clk: stm32: Introduce clocks of STM32F769 board

STM32F769 clocks are derived from STM32746 clocks.
main differences are:
- new source clock for SAI1 and SAI2 (HSI or HSE)
- Add DFSDM & DSI clocks

Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

3 files changed, 310 insertions, 10 deletions

diff --git a/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt b/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt
index b240121d2ac9..cfa04b614d8a 100644
--- a/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt
+++ b/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt
@@ -11,6 +11,8 @@ Required properties:
   "st,stm32f42xx-rcc"
   "st,stm32f469-rcc"
   "st,stm32f746-rcc"
+  "st,stm32f769-rcc"
+
 - reg: should be register base and length as documented in the
   datasheet
 - #reset-cells: 1, see below
@@ -102,6 +104,10 @@ The secondary index is bound with the following magic numbers:
         28      CLK_I2C3
         29      CLK_I2C4
         30      CLK_LPTIMER     (LPTimer1 clock)
+        31      CLK_PLL_SRC
+        32      CLK_DFSDM1
+        33      CLK_ADFSDM1
+        34      CLK_F769_DSI
 )
 
 Example:
diff --git a/drivers/clk/clk-stm32f4.c b/drivers/clk/clk-stm32f4.c
index cdaa567c8042..fdac33a9be2f 100644
--- a/drivers/clk/clk-stm32f4.c
+++ b/drivers/clk/clk-stm32f4.c
@@ -300,6 +300,85 @@ static const struct stm32f4_gate_data stm32f746_gates[] __initconst = {
         { STM32F4_RCC_APB2ENR, 26,      "ltdc",         "apb2_div" },
 };
 
+static const struct stm32f4_gate_data stm32f769_gates[] __initconst = {
+        { STM32F4_RCC_AHB1ENR,  0,      "gpioa",        "ahb_div" },
+        { STM32F4_RCC_AHB1ENR,  1,      "gpiob",        "ahb_div" },
+        { STM32F4_RCC_AHB1ENR,  2,      "gpioc",        "ahb_div" },
+        { STM32F4_RCC_AHB1ENR,  3,      "gpiod",        "ahb_div" },
+        { STM32F4_RCC_AHB1ENR,  4,      "gpioe",        "ahb_div" },
+        { STM32F4_RCC_AHB1ENR,  5,      "gpiof",        "ahb_div" },
+        { STM32F4_RCC_AHB1ENR,  6,      "gpiog",        "ahb_div" },
+        { STM32F4_RCC_AHB1ENR,  7,      "gpioh",        "ahb_div" },
+        { STM32F4_RCC_AHB1ENR,  8,      "gpioi",        "ahb_div" },
+        { STM32F4_RCC_AHB1ENR,  9,      "gpioj",        "ahb_div" },
+        { STM32F4_RCC_AHB1ENR, 10,      "gpiok",        "ahb_div" },
+        { STM32F4_RCC_AHB1ENR, 12,      "crc",          "ahb_div" },
+        { STM32F4_RCC_AHB1ENR, 18,      "bkpsra",       "ahb_div" },
+        { STM32F4_RCC_AHB1ENR, 20,      "dtcmram",      "ahb_div" },
+        { STM32F4_RCC_AHB1ENR, 21,      "dma1",         "ahb_div" },
+        { STM32F4_RCC_AHB1ENR, 22,      "dma2",         "ahb_div" },
+        { STM32F4_RCC_AHB1ENR, 23,      "dma2d",        "ahb_div" },
+        { STM32F4_RCC_AHB1ENR, 25,      "ethmac",       "ahb_div" },
+        { STM32F4_RCC_AHB1ENR, 26,      "ethmactx",     "ahb_div" },
+        { STM32F4_RCC_AHB1ENR, 27,      "ethmacrx",     "ahb_div" },
+        { STM32F4_RCC_AHB1ENR, 28,      "ethmacptp",    "ahb_div" },
+        { STM32F4_RCC_AHB1ENR, 29,      "otghs",        "ahb_div" },
+        { STM32F4_RCC_AHB1ENR, 30,      "otghsulpi",    "ahb_div" },
+
+        { STM32F4_RCC_AHB2ENR,  0,      "dcmi",         "ahb_div" },
+        { STM32F4_RCC_AHB2ENR,  1,      "jpeg",         "ahb_div" },
+        { STM32F4_RCC_AHB2ENR,  4,      "cryp",         "ahb_div" },
+        { STM32F4_RCC_AHB2ENR,  5,      "hash",         "ahb_div" },
+        { STM32F4_RCC_AHB2ENR,  6,      "rng",          "pll48"   },
+        { STM32F4_RCC_AHB2ENR,  7,      "otgfs",        "pll48"   },
+
+        { STM32F4_RCC_AHB3ENR,  0,      "fmc",          "ahb_div",
+                CLK_IGNORE_UNUSED },
+        { STM32F4_RCC_AHB3ENR,  1,      "qspi",         "ahb_div",
+                CLK_IGNORE_UNUSED },
+
+        { STM32F4_RCC_APB1ENR,  0,      "tim2",         "apb1_mul" },
+        { STM32F4_RCC_APB1ENR,  1,      "tim3",         "apb1_mul" },
+        { STM32F4_RCC_APB1ENR,  2,      "tim4",         "apb1_mul" },
+        { STM32F4_RCC_APB1ENR,  3,      "tim5",         "apb1_mul" },
+        { STM32F4_RCC_APB1ENR,  4,      "tim6",         "apb1_mul" },
+        { STM32F4_RCC_APB1ENR,  5,      "tim7",         "apb1_mul" },
+        { STM32F4_RCC_APB1ENR,  6,      "tim12",        "apb1_mul" },
+        { STM32F4_RCC_APB1ENR,  7,      "tim13",        "apb1_mul" },
+        { STM32F4_RCC_APB1ENR,  8,      "tim14",        "apb1_mul" },
+        { STM32F4_RCC_APB1ENR, 10,      "rtcapb",       "apb1_mul" },
+        { STM32F4_RCC_APB1ENR, 11,      "wwdg",         "apb1_div" },
+        { STM32F4_RCC_APB1ENR, 13,      "can3",         "apb1_div" },
+        { STM32F4_RCC_APB1ENR, 14,      "spi2",         "apb1_div" },
+        { STM32F4_RCC_APB1ENR, 15,      "spi3",         "apb1_div" },
+        { STM32F4_RCC_APB1ENR, 16,      "spdifrx",      "apb1_div" },
+        { STM32F4_RCC_APB1ENR, 25,      "can1",         "apb1_div" },
+        { STM32F4_RCC_APB1ENR, 26,      "can2",         "apb1_div" },
+        { STM32F4_RCC_APB1ENR, 27,      "cec",          "apb1_div" },
+        { STM32F4_RCC_APB1ENR, 28,      "pwr",          "apb1_div" },
+        { STM32F4_RCC_APB1ENR, 29,      "dac",          "apb1_div" },
+
+        { STM32F4_RCC_APB2ENR,  0,      "tim1",         "apb2_mul" },
+        { STM32F4_RCC_APB2ENR,  1,      "tim8",         "apb2_mul" },
+        { STM32F4_RCC_APB2ENR,  7,      "sdmmc2",       "sdmux2" },
+        { STM32F4_RCC_APB2ENR,  8,      "adc1",         "apb2_div" },
+        { STM32F4_RCC_APB2ENR,  9,      "adc2",         "apb2_div" },
+        { STM32F4_RCC_APB2ENR, 10,      "adc3",         "apb2_div" },
+        { STM32F4_RCC_APB2ENR, 11,      "sdmmc1",       "sdmux1" },
+        { STM32F4_RCC_APB2ENR, 12,      "spi1",         "apb2_div" },
+        { STM32F4_RCC_APB2ENR, 13,      "spi4",         "apb2_div" },
+        { STM32F4_RCC_APB2ENR, 14,      "syscfg",       "apb2_div" },
+        { STM32F4_RCC_APB2ENR, 16,      "tim9",         "apb2_mul" },
+        { STM32F4_RCC_APB2ENR, 17,      "tim10",        "apb2_mul" },
+        { STM32F4_RCC_APB2ENR, 18,      "tim11",        "apb2_mul" },
+        { STM32F4_RCC_APB2ENR, 20,      "spi5",         "apb2_div" },
+        { STM32F4_RCC_APB2ENR, 21,      "spi6",         "apb2_div" },
+        { STM32F4_RCC_APB2ENR, 22,      "sai1",         "apb2_div" },
+        { STM32F4_RCC_APB2ENR, 23,      "sai2",         "apb2_div" },
+        { STM32F4_RCC_APB2ENR, 26,      "ltdc",         "apb2_div" },
+        { STM32F4_RCC_APB2ENR, 30,      "mdio",         "apb2_div" },
+};
+
 /*
  * This bitmask tells us which bit offsets (0..192) on STM32F4[23]xxx
  * have gate bits associated with them. Its combined hweight is 71.
@@ -318,6 +397,10 @@ static const u64 stm32f746_gate_map[MAX_GATE_MAP] = { 0x000000f17ef417ffull,
                                                       0x0000000000000003ull,
                                                       0x04f77f833e01c9ffull };
 
+static const u64 stm32f769_gate_map[MAX_GATE_MAP] = { 0x000000f37ef417ffull,
+                                                      0x0000000000000003ull,
+                                                      0x44F77F833E01EDFFull };
+
 static const u64 *stm32f4_gate_map;
 
 static struct clk_hw **clks;
@@ -1048,6 +1131,10 @@ static const char *rtc_parents[4] = {
         "no-clock", "lse", "lsi", "hse-rtc"
 };
 
+static const char *pll_src = "pll-src";
+
+static const char *pllsrc_parent[2] = { "hsi", NULL };
+
 static const char *dsi_parent[2] = { NULL, "pll-r" };
 
 static const char *lcd_parent[1] = { "pllsai-r-div" };
@@ -1072,6 +1159,9 @@ static const char *uart_parents2[4] = { "apb1_div", "sys", "hsi", "lse" };
 
 static const char *i2c_parents[4] = { "apb1_div", "sys", "hsi", "no-clock" };
 
+static const char * const dfsdm1_src[] = { "apb2_div", "sys" };
+static const char * const adsfdm1_parent[] = { "sai1_clk", "sai2_clk" };
+
 struct stm32_aux_clk {
         int idx;
         const char *name;
@@ -1313,6 +1403,177 @@ static const struct stm32_aux_clk stm32f746_aux_clk[] = {
         },
 };
 
