![Linus Torvalds](/assets/img/avatar_default.png)
then a bunch of driver updates and a handful of new drivers. In terms of diffstat the Qualcomm and Amlogic drivers are high up there because of all the clk data introcued by new drivers. The Nvidia Tegra driver had a lot of work done this cycle too to support suspend/resume and memory controllers. And the OMAP clk driver got proper clk and reset handling in place. Rounding out the patches are various updates to remove unused data, mark things static, correct incorrect data in drivers, etc. All the little things that improve drivers and maintain code health. I will point out that there's a patch in here for the GPIO clk driver, that almost nobody uses, which changes behavior and causes clk_set_rate() to try to change the GPIO gate clk's parent. Other than that things are fairly well SoC specific here. Core: - Add a clk provider API to get current parent index - Plug a memory leak in clk_unregister() path New Drivers: - CGU in Ingenix X1000 - Bitmain BM1880 clks - Qualcomm MSM8998 GPU clk controllers - Qualcomm SC7180 GCC and RPMH clk controllers - Qualcomm QCS404 Q6SSTOP clk controllers - Add support for the Renesas R-Car M3-W+ (r8a77961) SoC - Add support for the Renesas RZ/G2N (r8a774b1) SoC - Add Tegra20/30 External Memory Clock (EMC) support Updates: - Make gpio gate clks propagate rate setting up to parent - Prepare Armada 3700 for suspend to RAM by moving PCIe suspend/resume priority - Drop unused variables, enums, etc. in various clk drivers - Convert various drivers to use devm_platform_ioremap_resource() - Use struct_size() some more in various clk drivers - Improve Rockchip px30 clk tree - Add suspend/resume support to Tegra210 clk driver - Reimplement SOR clks on earlier Tegra SoCs, helping HDMI and DP - Allwinner DT exports and H6 clk tree fixes - Proper clk and reset handling for OMAP SoCs - Revamped TI divider clk to clamp max divider - Make 1443X/1416X PLL clock structure common for reusing among i.MX8 SoCs - Drop IMX7ULP_CLK_MIPI_PLL clock, it shouldn't be used - Add VIDEO2_PLL clock for imx8mq - Add missing gate clock for pll1/2 fixed dividers on i.MX8 SoCs - Add sm1 support in the Amlogic audio clock controller - Switch some clocks on R-Car Gen2/3 to .determine_rate() - Remove Renesas R-Car Gen2 legacy DT clock support - Improve arithmetic divisions on Renesas R-Car Gen2 and Gen3 - Improve Renesas R-Car Gen3 SD clock handling - Add rate table for Samsung exynos542x GPU and VPLL clks - Fix potential CPU performance degradation after system suspend/resume cycle on exynos542x SoCs -----BEGIN PGP SIGNATURE----- iQJFBAABCAAvFiEE9L57QeeUxqYDyoaDrQKIl8bklSUFAl3e6rMRHHNib3lkQGtl cm5lbC5vcmcACgkQrQKIl8bklSUtWQ//a3epm5t5lQHZjhDJFLYXqavzkGTLcDnF 2+HWNwxLGatvmFqvLAxpB9QlFUntLOdQwjsI47UGKLVNwtXzqafl2yQGrMNYsdR+ 6ka0zkytPRuRr+C6cUYUxaoLviDMKi/PXrluOawXbdQ1ZL/5TgURkmEgGglp4Mti QHp2HO7uSk9pYA8T3TUK+hd9cqLXqW4xMn8MohuWfF3JxoquixOg+N7pE/OeGUyW NueWWvwKJ86Gtx+OxY8bW3afAzstUynxCUDLC/t7a5y52jxGCwuhHTC/pNcDgYFC z1H0rnoKG3pE74mm11Mh//zneoqvyzrWYGU6TNcaTxVgODogklGYY6doRLelZ0qc 4HFSqrtkUtx+lI++9Q73LcX5xdogTGxOnNv/hr3rCCR/w9tFmys14JKnfUDQCbhj qRTFlr9IkIkhfCiRw5+zNo0oRf/hE7IOgYdU2ju31j4w/V5r8TUKPTq2VBh2sJaG MJKQclaIBJOV5sxgJrI/XoocTes7H3WR0w5rSB1askbhzQnKkrhctPOEB6Rkvtyv 27z5VZb1AmPdYaa6TtHVZ5SQOB3Y9JaEl6t89X61kxk7mgylZlwhASUuBVRZpz53 WIjNfquYGpWnA+vc+SWnlMnaymqtlatGig8k8atdDn+eMiXphktL+gObIF1OFnm1 AhGhUxXf/Aw= =qJNg -----END PGP SIGNATURE----- Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux Pull clk updates from Stephen Boyd: "This merge window we have one small clk provider API in the core framework and then a bunch