We don't actually need any clocks to get UFS up and running, resets are useful though.
Signed-off-by: Caleb Connolly caleb.connolly@linaro.org --- drivers/clk/qcom/Kconfig | 8 +++ drivers/clk/qcom/Makefile | 1 + drivers/clk/qcom/clock-qcom.h | 1 + drivers/clk/qcom/clock-sc7280.c | 132 ++++++++++++++++++++++++++++++++++++++++ 4 files changed, 142 insertions(+)
diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig index 45d63c6d6dbf..0d2c0ac225c5 100644 --- a/drivers/clk/qcom/Kconfig +++ b/drivers/clk/qcom/Kconfig @@ -85,7 +85,15 @@ config CLK_QCOM_SM8650 Say Y here to enable support for the Global Clock Controller on the Snapdragon SM8650 SoC. This driver supports the clocks and resets exposed by the GCC hardware block.
+config CLK_QCOM_SC7280 + bool "Qualcomm SC7280 GCC" + select CLK_QCOM + help + Say Y here to enable support for the Global Clock Controller + on the Snapdragon SC7280 SoC. This driver supports the clocks + and resets exposed by the GCC hardware block. + endmenu
endif diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile index dec20e4b5943..e223c131ee4d 100644 --- a/drivers/clk/qcom/Makefile +++ b/drivers/clk/qcom/Makefile @@ -8,8 +8,9 @@ obj-$(CONFIG_CLK_QCOM_APQ8016) += clock-apq8016.o obj-$(CONFIG_CLK_QCOM_APQ8096) += clock-apq8096.o obj-$(CONFIG_CLK_QCOM_IPQ4019) += clock-ipq4019.o obj-$(CONFIG_CLK_QCOM_QCM2290) += clock-qcm2290.o obj-$(CONFIG_CLK_QCOM_QCS404) += clock-qcs404.o +obj-$(CONFIG_CLK_QCOM_SC7280) += clock-sc7280.o obj-$(CONFIG_CLK_QCOM_SM6115) += clock-sm6115.o obj-$(CONFIG_CLK_QCOM_SM8250) += clock-sm8250.o obj-$(CONFIG_CLK_QCOM_SM8550) += clock-sm8550.o obj-$(CONFIG_CLK_QCOM_SM8650) += clock-sm8650.o diff --git a/drivers/clk/qcom/clock-qcom.h b/drivers/clk/qcom/clock-qcom.h index f6445c8f566f..7aa6ca59aad5 100644 --- a/drivers/clk/qcom/clock-qcom.h +++ b/drivers/clk/qcom/clock-qcom.h @@ -10,8 +10,9 @@ #define CFG_CLK_SRC_CXO (0 << 8) #define CFG_CLK_SRC_GPLL0 (1 << 8) #define CFG_CLK_SRC_GPLL0_AUX2 (2 << 8) #define CFG_CLK_SRC_GPLL9 (2 << 8) +#define CFG_CLK_SRC_GPLL0_ODD (3 << 8) #define CFG_CLK_SRC_GPLL6 (4 << 8) #define CFG_CLK_SRC_GPLL7 (3 << 8) #define CFG_CLK_SRC_GPLL4 (5 << 8) #define CFG_CLK_SRC_GPLL0_EVEN (6 << 8) diff --git a/drivers/clk/qcom/clock-sc7280.c b/drivers/clk/qcom/clock-sc7280.c new file mode 100644 index 000000000000..5d343f120519 --- /dev/null +++ b/drivers/clk/qcom/clock-sc7280.c @@ -0,0 +1,132 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Clock drivers for Qualcomm sc7280 + * + * (C) Copyright 2024 Linaro Ltd. + */ + +#include <linux/types.h> +#include <clk-uclass.h> +#include <dm.h> +#include <linux/delay.h> +#include <asm/io.h> +#include <linux/bug.h> +#include <linux/bitops.h> +#include <dt-bindings/clock/qcom,gcc-sc7280.h> + +#include "clock-qcom.h" + +#define USB30_PRIM_MOCK_UTMI_CLK_CMD_RCGR 0xf038 +#define USB30_PRIM_MASTER_CLK_CMD_RCGR 0xf020 + +static ulong sc7280_set_rate(struct clk *clk, ulong rate) +{ + struct msm_clk_priv *priv = dev_get_priv(clk->dev); + + if (clk->id < priv->data->num_clks) + debug("%s: %s, requested rate=%ld\n", __func__, priv->data->clks[clk->id].name, rate); + + switch (clk->id) { + case GCC_USB30_PRIM_MOCK_UTMI_CLK: + WARN(rate != 19200000, "Unexpected rate for USB30_PRIM_MOCK_UTMI_CLK: %lu\n", rate); + clk_rcg_set_rate(priv->base, USB30_PRIM_MASTER_CLK_CMD_RCGR, 0, CFG_CLK_SRC_CXO); + return rate; + case GCC_USB30_PRIM_MASTER_CLK: + WARN(rate != 200000000, "Unexpected rate for USB30_PRIM_MASTER_CLK: %lu\n", rate); + clk_rcg_set_rate_mnd(priv->base, USB30_PRIM_MASTER_CLK_CMD_RCGR, + 1, 0, 0, CFG_CLK_SRC_GPLL0_ODD, 8); + clk_rcg_set_rate(priv->base, 0xf064, 0, 0); + return rate; + default: + return 0; + } +} + +static const struct gate_clk sc7280_clks[] = { + GATE_CLK(GCC_CFG_NOC_USB3_PRIM_AXI_CLK, 0xf07c, 1), + GATE_CLK(GCC_USB30_PRIM_MASTER_CLK, 0xf010, 1), + GATE_CLK(GCC_AGGRE_USB3_PRIM_AXI_CLK, 0xf080, 1), + GATE_CLK(GCC_USB30_PRIM_SLEEP_CLK, 0xf018, 1), + GATE_CLK(GCC_USB30_PRIM_MOCK_UTMI_CLK, 0xf01c, 1), + GATE_CLK(GCC_USB3_PRIM_PHY_AUX_CLK, 0xf054, 1), + GATE_CLK(GCC_USB3_PRIM_PHY_COM_AUX_CLK, 0xf058, 1), +}; + +static int sc7280_enable(struct clk *clk) +{ + struct msm_clk_priv *priv = dev_get_priv(clk->dev); + + if (priv->data->num_clks < clk->id) { + debug("%s: unknown clk id %lu\n", __func__, clk->id); + return 0; + } + + debug("%s: clk %ld: %s\n", __func__, clk->id, sc7280_clks[clk->id].name); + + switch (clk->id) { + case GCC_AGGRE_USB3_PRIM_AXI_CLK: + qcom_gate_clk_en(priv, GCC_USB30_PRIM_MASTER_CLK); + fallthrough; + case GCC_USB30_PRIM_MASTER_CLK: + qcom_gate_clk_en(priv, GCC_USB3_PRIM_PHY_AUX_CLK); + qcom_gate_clk_en(priv, GCC_USB3_PRIM_PHY_COM_AUX_CLK); + break; + } + + qcom_gate_clk_en(priv, clk->id); + + return 0; +} + +static const struct qcom_reset_map sc7280_gcc_resets[] = { + [GCC_PCIE_0_BCR] = { 0x6b000 }, + [GCC_PCIE_0_PHY_BCR] = { 0x6c01c }, + [GCC_PCIE_1_BCR] = { 0x8d000 }, + [GCC_PCIE_1_PHY_BCR] = { 0x8e01c }, + [GCC_QUSB2PHY_PRIM_BCR] = { 0x12000 }, + [GCC_QUSB2PHY_SEC_BCR] = { 0x12004 }, + [GCC_SDCC1_BCR] = { 0x75000 }, + [GCC_SDCC2_BCR] = { 0x14000 }, + [GCC_SDCC4_BCR] = { 0x16000 }, + [GCC_UFS_PHY_BCR] = { 0x77000 }, + [GCC_USB30_PRIM_BCR] = { 0xf000 }, + [GCC_USB30_SEC_BCR] = { 0x9e000 }, + [GCC_USB3_DP_PHY_PRIM_BCR] = { 0x50008 }, + [GCC_USB3_PHY_PRIM_BCR] = { 0x50000 }, + [GCC_USB3PHY_PHY_PRIM_BCR] = { 0x50004 }, + [GCC_USB_PHY_CFG_AHB2PHY_BCR] = { 0x6a000 }, +}; + +static const struct qcom_power_map sc7280_gdscs[] = { + [GCC_UFS_PHY_GDSC] = { 0x77004 }, + [GCC_USB30_PRIM_GDSC] = { 0xf004 }, +}; + +static struct msm_clk_data qcs404_gcc_data = { + .resets = sc7280_gcc_resets, + .num_resets = ARRAY_SIZE(sc7280_gcc_resets), + .clks = sc7280_clks, + .num_clks = ARRAY_SIZE(sc7280_clks), + + .power_domains = sc7280_gdscs, + .num_power_domains = ARRAY_SIZE(sc7280_gdscs), + + .enable = sc7280_enable, + .set_rate = sc7280_set_rate, +}; + +static const struct udevice_id gcc_sc7280_of_match[] = { + { + .compatible = "qcom,gcc-sc7280", + .data = (ulong)&qcs404_gcc_data, + }, + { } +}; + +U_BOOT_DRIVER(gcc_sc7280) = { + .name = "gcc_sc7280", + .id = UCLASS_NOP, + .of_match = gcc_sc7280_of_match, + .bind = qcom_cc_bind, + .flags = DM_FLAG_PRE_RELOC | DM_FLAG_DEFAULT_PD_CTRL_OFF, +};