linux-kernel - [RFC 09/12] clk: qcom: support for Brammo PLL

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Message-Id: <1501153825-5181-10-git-send-email-absahu@codeaurora.org>
Date:   Thu, 27 Jul 2017 16:40:22 +0530
From:   Abhishek Sahu <absahu@...eaurora.org>
To:     sboyd@...eaurora.org, mturquette@...libre.com
Cc:     andy.gross@...aro.org, david.brown@...aro.org,
        rnayak@...eaurora.org, linux-arm-msm@...r.kernel.org,
        linux-soc@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, Abhishek Sahu <absahu@...eaurora.org>
Subject: [RFC 09/12] clk: qcom: support for Brammo PLL

Brammo PLL does not allow configuration of VCO and it
supports the dynamic update in which the frequency can
be changed dynamically without turning off the PLL.

Signed-off-by: Abhishek Sahu <absahu@...eaurora.org>
---
 drivers/clk/qcom/clk-alpha-pll.c | 12 ++++++++++++
 drivers/clk/qcom/clk-alpha-pll.h |  2 ++
 2 files changed, 14 insertions(+)

diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index d17d83a..e37a3ab 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -52,6 +52,7 @@
 #define PLL_HUAYRA_N_MASK		0xff
 #define PLL_HUAYRA_ALPHA_WIDTH		16
 
+#define PLL_BRAMMO_ALPHA_BITWIDTH	40
 /*
  * Even though 40 bits are present, use only 32 for ease of calculation.
  */
@@ -105,6 +106,17 @@
 	[ALPHA_PLL_STATUS] = 0x24,
 };
 
+const u8 brammo_pll_offsets[] = {
+	[ALPHA_PLL_MODE] = 0x00,
+	[ALPHA_PLL_L_VAL] = 0x04,
+	[ALPHA_PLL_ALPHA_VAL] = 0x08,
+	[ALPHA_PLL_ALPHA_VAL_U] = 0x0c,
+	[ALPHA_PLL_USER_CTL] = 0x10,
+	[ALPHA_PLL_CONFIG_CTL] = 0x18,
+	[ALPHA_PLL_TEST_CTL] = 0x1c,
+	[ALPHA_PLL_STATUS] = 0x24,
+};
+
 static int wait_for_pll(struct clk_alpha_pll *pll, u32 mask, bool inverse,
 			const char *action)
 {
diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h
index c98e7469..891d14b 100644
--- a/drivers/clk/qcom/clk-alpha-pll.h
+++ b/drivers/clk/qcom/clk-alpha-pll.h
@@ -64,6 +64,7 @@ struct clk_alpha_pll {
 #define CLK_HUAYRA_PLL_FLAGS	(HAVE_NO_VCO_CONF | SUPPORTS_DYNAMIC_UPDATE | \
 				 SUPPORTS_64BIT_CONFIG_CTL |		      \
 				 SUPPORTS_16BIT_ALPHA)
+#define CLK_BRAMMO_PLL_FLAGS	(HAVE_NO_VCO_CONF | SUPPORTS_DYNAMIC_UPDATE)
 
 /**
  * struct clk_alpha_pll_postdiv - phase locked loop (PLL) post-divider
@@ -102,6 +103,7 @@ struct alpha_pll_config {
 
 extern const u8 alpha_pll_offsets[];
 extern const u8 huayra_pll_offsets[];
+extern const u8 brammo_pll_offsets[];
 
 extern const struct clk_ops clk_alpha_pll_ops;
 extern const struct clk_ops clk_alpha_pll_hwfsm_ops;
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation