From patchwork Wed Jul 6 16:53:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomer Maimon X-Patchwork-Id: 589191 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0650BCCA486 for ; Wed, 6 Jul 2022 16:54:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234432AbiGFQy1 (ORCPT ); Wed, 6 Jul 2022 12:54:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48372 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234167AbiGFQyY (ORCPT ); Wed, 6 Jul 2022 12:54:24 -0400 Received: from maillog.nuvoton.com (maillog.nuvoton.com [202.39.227.15]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 24C8227B38; Wed, 6 Jul 2022 09:54:21 -0700 (PDT) Received: from NTHCCAS04.nuvoton.com (NTHCCAS04.nuvoton.com [10.1.8.29]) by maillog.nuvoton.com (Postfix) with ESMTP id C8EF41C81183; Thu, 7 Jul 2022 00:54:18 +0800 (CST) Received: from NTHCML01A.nuvoton.com (10.1.8.177) by NTHCCAS04.nuvoton.com (10.1.8.29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Thu, 7 Jul 2022 00:54:18 +0800 Received: from NTHCCAS01.nuvoton.com (10.1.8.28) by NTHCML01A.nuvoton.com (10.1.8.177) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Thu, 7 Jul 2022 00:54:18 +0800 Received: from taln60.nuvoton.co.il (10.191.1.180) by NTHCCAS01.nuvoton.com (10.1.12.25) with Microsoft SMTP Server id 15.1.2375.7 via Frontend Transport; Thu, 7 Jul 2022 00:54:17 +0800 Received: by taln60.nuvoton.co.il (Postfix, from userid 10070) id 4223163A4C; Wed, 6 Jul 2022 19:54:17 +0300 (IDT) From: Tomer Maimon To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , CC: , , , , , , Tomer Maimon Subject: [PATCH v7 04/16] clk: npcm8xx: add clock controller Date: Wed, 6 Jul 2022 19:53:54 +0300 Message-ID: <20220706165406.117349-5-tmaimon77@gmail.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20220706165406.117349-1-tmaimon77@gmail.com> References: <20220706165406.117349-1-tmaimon77@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Nuvoton Arbel BMC NPCM8XX contains an integrated clock controller which generates and supplies clocks to all modules within the BMC. Signed-off-by: Tomer Maimon --- drivers/clk/Kconfig | 6 + drivers/clk/Makefile | 1 + drivers/clk/clk-npcm8xx.c | 600 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 607 insertions(+) create mode 100644 drivers/clk/clk-npcm8xx.c diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index 48f8f4221e21..9aa915f6e233 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -428,6 +428,12 @@ config COMMON_CLK_K210 help Support for the Canaan Kendryte K210 RISC-V SoC clocks. +config COMMON_CLK_NPCM8XX + tristate "Clock driver for the NPCM8XX SoC Family" + depends on ARCH_NPCM || COMPILE_TEST + help + This driver supports the clocks on the Nuvoton BMC NPCM8XX SoC Family. + source "drivers/clk/actions/Kconfig" source "drivers/clk/analogbits/Kconfig" source "drivers/clk/baikal-t1/Kconfig" diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index d5db170d38d2..b0ec1184a744 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -49,6 +49,7 @@ obj-$(CONFIG_ARCH_MILBEAUT_M10V) += clk-milbeaut.o obj-$(CONFIG_ARCH_MOXART) += clk-moxart.o obj-$(CONFIG_ARCH_NOMADIK) += clk-nomadik.o obj-$(CONFIG_ARCH_NPCM7XX) += clk-npcm7xx.o +obj-$(CONFIG_COMMON_CLK_NPCM8XX) += clk-npcm8xx.o obj-$(CONFIG_ARCH_NSPIRE) += clk-nspire.o obj-$(CONFIG_COMMON_CLK_OXNAS) += clk-oxnas.o obj-$(CONFIG_COMMON_CLK_PALMAS) += clk-palmas.o diff --git a/drivers/clk/clk-npcm8xx.c b/drivers/clk/clk-npcm8xx.c new file mode 100644 index 000000000000..6189143cb801 --- /dev/null +++ b/drivers/clk/clk-npcm8xx.c @@ -0,0 +1,600 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Nuvoton NPCM8xx Clock Generator + * All the clocks are initialized by the bootloader, so this driver allow only + * reading of current settings directly from the hardware. + * + * Copyright (C) 2020 Nuvoton Technologies + * Author: Tomer Maimon + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define NPCM8XX_REF_CLK 25000000 + +struct npcm8xx_clk_pll { + struct clk_hw hw; + void __iomem *pllcon; + u8 flags; +}; + +#define to_npcm8xx_clk_pll(_hw) container_of(_hw, struct npcm8xx_clk_pll, hw) + +#define PLLCON_LOKI BIT(31) +#define PLLCON_LOKS BIT(30) +#define PLLCON_FBDV GENMASK(27, 16) +#define PLLCON_OTDV2 GENMASK(15, 13) +#define PLLCON_PWDEN BIT(12) +#define PLLCON_OTDV1 GENMASK(10, 8) +#define PLLCON_INDV GENMASK(5, 0) + +static unsigned long npcm8xx_clk_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct npcm8xx_clk_pll *pll = to_npcm8xx_clk_pll(hw); + unsigned long fbdv, indv, otdv1, otdv2; + unsigned int val; + u64 ret; + + if (parent_rate == 0) { + pr_debug("%s: parent rate is zero\n", __func__); + return 0; + } + + val = readl_relaxed(pll->pllcon); + + indv = FIELD_GET(PLLCON_INDV, val); + fbdv = FIELD_GET(PLLCON_FBDV, val); + otdv1 = FIELD_GET(PLLCON_OTDV1, val); + otdv2 = FIELD_GET(PLLCON_OTDV2, val); + + ret = (u64)parent_rate * fbdv; + do_div(ret, indv * otdv1 * otdv2); + + return ret; +} + +static const struct clk_ops npcm8xx_clk_pll_ops = { + .recalc_rate = npcm8xx_clk_pll_recalc_rate, +}; + +static struct clk_hw * +npcm8xx_clk_register_pll(struct device *dev, void __iomem *pllcon, + const char *name, const char *parent_name, + unsigned long flags) +{ + struct npcm8xx_clk_pll *pll; + struct clk_init_data init; + struct clk_hw *hw; + int ret; + + pll = devm_kzalloc(dev, sizeof(*pll), GFP_KERNEL); + if (!pll) + return ERR_PTR(-ENOMEM); + + pr_debug("%s reg, name=%s, p=%s\n", __func__, name, parent_name); + + init.name = name; + init.ops = &npcm8xx_clk_pll_ops; + init.parent_names = &parent_name; + init.num_parents = 1; + init.flags = flags; + + pll->pllcon = pllcon; + pll->hw.init = &init; + + hw = &pll->hw; + + ret = devm_clk_hw_register(dev, hw); + if (ret) + return ERR_PTR(ret); + + return hw; +} + +#define NPCM8XX_CLKEN1 (0x00) +#define NPCM8XX_CLKEN2 (0x28) +#define NPCM8XX_CLKEN3 (0x30) +#define NPCM8XX_CLKEN4 (0x70) +#define NPCM8XX_CLKSEL (0x04) +#define NPCM8XX_CLKDIV1 (0x08) +#define NPCM8XX_CLKDIV2 (0x2C) +#define NPCM8XX_CLKDIV3 (0x58) +#define NPCM8XX_CLKDIV4 (0x7C) +#define NPCM8XX_PLLCON0 (0x0C) +#define NPCM8XX_PLLCON1 (0x10) +#define NPCM8XX_PLLCON2 (0x54) +#define NPCM8XX_SWRSTR (0x14) +#define NPCM8XX_IRQWAKECON (0x18) +#define NPCM8XX_IRQWAKEFLAG (0x1C) +#define NPCM8XX_IPSRST1 (0x20) +#define NPCM8XX_IPSRST2 (0x24) +#define NPCM8XX_IPSRST3 (0x34) +#define NPCM8XX_WD0RCR (0x38) +#define NPCM8XX_WD1RCR (0x3C) +#define NPCM8XX_WD2RCR (0x40) +#define NPCM8XX_SWRSTC1 (0x44) +#define NPCM8XX_SWRSTC2 (0x48) +#define NPCM8XX_SWRSTC3 (0x4C) +#define NPCM8XX_SWRSTC4 (0x50) +#define NPCM8XX_CORSTC (0x5C) +#define NPCM8XX_PLLCONG (0x60) +#define NPCM8XX_AHBCKFI (0x64) +#define NPCM8XX_SECCNT (0x68) +#define NPCM8XX_CNTR25M (0x6C) +#define NPCM8XX_THRTL_CNT (0xC0) + +struct npcm8xx_clk_mux_data { + u8 shift; + u8 mask; + u32 *table; + const char *name; + const char * const *parent_names; + u8 num_parents; + unsigned long flags; + /* + * If this clock is exported via DT, set onecell_idx to constant + * defined in include/dt-bindings/clock/nuvoton, NPCM8XX-clock.h for + * this specific clock. Otherwise, set to -1. + */ + int onecell_idx; +}; + +struct npcm8xx_clk_div_data { + u32 reg; + u8 shift; + u8 width; + const char *name; + const char *parent_name; + u8 clk_divider_flags; + unsigned long flags; + /* + * If this clock is exported via DT, set onecell_idx to constant + * defined in include/dt-bindings/clock/nuvoton, NPCM8XX-clock.h for + * this specific clock. Otherwise, set to -1. + */ + int onecell_idx; +}; + +struct npcm8xx_clk_pll_data { + u32 reg; + const char *name; + const char *parent_name; + unsigned long flags; + /* + * If this clock is exported via DT, set onecell_idx to constant + * defined in include/dt-bindings/clock/nuvoton, NPCM8XX-clock.h for + * this specific clock. Otherwise, set to -1. + */ + int onecell_idx; +}; + +/* + * Single copy of strings used to refer to clocks within this driver indexed by + * above enum. + */ +#define NPCM8XX_CLK_S_REFCLK "refclk" +#define NPCM8XX_CLK_S_SYSBYPCK "sysbypck" +#define NPCM8XX_CLK_S_MCBYPCK "mcbypck" +#define NPCM8XX_CLK_S_PLL0 "pll0" +#define NPCM8XX_CLK_S_PLL1 "pll1" +#define NPCM8XX_CLK_S_PLL1_DIV2 "pll1_div2" +#define NPCM8XX_CLK_S_PLL2 "pll2" +#define NPCM8XX_CLK_S_PLL_GFX "pll_gfx" +#define