+static const struct stm32_aux_clk stm32f769_aux_clk[] = {
+        {
+                CLK_LCD, "lcd-tft", lcd_parent, ARRAY_SIZE(lcd_parent),
+                NO_MUX, 0, 0,
+                STM32F4_RCC_APB2ENR, 26,
+                CLK_SET_RATE_PARENT
+        },
+        {
+                CLK_I2S, "i2s", i2s_parents, ARRAY_SIZE(i2s_parents),
+                STM32F4_RCC_CFGR, 23, 1,
+                NO_GATE, 0,
+                CLK_SET_RATE_PARENT
+        },
+        {
+                CLK_SAI1, "sai1_clk", sai_parents, ARRAY_SIZE(sai_parents),
+                STM32F4_RCC_DCKCFGR, 20, 3,
+                STM32F4_RCC_APB2ENR, 22,
+                CLK_SET_RATE_PARENT
+        },
+        {
+                CLK_SAI2, "sai2_clk", sai_parents, ARRAY_SIZE(sai_parents),
+                STM32F4_RCC_DCKCFGR, 22, 3,
+                STM32F4_RCC_APB2ENR, 23,
+                CLK_SET_RATE_PARENT
+        },
+        {
+                NO_IDX, "pll48", pll48_parents, ARRAY_SIZE(pll48_parents),
+                STM32F7_RCC_DCKCFGR2, 27, 1,
+                NO_GATE, 0,
+                0
+        },
+        {
+                NO_IDX, "sdmux1", sdmux_parents, ARRAY_SIZE(sdmux_parents),
+                STM32F7_RCC_DCKCFGR2, 28, 1,
+                NO_GATE, 0,
+                0
+        },
+        {
+                NO_IDX, "sdmux2", sdmux_parents, ARRAY_SIZE(sdmux_parents),
+                STM32F7_RCC_DCKCFGR2, 29, 1,
+                NO_GATE, 0,
+                0
+        },
+        {
+                CLK_HDMI_CEC, "hdmi-cec",
+                hdmi_parents, ARRAY_SIZE(hdmi_parents),
+                STM32F7_RCC_DCKCFGR2, 26, 1,
+                NO_GATE, 0,
+                0
+        },
+        {
+                CLK_SPDIF, "spdif-rx",
+                spdif_parent, ARRAY_SIZE(spdif_parent),
+                STM32F7_RCC_DCKCFGR2, 22, 3,
+                STM32F4_RCC_APB2ENR, 23,
+                CLK_SET_RATE_PARENT
+        },
+        {
+                CLK_USART1, "usart1",
+                uart_parents1, ARRAY_SIZE(uart_parents1),
+                STM32F7_RCC_DCKCFGR2, 0, 3,
+                STM32F4_RCC_APB2ENR, 4,
+                CLK_SET_RATE_PARENT,
+        },
+        {
+                CLK_USART2, "usart2",
+                uart_parents2, ARRAY_SIZE(uart_parents1),
+                STM32F7_RCC_DCKCFGR2, 2, 3,
+                STM32F4_RCC_APB1ENR, 17,
+                CLK_SET_RATE_PARENT,
+        },
+        {
+                CLK_USART3, "usart3",
+                uart_parents2, ARRAY_SIZE(uart_parents1),
+                STM32F7_RCC_DCKCFGR2, 4, 3,
+                STM32F4_RCC_APB1ENR, 18,
+                CLK_SET_RATE_PARENT,
+        },
+        {
+                CLK_UART4, "uart4",
+                uart_parents2, ARRAY_SIZE(uart_parents1),
+                STM32F7_RCC_DCKCFGR2, 6, 3,
+                STM32F4_RCC_APB1ENR, 19,
+                CLK_SET_RATE_PARENT,
+        },
+        {
+                CLK_UART5, "uart5",
+                uart_parents2, ARRAY_SIZE(uart_parents1),
+                STM32F7_RCC_DCKCFGR2, 8, 3,
+                STM32F4_RCC_APB1ENR, 20,
+                CLK_SET_RATE_PARENT,
+        },
+        {
+                CLK_USART6, "usart6",
+                uart_parents1, ARRAY_SIZE(uart_parents1),
+                STM32F7_RCC_DCKCFGR2, 10, 3,
+                STM32F4_RCC_APB2ENR, 5,
+                CLK_SET_RATE_PARENT,
+        },
+        {
+                CLK_UART7, "uart7",
+                uart_parents2, ARRAY_SIZE(uart_parents1),
+                STM32F7_RCC_DCKCFGR2, 12, 3,
+                STM32F4_RCC_APB1ENR, 30,
+                CLK_SET_RATE_PARENT,
+        },
+        {
+                CLK_UART8, "uart8",
+                uart_parents2, ARRAY_SIZE(uart_parents1),
+                STM32F7_RCC_DCKCFGR2, 14, 3,
+                STM32F4_RCC_APB1ENR, 31,
+                CLK_SET_RATE_PARENT,
+        },
+        {
+                CLK_I2C1, "i2c1",
+                i2c_parents, ARRAY_SIZE(i2c_parents),
+                STM32F7_RCC_DCKCFGR2, 16, 3,
+                STM32F4_RCC_APB1ENR, 21,
+                CLK_SET_RATE_PARENT,
+        },
+        {
+                CLK_I2C2, "i2c2",
+                i2c_parents, ARRAY_SIZE(i2c_parents),
+                STM32F7_RCC_DCKCFGR2, 18, 3,
+                STM32F4_RCC_APB1ENR, 22,
+                CLK_SET_RATE_PARENT,
+        },
+        {
+                CLK_I2C3, "i2c3",
+                i2c_parents, ARRAY_SIZE(i2c_parents),
+                STM32F7_RCC_DCKCFGR2, 20, 3,
+                STM32F4_RCC_APB1ENR, 23,
+                CLK_SET_RATE_PARENT,
+        },
+        {
+                CLK_I2C4, "i2c4",
+                i2c_parents, ARRAY_SIZE(i2c_parents),
+                STM32F7_RCC_DCKCFGR2, 22, 3,
+                STM32F4_RCC_APB1ENR, 24,
+                CLK_SET_RATE_PARENT,
+        },
+        {
+                CLK_LPTIMER, "lptim1",
+                lptim_parent, ARRAY_SIZE(lptim_parent),
+                STM32F7_RCC_DCKCFGR2, 24, 3,
+                STM32F4_RCC_APB1ENR, 9,
+                CLK_SET_RATE_PARENT
+        },
+        {
+                CLK_F769_DSI, "dsi",
+                dsi_parent, ARRAY_SIZE(dsi_parent),
+                STM32F7_RCC_DCKCFGR2, 0, 1,
+                STM32F4_RCC_APB2ENR, 27,
+                CLK_SET_RATE_PARENT
+        },
+        {
+                CLK_DFSDM1, "dfsdm1",
+                dfsdm1_src, ARRAY_SIZE(dfsdm1_src),
+                STM32F4_RCC_DCKCFGR, 25, 1,
+                STM32F4_RCC_APB2ENR, 29,
+                CLK_SET_RATE_PARENT
+        },
+        {
+                CLK_ADFSDM1, "adfsdm1",
+                adsfdm1_parent, ARRAY_SIZE(adsfdm1_parent),
+                STM32F4_RCC_DCKCFGR, 26, 1,
+                STM32F4_RCC_APB2ENR, 29,
+                CLK_SET_RATE_PARENT
+        },
+};
+
 static const struct stm32f4_clk_data stm32f429_clk_data = {
         .end_primary    = END_PRIMARY_CLK,
         .gates_data     = stm32f429_gates,
@@ -1343,6 +1604,16 @@ static const struct stm32f4_clk_data stm32f746_clk_data = {
         .aux_clk_num    = ARRAY_SIZE(stm32f746_aux_clk),
 };
 
