Reviewed-by: Gilad Broner <gbro...@codeaurora.org>
> This change enables the device ref clock before changing to HS mode
> and disables it if entered to PWM mode.
>
> Signed-off-by: Yaniv Gardi <yga...@codeaurora.org>
>
> ---
> drivers/scsi/ufs/ufs-qcom.c | 12 ++++++++++++
> drivers/scsi/ufs/ufshcd.h | 9 +++++++++
> 2 files changed, 21 insertions(+)
>
> diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
> index 966bacf..849fcf3 100644
> --- a/drivers/scsi/ufs/ufs-qcom.c
> +++ b/drivers/scsi/ufs/ufs-qcom.c
> @@ -980,6 +980,10 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba
> *hba,
> goto out;
> }
>
> + /* enable the device ref clock before changing to HS mode */
> + if (!ufshcd_is_hs_mode(&hba->pwr_info) &&
> + ufshcd_is_hs_mode(dev_req_params))
> + ufs_qcom_dev_ref_clk_ctrl(host, true);
> break;
> case POST_CHANGE:
> if (ufs_qcom_cfg_timers(hba, dev_req_params->gear_rx,
> @@ -1007,6 +1011,11 @@ static int ufs_qcom_pwr_change_notify(struct
> ufs_hba *hba,
> memcpy(&host->dev_req_params,
> dev_req_params, sizeof(*dev_req_params));
> ufs_qcom_update_bus_bw_vote(host);
> +
> + /* disable the device ref clock if entered PWM mode */
> + if (ufshcd_is_hs_mode(&hba->pwr_info) &&
> + !ufshcd_is_hs_mode(dev_req_params))
> + ufs_qcom_dev_ref_clk_ctrl(host, false);
> break;
> default:
> ret = -EINVAL;
> @@ -1108,6 +1117,9 @@ static int ufs_qcom_setup_clocks(struct ufs_hba
> *hba, bool on)
> ufs_qcom_phy_disable_iface_clk(host->generic_phy);
> goto out;
> }
> + /* enable the device ref clock for HS mode*/
> + if (ufshcd_is_hs_mode(&hba->pwr_info))
> + ufs_qcom_dev_ref_clk_ctrl(host, true);
> vote = host->bus_vote.saved_vote;
> if (vote == host->bus_vote.min_bw_vote)
> ufs_qcom_update_bus_bw_vote(host);
> diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
> index 41d9bfd..4bb6566 100644
> --- a/drivers/scsi/ufs/ufshcd.h
> +++ b/drivers/scsi/ufs/ufshcd.h
> @@ -54,6 +54,7 @@
> #include <linux/clk.h>
> #include <linux/completion.h>
> #include <linux/regulator/consumer.h>
> +#include "unipro.h"
>
> #include <asm/irq.h>
> #include <asm/byteorder.h>
> @@ -689,6 +690,14 @@ static inline int ufshcd_dme_peer_get(struct ufs_hba
> *hba,
>
> int ufshcd_read_device_desc(struct ufs_hba *hba, u8 *buf, u32 size);
>
> +static inline bool ufshcd_is_hs_mode(struct ufs_pa_layer_attr *pwr_info)
> +{
> + return (pwr_info->pwr_rx == FAST_MODE ||
> + pwr_info->pwr_rx == FASTAUTO_MODE) &&
> + (pwr_info->pwr_tx == FAST_MODE ||
> + pwr_info->pwr_tx == FASTAUTO_MODE);
> +}
> +
> #define ASCII_STD true
>
> int ufshcd_read_string_desc(struct ufs_hba *hba, int desc_index, u8 *buf,
> --
> 1.8.5.2
>
> --
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> of Code Aurora Forum, hosted by The Linux Foundation
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