NPCM8XX_CLK_S_PLL2_DIV2 "pll2_div2" +#define NPCM8XX_CLK_S_PIX_MUX "gfx_pixel" +#define NPCM8XX_CLK_S_MC_MUX "mc_phy" +#define NPCM8XX_CLK_S_CPU_MUX "cpu" /* AKA system clock */ +#define NPCM8XX_CLK_S_MC "mc" +#define NPCM8XX_CLK_S_AXI "axi" /* AKA CLK2 */ +#define NPCM8XX_CLK_S_AHB "ahb" /* AKA CLK4 */ +#define NPCM8XX_CLK_S_CLKOUT_MUX "clkout_mux" +#define NPCM8XX_CLK_S_UART_MUX "uart_mux" +#define NPCM8XX_CLK_S_SD_MUX "sd_mux" +#define NPCM8XX_CLK_S_GFXM_MUX "gfxm_mux" +#define NPCM8XX_CLK_S_SU_MUX "serial_usb_mux" +#define NPCM8XX_CLK_S_DVC_MUX "dvc_mux" +#define NPCM8XX_CLK_S_GFX_MUX "gfx_mux" +#define NPCM8XX_CLK_S_ADC_MUX "adc_mux" +#define NPCM8XX_CLK_S_SPI0 "spi0" +#define NPCM8XX_CLK_S_SPI1 "spi1" +#define NPCM8XX_CLK_S_SPI3 "spi3" +#define NPCM8XX_CLK_S_SPIX "spix" +#define NPCM8XX_CLK_S_APB1 "apb1" +#define NPCM8XX_CLK_S_APB2 "apb2" +#define NPCM8XX_CLK_S_APB3 "apb3" +#define NPCM8XX_CLK_S_APB4 "apb4" +#define NPCM8XX_CLK_S_APB5 "apb5" +#define NPCM8XX_CLK_S_APB19 "apb19" +#define NPCM8XX_CLK_S_TOCK "tock" +#define NPCM8XX_CLK_S_CLKOUT "clkout" +#define NPCM8XX_CLK_S_PRE_ADC "pre adc" +#define NPCM8XX_CLK_S_UART "uart" +#define NPCM8XX_CLK_S_UART2 "uart2" +#define NPCM8XX_CLK_S_TIMER "timer" +#define NPCM8XX_CLK_S_MMC "mmc" +#define NPCM8XX_CLK_S_SDHC "sdhc" +#define NPCM8XX_CLK_S_ADC "adc" +#define NPCM8XX_CLK_S_GFX "gfx0_gfx1_mem" +#define NPCM8XX_CLK_S_USBIF "serial_usbif" +#define NPCM8XX_CLK_S_USB_HOST "usb_host" +#define NPCM8XX_CLK_S_USB_BRIDGE "usb_bridge" +#define NPCM8XX_CLK_S_PCI "pci" +#define NPCM8XX_CLK_S_TH "th" +#define NPCM8XX_CLK_S_ATB "atb" +#define NPCM8XX_CLK_S_PRE_CLK "pre_clk" + +#define NPCM8XX_CLK_S_RG_MUX "rg_mux" +#define NPCM8XX_CLK_S_RCP_MUX "rcp_mux" +#define NPCM8XX_CLK_S_RG "rg" +#define NPCM8XX_CLK_S_RCP "rcp" + +static u32 pll_mux_table[] = {0, 1, 2, 3}; +static const char * const pll_mux_parents[] = { + NPCM8XX_CLK_S_PLL0, + NPCM8XX_CLK_S_PLL1, + NPCM8XX_CLK_S_REFCLK, + NPCM8XX_CLK_S_PLL2_DIV2, +}; + +static u32 cpuck_mux_table[] = {0, 1, 2, 3, 7}; +static const char * const cpuck_mux_parents[] = { + NPCM8XX_CLK_S_PLL0, + NPCM8XX_CLK_S_PLL1, + NPCM8XX_CLK_S_REFCLK, + NPCM8XX_CLK_S_SYSBYPCK, + NPCM8XX_CLK_S_PLL2, +}; + +static u32 pixcksel_mux_table[] = {0, 2}; +static const char * const pixcksel_mux_parents[] = { + NPCM8XX_CLK_S_PLL_GFX, + NPCM8XX_CLK_S_REFCLK, +}; + +static u32 sucksel_mux_table[] = {2, 3}; +static const char * const sucksel_mux_parents[] = { + NPCM8XX_CLK_S_REFCLK, + NPCM8XX_CLK_S_PLL2_DIV2, +}; + +static u32 mccksel_mux_table[] = {0, 2, 3}; +static const char * const mccksel_mux_parents[] = { + NPCM8XX_CLK_S_PLL1_DIV2, + NPCM8XX_CLK_S_REFCLK, + NPCM8XX_CLK_S_MCBYPCK, +}; + +static u32 clkoutsel_mux_table[] = {0, 1, 2, 3, 4}; +static const char * const