clk: aspeed: Add RMII RCLK gates for both AST2500 MACs

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>
Link: https://lkml.kernel.org/r/20191010020655.3776-3-andrew@aj.id.au
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/drivers/clk/clk-aspeed.c b/drivers/clk/clk-aspeed.c
index abf06fb..411ff5f 100644 (file)
--- 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,