From: Duje Mihanović <duje.mihanovic@xxxxxxxx> Add driver for the APMU controller block found on Marvell's PXA1908 SoC. This driver is incomplete, lacking support for (at least) GPU, VPU, DSI and CCIC (camera related) clocks. Signed-off-by: Duje Mihanović <duje.mihanovic@xxxxxxxx> --- drivers/clk/mmp/Makefile | 2 +- drivers/clk/mmp/clk-pxa1908-apmu.c | 121 +++++++++++++++++++++++++++++++++++++ 2 files changed, 122 insertions(+), 1 deletion(-) diff --git a/drivers/clk/mmp/Makefile b/drivers/clk/mmp/Makefile index 038bcd4d035e1807973f5094db5565fe437e0650..a8b1a4b08824bc0ee7e6541a670808f31bf40240 100644 --- a/drivers/clk/mmp/Makefile +++ b/drivers/clk/mmp/Makefile @@ -11,4 +11,4 @@ obj-$(CONFIG_MACH_MMP_DT) += clk-of-pxa168.o clk-of-pxa910.o obj-$(CONFIG_COMMON_CLK_MMP2) += clk-of-mmp2.o clk-pll.o pwr-island.o obj-$(CONFIG_COMMON_CLK_MMP2_AUDIO) += clk-audio.o -obj-$(CONFIG_ARCH_MMP) += clk-of-pxa1928.o clk-pxa1908-apbc.o clk-pxa1908-apbcp.o +obj-$(CONFIG_ARCH_MMP) += clk-of-pxa1928.o clk-pxa1908-apbc.o clk-pxa1908-apbcp.o clk-pxa1908-apmu.o diff --git a/drivers/clk/mmp/clk-pxa1908-apmu.c b/drivers/clk/mmp/clk-pxa1908-apmu.c new file mode 100644 index 0000000000000000000000000000000000000000..8cfb1258202f6f312a7c01128ad91d1b02b3cffc --- /dev/null +++ b/drivers/clk/mmp/clk-pxa1908-apmu.c @@ -0,0 +1,121 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include <linux/clk-provider.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> + +#include <dt-bindings/clock/marvell,pxa1908.h> + +#include "clk.h" + +#define APMU_CLK_GATE_CTRL 0x40 +#define APMU_CCIC1 0x24 +#define APMU_ISP 0x38 +#define APMU_DSI1 0x44 +#define APMU_DISP1 0x4c +#define APMU_CCIC0 0x50 +#define APMU_SDH0 0x54 +#define APMU_SDH1 0x58 +#define APMU_USB 0x5c +#define APMU_NF 0x60 +#define APMU_VPU 0xa4 +#define APMU_GC 0xcc +#define APMU_SDH2 0xe0 +#define APMU_GC2D 0xf4 +#define APMU_TRACE 0x108 +#define APMU_DVC_DFC_DEBUG 0x140 + +#define APMU_NR_CLKS 17 + +struct pxa1908_clk_unit { + struct mmp_clk_unit unit; + void __iomem *base; +}; + +static DEFINE_SPINLOCK(pll1_lock); +static struct mmp_param_general_gate_clk pll1_gate_clks[] = { + {PXA1908_CLK_PLL1_D2_GATE, "pll1_d2_gate", "pll1_d2", 0, APMU_CLK_GATE_CTRL, 29, 0, &pll1_lock}, + {PXA1908_CLK_PLL1_416_GATE, "pll1_416_gate", "pll1_416", 0, APMU_CLK_GATE_CTRL, 27, 0, &pll1_lock}, + {PXA1908_CLK_PLL1_624_GATE, "pll1_624_gate", "pll1_624", 0, APMU_CLK_GATE_CTRL, 26, 0, &pll1_lock}, + {PXA1908_CLK_PLL1_832_GATE, "pll1_832_gate", "pll1_832", 0, APMU_CLK_GATE_CTRL, 30, 0, &pll1_lock}, + {PXA1908_CLK_PLL1_1248_GATE, "pll1_1248_gate", "pll1_1248", 0, APMU_CLK_GATE_CTRL, 28, 0, &pll1_lock}, +}; + +static DEFINE_SPINLOCK(sdh0_lock); +static DEFINE_SPINLOCK(sdh1_lock); +static DEFINE_SPINLOCK(sdh2_lock); + +static