clkoutsel_mux_parents[] = { + NPCM8XX_CLK_S_PLL0, + NPCM8XX_CLK_S_PLL1, + NPCM8XX_CLK_S_REFCLK, + NPCM8XX_CLK_S_PLL_GFX, // divided by 2 + NPCM8XX_CLK_S_PLL2_DIV2, +}; + +static u32 gfxmsel_mux_table[] = {2, 3}; +static const char * const gfxmsel_mux_parents[] = { + NPCM8XX_CLK_S_REFCLK, + NPCM8XX_CLK_S_PLL2_DIV2, +}; + +static u32 dvcssel_mux_table[] = {2, 3}; +static const char * const dvcssel_mux_parents[] = { + NPCM8XX_CLK_S_REFCLK, + NPCM8XX_CLK_S_PLL2, +}; + +static const struct npcm8xx_clk_pll_data npcm8xx_plls[] = { + {NPCM8XX_PLLCON0, NPCM8XX_CLK_S_PLL0, NPCM8XX_CLK_S_REFCLK, 0, -1}, + {NPCM8XX_PLLCON1, NPCM8XX_CLK_S_PLL1, NPCM8XX_CLK_S_REFCLK, 0, -1}, + {NPCM8XX_PLLCON2, NPCM8XX_CLK_S_PLL2, NPCM8XX_CLK_S_REFCLK, 0, -1}, + {NPCM8XX_PLLCONG, NPCM8XX_CLK_S_PLL_GFX, NPCM8XX_CLK_S_REFCLK, 0, -1}, +}; + +static const struct npcm8xx_clk_mux_data npcm8xx_muxes[] = { + {0, GENMASK(1, 0), cpuck_mux_table, NPCM8XX_CLK_S_CPU_MUX, + cpuck_mux_parents, ARRAY_SIZE(cpuck_mux_parents), CLK_IS_CRITICAL, + NPCM8XX_CLK_CPU}, + + {4, GENMASK(1, 0), pixcksel_mux_table, NPCM8XX_CLK_S_PIX_MUX, + pixcksel_mux_parents, ARRAY_SIZE(pixcksel_mux_parents), 0, + NPCM8XX_CLK_GFX_PIXEL}, + + {6, GENMASK(1, 0), pll_mux_table, NPCM8XX_CLK_S_SD_MUX, + pll_mux_parents, ARRAY_SIZE(pll_mux_parents), 0, -1}, + + {8, GENMASK(1, 0), pll_mux_table, NPCM8XX_CLK_S_UART_MUX, + pll_mux_parents, ARRAY_SIZE(pll_mux_parents), 0, -1}, + + {10, GENMASK(1, 0), sucksel_mux_table, NPCM8XX_CLK_S_SU_MUX, + sucksel_mux_parents, ARRAY_SIZE(sucksel_mux_parents), 0, -1}, + + {12, GENMASK(1, 0), mccksel_mux_table, NPCM8XX_CLK_S_MC_MUX, + mccksel_mux_parents, ARRAY_SIZE(mccksel_mux_parents), 0, -1}, + + {14, GENMASK(1, 0), pll_mux_table, NPCM8XX_CLK_S_ADC_MUX, + pll_mux_parents, ARRAY_SIZE(pll_mux_parents), 0, -1}, + + {16, GENMASK(1, 0), pll_mux_table, NPCM8XX_CLK_S_GFX_MUX, + pll_mux_parents, ARRAY_SIZE(pll_mux_parents), 0, -1}, + + {18, GENMASK(2, 0), clkoutsel_mux_table, NPCM8XX_CLK_S_CLKOUT_MUX, + clkoutsel_mux_parents, ARRAY_SIZE(clkoutsel_mux_parents), 0, -1}, + + {21, GENMASK(1, 0), gfxmsel_mux_table, NPCM8XX_CLK_S_GFXM_MUX, + gfxmsel_mux_parents, ARRAY_SIZE(gfxmsel_mux_parents), 0, -1}, + + {23, GENMASK(1, 0), dvcssel_mux_table, NPCM8XX_CLK_S_DVC_MUX, + dvcssel_mux_parents, ARRAY_SIZE(dvcssel_mux_parents), 0, -1}, + + {25, GENMASK(1, 0), pll_mux_table, NPCM8XX_CLK_S_RG_MUX, + pll_mux_parents, ARRAY_SIZE(pll_mux_parents), 0, -1}, + + {27, GENMASK(1, 0), pll_mux_table, NPCM8XX_CLK_S_RCP_MUX, + pll_mux_parents, ARRAY_SIZE(pll_mux_parents), 0, -1}, +}; + +/* configurable dividers: */ +static const struct npcm8xx_clk_div_data npcm8xx_divs[] = { + {NPCM8XX_CLKDIV1, 28, 3, NPCM8XX_CLK_S_ADC, NPCM8XX_CLK_S_PRE_ADC, + CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, + NPCM8XX_CLK_ADC}, + /* bit 