From: Duje Mihanović Date: Wed, 24 Apr 2024 16:20:50 +0000 (+0200) Subject: clk: mmp: Add Marvell PXA1908 MPMU driver X-Git-Url: https://git.dujemihanovic.xyz/?a=commitdiff_plain;h=e75ab6b37f03c867108906e41ab127d404ff37e2;p=linux.git clk: mmp: Add Marvell PXA1908 MPMU driver Add driver for the MPMU controller block on Marvell's PXA1908 SoC. The driver is incomplete, currently only supporting the fixed PLL1; dynamic PLLs 2-4 and CPU/DDR/AXI clock support is missing. Signed-off-by: Duje Mihanović --- diff --git a/drivers/clk/mmp/Makefile b/drivers/clk/mmp/Makefile index a8b1a4b08824..062cd87fa8dd 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 clk-pxa1908-apmu.o +obj-$(CONFIG_ARCH_MMP) += clk-of-pxa1928.o clk-pxa1908-apbc.o clk-pxa1908-apbcp.o clk-pxa1908-apmu.o clk-pxa1908-mpmu.o diff --git a/drivers/clk/mmp/clk-pxa1908-mpmu.c b/drivers/clk/mmp/clk-pxa1908-mpmu.c new file mode 100644 index 000000000000..e3337bacaadd --- /dev/null +++ b/drivers/clk/mmp/clk-pxa1908-mpmu.c @@ -0,0 +1,112 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include +#include +#include +#include +#include + +#include + +#include "clk.h" + +#define MPMU_UART_PLL 0x14 + +#define MPMU_NR_CLKS 39 + +struct pxa1908_clk_unit { + struct mmp_clk_unit unit; + void __iomem *base; +}; + +static struct mmp_param_fixed_rate_clk fixed_rate_clks[] = { + {PXA1908_CLK_CLK32, "clk32", NULL, 0, 32768}, + {PXA1908_CLK_VCTCXO, "vctcxo", NULL, 0, 26 * HZ_PER_MHZ}, + {PXA1908_CLK_PLL1_624, "pll1_624", NULL, 0, 624 * HZ_PER_MHZ}, + {PXA1908_CLK_PLL1_416, "pll1_416", NULL, 0, 416 * HZ_PER_MHZ}, + {PXA1908_CLK_PLL1_499, "pll1_499", NULL, 0, 499 * HZ_PER_MHZ}, + {PXA1908_CLK_PLL1_832, "pll1_832", NULL, 0, 832 * HZ_PER_MHZ}, + {PXA1908_CLK_PLL1_1248, "pll1_1248", NULL, 0, 1248 * HZ_PER_MHZ}, +}; + +static struct mmp_param_fixed_factor_clk fixed_factor_clks[] = { + {PXA1908_CLK_PLL1_D2, "pll1_d2", "pll1_624", 1, 2, 0}, + {PXA1908_CLK_PLL1_D4, "pll1_d4", "pll1_d2", 1, 2, 0}, + {PXA1908_CLK_PLL1_D6, "pll1_d6", "pll1_d2", 1, 3, 0}, + {PXA1908_CLK_PLL1_D8, "pll1_d8", "pll1_d4", 1, 2, 0}, + {PXA1908_CLK_PLL1_D12, "pll1_d12", "pll1_d6", 1, 2, 0}, + {PXA1908_CLK_PLL1_D13, "pll1_d13", "pll1_624", 1, 13, 0}, + {PXA1908_CLK_PLL1_D16, "pll1_d16", "pll1_d8", 1, 2, 0}, + {PXA1908_CLK_PLL1_D24, "pll1_d24", "pll1_d12", 1, 2, 0}, + {PXA1908_CLK_PLL1_D48, "pll1_d48", "pll1_d24", 1, 2, 0}, + {PXA1908_CLK_PLL1_D96, "pll1_d96", "pll1_d48", 1, 2, 0}, + {PXA1908_CLK_PLL1_32, "pll1_32", "pll1_d13", 2, 3, 0}, + {PXA1908_CLK_PLL1_208, "pll1_208", "pll1_d2", 2, 3, 0}, + {PXA1908_CLK_PLL1_117, "pll1_117", "pll1_624", 3, 16, 0}, +}; + +static struct u32_fract uart_factor_tbl[] = { + {.numerator = 8125, .denominator = 1536}, /* 14.745MHz */ +}; + +static struct mmp_clk_factor_masks uart_factor_masks = { + .factor = 2, + .num_mask = GENMASK(12, 0), + .den_mask = GENMASK(12, 0), + .num_shift = 16, + .den_shift = 0, +}; + +static void pxa1908_pll_init(struct pxa1908_clk_unit *pxa_unit) +{ + struct mmp_clk_unit *unit = &pxa_unit->unit; + + mmp_register_fixed_rate_clks(unit, fixed_rate_clks, + ARRAY_SIZE(fixed_rate_clks)); + + mmp_register_fixed_factor_clks(unit, fixed_factor_clks, + ARRAY_SIZE(fixed_factor_clks)); + + mmp_clk_register_factor("uart_pll", "pll1_d4", + CLK_SET_RATE_PARENT, + pxa_unit->base + MPMU_UART_PLL, + &uart_factor_masks, uart_factor_tbl, + ARRAY_SIZE(uart_factor_tbl), NULL); +} + +static int pxa1908_mpmu_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, MPMU_NR_CLKS); + + pxa1908_pll_init(pxa_unit); + + return 0; +} + +static const struct of_device_id pxa1908_mpmu_match_table[] = { + { .compatible = "marvell,pxa1908-mpmu" }, + { } +}; +MODULE_DEVICE_TABLE(of, pxa1908_mpmu_match_table); + +static struct platform_driver pxa1908_mpmu_driver = { + .probe = pxa1908_mpmu_probe, + .driver = { + .name = "pxa1908-mpmu", + .of_match_table = pxa1908_mpmu_match_table + } +}; +module_platform_driver(pxa1908_mpmu_driver); + +MODULE_AUTHOR("Duje Mihanović "); +MODULE_DESCRIPTION("Marvell PXA1908 MPMU Clock Driver"); +MODULE_LICENSE("GPL");