linux-kernel - [PATCH v3 2/3] clk: zynqmp: Use firmware specific divider clock flags

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Date:   Mon,  3 Aug 2020 23:44:16 -0700
From:   Amit Sunil Dhamne <amit.sunil.dhamne@...inx.com>
To:     mturquette@...libre.com, m.tretter@...gutronix.de,
        sboyd@...nel.org, michal.simek@...inx.com, mark.rutland@....com,
        linux-clk@...r.kernel.org
Cc:     rajanv@...inx.com, jollys@...inx.com, tejasp@...inx.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Rajan Vaja <rajan.vaja@...inx.com>,
        Tejas Patel <tejas.patel@...inx.com>,
        Amit Sunil Dhamne <amit.sunil.dhamne@...inx.com>
Subject: [PATCH v3 2/3] clk: zynqmp: Use firmware specific divider clock flags

From: Rajan Vaja <rajan.vaja@...inx.com>

Use ZynqMP specific divider clock flags instead of using CCF flags.

Signed-off-by: Rajan Vaja <rajan.vaja@...inx.com>
Signed-off-by: Tejas Patel <tejas.patel@...inx.com>
Signed-off-by: Amit Sunil Dhamne <amit.sunil.dhamne@...inx.com>
---
 drivers/clk/zynqmp/clk-zynqmp.h |  9 +++++++++
 drivers/clk/zynqmp/divider.c    | 24 +++++++++++++++++++++++-
 2 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/zynqmp/clk-zynqmp.h b/drivers/clk/zynqmp/clk-zynqmp.h
index 974d3da..9b2ff35e 100644
--- a/drivers/clk/zynqmp/clk-zynqmp.h
+++ b/drivers/clk/zynqmp/clk-zynqmp.h
@@ -32,6 +32,15 @@
 /* do not gate, ever */
 #define ZYNQMP_CLK_IS_CRITICAL         BIT(11)

+/* Type Flags for divider clock */
+#define ZYNQMP_CLK_DIVIDER_ONE_BASED           BIT(0)
+#define ZYNQMP_CLK_DIVIDER_POWER_OF_TWO                BIT(1)
+#define ZYNQMP_CLK_DIVIDER_ALLOW_ZERO          BIT(2)
+#define ZYNQMP_CLK_DIVIDER_HIWORD_MASK         BIT(3)
+#define ZYNQMP_CLK_DIVIDER_ROUND_CLOSEST       BIT(4)
+#define ZYNQMP_CLK_DIVIDER_READ_ONLY           BIT(5)
+#define ZYNQMP_CLK_DIVIDER_MAX_AT_ZERO         BIT(6)
+
 enum topology_type {
        TYPE_INVALID,
        TYPE_MUX,
diff --git a/drivers/clk/zynqmp/divider.c b/drivers/clk/zynqmp/divider.c
index 775d54f..3b8fad0 100644
--- a/drivers/clk/zynqmp/divider.c
+++ b/drivers/clk/zynqmp/divider.c
@@ -283,6 +283,28 @@ static u32 zynqmp_clk_get_max_divisor(u32 clk_id, u32 type)
        return ret_payload[1];
 }

+static inline unsigned long zynqmp_clk_map_divider_ccf_flags(
+                                              const u32 zynqmp_type_flag)
+{
+       unsigned long ccf_flag = 0;
+
+       ccf_flag |= (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_ONE_BASED) ?
+                     CLK_DIVIDER_ONE_BASED : 0;
+       ccf_flag |= (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_POWER_OF_TWO) ?
+                     CLK_DIVIDER_POWER_OF_TWO : 0;
+       ccf_flag |= (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_ALLOW_ZERO) ?
+                     CLK_DIVIDER_ALLOW_ZERO : 0;
+       ccf_flag |= (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_POWER_OF_TWO) ?
+                     CLK_DIVIDER_HIWORD_MASK : 0;
+       ccf_flag |= (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_ROUND_CLOSEST) ?
+                     CLK_DIVIDER_ROUND_CLOSEST : 0;
+       ccf_flag |= (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_READ_ONLY) ?
+                     CLK_DIVIDER_READ_ONLY : 0;
+       ccf_flag |= (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_MAX_AT_ZERO) ?
+                     CLK_DIVIDER_MAX_AT_ZERO : 0;
+       return ccf_flag;
+}
+
 /**
  * zynqmp_clk_register_divider() - Register a divider clock
  * @name:              Name of this clock
@@ -320,7 +342,7 @@ struct clk_hw *zynqmp_clk_register_divider(const char *name,
        /* struct clk_divider assignments */
        div->is_frac = !!((nodes->flag & CLK_FRAC) |
                          (nodes->custom_type_flag & CUSTOM_FLAG_CLK_FRAC));
-       div->flags = nodes->type_flag;
+       div->flags = zynqmp_clk_map_divider_ccf_flags(nodes->type_flag);
        div->hw.init = &init;
        div->clk_id = clk_id;
        div->div_type = nodes->type;
--
2.7.4

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