const char * const sdh_parent_names[] = {"pll1_416", "pll1_624"}; + +static struct mmp_clk_mix_config sdh_mix_config = { + .reg_info = DEFINE_MIX_REG_INFO(3, 8, 2, 6, 11), +}; + +static struct mmp_param_gate_clk apmu_gate_clks[] = { + {PXA1908_CLK_USB, "usb_clk", NULL, 0, APMU_USB, 0x9, 0x9, 0x1, 0, NULL}, + {PXA1908_CLK_SDH0, "sdh0_clk", "sdh0_mix_clk", CLK_SET_RATE_PARENT | CLK_SET_RATE_UNGATE, APMU_SDH0, 0x12, 0x12, 0x0, 0, &sdh0_lock}, + {PXA1908_CLK_SDH1, "sdh1_clk", "sdh1_mix_clk", CLK_SET_RATE_PARENT | CLK_SET_RATE_UNGATE, APMU_SDH1, 0x12, 0x12, 0x0, 0, &sdh1_lock}, + {PXA1908_CLK_SDH2, "sdh2_clk", "sdh2_mix_clk", CLK_SET_RATE_PARENT | CLK_SET_RATE_UNGATE, APMU_SDH2, 0x12, 0x12, 0x0, 0, &sdh2_lock} +}; + +static void pxa1908_axi_periph_clk_init(struct pxa1908_clk_unit *pxa_unit) +{ + struct mmp_clk_unit *unit = &pxa_unit->unit; + + mmp_register_general_gate_clks(unit, pll1_gate_clks, + pxa_unit->base, ARRAY_SIZE(pll1_gate_clks)); + + sdh_mix_config.reg_info.reg_clk_ctrl = pxa_unit->base + APMU_SDH0; + mmp_clk_register_mix(NULL, "sdh0_mix_clk", sdh_parent_names, + ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, + &sdh_mix_config, &sdh0_lock); + sdh_mix_config.reg_info.reg_clk_ctrl = pxa_unit->base + APMU_SDH1; + mmp_clk_register_mix(NULL, "sdh1_mix_clk", sdh_parent_names, + ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, + &sdh_mix_config, &sdh1_lock); + sdh_mix_config.reg_info.reg_clk_ctrl = pxa_unit->base + APMU_SDH2; + mmp_clk_register_mix(NULL, "sdh2_mix_clk", sdh_parent_names, + ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, + &sdh_mix_config, &sdh2_lock); + + mmp_register_gate_clks(unit, apmu_gate_clks, pxa_unit->base, + ARRAY_SIZE(apmu_gate_clks)); +} + +static int pxa1908_apmu_probe(struct platform_device *pdev) +{ + struct pxa1908_clk_unit *pxa_unit; + + pxa_unit = devm_kzalloc(&pdev->dev, sizeof(*pxa_unit), GFP_KERNEL); + if (IS_ERR(pxa_unit)) + return PTR_ERR(pxa_unit); + + pxa_unit->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(pxa_unit->base)) + return PTR_ERR(pxa_unit->base); + + mmp_clk_init(pdev->dev.of_node, &pxa_unit->unit, APMU_NR_CLKS); + + pxa1908_axi_periph_clk_init(pxa_unit); + + return 0; +} + +static const struct of_device_id pxa1908_apmu_match_table[] = { + { .compatible = "marvell,pxa1908-apmu" }, + { } +}; +MODULE_DEVICE_TABLE(of, pxa1908_apmu_match_table); + +static struct platform_driver pxa1908_apmu_driver = { + .probe = pxa1908_apmu_probe, + .driver = { + .name = "pxa1908-apmu", + .of_match_table = pxa1908_apmu_match_table + } +}; +module_platform_driver(pxa1908_apmu_driver); + +MODULE_AUTHOR("Duje Mihanović <duje.mihanovic@xxxxxxxx>"); +MODULE_DESCRIPTION("Marvell PXA1908 APMU Clock Driver"); +MODULE_LICENSE("GPL"); -- 2.46.2