+static const struct stm32f4_clk_data stm32f769_clk_data = {
+        .end_primary    = END_PRIMARY_CLK_F7,
+        .gates_data     = stm32f769_gates,
+        .gates_map      = stm32f769_gate_map,
+        .gates_num      = ARRAY_SIZE(stm32f769_gates),
+        .pll_data       = stm32f469_pll,
+        .aux_clk        = stm32f769_aux_clk,
+        .aux_clk_num    = ARRAY_SIZE(stm32f769_aux_clk),
+};
+
 static const struct of_device_id stm32f4_of_match[] = {
         {
                 .compatible = "st,stm32f42xx-rcc",
@@ -1356,6 +1627,10 @@ static const struct of_device_id stm32f4_of_match[] = {
                 .compatible = "st,stm32f746-rcc",
                 .data = &stm32f746_clk_data
         },
+        {
+                .compatible = "st,stm32f769-rcc",
+                .data = &stm32f769_clk_data
+        },
         {}
 };
 
@@ -1427,9 +1702,8 @@ static void __init stm32f4_rcc_init(struct device_node *np)
         int n;
         const struct of_device_id *match;
         const struct stm32f4_clk_data *data;
-        unsigned long pllcfgr;
-        const char *pllsrc;
         unsigned long pllm;
+        struct clk_hw *pll_src_hw;
 
         base = of_iomap(np, 0);
         if (!base) {
@@ -1460,21 +1734,33 @@ static void __init stm32f4_rcc_init(struct device_node *np)
 
         hse_clk = of_clk_get_parent_name(np, 0);
         dsi_parent[0] = hse_clk;
+        pllsrc_parent[1] = hse_clk;
 
         i2s_in_clk = of_clk_get_parent_name(np, 1);
 
         i2s_parents[1] = i2s_in_clk;
         sai_parents[2] = i2s_in_clk;
 