30-28 ADCCKDIV*/ + {NPCM8XX_CLKDIV1, 26, 2, NPCM8XX_CLK_S_AHB, NPCM8XX_CLK_S_PRE_CLK, + CLK_DIVIDER_READ_ONLY, CLK_IS_CRITICAL, NPCM8XX_CLK_AHB}, + /* bit 28-26 CLK4DIV*/ + {NPCM8XX_CLKDIV1, 21, 5, NPCM8XX_CLK_S_PRE_ADC, + NPCM8XX_CLK_S_ADC_MUX, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_PRE_ADC}, + /* bit 25-21 PRE-ADCCKDIV*/ + {NPCM8XX_CLKDIV1, 16, 5, NPCM8XX_CLK_S_UART, + NPCM8XX_CLK_S_UART_MUX, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_UART}, + /* bit 20-16 UARTDIV*/ + {NPCM8XX_CLKDIV1, 11, 5, NPCM8XX_CLK_S_MMC, + NPCM8XX_CLK_S_SD_MUX, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_MMC}, + /* bit 15-11 MMCCKDIV*/ + {NPCM8XX_CLKDIV1, 6, 5, NPCM8XX_CLK_S_SPI3, + NPCM8XX_CLK_S_AHB, 0, 0, NPCM8XX_CLK_SPI3}, + /* bit 10-6 AHB3CKDIV*/ + {NPCM8XX_CLKDIV1, 2, 4, NPCM8XX_CLK_S_PCI, + NPCM8XX_CLK_S_GFX_MUX, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_PCI}, + /* bit 5-2 PCICKDIV*/ + + {NPCM8XX_CLKDIV2, 30, 2, NPCM8XX_CLK_S_APB4, NPCM8XX_CLK_S_AHB, + CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, + NPCM8XX_CLK_APB4}, + /* bit 31-30 APB4CKDIV*/ + {NPCM8XX_CLKDIV2, 28, 2, NPCM8XX_CLK_S_APB3, NPCM8XX_CLK_S_AHB, + CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, + NPCM8XX_CLK_APB3}, + /* bit 29-28 APB3CKDIV*/ + {NPCM8XX_CLKDIV2, 26, 2, NPCM8XX_CLK_S_APB2, NPCM8XX_CLK_S_AHB, + CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, + NPCM8XX_CLK_APB2}, + /* bit 28-26 APB2CKDIV*/ + {NPCM8XX_CLKDIV2, 24, 2, NPCM8XX_CLK_S_APB1, NPCM8XX_CLK_S_AHB, + CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, + NPCM8XX_CLK_APB1}, + /* bit 25-24 APB1CKDIV*/ + {NPCM8XX_CLKDIV2, 22, 2, NPCM8XX_CLK_S_APB5, NPCM8XX_CLK_S_AHB, + CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, + NPCM8XX_CLK_APB5}, + /* bit 23-22 APB5CKDIV*/ + {NPCM8XX_CLKDIV2, 16, 5, NPCM8XX_CLK_S_CLKOUT, NPCM8XX_CLK_S_CLKOUT_MUX, + CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_CLKOUT}, + /* bit 20-16 CLKOUTDIV*/ + {NPCM8XX_CLKDIV2, 13, 3, NPCM8XX_CLK_S_GFX, NPCM8XX_CLK_S_GFX_MUX, + CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_GFX}, + /* bit 15-13 GFXCKDIV*/ + {NPCM8XX_CLKDIV2, 8, 5, NPCM8XX_CLK_S_USB_BRIDGE, NPCM8XX_CLK_S_SU_MUX, + CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_SU}, + /* bit 12-8 SUCKDIV*/ + {NPCM8XX_CLKDIV2, 4, 4, NPCM8XX_CLK_S_USB_HOST, NPCM8XX_CLK_S_SU_MUX, + CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_SU48}, + /* bit 8-4 SU48CKDIV*/ + {NPCM8XX_CLKDIV2, 0, 4, NPCM8XX_CLK_S_SDHC, + NPCM8XX_CLK_S_SD_MUX, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_SDHC} + ,/* bit 3-0 SD1CKDIV*/ + + {NPCM8XX_CLKDIV3, 16, 8, NPCM8XX_CLK_S_SPI1, + NPCM8XX_CLK_S_AHB, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_SPI1}, + /* bit 