diff options
| author | Andrew Jeffery <andrew@aj.id.au> | 2019-10-10 05:06:55 +0300 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2019-11-26 21:02:48 +0300 |
| commit | 801b787a693ba643b23608cf2bf8dcfab3608795 (patch) | |
| tree | 4fe5be9b06248ae006cd17eebfde32c9cd5ec0a8 /drivers/clk | |
| parent | 3696eebd810cf084b3662d3c3b85cd84b61090f3 (diff) | |
| download | linux-801b787a693ba643b23608cf2bf8dcfab3608795.tar.xz | |
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>
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/clk-aspeed.c | 27 |
1 files changed, 26 insertions, 1 deletions
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, |