From 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:44:59 +0000
Subject: [PATCH] gmac get mac form eeprom
---
kernel/drivers/clk/at91/clk-utmi.c | 135 ++++++++++++++++++++++++++++++---------------
1 files changed, 90 insertions(+), 45 deletions(-)
diff --git a/kernel/drivers/clk/at91/clk-utmi.c b/kernel/drivers/clk/at91/clk-utmi.c
index e4dc837..df9f3fc 100644
--- a/kernel/drivers/clk/at91/clk-utmi.c
+++ b/kernel/drivers/clk/at91/clk-utmi.c
@@ -1,11 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
*/
#include <linux/clk-provider.h>
@@ -126,12 +121,14 @@
};
static struct clk_hw * __init
-at91_clk_register_utmi(struct regmap *regmap_pmc, struct regmap *regmap_sfr,
- const char *name, const char *parent_name)
+at91_clk_register_utmi_internal(struct regmap *regmap_pmc,
+ struct regmap *regmap_sfr,
+ const char *name, const char *parent_name,
+ const struct clk_ops *ops, unsigned long flags)
{
struct clk_utmi *utmi;
struct clk_hw *hw;
- struct clk_init_data init = {};
+ struct clk_init_data init;
int ret;
utmi = kzalloc(sizeof(*utmi), GFP_KERNEL);
@@ -139,10 +136,10 @@
return ERR_PTR(-ENOMEM);
init.name = name;
- init.ops = &utmi_ops;
+ init.ops = ops;
init.parent_names = parent_name ? &parent_name : NULL;
init.num_parents = parent_name ? 1 : 0;
- init.flags = CLK_SET_RATE_GATE;
+ init.flags = flags;
utmi->hw.init = &init;
utmi->regmap_pmc = regmap_pmc;
@@ -158,45 +155,93 @@
return hw;
}
-static void __init of_at91sam9x5_clk_utmi_setup(struct device_node *np)
+struct clk_hw * __init
+at91_clk_register_utmi(struct regmap *regmap_pmc, struct regmap *regmap_sfr,
+ const char *name, const char *parent_name)
{
- struct clk_hw *hw;
- const char *parent_name;
- const char *name = np->name;
- struct regmap *regmap_pmc, *regmap_sfr;
+ return at91_clk_register_utmi_internal(regmap_pmc, regmap_sfr, name,
+ parent_name, &utmi_ops, CLK_SET_RATE_GATE);
+}
- parent_name = of_clk_get_parent_name(np, 0);
+static int clk_utmi_sama7g5_prepare(struct clk_hw *hw)
+{
+ struct clk_utmi *utmi = to_clk_utmi(hw);
+ struct clk_hw *hw_parent;
+ unsigned long parent_rate;
+ unsigned int val;
- of_property_read_string(np, "clock-output-names", &name);
+ hw_parent = clk_hw_get_parent(hw);
+ parent_rate = clk_hw_get_rate(hw_parent);
- regmap_pmc = syscon_node_to_regmap(of_get_parent(np));
- if (IS_ERR(regmap_pmc))
- return;
-
- /*
- * If the device supports different mainck rates, this value has to be
- * set in the UTMI Clock Trimming register.
- * - 9x5: mainck supports several rates but it is indicated that a
- * 12 MHz is needed in case of USB.
- * - sama5d3 and sama5d2: mainck supports several rates. Configuring
- * the FREQ field of the UTMI Clock Trimming register is mandatory.
- * - sama5d4: mainck is at 12 MHz.
- *
- * We only need to retrieve sama5d3 or sama5d2 sfr regmap.
- */
- regmap_sfr = syscon_regmap_lookup_by_compatible("atmel,sama5d3-sfr");
- if (IS_ERR(regmap_sfr)) {
- regmap_sfr = syscon_regmap_lookup_by_compatible("atmel,sama5d2-sfr");
- if (IS_ERR(regmap_sfr))
- regmap_sfr = NULL;
+ switch (parent_rate) {
+ case 16000000:
+ val = 0;
+ break;
+ case 20000000:
+ val = 2;
+ break;
+ case 24000000:
+ val = 3;
+ break;
+ case 32000000:
+ val = 5;
+ break;
+ default:
+ pr_err("UTMICK: unsupported main_xtal rate\n");
+ return -EINVAL;
}
- hw = at91_clk_register_utmi(regmap_pmc, regmap_sfr, name, parent_name);
- if (IS_ERR(hw))
- return;
+ regmap_write(utmi->regmap_pmc, AT91_PMC_XTALF, val);
- of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw);
- return;
+ return 0;
+
}
-CLK_OF_DECLARE(at91sam9x5_clk_utmi, "atmel,at91sam9x5-clk-utmi",
- of_at91sam9x5_clk_utmi_setup);
+
+static int clk_utmi_sama7g5_is_prepared(struct clk_hw *hw)
+{
+ struct clk_utmi *utmi = to_clk_utmi(hw);
+ struct clk_hw *hw_parent;
+ unsigned long parent_rate;
+ unsigned int val;
+
+ hw_parent = clk_hw_get_parent(hw);
+ parent_rate = clk_hw_get_rate(hw_parent);
+
+ regmap_read(utmi->regmap_pmc, AT91_PMC_XTALF, &val);
+ switch (val & 0x7) {
+ case 0:
+ if (parent_rate == 16000000)
+ return 1;
+ break;
+ case 2:
+ if (parent_rate == 20000000)
+ return 1;
+ break;
+ case 3:
+ if (parent_rate == 24000000)
+ return 1;
+ break;
+ case 5:
+ if (parent_rate == 32000000)
+ return 1;
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static const struct clk_ops sama7g5_utmi_ops = {
+ .prepare = clk_utmi_sama7g5_prepare,
+ .is_prepared = clk_utmi_sama7g5_is_prepared,
+ .recalc_rate = clk_utmi_recalc_rate,
+};
+
+struct clk_hw * __init
+at91_clk_sama7g5_register_utmi(struct regmap *regmap_pmc, const char *name,
+ const char *parent_name)
+{
+ return at91_clk_register_utmi_internal(regmap_pmc, NULL, name,
+ parent_name, &sama7g5_utmi_ops, 0);
+}
--
Gitblit v1.6.2