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u-boot/drivers/clk/imx/clk-imx6q.c

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clk: Port Linux common clock framework [CCF] for imx6q to U-boot (tag: v5.1.12) This patch brings the files from Linux kernel (linux-stable/linux-5.1.y SHA1: 5752b50477da)to provide clocks support as it is used on the Linux kernel with Common Clock Framework [CCF] setup. The directory structure has been preserved. The ported code only supports reading information from PLL, MUX, Divider, etc and enabling/disabling the clocks USDHCx/ECSPIx depending on used bus. Moreover, it is agnostic to the alias numbering as the information about the clock is read from the device tree. One needs to pay attention to the comments indicating necessary for U-Boot's driver model changes. If needed, the code can be extended to support the "set" part of the clock management. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2019-06-24 13:50:45 +00:00
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2019 DENX Software Engineering
* Lukasz Majewski, DENX Software Engineering, lukma@denx.de
*/
#include <common.h>
#include <clk-uclass.h>
#include <dm.h>
common: Drop log.h from common header Move this header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-10 17:40:05 +00:00
#include <log.h>
clk: Port Linux common clock framework [CCF] for imx6q to U-boot (tag: v5.1.12) This patch brings the files from Linux kernel (linux-stable/linux-5.1.y SHA1: 5752b50477da)to provide clocks support as it is used on the Linux kernel with Common Clock Framework [CCF] setup. The directory structure has been preserved. The ported code only supports reading information from PLL, MUX, Divider, etc and enabling/disabling the clocks USDHCx/ECSPIx depending on used bus. Moreover, it is agnostic to the alias numbering as the information about the clock is read from the device tree. One needs to pay attention to the comments indicating necessary for U-Boot's driver model changes. If needed, the code can be extended to support the "set" part of the clock management. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2019-06-24 13:50:45 +00:00
#include <asm/arch/clock.h>
#include <asm/arch/imx-regs.h>
#include <dt-bindings/clock/imx6qdl-clock.h>
#include "clk.h"
clk: Use generic CCF ops where possible This converts most CCF drivers to use generic ops. imx6q is the only outlier, where we retain the existing functionality by moving the check to request(). Signed-off-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com> Reviewed-by: Peng Fan <peng.fan@nxp.com> Link: https://lore.kernel.org/r/20220320203446.740178-2-seanga2@gmail.com [ fixed missing include for at91 ] Signed-off-by: Sean Anderson <seanga2@gmail.com>
2022-03-20 20:34:46 +00:00
static int imx6q_clk_request(struct clk *clk)
clk: Port Linux common clock framework [CCF] for imx6q to U-boot (tag: v5.1.12) This patch brings the files from Linux kernel (linux-stable/linux-5.1.y SHA1: 5752b50477da)to provide clocks support as it is used on the Linux kernel with Common Clock Framework [CCF] setup. The directory structure has been preserved. The ported code only supports reading information from PLL, MUX, Divider, etc and enabling/disabling the clocks USDHCx/ECSPIx depending on used bus. Moreover, it is agnostic to the alias numbering as the information about the clock is read from the device tree. One needs to pay attention to the comments indicating necessary for U-Boot's driver model changes. If needed, the code can be extended to support the "set" part of the clock management. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2019-06-24 13:50:45 +00:00
{
clk: Use generic CCF ops where possible This converts most CCF drivers to use generic ops. imx6q is the only outlier, where we retain the existing functionality by moving the check to request(). Signed-off-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com> Reviewed-by: Peng Fan <peng.fan@nxp.com> Link: https://lore.kernel.org/r/20220320203446.740178-2-seanga2@gmail.com [ fixed missing include for at91 ] Signed-off-by: Sean Anderson <seanga2@gmail.com>
