drivers/clk/davinci/psc-da850.c
Source file repositories/reference/linux-study-clean/drivers/clk/davinci/psc-da850.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/clk/davinci/psc-da850.c- Extension
.c- Size
- 5568 bytes
- Lines
- 149
- Domain
- Driver Families
- Bucket
- drivers/clk
- Inferred role
- Driver Families: implementation source
- Status
- source implementation candidate
Why This File Exists
Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/clk-provider.hlinux/clk.hlinux/clkdev.hlinux/init.hlinux/kernel.hlinux/of.hlinux/types.hpsc.h
Detected Declarations
function da850_psc0_initfunction of_da850_psc0_initfunction da850_psc1_initfunction of_da850_psc1_init
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0
/*
* PSC clock descriptions for TI DA850/OMAP-L138/AM18XX
*
* Copyright (C) 2018 David Lechner <david@lechnology.com>
*/
#include <linux/clk-provider.h>
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/types.h>
#include "psc.h"
LPSC_CLKDEV1(emifa_clkdev, NULL, "ti-aemif");
LPSC_CLKDEV1(spi0_clkdev, NULL, "spi_davinci.0");
LPSC_CLKDEV1(mmcsd0_clkdev, NULL, "da830-mmc.0");
LPSC_CLKDEV1(uart0_clkdev, NULL, "serial8250.0");
/* REVISIT: used dev_id instead of con_id */
LPSC_CLKDEV1(arm_clkdev, "arm", NULL);
LPSC_CLKDEV1(dsp_clkdev, NULL, "davinci-rproc.0");
static const struct davinci_lpsc_clk_info da850_psc0_info[] = {
LPSC(0, 0, tpcc0, pll0_sysclk2, NULL, LPSC_ALWAYS_ENABLED),
LPSC(1, 0, tptc0, pll0_sysclk2, NULL, LPSC_ALWAYS_ENABLED),
LPSC(2, 0, tptc1, pll0_sysclk2, NULL, LPSC_ALWAYS_ENABLED),
LPSC(3, 0, emifa, async1, emifa_clkdev, 0),
LPSC(4, 0, spi0, pll0_sysclk2, spi0_clkdev, 0),
LPSC(5, 0, mmcsd0, pll0_sysclk2, mmcsd0_clkdev, 0),
LPSC(6, 0, aintc, pll0_sysclk4, NULL, LPSC_ALWAYS_ENABLED),
LPSC(7, 0, arm_rom, pll0_sysclk2, NULL, LPSC_ALWAYS_ENABLED),
LPSC(9, 0, uart0, pll0_sysclk2, uart0_clkdev, 0),
LPSC(13, 0, pruss, pll0_sysclk2, NULL, 0),
LPSC(14, 0, arm, pll0_sysclk6, arm_clkdev, LPSC_ALWAYS_ENABLED | LPSC_SET_RATE_PARENT),
LPSC(15, 1, dsp, pll0_sysclk1, dsp_clkdev, LPSC_FORCE | LPSC_LOCAL_RESET),
{ }
};
LPSC_CLKDEV3(usb0_clkdev, "fck", "da830-usb-phy-clks",
NULL, "musb-da8xx",
NULL, "cppi41-dmaengine");
LPSC_CLKDEV1(usb1_clkdev, NULL, "ohci-da8xx");
/* REVISIT: gpio-davinci.c should be modified to drop con_id */
LPSC_CLKDEV1(gpio_clkdev, "gpio", NULL);
LPSC_CLKDEV2(emac_clkdev, NULL, "davinci_emac.1",
"fck", "davinci_mdio.0");
LPSC_CLKDEV1(mcasp0_clkdev, NULL, "davinci-mcasp.0");
LPSC_CLKDEV1(sata_clkdev, "fck", "ahci_da850");
LPSC_CLKDEV1(vpif_clkdev, NULL, "vpif");
LPSC_CLKDEV1(spi1_clkdev, NULL, "spi_davinci.1");
LPSC_CLKDEV1(i2c1_clkdev, NULL, "i2c_davinci.2");
LPSC_CLKDEV1(uart1_clkdev, NULL, "serial8250.1");
LPSC_CLKDEV1(uart2_clkdev, NULL, "serial8250.2");
LPSC_CLKDEV1(mcbsp0_clkdev, NULL, "davinci-mcbsp.0");
LPSC_CLKDEV1(mcbsp1_clkdev, NULL, "davinci-mcbsp.1");
LPSC_CLKDEV1(lcdc_clkdev, "fck", "da8xx_lcdc.0");
LPSC_CLKDEV3(ehrpwm_clkdev, "fck", "ehrpwm.0",
"fck", "ehrpwm.1",
NULL, "da830-tbclksync");
LPSC_CLKDEV1(mmcsd1_clkdev, NULL, "da830-mmc.1");
LPSC_CLKDEV3(ecap_clkdev, "fck", "ecap.0",
"fck", "ecap.1",
"fck", "ecap.2");
static int da850_psc0_init(struct device *dev, void __iomem *base)
{
return davinci_psc_register_clocks(dev, da850_psc0_info, 16, base);
}
static int of_da850_psc0_init(struct device *dev, void __iomem *base)
{
return of_davinci_psc_clk_init(dev, da850_psc0_info, 16, base);
}
static struct clk_bulk_data da850_psc0_parent_clks[] = {
{ .id = "pll0_sysclk1" },
{ .id = "pll0_sysclk2" },
{ .id = "pll0_sysclk4" },
{ .id = "pll0_sysclk6" },
{ .id = "async1" },
};
const struct davinci_psc_init_data da850_psc0_init_data = {
.parent_clks = da850_psc0_parent_clks,
.num_parent_clks = ARRAY_SIZE(da850_psc0_parent_clks),
.psc_init = &da850_psc0_init,
};
Annotation
- Immediate include surface: `linux/clk-provider.h`, `linux/clk.h`, `linux/clkdev.h`, `linux/init.h`, `linux/kernel.h`, `linux/of.h`, `linux/types.h`, `psc.h`.
- Detected declarations: `function da850_psc0_init`, `function of_da850_psc0_init`, `function da850_psc1_init`, `function of_da850_psc1_init`.
- Atlas domain: Driver Families / drivers/clk.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.