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X-OriginatorOrg: nuvoton.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Sep 2023 19:45:18.0852 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1e0bba75-f49c-4288-45dc-08dbc05b7178 X-MS-Exchange-CrossTenant-Id: a3f24931-d403-4b4a-94f1-7d83ac638e07 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=a3f24931-d403-4b4a-94f1-7d83ac638e07;Ip=[211.75.126.7];Helo=[NTHCCAS01.nuvoton.com] X-MS-Exchange-CrossTenant-AuthSource: HK2PEPF00006FB1.apcprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SG2PR03MB6730 Precedence: bulk List-ID: X-Mailing-List: linux-clk@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 Acked-by: Joel Stanley --- Changes since version 18: - NPCM8XX clock driver did not changed from version 18 only build and tested under kernel 6.6-rc1. Changes since version 17: - NPCM8XX clock driver did not changed from version 17 only build and tested under kernel 6.5-rc3. Changes since version 16: - NPCM8XX clock driver - Using devm_kzalloc instead kzalloc. - Remove unnecessary parenthesis. - Modify incorrect spelling. Changes since version 15: - NPCM8XX clock driver - Remove unused regs parameter from npcm8xx_pll_data structure. - Using index and clk_hw parameters to set the clock parent in the clock structures. Changes since version 14: - NPCM8XX clock driver - Remove unnecessary register definitions. - Remove the internal reference clock, instead use the external DT reference clock. - rearrange the driver. - using .names parameter in DT to define clock (refclk). Changes since version 13: - NPCM8XX clock driver - Remove unnecessary definitions and add module.h define - Use in clk_parent_data struct.fw_name and .name. - Add module_exit function. - Add const to divider clock names. - Add MODULE_DESCRIPTION and MODULE_LICENSE Changes since version 12: - NPCM8XX clock driver - Use clk_parent_data in mux and div clock structure. - Add const to mux tables. - Using devm_clk_hw_register_fixed_rate function. - use only .name clk_parent_data instead .name and .fw_name. - Modify mask values in mux clocks. Changes since version 11: - NPCM8XX clock driver - Modify Kconfig help. - Modify loop variable to unsigned int. Changes since version 11: - NPCM8XX clock driver - Modify Kconfig help. - Modify loop variable to unsigned int. Changes since version 10: - NPCM8XX clock driver - Fix const warning. Changes since version 9: - NPCM8XX clock driver - Move configuration place. - Using clk_parent_data instead of parent_name - using devm_ioremap instead of ioremap. deeply sorry, I know we had a long discussion on what should the driver use, from other examples (also in other clock drivers) I see the combination of platform_get_resource and devm_ioremap are commonly used and it answer the reset and clock needs. Changes since version 8: - NPCM8XX clock driver - Move configuration place. - Add space before and aftre '{' '}'. - Handle devm_of_clk_add_hw_provider function error. Changes since version 7: - NPCM8XX clock driver - The clock and reset registers using the same memory region, due to it the clock driver should