clk: sunxi-ng: a83t: Add support for A83T's PRCM

The A83T's PRCM has the same set of clocks and resets as the A64.
However, a few dividers are different. And due to the lack of a low
speed 32.768 kHz oscillator, a few of the clock parents are different.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

1 files changed, 107 insertions, 0 deletions

diff --git a/drivers/clk/sunxi-ng/ccu-sun8i-r.c b/drivers/clk/sunxi-ng/ccu-sun8i-r.c
index de02be75785c..e54816ec1dbe 100644
--- a/drivers/clk/sunxi-ng/ccu-sun8i-r.c
+++ b/drivers/clk/sunxi-ng/ccu-sun8i-r.c
@@ -27,6 +27,8 @@
 
 static const char * const ar100_parents[] = { "osc32k", "osc24M",
                                              "pll-periph0", "iosc" };
+static const char * const a83t_ar100_parents[] = { "osc16M-d512", "osc24M",
+                                                   "pll-periph0", "iosc" };
 static const struct ccu_mux_var_prediv ar100_predivs[] = {
         { .index = 2, .shift = 8, .width = 5 },
 };
@@ -52,6 +54,27 @@ static struct ccu_div ar100_clk = {
         },
 };
 
+static struct ccu_div a83t_ar100_clk = {
+        .div            = _SUNXI_CCU_DIV_FLAGS(4, 2, CLK_DIVIDER_POWER_OF_TWO),
+
+        .mux            = {
+                .shift  = 16,
+                .width  = 2,
+
+                .var_predivs    = ar100_predivs,
+                .n_var_predivs  = ARRAY_SIZE(ar100_predivs),
+        },
+
+        .common         = {
+                .reg            = 0x00,
+                .features       = CCU_FEATURE_VARIABLE_PREDIV,
+                .hw.init        = CLK_HW_INIT_PARENTS("ar100",
+                                                      a83t_ar100_parents,
+                                                      &ccu_div_ops,
+                                                      0),
+        },
+};
+
 static CLK_FIXED_FACTOR(ahb0_clk, "ahb0", "ar100", 1, 1, 0);
 
 static struct ccu_div apb0_clk = {
@@ -66,6 +89,8 @@ static struct ccu_div apb0_clk = {
         },
 };
 
+static SUNXI_CCU_M(a83t_apb0_clk, "apb0", "ahb0", 0x0c, 0, 2, 0);
+
 static SUNXI_CCU_GATE(apb0_pio_clk,     "apb0-pio",     "apb0",
                       0x28, BIT(0), 0);
 static SUNXI_CCU_GATE(apb0_ir_clk,      "apb0-ir",      "apb0",
@@ -90,6 +115,46 @@ static SUNXI_CCU_MP_WITH_MUX_GATE(ir_clk, "ir",
                                   BIT(31),      /* gate */
                                   0);
 
+static const char *const a83t_r_mod0_parents[] = { "osc16M", "osc24M" };
+static const struct ccu_mux_fixed_prediv a83t_ir_predivs[] = {
+        { .index = 0, .div = 16 },
+};
+static struct ccu_mp a83t_ir_clk = {
+        .enable = BIT(31),
+
+        .m      = _SUNXI_CCU_DIV(0, 4),
+        .p      = _SUNXI_CCU_DIV(16, 2),
+
+        .mux    = {
+                .shift  = 24,
+                .width  = 2,
+                .fixed_predivs  = a83t_ir_predivs,
+                .n_predivs      = ARRAY_SIZE(a83t_ir_predivs),
+        },
+
+        .common         = {
+                .reg            = 0x54,
+                .features       = CCU_FEATURE_VARIABLE_PREDIV,
+                .hw.init        = CLK_HW_INIT_PARENTS("ir",
+                                                      a83t_r_mod0_parents,
+                                                      &ccu_mp_ops,
+                                                      0),
+        },
+};
+
+static struct ccu_common *sun8i_a83t_r_ccu_clks[] = {
+        &a83t_ar100_clk.common,
+        &a83t_apb0_clk.common,
+        &apb0_pio_clk.common,
+        &apb0_ir_clk.common,
+        &apb0_timer_clk.common,
+        &apb0_rsb_clk.common,
+        &apb0_uart_clk.common,
+        &apb0_i2c_clk.common,
+        &apb0_twd_clk.common,
+        &a83t_ir_clk.common,
+};
+
 static struct ccu_common *sun8i_h3_r_ccu_clks[] = {
         &ar100_clk.common,
         &apb0_clk.common,
@@ -115,6 +180,23 @@ static struct ccu_common *sun50i_a64_r_ccu_clks[] = {
         &ir_clk.common,
 };
 
