Re: [PATCH v1 1/4] clk: qcom: gdsc: Add support to enable retention of GSDCR

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Hello Stephen,

Thanks for the review.

On 4/10/2020 1:36 AM, Stephen Boyd wrote:
Quoting Taniya Das (2020-03-27 12:48:02)
diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c
index a250f59..cfe908f 100644
--- a/drivers/clk/qcom/gdsc.c
+++ b/drivers/clk/qcom/gdsc.c
@@ -28,6 +28,7 @@
  /* CFG_GDSCR */
  #define GDSC_POWER_UP_COMPLETE         BIT(16)
  #define GDSC_POWER_DOWN_COMPLETE       BIT(15)
+#define GDSC_RETAIN_FF_ENABLE          BIT(11)
  #define CFG_GDSCR_OFFSET               0x4

  /* Wait 2^n CXO cycles between all states. Here, n=2 (4 cycles). */
@@ -202,6 +203,14 @@ static inline void gdsc_assert_reset_aon(struct gdsc *sc)
         regmap_update_bits(sc->regmap, sc->clamp_io_ctrl,
                            GMEM_RESET_MASK, 0);
  }
+
+static inline void gdsc_retain_ff_on(struct gdsc *sc)

Drop inline please.


Will drop in the next patch.

+{
+       u32 mask = RETAIN_FF_ENABLE;

Is this supposed to be GDSC_RETAIN_FF_ENABLE?


Will update in next patch.

+
+       regmap_update_bits(sc->regmap, sc->gdscr, mask, mask);
+}
+
  static int gdsc_enable(struct generic_pm_domain *domain)
  {
         struct gdsc *sc = domain_to_gdsc(domain);
@@ -254,6 +263,9 @@ static int gdsc_enable(struct generic_pm_domain *domain)
                 udelay(1);
         }

+       if (sc->flags & RETAIN_FF_ENABLE)
+               gdsc_retain_ff_on(sc);
+
         return 0;
  }

diff --git a/drivers/clk/qcom/gdsc.h b/drivers/clk/qcom/gdsc.h
index 64cdc8c..8604d44 100644
--- a/drivers/clk/qcom/gdsc.h
+++ b/drivers/clk/qcom/gdsc.h
@@ -49,6 +49,7 @@ struct gdsc {
  #define AON_RESET      BIT(4)
  #define POLL_CFG_GDSCR BIT(5)
  #define ALWAYS_ON      BIT(6)
+#define RETAIN_FF_ENABLE       BIT(7)

This is a flag, not a register bit presumably.

Yes, it is a flag.


         struct reset_controller_dev     *rcdev;
         unsigned int                    *resets;
         unsigned int                    reset_count;

--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation.

--



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