claim the ioremap directly without checking the memory region. Changes since version 5: - NPCM8XX clock driver - Remove refclk if devm_of_clk_add_hw_provider function failed. Changes since version 4: - NPCM8XX clock driver - Use the same quote in the dt-binding file. Changes since version 3: - NPCM8XX clock driver - Rename NPCM8xx clock dt-binding header file. - Remove unused structures. - Improve Handling the clocks registration. Changes since version 2: - NPCM8XX clock driver - Add debug new line. - Add 25M fixed rate clock. - Remove unused clocks and clock name from dt-binding. Changes since version 1: - NPCM8XX clock driver - Modify dt-binding. - Remove unsed definition and include. - Include alphabetically. - Use clock devm. drivers/clk/Kconfig | 8 + drivers/clk/Makefile | 1 + drivers/clk/clk-npcm8xx.c | 565 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 574 insertions(+) create mode 100644 drivers/clk/clk-npcm8xx.c diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index c30099866174..9bc5f2dfc7e2 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -325,6 +325,14 @@ config COMMON_CLK_LOCHNAGAR This driver supports the clocking features of the Cirrus Logic Lochnagar audio development board. +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, + all the clocks are initialized by the bootloader, so this driver + allows only reading of current settings directly from the hardware. + config COMMON_CLK_LOONGSON2 bool "Clock driver for Loongson-2 SoC" depends on LOONGARCH || COMPILE_TEST diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 18969cbd4bb1..e2cbc6cceb8c 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -51,6 +51,7 @@ 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-$(CONFIG_COMMON_CLK_PALMAS) += clk-palmas.o obj-$(CONFIG_CLK_LS1028A_PLLDIG) += clk-plldig.o diff --git a/drivers/clk/clk-npcm8xx.c b/drivers/clk/clk-npcm8xx.c new file mode 100644 index 000000000000..16c50aa9cb65 --- /dev/null +++ b/drivers/clk/clk-npcm8xx.c @@ -0,0 +1,565 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Nuvoton NPCM8xx Clock Generator + * All the clocks are initialized by the bootloader, so this driver allows 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 + +/* npcm8xx clock registers*/ +#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_PLLCONG 0x60 +#define NPCM8XX_THRTL_CNT 0xC0 + +#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) + +struct npcm8xx_clk_pll { + void __iomem *pllcon; + unsigned int id; + const char *name; + unsigned long flags; + struct clk_hw hw; +}; + +#define to_npcm8xx_clk_pll(_hw) container_of(_hw, struct npcm8xx_clk_pll, hw) + +struct npcm8xx_pll_data { + const char *name; + struct clk_parent_data parent; + unsigned int reg; + unsigned long flags; + struct clk_hw hw; +}; + +struct npcm8xx_clk_div_data { + u32 reg; + u8 shift; + u8 width; + const char *name; + const struct clk_parent_data parent_data; + u8 clk_divider_flags; + unsigned long flags; + int onecell_idx; +}; + +struct npcm8xx_clk_mux_data { + u8 shift; + u32 mask; + const u32 *table; + const char *name; + const struct clk_parent_data *parent_data; + u8 