23-16 SPI1CKDV*/ + {NPCM8XX_CLKDIV3, 11, 5, NPCM8XX_CLK_S_UART2, + NPCM8XX_CLK_S_UART_MUX, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_UART2}, + /* bit 15-11 UARTDIV2*/ + {NPCM8XX_CLKDIV3, 6, 5, NPCM8XX_CLK_S_SPI0, + NPCM8XX_CLK_S_AHB, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_SPI0}, + /* bit 10-6 SPI0CKDV*/ + {NPCM8XX_CLKDIV3, 1, 5, NPCM8XX_CLK_S_SPIX, + NPCM8XX_CLK_S_AHB, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_SPIX}, + /* bit 5-1 SPIXCKDV*/ + + {NPCM8XX_CLKDIV4, 28, 4, NPCM8XX_CLK_S_RG, NPCM8XX_CLK_S_RG_MUX, + CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_RG}, + /* bit 31-28 RGREFDIV*/ + {NPCM8XX_CLKDIV4, 12, 4, NPCM8XX_CLK_S_RCP, NPCM8XX_CLK_S_RCP_MUX, + CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_RCP}, + /* bit 15-12 RCPREFDIV*/ + {NPCM8XX_THRTL_CNT, 0, 2, NPCM8XX_CLK_S_TH, NPCM8XX_CLK_S_CPU_MUX, + CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, NPCM8XX_CLK_TH}, + /* bit 1-0 TH_DIV*/ +}; + +static DEFINE_SPINLOCK(npcm8xx_clk_lock); + +static int npcm8xx_clk_probe(struct platform_device *pdev) +{ + struct clk_hw_onecell_data *npcm8xx_clk_data; + struct device *dev = &pdev->dev; + void __iomem *clk_base; + struct clk_hw *hw; + int i, err; + + npcm8xx_clk_data = devm_kzalloc(dev, struct_size(npcm8xx_clk_data, hws, + NPCM8XX_NUM_CLOCKS), + GFP_KERNEL); + if (!npcm8xx_clk_data) + return -ENOMEM; + + clk_base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(clk_base)) + return PTR_ERR(clk_base); + + npcm8xx_clk_data->num = NPCM8XX_NUM_CLOCKS; + + for (i = 0; i < NPCM8XX_NUM_CLOCKS; i++) + npcm8xx_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER); + + /* Reference 25MHz clock */ + hw = clk_hw_register_fixed_rate(dev, "refclk", NULL, 0, NPCM8XX_REF_CLK); + if (IS_ERR(hw)) + return PTR_ERR(hw); + npcm8xx_clk_data->hws[NPCM8XX_CLK_REFCLK] = hw; + + /* Register plls */ + for (i = 0; i < ARRAY_SIZE(npcm8xx_plls); i++) { + const struct npcm8xx_clk_pll_data *pll_data = &npcm8xx_plls[i]; + + hw = npcm8xx_clk_register_pll(dev, clk_base + pll_data->reg, + pll_data->name, + pll_data->parent_name, + pll_data->flags); + if (IS_ERR(hw)) { + dev_err(dev, "npcm8xx_clk: Can't register pll\n"); + goto unregister_refclk; + } + + if (pll_data->onecell_idx >= 0) + npcm8xx_clk_data->hws[pll_data->onecell_idx] = hw; + } + + /* Register fixed dividers */ + hw = devm_clk_hw_register_fixed_factor(dev, NPCM8XX_CLK_S_PLL1_DIV2, + NPCM8XX_CLK_S_PLL1, 0, 1, 2); + if (IS_ERR(hw)) { + dev_err(dev, "npcm8xx_clk: Can't register fixed div\n"); + goto unregister_refclk; + } + + hw = devm_clk_hw_register_fixed_factor(dev, NPCM8XX_CLK_S_PLL2_DIV2, + NPCM8XX_CLK_S_PLL2, 0, 1, 2); + if (IS_ERR(hw)) { + dev_err(dev, "npcm8xx_clk: Can't register pll div2\n"); + goto