2022-03-20 20:34:46 +00:00
if (clk->id < IMX6QDL_CLK_DUMMY || clk->id >= IMX6QDL_CLK_END) {
printf("%s: Invalid clk ID #%lu\n", __func__, clk->id);
clk: Port Linux common clock framework [CCF] for imx6q to U-boot (tag: v5.1.12) This patch brings the files from Linux kernel (linux-stable/linux-5.1.y SHA1: 5752b50477da)to provide clocks support as it is used on the Linux kernel with Common Clock Framework [CCF] setup. The directory structure has been preserved. The ported code only supports reading information from PLL, MUX, Divider, etc and enabling/disabling the clocks USDHCx/ECSPIx depending on used bus. Moreover, it is agnostic to the alias numbering as the information about the clock is read from the device tree. One needs to pay attention to the comments indicating necessary for U-Boot's driver model changes. If needed, the code can be extended to support the "set" part of the clock management. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2019-06-24 13:50:45 +00:00
return -EINVAL;
}
return 0;
}
static struct clk_ops imx6q_clk_ops = {
clk: Use generic CCF ops where possible This converts most CCF drivers to use generic ops. imx6q is the only outlier, where we retain the existing functionality by moving the check to request(). Signed-off-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com> Reviewed-by: Peng Fan <peng.fan@nxp.com> Link: https://lore.kernel.org/r/20220320203446.740178-2-seanga2@gmail.com [ fixed missing include for at91 ] Signed-off-by: Sean Anderson <seanga2@gmail.com>
2022-03-20 20:34:46 +00:00
.request = imx6q_clk_request,
.set_rate = ccf_clk_set_rate,
.get_rate = ccf_clk_get_rate,
.enable = ccf_clk_enable,
.disable = ccf_clk_disable,
clk: Port Linux common clock framework [CCF] for imx6q to U-boot (tag: v5.1.12) This patch brings the files from Linux kernel (linux-stable/linux-5.1.y SHA1: 5752b50477da)to provide clocks support as it is used on the Linux kernel with Common Clock Framework [CCF] setup. The directory structure has been preserved. The ported code only supports reading information from PLL, MUX, Divider, etc and enabling/disabling the clocks USDHCx/ECSPIx depending on used bus. Moreover, it is agnostic to the alias numbering as the information about the clock is read from the device tree. One needs to pay attention to the comments indicating necessary for U-Boot's driver model changes. If needed, the code can be extended to support the "set" part of the clock management. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2019-06-24 13:50:45 +00:00
};
static const char *const usdhc_sels[] = { "pll2_pfd2_396m", "pll2_pfd0_352m", };
clk: Add support for I2C clocks on NXP's imx6q SoC which use CCF This change adds support for I2C clock modeled in CCF. This code intention is to only enable those clocks in the I2C driver with default settings. For that reason the "busy" versions of clocks reuse the generic approach and would need to be updated when one wants to adjust the I2C clock frequency in U-Boot. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2019-10-15 10:44:57 +00:00
static const char *const periph_sels[] = { "periph_pre", "periph_clk2", };
static const char *const periph_pre_sels[] = { "pll2_bus", "pll2_pfd2_396m",
"pll2_pfd0_352m", "pll2_198m", };
clk: Port Linux common clock framework [CCF] for imx6q to U-boot (tag: v5.1.12) This patch brings the files from Linux kernel (linux-stable/linux-5.1.y SHA1: 5752b50477da)to provide clocks support as it is used on the Linux kernel with Common Clock Framework [CCF] setup. The directory structure has been preserved. The ported code only supports reading information from PLL, MUX, Divider, etc and enabling/disabling the clocks USDHCx/ECSPIx depending on used bus. Moreover, it is agnostic to the alias numbering as the information about the clock is read from the device tree. One needs to pay attention to the comments indicating necessary for U-Boot's driver model changes. If needed, the code can be extended to support the "set" part of the clock management. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2019-06-24 13:50:45 +00:00
