> *nvm_postfix)
> {
> return -EOPNOTSUPP;
> }
> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
> index 4ea995d..f495f3b 100644
> --- a/drivers/bluetooth/hci_qca.c
> +++ b/drivers/bluetooth/hci_qca.c
> @@ -164,6 +164,7 @@ struct qca_serdev {
> struct hci_uart serdev_hu;
> struct gpio_desc *bt_en;
> struct clk *susclk;
> + const char *nvm_postfix;

[Bala]: nit: add the entry at last is preferred.

> enum qca_btsoc_type btsoc_type;
> struct qca_power *bt_power;
> u32 init_speed;
> @@ -189,6 +190,17 @@ static enum qca_btsoc_type qca_soc_type(struct
> hci_uart *hu)
> return soc_type;
> }
>
> +static const char *qca_get_nvm_postfix(struct hci_uart *hu)
> +{
> + if (hu->serdev) {
> + struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev);
> +
> + return qsd->nvm_postfix;
> + } else {
> + return NULL;
> + }
> +}
> +
> static void __serial_clock_on(struct tty_struct *tty)
> {
> /* TODO: Some chipset requires to enable UART clock on client
> @@ -1191,6 +1203,7 @@ static int qca_setup(struct hci_uart *hu)
> struct qca_data *qca = hu->priv;
> unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
> enum qca_btsoc_type soc_type = qca_soc_type(hu);
> + const char *nvm_postfix = qca_get_nvm_postfix(hu);
> int ret;
> int soc_ver = 0;
>
> @@ -1241,7 +1254,7 @@ static int qca_setup(struct hci_uart *hu)
>
> bt_dev_info(hdev, "QCA controller version 0x%08x", soc_ver);
> /* Setup patch / NVM configurations */
> - ret = qca_uart_setup(hdev, qca_baudrate, soc_type, soc_ver);
> + ret = qca_uart_setup(hdev, qca_baudrate, soc_type, soc_ver,
> nvm_postfix);
> if (!ret) {
> set_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags);
> qca_debugfs_init(hdev);
> @@ -1462,6 +1475,9 @@ static int qca_serdev_probe(struct serdev_device
> *serdev)
> return PTR_ERR(qcadev->bt_en);
> }
>
> + device_property_read_string(&serdev->dev, "nvm-postfix",
> + &qcadev->nvm_postfix);
> +
> qcadev->susclk = devm_clk_get(&serdev->dev, NULL);
> if (IS_ERR(qcadev->susclk)) {
> dev_err(&serdev->dev, "failed to acquire clk\n");

--
Regards
Balakrishna.

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