diff options
| author | Yaniv Gardi <ygardi@codeaurora.org> | 2016-03-10 17:37:20 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-03-14 21:04:45 -0400 |
| commit | f37aabcf58202e65db3035b1b360d856dd378ee2 (patch) | |
| tree | acc36ed984b588c2b88b3ff72cffd277d9f082ff /drivers/scsi | |
| parent | 4b9ad0b88c3e8400f23aac63ac7709d4cd972392 (diff) | |
| download | linux-0-day-f37aabcf58202e65db3035b1b360d856dd378ee2.tar.gz linux-0-day-f37aabcf58202e65db3035b1b360d856dd378ee2.tar.xz | |
scsi: ufs-qcom: enable/disable the device ref clock
This change enables the device ref clock before changing to HS mode
and disables it if entered to PWM mode.
Reviewed-by: Gilad Broner <gbroner@codeaurora.org>
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/ufs/ufs-qcom.c | 12 | ||||
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.h | 9 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index 966bacf522c34..849fcf3570164 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 41d9bfd17facb..4bb65669f0529 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, |