static int imx6q_clk_probe(struct udevice *dev)
{
void *base;
/* Anatop clocks */
base = (void *)ANATOP_BASE_ADDR;
clk_dm(IMX6QDL_CLK_PLL2,
imx_clk_pllv3(IMX_PLLV3_GENERIC, "pll2_bus", "osc",
base + 0x30, 0x1));
clk_dm(IMX6QDL_CLK_PLL3_USB_OTG,
imx_clk_pllv3(IMX_PLLV3_USB, "pll3_usb_otg", "osc",
base + 0x10, 0x3));
clk_dm(IMX6QDL_CLK_PLL3_60M,
imx_clk_fixed_factor("pll3_60m", "pll3_usb_otg", 1, 8));
clk_dm(IMX6QDL_CLK_PLL2_PFD0_352M,
imx_clk_pfd("pll2_pfd0_352m", "pll2_bus", base + 0x100, 0));
clk_dm(IMX6QDL_CLK_PLL2_PFD2_396M,
imx_clk_pfd("pll2_pfd2_396m", "pll2_bus", base + 0x100, 2));
clk: imx6: Add definition for IMX6QDL_CLK_ENET_REF clock After commit 673f6597321d ("net: fec_mxc: support i.MX8M with CLK_CCF") all NXP boards, which are not IMX8 and in the same time are supporting CCF need to provide PTP clock. On the i.MX6Q this clock is provided with IMX6QDL_CLK_ENET_REF in the Linux kernel's CCF. Code in this change models the simplest case when enet reference clock is generated from 'osc' clock. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2020-02-24 13:55:26 +00:00
clk_dm(IMX6QDL_CLK_PLL6,
imx_clk_pllv3(IMX_PLLV3_ENET, "pll6", "osc", base + 0xe0, 0x3));
clk_dm(IMX6QDL_CLK_PLL6_ENET,
imx_clk_gate("pll6_enet", "pll6", base + 0xe0, 13));
clk: Port Linux common clock framework [CCF] for imx6q to U-boot (tag: v5.1.12) This patch brings the files from Linux kernel (linux-stable/linux-5.1.y SHA1: 5752b50477da)to provide clocks support as it is used on the Linux kernel with Common Clock Framework [CCF] setup. The directory structure has been preserved. The ported code only supports reading information from PLL, MUX, Divider, etc and enabling/disabling the clocks USDHCx/ECSPIx depending on used bus. Moreover, it is agnostic to the alias numbering as the information about the clock is read from the device tree. One needs to pay attention to the comments indicating necessary for U-Boot's driver model changes. If needed, the code can be extended to support the "set" part of the clock management. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2019-06-24 13:50:45 +00:00
/* CCM clocks */
base = dev_read_addr_ptr(dev);
clk: Fix error checking of dev_read_addr_ptr dev_read_addr_ptr returns NULL on error, not FDT_ADDR_T_NONE. Signed-off-by: Sean Anderson <seanga2@gmail.com>
2019-12-25 04:57:47 +00:00
if (!base)
clk: Port Linux common clock framework [CCF] for imx6q to U-boot (tag: v5.1.12) This patch brings the files from Linux kernel (linux-stable/linux-5.1.y SHA1: 5752b50477da)to provide clocks support as it is used on the Linux kernel with Common Clock Framework [CCF] setup. The directory structure has been preserved. The ported code only supports reading information from PLL, MUX, Divider, etc and enabling/disabling the clocks USDHCx/ECSPIx depending on used bus. Moreover, it is agnostic to the alias numbering as the information about the clock is read from the device tree. One needs to pay attention to the comments indicating necessary for U-Boot's driver model changes. If needed, the code can be extended to support the "set" part of the clock management. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2019-06-24 13:50:45 +00:00
return -EINVAL;
clk_dm(IMX6QDL_CLK_USDHC1_SEL,
imx_clk_mux("usdhc1_sel", base + 0x1c, 16, 1,
usdhc_sels, ARRAY_SIZE(usdhc_sels)));
clk_dm(IMX6QDL_CLK_USDHC2_SEL,
imx_clk_mux("usdhc2_sel", base + 0x1c, 17, 1,
usdhc_sels, ARRAY_SIZE(usdhc_sels)));
clk_dm(IMX6QDL_CLK_USDHC3_SEL,
imx_clk_mux("usdhc3_sel", base + 0x1c, 18, 1,
usdhc_sels, ARRAY_SIZE(usdhc_sels)));
clk_dm(IMX6QDL_CLK_USDHC4_SEL,
imx_clk_mux("usdhc4_sel", base + 0x1c, 19, 1,
usdhc_sels, ARRAY_SIZE(usdhc_sels)));
clk_dm(IMX6QDL_CLK_USDHC1_PODF,
imx_clk_divider("usdhc1_podf", "usdhc1_sel",
base + 0x24, 11, 3));
clk_dm(IMX6QDL_CLK_USDHC2_PODF,
imx_clk_divider("usdhc2_podf", "usdhc2_sel",
base + 0x24, 16, 3));
clk_dm(IMX6QDL_CLK_USDHC3_PODF,
imx_clk_divider("usdhc3_podf", "usdhc3_sel",
base + 0x24, 19, 3));
clk_dm(IMX6QDL_CLK_USDHC4_PODF,
imx_clk_divider("usdhc4_podf", "usdhc4_sel",