num_parents; + unsigned long flags; + struct clk_hw hw; +}; + +/* external clock definition */ +#define NPCM8XX_CLK_S_REFCLK "refclk" + +/* pll definition */ +#define NPCM8XX_CLK_S_PLL0 "pll0" +#define NPCM8XX_CLK_S_PLL1 "pll1" +#define NPCM8XX_CLK_S_PLL2 "pll2" +#define NPCM8XX_CLK_S_PLL_GFX "pll_gfx" + +/* early divider definition */ +#define NPCM8XX_CLK_S_PLL2_DIV2 "pll2_div2" +#define NPCM8XX_CLK_S_PLL_GFX_DIV2 "pll_gfx_div2" +#define NPCM8XX_CLK_S_PLL1_DIV2 "pll1_div2" + +/* mux definition */ +#define NPCM8XX_CLK_S_CPU_MUX "cpu_mux" +#define NPCM8XX_CLK_S_PIX_MUX "gfx_pixel_mux" +#define NPCM8XX_CLK_S_SD_MUX "sd_mux" +#define NPCM8XX_CLK_S_UART_MUX "uart_mux" +#define NPCM8XX_CLK_S_SU_MUX "serial_usb_mux" +#define NPCM8XX_CLK_S_MC_MUX "mc_mux" +#define NPCM8XX_CLK_S_ADC_MUX "adc_mux" +#define NPCM8XX_CLK_S_GFX_MUX "gfx_mux" +#define NPCM8XX_CLK_S_CLKOUT_MUX "clkout_mux" +#define NPCM8XX_CLK_S_GFXM_MUX "gfxm_mux" +#define NPCM8XX_CLK_S_DVC_MUX "dvc_mux" +#define NPCM8XX_CLK_S_RG_MUX "rg_mux" +#define NPCM8XX_CLK_S_RCP_MUX "rcp_mux" + +/* div definition */ +#define NPCM8XX_CLK_S_MC "mc" +#define NPCM8XX_CLK_S_AXI "axi" +#define NPCM8XX_CLK_S_AHB "ahb" +#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 "rg" +#define NPCM8XX_CLK_S_RCP "rcp" + +static struct clk_hw hw_pll1_div2, hw_pll2_div2, hw_gfx_div2, hw_pre_clk; +static struct npcm8xx_pll_data npcm8xx_pll_clks[] = { + { NPCM8XX_CLK_S_PLL0, { .name = NPCM8XX_CLK_S_REFCLK }, NPCM8XX_PLLCON0, 0 }, + { NPCM8XX_CLK_S_PLL1, { .name = NPCM8XX_CLK_S_REFCLK }, NPCM8XX_PLLCON1, 0 }, + { NPCM8XX_CLK_S_PLL2, { .name = NPCM8XX_CLK_S_REFCLK }, NPCM8XX_PLLCON2, 0 }, + { NPCM8XX_CLK_S_PLL_GFX, { .name = NPCM8XX_CLK_S_REFCLK }, NPCM8XX_PLLCONG, 0 }, +}; + +static const u32 cpuck_mux_table[] = { 0, 1, 2, 7 }; +static const struct clk_parent_data cpuck_mux_parents[] = { + { .hw = &npcm8xx_pll_clks[0].hw }, + { .hw = &npcm8xx_pll_clks[1].hw }, + { .index = 0 }, + { .hw = &npcm8xx_pll_clks[2].hw } +}; + +static const u32 pixcksel_mux_table[] = { 0, 2 }; +static const struct clk_parent_data pixcksel_mux_parents[] = { + { .hw = &npcm8xx_pll_clks[3].hw }, + { .index = 0 } +}; + +static const u32 default_mux_table[] = { 0, 1, 2, 3 }; +static const struct clk_parent_data default_mux_parents[] = { + { .hw = &npcm8xx_pll_clks[0].hw }, + { .hw = &npcm8xx_pll_clks[1].hw }, + { .index = 0 }, + { .hw = &hw_pll2_div2 } +}; + +static const u32 sucksel_mux_table[] = { 2, 3 }; +static const struct clk_parent_data sucksel_mux_parents[] = { + { .index = 0 }, + { .hw = &hw_pll2_div2 } +}; + +static const u32 mccksel_mux_table[] = { 0, 2 }; +static const struct clk_parent_data mccksel_mux_parents[] = { + { .hw = &hw_pll1_div2 }, + { .index = 0 } +}; + +static const u32 clkoutsel_mux_table[] = { 0, 1, 2, 3, 4 }; +static const struct clk_parent_data clkoutsel_mux_parents[] = { + { .hw = &npcm8xx_pll_clks[0].hw }, + { .hw = &npcm8xx_pll_clks[1].hw }, + { .index = 0 }, + { .hw = &hw_gfx_div2 }, + { .hw = &hw_pll2_div2 } +}; + +static const u32 gfxmsel_mux_table[] = { 2, 3 }; +static const struct clk_parent_data gfxmsel_mux_parents[] = { + { .index = 0 }, + { .hw = &npcm8xx_pll_clks[2].hw } +}; + +static const u32 dvcssel_mux_table[] = { 2, 3 }; +static const struct clk_parent_data dvcssel_mux_parents[] = { + { .index = 0 }, + { .hw = &npcm8xx_pll_clks[2].hw } +}; + +static const u32 default3_mux_table[] = { 0, 1, 2 }; +static const struct clk_parent_data default3_mux_parents[] = { + { .hw = &npcm8xx_pll_clks[0].hw }, + { .hw = &npcm8xx_pll_clks[1].hw }, + { .index = 0 } +}; + +static struct npcm8xx_clk_mux_data npcm8xx_muxes[] = { + { 0, 3, cpuck_mux_table, NPCM8XX_CLK_S_CPU_MUX, cpuck_mux_parents, + ARRAY_SIZE(cpuck_mux_parents), CLK_IS_CRITICAL }, + { 4, 2, pixcksel_mux_table, NPCM8XX_CLK_S_PIX_MUX, pixcksel_mux_parents, + ARRAY_SIZE(pixcksel_mux_parents), 0 }, + { 6, 2, default_mux_table, NPCM8XX_CLK_S_SD_MUX, default_mux_parents, + ARRAY_SIZE(default_mux_parents), 0 }, + { 8, 2, default_mux_table, NPCM8XX_CLK_S_UART_MUX, default_mux_parents, + ARRAY_SIZE(default_mux_parents), 0 }, + { 10, 2, sucksel_mux_table, NPCM8XX_CLK_S_SU_MUX, sucksel_mux_parents, + ARRAY_SIZE(sucksel_mux_parents), 0 }, + { 12, 2, mccksel_mux_table, NPCM8XX_CLK_S_MC_MUX, mccksel_mux_parents, + ARRAY_SIZE(mccksel_mux_parents), 0 }, + { 14, 2, default_mux_table, NPCM8XX_CLK_S_ADC_MUX, default_mux_parents, + ARRAY_SIZE(default_mux_parents), 0 }, + { 16, 2, default_mux_table, NPCM8XX_CLK_S_GFX_MUX, default_mux_parents, + ARRAY_SIZE(default_mux_parents), 0 }, + { 18, 3, clkoutsel_mux_table, NPCM8XX_CLK_S_CLKOUT_MUX, clkoutsel_mux_parents, + ARRAY_SIZE(clkoutsel_mux_parents), 0 }, + { 21, 2, gfxmsel_mux_table, NPCM8XX_CLK_S_GFXM_MUX, gfxmsel_mux_parents, + ARRAY_SIZE(gfxmsel_mux_parents), 0 }, + { 23, 2, dvcssel_mux_table, NPCM8XX_CLK_S_DVC_MUX, dvcssel_mux_parents, + ARRAY_SIZE(dvcssel_mux_parents), 0 }, + { 25, 2, default3_mux_table, NPCM8XX_CLK_S_RG_MUX, default3_mux_parents, + ARRAY_SIZE(default3_mux_parents), 0 }, + { 27, 2, default3_mux_table, NPCM8XX_CLK_S_RCP_MUX, default3_mux_parents, + ARRAY_SIZE(default3_mux_parents), 0 }, +}; + +/* configurable dividers: */ +static const struct npcm8xx_clk_div_data npcm8xx_divs[] = { + { NPCM8XX_CLKDIV1, 28, 3, NPCM8XX_CLK_S_ADC, + { .name = NPCM8XX_CLK_S_PRE_ADC, .index = -1 }, + CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, NPCM8XX_CLK_ADC }, + { NPCM8XX_CLKDIV1, 26, 2, NPCM8XX_CLK_S_AHB, { .hw = &hw_pre_clk }, + CLK_DIVIDER_READ_ONLY, CLK_IS_CRITICAL, NPCM8XX_CLK_AHB }, + { NPCM8XX_CLKDIV1, 21, 5, NPCM8XX_CLK_S_PRE_ADC, + { .hw = &npcm8xx_muxes[6].hw }, CLK_DIVIDER_READ_ONLY, 0, -1 }, + { NPCM8XX_CLKDIV1, 16, 5, NPCM8XX_CLK_S_UART, + { .hw = &npcm8xx_muxes[3].hw }, 0, 0, NPCM8XX_CLK_UART }, + { NPCM8XX_CLKDIV1, 11, 5, NPCM8XX_CLK_S_MMC, + { .hw = &npcm8xx_muxes[2].hw }, CLK_DIVIDER_READ_ONLY, 0, + NPCM8XX_CLK_MMC }, + { NPCM8XX_CLKDIV1, 6, 5, NPCM8XX_CLK_S_SPI3, + { .fw_name = NPCM8XX_CLK_S_AHB, .name = NPCM8XX_CLK_S_AHB }, 0, 0, + NPCM8XX_CLK_SPI3 }, + { NPCM8XX_CLKDIV1, 2, 4, NPCM8XX_CLK_S_PCI, + { .hw = &npcm8xx_muxes[7].hw }, CLK_DIVIDER_READ_ONLY, 0, + NPCM8XX_CLK_PCI }, + + { NPCM8XX_CLKDIV2, 30, 2, NPCM8XX_CLK_S_APB4, + { .fw_name = NPCM8XX_CLK_S_AHB, .name = NPCM8XX_CLK_S_AHB }, + CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, NPCM8XX_CLK_APB4 }, + { NPCM8XX_CLKDIV2, 28, 2, NPCM8XX_CLK_S_APB3, + { .fw_name = NPCM8XX_CLK_S_AHB, .name = NPCM8XX_CLK_S_AHB }, + CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, NPCM8XX_CLK_APB3 }, + { NPCM8XX_CLKDIV2, 26, 2, NPCM8XX_CLK_S_APB2, + { .fw_name = NPCM8XX_CLK_S_AHB, .name = NPCM8XX_CLK_S_AHB }, + CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, NPCM8XX_CLK_APB2 }, + { NPCM8XX_CLKDIV2, 24, 2, NPCM8XX_CLK_S_APB1, + { .fw_name = NPCM8XX_CLK_S_AHB, .name = NPCM8XX_CLK_S_AHB }, + CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, NPCM8XX_CLK_APB1 }, + { NPCM8XX_CLKDIV2, 22, 2, NPCM8XX_CLK_S_APB5, + { .fw_name = NPCM8XX_CLK_S_AHB, .name = NPCM8XX_CLK_S_AHB }, + CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, NPCM8XX_CLK_APB5 }, + { NPCM8XX_CLKDIV2, 16, 5, NPCM8XX_CLK_S_CLKOUT, + { .hw = &npcm8xx_muxes[8].hw }, CLK_DIVIDER_READ_ONLY, 0, + NPCM8XX_CLK_CLKOUT }, + { NPCM8XX_CLKDIV2, 13, 3, NPCM8XX_CLK_S_GFX, + { .hw = &npcm8xx_muxes[7].hw }, CLK_DIVIDER_READ_ONLY, 0, + NPCM8XX_CLK_GFX }, + { NPCM8XX_CLKDIV2, 8, 5, NPCM8XX_CLK_S_USB_BRIDGE, + { .hw = &npcm8xx_muxes[4].hw }, CLK_DIVIDER_READ_ONLY, 0, + NPCM8XX_CLK_SU }, + { NPCM8XX_CLKDIV2, 4, 4, NPCM8XX_CLK_S_USB_HOST, + { .hw = &npcm8xx_muxes[4].hw }, CLK_DIVIDER_READ_ONLY, 0, + NPCM8XX_CLK_SU48 }, + { NPCM8XX_CLKDIV2, 0, 4, NPCM8XX_CLK_S_SDHC, + { .hw = &npcm8xx_muxes[2].hw }, CLK_DIVIDER_READ_ONLY, 0, + NPCM8XX_CLK_SDHC }, + + { NPCM8XX_CLKDIV3, 16, 8, NPCM8XX_CLK_S_SPI1, + { .fw_name = NPCM8XX_CLK_S_AHB, .name = NPCM8XX_CLK_S_AHB }, + CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_SPI1 }, + { NPCM8XX_CLKDIV3, 11, 5, NPCM8XX_CLK_S_UART2, + { .hw = &npcm8xx_muxes[3].hw }, CLK_DIVIDER_READ_ONLY, 0, + NPCM8XX_CLK_UART2 }, + { NPCM8XX_CLKDIV3, 6, 5, NPCM8XX_CLK_S_SPI0, + { .fw_name = NPCM8XX_CLK_S_AHB, .name = NPCM8XX_CLK_S_AHB }, + CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_SPI0 }, + { NPCM8XX_CLKDIV3, 1, 5, NPCM8XX_CLK_S_SPIX, + { .fw_name = NPCM8XX_CLK_S_AHB, .name = NPCM8XX_CLK_S_AHB }, + CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_SPIX }, + + { NPCM8XX_CLKDIV4, 28, 4, NPCM8XX_CLK_S_RG, + { .hw = &npcm8xx_muxes[11].hw }, CLK_DIVIDER_READ_ONLY, 0, + NPCM8XX_CLK_RG }, + { NPCM8XX_CLKDIV4, 12, 4, NPCM8XX_CLK_S_RCP, + { .hw = &npcm8xx_muxes[12].hw }, CLK_DIVIDER_READ_ONLY, 0, + NPCM8XX_CLK_RCP }, + + { NPCM8XX_THRTL_CNT, 0, 2, NPCM8XX_CLK_S_TH, + { .hw = &npcm8xx_muxes[0].hw }, + CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, NPCM8XX_CLK_TH }, +}; + +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 struct clk_parent_data *parent, + unsigned long flags) +{ + struct npcm8xx_clk_pll *pll; + struct clk_init_data init = {}; + int ret; + + pll = devm_kzalloc(dev, sizeof(*pll), GFP_KERNEL); + if (!pll) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &npcm8xx_clk_pll_ops; + init.parent_data = parent; + init.num_parents = 1; + init.flags = flags; + + pll->pllcon = pllcon; + pll->hw.init = &init; + + ret = devm_clk_hw_register(dev, &pll->hw); + if (ret) { + kfree(pll); + return