of driver updates and a handful of new drivers. In terms of diffstat the Qualcomm and Amlogic drivers are high up there because of all the clk data introcued by new drivers. The Nvidia Tegra driver had a lot of work done this cycle too to support suspend/resume and memory controllers. And the OMAP clk driver got proper clk and reset handling in place. Rounding out the patches are various updates to remove unused data, mark things static, correct incorrect data in drivers, etc. All the little things that improve drivers and maintain code health. I will point out that there's a patch in here for the GPIO clk driver, that almost nobody uses, which changes behavior and causes clk_set_rate() to try to change the GPIO gate clk's parent. Other than that things are fairly well SoC specific here. Core: - Add a clk provider API to get current parent index - Plug a memory leak in clk_unregister() path New Drivers: - CGU in Ingenix X1000 - Bitmain BM1880 clks - Qualcomm MSM8998 GPU clk controllers - Qualcomm SC7180 GCC and RPMH clk controllers - Qualcomm QCS404 Q6SSTOP clk controllers - Add support for the Renesas R-Car M3-W+ (r8a77961) SoC - Add support for the Renesas RZ/G2N (r8a774b1) SoC - Add Tegra20/30 External Memory Clock (EMC) support Updates: - Make gpio gate clks propagate rate setting up to parent - Prepare Armada 3700 for suspend to RAM by moving PCIe suspend/resume priority - Drop unused variables, enums, etc. in various clk drivers - Convert various drivers to use devm_platform_ioremap_resource() - Use struct_size() some more in various clk drivers - Improve Rockchip px30 clk tree - Add suspend/resume support to Tegra210 clk driver - Reimplement SOR clks on earlier Tegra SoCs, helping HDMI and DP - Allwinner DT exports and H6 clk tree fixes - Proper clk and reset handling for OMAP SoCs - Revamped TI divider clk to clamp max divider - Make 1443X/1416X PLL clock structure common for reusing among i.MX8 SoCs - Drop IMX7ULP_CLK_MIPI_PLL clock, it shouldn't be used - Add VIDEO2_PLL clock for imx8mq - Add missing gate clock for pll1/2 fixed dividers on i.MX8 SoCs - Add sm1 support in the Amlogic audio clock controller - Switch some clocks on R-Car Gen2/3 to .determine_rate() - Remove Renesas R-Car Gen2 legacy DT clock support - Improve arithmetic divisions on Renesas R-Car Gen2 and Gen3 - Improve Renesas R-Car Gen3 SD clock handling - Add rate table for Samsung exynos542x GPU and VPLL clks - Fix potential CPU performance degradation after system suspend/resume cycle on exynos542x SoCs" * tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (160 commits) clk: aspeed: Add RMII RCLK gates for both AST2500 MACs MAINTAINERS: Add entry for BM1880 SoC clock driver clk: Add common clock driver for BM1880 SoC dt-bindings: clock: Add devicetree binding for BM1880 SoC clk: Add clk_hw_unregister_composite helper function definition clk: Zero init clk_init_data in helpers clk: ingenic: Allow drivers to be built with COMPILE_TEST MAINTAINERS: Update section for Ux500 clock drivers clk: mark clk_disable_unused() as __init clk: Fix memory leak in clk_unregister() clk: Ingenic: Add CGU driver for X1000. dt-bindings: clock: Add X1000 bindings. clk: tegra: Use match_string() helper to simplify the code clk: pxa: fix one of the pxa RTC clocks clk: sprd: Use IS_ERR() to validate the return value of syscon_regmap_lookup_by_phandle() clk: armada-xp: remove unused code clk: tegra: Fix build error without CONFIG_PM_SLEEP clk: tegra: Add missing stubs for the case of !CONFIG_PM_SLEEP clk: tegra: Optimize PLLX restore on Tegra20/30 clk: tegra: Add suspend and resume support on Tegra210 ...