base + 0x24, 22, 3));
clk_dm(IMX6QDL_CLK_ECSPI_ROOT,
imx_clk_divider("ecspi_root", "pll3_60m", base + 0x38, 19, 6));
clk_dm(IMX6QDL_CLK_ECSPI1,
imx_clk_gate2("ecspi1", "ecspi_root", base + 0x6c, 0));
clk_dm(IMX6QDL_CLK_ECSPI2,
imx_clk_gate2("ecspi2", "ecspi_root", base + 0x6c, 2));
clk_dm(IMX6QDL_CLK_ECSPI3,
imx_clk_gate2("ecspi3", "ecspi_root", base + 0x6c, 4));
clk_dm(IMX6QDL_CLK_ECSPI4,
imx_clk_gate2("ecspi4", "ecspi_root", base + 0x6c, 6));
clk_dm(IMX6QDL_CLK_USDHC1,
imx_clk_gate2("usdhc1", "usdhc1_podf", base + 0x80, 2));
clk_dm(IMX6QDL_CLK_USDHC2,
imx_clk_gate2("usdhc2", "usdhc2_podf", base + 0x80, 4));
clk_dm(IMX6QDL_CLK_USDHC3,
imx_clk_gate2("usdhc3", "usdhc3_podf", base + 0x80, 6));
clk_dm(IMX6QDL_CLK_USDHC4,
imx_clk_gate2("usdhc4", "usdhc4_podf", base + 0x80, 8));
clk: Add support for I2C clocks on NXP's imx6q SoC which use CCF This change adds support for I2C clock modeled in CCF. This code intention is to only enable those clocks in the I2C driver with default settings. For that reason the "busy" versions of clocks reuse the generic approach and would need to be updated when one wants to adjust the I2C clock frequency in U-Boot. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2019-10-15 10:44:57 +00:00
clk_dm(IMX6QDL_CLK_PERIPH_PRE,
imx_clk_mux("periph_pre", base + 0x18, 18, 2, periph_pre_sels,
ARRAY_SIZE(periph_pre_sels)));
clk_dm(IMX6QDL_CLK_PERIPH,
imx_clk_busy_mux("periph", base + 0x14, 25, 1, base + 0x48,
5, periph_sels, ARRAY_SIZE(periph_sels)));
clk_dm(IMX6QDL_CLK_AHB,
imx_clk_busy_divider("ahb", "periph", base + 0x14, 10, 3,
base + 0x48, 1));
clk_dm(IMX6QDL_CLK_IPG,
imx_clk_divider("ipg", "ahb", base + 0x14, 8, 2));
clk_dm(IMX6QDL_CLK_IPG_PER,
imx_clk_divider("ipg_per", "ipg", base + 0x1c, 0, 6));
clk_dm(IMX6QDL_CLK_I2C1,
imx_clk_gate2("i2c1", "ipg_per", base + 0x70, 6));
clk_dm(IMX6QDL_CLK_I2C2,
imx_clk_gate2("i2c2", "ipg_per", base + 0x70, 8));
clk: imx6: Add definition for IMX6QDL_CLK_ENET clock After commit 673f6597321d ("net: fec_mxc: support i.MX8M with CLK_CCF") all NXP boards, which are not IMX8 and in the same time are supporting CCF need to provide IMX6QDL_CLK_ENET. This change defines the missing clock in i.MX6Q's CCF. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2020-02-24 13:55:24 +00:00
clk_dm(IMX6QDL_CLK_ENET, imx_clk_gate2("enet", "ipg", base + 0x6c, 10));
clk: imx6: Add definition for IMX6QDL_CLK_ENET_REF clock After commit 673f6597321d ("net: fec_mxc: support i.MX8M with CLK_CCF") all NXP boards, which are not IMX8 and in the same time are supporting CCF need to provide PTP clock. On the i.MX6Q this clock is provided with IMX6QDL_CLK_ENET_REF in the Linux kernel's CCF. Code in this change models the simplest case when enet reference clock is generated from 'osc' clock. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2020-02-24 13:55:26 +00:00
clk_dm(IMX6QDL_CLK_ENET_REF,
imx_clk_fixed_factor("enet_ref", "pll6_enet", 1, 1));
clk: Port Linux common clock framework [CCF] for imx6q to U-boot (tag: v5.1.12) This patch brings the files from Linux kernel (linux-stable/linux-5.1.y SHA1: 5752b50477da)to provide clocks support as it is used on the Linux kernel with Common Clock Framework [CCF] setup. The directory structure has been preserved. The ported code only supports reading information from PLL, MUX, Divider, etc and enabling/disabling the clocks USDHCx/ECSPIx depending on used bus. Moreover, it is agnostic to the alias numbering as the information about the clock is read from the device tree. One needs to pay attention to the comments indicating necessary for U-Boot's driver model changes. If needed, the code can be extended to support the "set" part of the clock management. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2019-06-24 13:50:45 +00:00
return 0;
}
static const struct udevice_id imx6q_clk_ids[] = {
{ .compatible = "fsl,imx6q-ccm" },
{ },
};
U_BOOT_DRIVER(imx6q_clk) = {
.name = "clk_imx6q",
.id = UCLASS_CLK,
.of_match = imx6q_clk_ids,
.ops = &imx6q_clk_ops,
.probe = imx6q_clk_probe,
.flags = DM_FLAG_PRE_RELOC,
};
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