lkml.org 
[lkml]   [2019]   [Oct]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 2/2] clk: aspeed: Add RMII RCLK gates for both AST2500 MACs
Date
RCLK is a fixed 50MHz clock derived from HPLL that is described by a
single gate for each MAC.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
---
v2: Drop "-gate" from clock names

drivers/clk/clk-aspeed.c | 27 ++++++++++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/clk-aspeed.c b/drivers/clk/clk-aspeed.c
index abf06fb6453e..411ff5fb2c07 100644
--- a/drivers/clk/clk-aspeed.c
+++ b/drivers/clk/clk-aspeed.c
@@ -14,7 +14,7 @@

#include "clk-aspeed.h"

-#define ASPEED_NUM_CLKS 36
+#define ASPEED_NUM_CLKS 38

#define ASPEED_RESET2_OFFSET 32

@@ -28,6 +28,7 @@
#define AST2400_HPLL_BYPASS_EN BIT(17)
#define ASPEED_MISC_CTRL 0x2c
#define UART_DIV13_EN BIT(12)
+#define ASPEED_MAC_CLK_DLY 0x48
#define ASPEED_STRAP 0x70
#define CLKIN_25MHZ_EN BIT(23)
#define AST2400_CLK_SOURCE_SEL BIT(18)
@@ -462,6 +463,30 @@ static int aspeed_clk_probe(struct platform_device *pdev)
return PTR_ERR(hw);
aspeed_clk_data->hws[ASPEED_CLK_MAC] = hw;

+ if (of_device_is_compatible(pdev->dev.of_node, "aspeed,ast2500-scu")) {
+ /* RMII 50MHz RCLK */
+ hw = clk_hw_register_fixed_rate(dev, "mac12rclk", "hpll", 0,
+ 50000000);
+ if (IS_ERR(hw))
+ return PTR_ERR(hw);
+
+ /* RMII1 50MHz (RCLK) output enable */
+ hw = clk_hw_register_gate(dev, "mac1rclk", "mac12rclk", 0,
+ scu_base + ASPEED_MAC_CLK_DLY, 29, 0,
+ &aspeed_clk_lock);
+ if (IS_ERR(hw))
+ return PTR_ERR(hw);
+ aspeed_clk_data->hws[ASPEED_CLK_MAC1RCLK] = hw;
+
+ /* RMII2 50MHz (RCLK) output enable */
+ hw = clk_hw_register_gate(dev, "mac2rclk", "mac12rclk", 0,
+ scu_base + ASPEED_MAC_CLK_DLY, 30, 0,
+ &aspeed_clk_lock);
+ if (IS_ERR(hw))
+ return PTR_ERR(hw);
+ aspeed_clk_data->hws[ASPEED_CLK_MAC2RCLK] = hw;
+ }
+
/* LPC Host (LHCLK) clock divider */
hw = clk_hw_register_divider_table(dev, "lhclk", "hpll", 0,
scu_base + ASPEED_CLK_SELECTION, 20, 3, 0,
--
2.20.1
\
 
 \ /
  Last update: 2019-10-10 04:08    [W:0.036 / U:6.988 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site