+        if (of_device_is_compatible(np, "st,stm32f769-rcc")) {
+                clk_hw_register_gate(NULL, "dfsdm1_apb", "apb2_div", 0,
+                                     base + STM32F4_RCC_APB2ENR, 29,
+                                     CLK_IGNORE_UNUSED, &stm32f4_clk_lock);
+                dsi_parent[0] = pll_src;
+                sai_parents[3] = pll_src;
+        }
+
         clks[CLK_HSI] = clk_hw_register_fixed_rate_with_accuracy(NULL, "hsi",
                         NULL, 0, 16000000, 160000);
 
-        pllcfgr = readl(base + STM32F4_RCC_PLLCFGR);
-        pllsrc = pllcfgr & BIT(22) ? hse_clk : "hsi";
-        pllm = pllcfgr & 0x3f;
+        pll_src_hw = clk_hw_register_mux(NULL, pll_src, pllsrc_parent,
+                                         ARRAY_SIZE(pllsrc_parent), 0,
+                                         base + STM32F4_RCC_PLLCFGR, 22, 1, 0,
+                                         &stm32f4_clk_lock);
+
+        pllm = readl(base + STM32F4_RCC_PLLCFGR) & 0x3f;
 
-        clk_hw_register_fixed_factor(NULL, "vco_in", pllsrc,
-                                               0, 1, pllm);
+        clk_hw_register_fixed_factor(NULL, "vco_in", pll_src,
+                                     0, 1, pllm);
 
         stm32f4_rcc_register_pll("vco_in", &data->pll_data[0],
                         &stm32f4_clk_lock);
@@ -1612,12 +1898,16 @@ static void __init stm32f4_rcc_init(struct device_node *np)
                         clks[aux_clk->idx] = hw;
         }
 
-        if (of_device_is_compatible(np, "st,stm32f746-rcc"))
+        if (of_device_is_compatible(np, "st,stm32f746-rcc")) {
 
                 clk_hw_register_fixed_factor(NULL, "hsi_div488", "hsi", 0,
                                 1, 488);
 
+                clks[CLK_PLL_SRC] = pll_src_hw;
+        }
+
         of_clk_add_hw_provider(np, stm32f4_rcc_lookup_clk, NULL);
+
         return;
 fail:
         kfree(clks);
@@ -1626,3 +1916,4 @@ fail:
 CLK_OF_DECLARE_DRIVER(stm32f42xx_rcc, "st,stm32f42xx-rcc", stm32f4_rcc_init);
 CLK_OF_DECLARE_DRIVER(stm32f46xx_rcc, "st,stm32f469-rcc", stm32f4_rcc_init);
 CLK_OF_DECLARE_DRIVER(stm32f746_rcc, "st,stm32f746-rcc", stm32f4_rcc_init);
+CLK_OF_DECLARE_DRIVER(stm32f769_rcc, "st,stm32f769-rcc", stm32f4_rcc_init);
diff --git a/include/dt-bindings/clock/stm32fx-clock.h b/include/dt-bindings/clock/stm32fx-clock.h
index 58d8b515be55..7d34e297049c 100644
--- a/include/dt-bindings/clock/stm32fx-clock.h
+++ b/include/dt-bindings/clock/stm32fx-clock.h
@@ -54,7 +54,10 @@
 #define CLK_I2C3                28
 #define CLK_I2C4                29
 #define CLK_LPTIMER             30
-
-#define END_PRIMARY_CLK_F7      31
+#define CLK_PLL_SRC             31
+#define CLK_DFSDM1              32
+#define CLK_ADFSDM1             33
+#define CLK_F769_DSI            34
+#define END_PRIMARY_CLK_F7      35
 
 #endif