+static struct clk_hw_onecell_data sun8i_a83t_r_hw_clks = {
+        .hws    = {
+                [CLK_AR100]             = &a83t_ar100_clk.common.hw,
+                [CLK_AHB0]              = &ahb0_clk.hw,
+                [CLK_APB0]              = &a83t_apb0_clk.common.hw,
+                [CLK_APB0_PIO]          = &apb0_pio_clk.common.hw,
+                [CLK_APB0_IR]           = &apb0_ir_clk.common.hw,
+                [CLK_APB0_TIMER]        = &apb0_timer_clk.common.hw,
+                [CLK_APB0_RSB]          = &apb0_rsb_clk.common.hw,
+                [CLK_APB0_UART]         = &apb0_uart_clk.common.hw,
+                [CLK_APB0_I2C]          = &apb0_i2c_clk.common.hw,
+                [CLK_APB0_TWD]          = &apb0_twd_clk.common.hw,
+                [CLK_IR]                = &a83t_ir_clk.common.hw,
+        },
+        .num    = CLK_NUMBER,
+};
+
 static struct clk_hw_onecell_data sun8i_h3_r_hw_clks = {
         .hws    = {
                 [CLK_AR100]             = &ar100_clk.common.hw,
@@ -148,6 +230,14 @@ static struct clk_hw_onecell_data sun50i_a64_r_hw_clks = {
         .num    = CLK_NUMBER,
 };
 
+static struct ccu_reset_map sun8i_a83t_r_ccu_resets[] = {
+        [RST_APB0_IR]           =  { 0xb0, BIT(1) },
+        [RST_APB0_TIMER]        =  { 0xb0, BIT(2) },
+        [RST_APB0_RSB]          =  { 0xb0, BIT(3) },
+        [RST_APB0_UART]         =  { 0xb0, BIT(4) },
+        [RST_APB0_I2C]          =  { 0xb0, BIT(6) },
+};
+
 static struct ccu_reset_map sun8i_h3_r_ccu_resets[] = {
         [RST_APB0_IR]           =  { 0xb0, BIT(1) },
         [RST_APB0_TIMER]        =  { 0xb0, BIT(2) },
@@ -163,6 +253,16 @@ static struct ccu_reset_map sun50i_a64_r_ccu_resets[] = {
         [RST_APB0_I2C]          =  { 0xb0, BIT(6) },
 };
 
+static const struct sunxi_ccu_desc sun8i_a83t_r_ccu_desc = {
+        .ccu_clks       = sun8i_a83t_r_ccu_clks,
+        .num_ccu_clks   = ARRAY_SIZE(sun8i_a83t_r_ccu_clks),
+
+        .hw_clks        = &sun8i_a83t_r_hw_clks,
+
+        .resets         = sun8i_a83t_r_ccu_resets,
+        .num_resets     = ARRAY_SIZE(sun8i_a83t_r_ccu_resets),
+};
+
 static const struct sunxi_ccu_desc sun8i_h3_r_ccu_desc = {
         .ccu_clks       = sun8i_h3_r_ccu_clks,
         .num_ccu_clks   = ARRAY_SIZE(sun8i_h3_r_ccu_clks),
@@ -198,6 +298,13 @@ static void __init sunxi_r_ccu_init(struct device_node *node,
         sunxi_ccu_probe(node, reg, desc);
 }
 
+static void __init sun8i_a83t_r_ccu_setup(struct device_node *node)
+{
+        sunxi_r_ccu_init(node, &sun8i_a83t_r_ccu_desc);
+}
+CLK_OF_DECLARE(sun8i_a83t_r_ccu, "allwinner,sun8i-a83t-r-ccu",
+               sun8i_a83t_r_ccu_setup);
+
 static void __init sun8i_h3_r_ccu_setup(struct device_node *node)
 {
         sunxi_r_ccu_init(node, &sun8i_h3_r_ccu_desc);