unregister_refclk; + } + + hw = devm_clk_hw_register_fixed_factor(dev, NPCM8XX_CLK_S_PRE_CLK, + NPCM8XX_CLK_S_CPU_MUX, 0, 1, 2); + if (IS_ERR(hw)) { + dev_err(dev, "npcm8xx_clk: Can't register ckclk div2\n"); + goto unregister_refclk; + } + + hw = devm_clk_hw_register_fixed_factor(dev, NPCM8XX_CLK_S_AXI, + NPCM8XX_CLK_S_TH, 0, 1, 2); + if (IS_ERR(hw)) { + dev_err(dev, "npcm8xx_clk: Can't register axi div2\n"); + goto unregister_refclk; + } + + hw = devm_clk_hw_register_fixed_factor(dev, NPCM8XX_CLK_S_ATB, + NPCM8XX_CLK_S_AXI, 0, 1, 2); + if (IS_ERR(hw)) { + dev_err(dev, "npcm8xx_clk: Can't register atb div2\n"); + goto unregister_refclk; + } + + /* Register clock dividers specified in npcm8xx_divs */ + for (i = 0; i < ARRAY_SIZE(npcm8xx_divs); i++) { + const struct npcm8xx_clk_div_data *div_data = &npcm8xx_divs[i]; + + hw = devm_clk_hw_register_divider(dev, div_data->name, + div_data->parent_name, + div_data->flags, + clk_base + div_data->reg, + div_data->shift, + div_data->width, + div_data->clk_divider_flags, + &npcm8xx_clk_lock); + if (IS_ERR(hw)) { + dev_err(dev, "npcm8xx_clk: Can't register div table\n"); + goto unregister_refclk; + } + + if (div_data->onecell_idx >= 0) + npcm8xx_clk_data->hws[div_data->onecell_idx] = hw; + } + + /* Register muxes */ + for (i = 0; i < ARRAY_SIZE(npcm8xx_muxes); i++) { + const struct npcm8xx_clk_mux_data *mux_data = &npcm8xx_muxes[i]; + + hw = clk_hw_register_mux_table(dev, mux_data->name, + mux_data->parent_names, + mux_data->num_parents, + mux_data->flags, + clk_base + NPCM8XX_CLKSEL, + mux_data->shift, + mux_data->mask, 0, + mux_data->table, + &npcm8xx_clk_lock); + + if (IS_ERR(hw)) { + dev_err(dev, "npcm8xx_clk: Can't register mux\n"); + goto err_mux_clk; + } + + if (mux_data->onecell_idx >= 0) + npcm8xx_clk_data->hws[mux_data->onecell_idx] = hw; + } + + err = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, + npcm8xx_clk_data); + if (err) { + dev_err(dev, "unable to add clk provider\n"); + goto unregister_refclk; + } + + return err; + +err_mux_clk: + while (i--) { + if (npcm8xx_muxes[i].onecell_idx >= 0) + clk_hw_unregister_mux(npcm8xx_clk_data->hws[npcm8xx_muxes[i].onecell_idx]); + } +unregister_refclk: + clk_hw_unregister(npcm8xx_clk_data->hws[NPCM8XX_CLK_REFCLK]); + return PTR_ERR(hw); +} + +static const struct of_device_id npcm8xx_clk_dt_ids[] = { + { .compatible = "nuvoton,npcm845-clk", }, + { } +}; +MODULE_DEVICE_TABLE(of, npcm8xx_clk_dt_ids); + +static struct platform_driver npcm8xx_clk_driver = { + .probe = npcm8xx_clk_probe, + .driver = { + .name = "npcm8xx_clk", + .of_match_table = npcm8xx_clk_dt_ids, + }, +}; + +static int __init npcm8xx_clk_driver_init(void) +{ + return platform_driver_register(&npcm8xx_clk_driver); +} +arch_initcall(npcm8xx_clk_driver_init); +