ERR_PTR(ret); + } + + return &pll->hw; +} + +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 resource *res; + struct clk_hw *hw; + unsigned int i; + int err; + + npcm8xx_clk_data = devm_kzalloc(dev, struct_size(npcm8xx_clk_data, hws, + NPCM8XX_NUM_CLOCKS), + GFP_KERNEL); + if (!npcm8xx_clk_data) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + clk_base = devm_ioremap(dev, res->start, resource_size(res)); + if (!clk_base) { + dev_err(&pdev->dev, "Failed to remap I/O memory\n"); + return -ENOMEM; + } + + npcm8xx_clk_data->num = NPCM8XX_NUM_CLOCKS; + + for (i = 0; i < NPCM8XX_NUM_CLOCKS; i++) + npcm8xx_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER); + + /* Register plls */ + for (i = 0; i < ARRAY_SIZE(npcm8xx_pll_clks); i++) { + struct npcm8xx_pll_data *pll_clk = &npcm8xx_pll_clks[i]; + + hw = npcm8xx_clk_register_pll(dev, clk_base + pll_clk->reg, + pll_clk->name, &pll_clk->parent, + pll_clk->flags); + if (IS_ERR(hw)) { + dev_err(dev, "npcm8xx_clk: Can't register pll\n"); + return PTR_ERR(hw); + } + pll_clk->hw = *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"); + return PTR_ERR(hw); + } + hw_pll1_div2 = *hw; + + 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 pll2 div2\n"); + return PTR_ERR(hw); + } + hw_pll2_div2 = *hw; + + hw = devm_clk_hw_register_fixed_factor(dev, NPCM8XX_CLK_S_PLL_GFX_DIV2, + NPCM8XX_CLK_S_PLL_GFX, 0, 1, 2); + if (IS_ERR(hw)) { + dev_err(dev, "npcm8xx_clk: Can't register gfx div2\n"); + return PTR_ERR(hw); + } + hw_gfx_div2 = *hw; + + /* Register muxes */ + for (i = 0; i < ARRAY_SIZE(npcm8xx_muxes); i++) { + struct npcm8xx_clk_mux_data *mux_data = &npcm8xx_muxes[i]; + + hw = devm_clk_hw_register_mux_parent_data_table(dev, + mux_data->name, + mux_data->parent_data, + 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"); + return PTR_ERR(hw); + } + mux_data->hw = *hw; + } + + 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 pre clk div2\n"); + return PTR_ERR(hw); + } + hw_pre_clk = *hw; + + 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"); + return PTR_ERR(hw); + } + npcm8xx_clk_data->hws[NPCM8XX_CLK_AXI] = hw; + + 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"); + return PTR_ERR(hw); + } + npcm8xx_clk_data->hws[NPCM8XX_CLK_ATB] = hw; + + /* 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 = clk_hw_register_divider_parent_data(dev, div_data->name, + &div_data->parent_data, + 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 err_div_clk; + } + + if (div_data->onecell_idx >= 0) + npcm8xx_clk_data->hws[div_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"); + hw = ERR_PTR(err); + goto err_div_clk; + } + + return err; + +err_div_clk: + while (i--) + if (npcm8xx_divs[i].onecell_idx >= 0) + clk_hw_unregister_divider(npcm8xx_clk_data->hws[npcm8xx_divs[i].onecell_idx]); + + 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); + +static void __exit npcm8xx_clk_exit(void) +{ + platform_driver_unregister(&npcm8xx_clk_driver); +} +module_exit(npcm8xx_clk_exit); + +MODULE_DESCRIPTION("Clock driver for Nuvoton NPCM8XX BMC SoC"); +MODULE_AUTHOR("Tomer Maimon "); +MODULE_LICENSE("GPL v2"); +