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scsi: ufs-qcom: Configure LPM timer settings

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The timer settings of LPM features such as clock gating, auto hibern8 and
RPM auto suspend are hard coded in UFS common driver, make this change to
configure these settings in vendor specific driver.

Change-Id: Iddf5c5024a168bc6b8ebc8948a5aa9ffbb2e4e1b
Signed-off-by: Can Guo <cang@codeaurora.org>
This commit is contained in:
Can Guo 2020-03-12 22:17:02 -07:00
commit d07049b66c
2 changed files with 28 additions and 0 deletions
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23
drivers/scsi/ufs/ufs-qcom.c
View file

@ -6,6 +6,7 @@
#include <linux/acpi.h>
#include <linux/time.h>
#include <linux/of.h>
#include <linux/bitfield.h>
#include <linux/platform_device.h>
#include <linux/phy/phy.h>
#include <linux/gpio/consumer.h>
@ -1486,8 +1487,19 @@ out:
static int ufs_qcom_apply_dev_quirks(struct ufs_hba *hba)
{
unsigned long flags;
int err = 0;
spin_lock_irqsave(hba->host->host_lock, flags);
/* Set the rpm auto suspend delay to 3s */
hba->host->hostt->rpm_autosuspend_delay = UFS_QCOM_AUTO_SUSPEND_DELAY;
/* Set the default auto-hiberate idle timer value to 1ms */
hba->ahit = FIELD_PREP(UFSHCI_AHIBERN8_TIMER_MASK, 1) |
FIELD_PREP(UFSHCI_AHIBERN8_SCALE_MASK, 3);
/* Set the clock gating delay to performance mode */
hba->clk_gating.delay_ms = UFS_QCOM_CLK_GATING_DELAY_MS_PERF;
spin_unlock_irqrestore(hba->host->host_lock, flags);
if (hba->dev_quirks & UFS_DEVICE_QUIRK_HOST_PA_SAVECONFIGTIME)
err = ufs_qcom_quirk_host_pa_saveconfigtime(hba);
@ -2352,6 +2364,12 @@ out:
static int ufs_qcom_clk_scale_up_post_change(struct ufs_hba *hba)
{
unsigned long flags;
spin_lock_irqsave(hba->host->host_lock, flags);
hba->clk_gating.delay_ms = UFS_QCOM_CLK_GATING_DELAY_MS_PERF;
spin_unlock_irqrestore(hba->host->host_lock, flags);
return 0;
}
@ -2388,6 +2406,11 @@ static int ufs_qcom_clk_scale_down_post_change(struct ufs_hba *hba)
struct ufs_clk_info *clki;
struct list_head *head = &hba->clk_list_head;
u32 curr_freq = 0;
unsigned long flags;
spin_lock_irqsave(hba->host->host_lock, flags);
hba->clk_gating.delay_ms = UFS_QCOM_CLK_GATING_DELAY_MS_PWR_SAVE;
spin_unlock_irqrestore(hba->host->host_lock, flags);
if (!ufs_qcom_cap_qunipro(host))
return 0;

5
drivers/scsi/ufs/ufs-qcom.h
View file

@ -52,6 +52,11 @@
#define UFS_QCOM_LIMIT_DESIRED_MODE FAST
#define UFS_QCOM_LIMIT_PHY_SUBMODE UFS_QCOM_PHY_SUBMODE_G4
/* default value of auto suspend is 3 seconds */
#define UFS_QCOM_AUTO_SUSPEND_DELAY 3000
#define UFS_QCOM_CLK_GATING_DELAY_MS_PWR_SAVE 10
#define UFS_QCOM_CLK_GATING_DELAY_MS_PERF 50
/* QCOM UFS host controller vendor specific registers */
enum {
REG_UFS_SYS1CLK_1US = 0xC0,