749 lines
22 KiB
C
749 lines
22 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
// Copyright IBM Corp
|
|
// Copyright ASPEED Technology
|
|
|
|
#define pr_fmt(fmt) "clk-ast2600: " fmt
|
|
|
|
#include <linux/mfd/syscon.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <dt-bindings/clock/ast2600-clock.h>
|
|
|
|
#include "clk-aspeed.h"
|
|
|
|
#define ASPEED_G6_NUM_CLKS 71
|
|
|
|
#define ASPEED_G6_SILICON_REV 0x004
|
|
|
|
#define ASPEED_G6_RESET_CTRL 0x040
|
|
#define ASPEED_G6_RESET_CTRL2 0x050
|
|
|
|
#define ASPEED_G6_CLK_STOP_CTRL 0x080
|
|
#define ASPEED_G6_CLK_STOP_CTRL2 0x090
|
|
|
|
#define ASPEED_G6_MISC_CTRL 0x0C0
|
|
#define UART_DIV13_EN BIT(12)
|
|
|
|
#define ASPEED_G6_CLK_SELECTION1 0x300
|
|
#define ASPEED_G6_CLK_SELECTION2 0x304
|
|
#define ASPEED_G6_CLK_SELECTION4 0x310
|
|
|
|
#define ASPEED_HPLL_PARAM 0x200
|
|
#define ASPEED_APLL_PARAM 0x210
|
|
#define ASPEED_MPLL_PARAM 0x220
|
|
#define ASPEED_EPLL_PARAM 0x240
|
|
#define ASPEED_DPLL_PARAM 0x260
|
|
|
|
#define ASPEED_G6_STRAP1 0x500
|
|
|
|
#define ASPEED_MAC12_CLK_DLY 0x340
|
|
#define ASPEED_MAC34_CLK_DLY 0x350
|
|
|
|
/* Globally visible clocks */
|
|
static DEFINE_SPINLOCK(aspeed_g6_clk_lock);
|
|
|
|
/* Keeps track of all clocks */
|
|
static struct clk_hw_onecell_data *aspeed_g6_clk_data;
|
|
|
|
static void __iomem *scu_g6_base;
|
|
|
|
/*
|
|
* Clocks marked with CLK_IS_CRITICAL:
|
|
*
|
|
* ref0 and ref1 are essential for the SoC to operate
|
|
* mpll is required if SDRAM is used
|
|
*/
|
|
static const struct aspeed_gate_data aspeed_g6_gates[] = {
|
|
/* clk rst name parent flags */
|
|
[ASPEED_CLK_GATE_MCLK] = { 0, -1, "mclk-gate", "mpll", CLK_IS_CRITICAL }, /* SDRAM */
|
|
[ASPEED_CLK_GATE_ECLK] = { 1, -1, "eclk-gate", "eclk", 0 }, /* Video Engine */
|
|
[ASPEED_CLK_GATE_GCLK] = { 2, 7, "gclk-gate", NULL, 0 }, /* 2D engine */
|
|
/* vclk parent - dclk/d1clk/hclk/mclk */
|
|
[ASPEED_CLK_GATE_VCLK] = { 3, 6, "vclk-gate", NULL, 0 }, /* Video Capture */
|
|
[ASPEED_CLK_GATE_BCLK] = { 4, 8, "bclk-gate", "bclk", 0 }, /* PCIe/PCI */
|
|
/* From dpll */
|
|
[ASPEED_CLK_GATE_DCLK] = { 5, -1, "dclk-gate", NULL, CLK_IS_CRITICAL }, /* DAC */
|
|
[ASPEED_CLK_GATE_REF0CLK] = { 6, -1, "ref0clk-gate", "clkin", CLK_IS_CRITICAL },
|
|
[ASPEED_CLK_GATE_USBPORT2CLK] = { 7, 3, "usb-port2-gate", NULL, 0 }, /* USB2.0 Host port 2 */
|
|
/* Reserved 8 */
|
|
[ASPEED_CLK_GATE_USBUHCICLK] = { 9, 15, "usb-uhci-gate", NULL, 0 }, /* USB1.1 (requires port 2 enabled) */
|
|
/* From dpll/epll/40mhz usb p1 phy/gpioc6/dp phy pll */
|
|
[ASPEED_CLK_GATE_D1CLK] = { 10, 13, "d1clk-gate", "d1clk", 0 }, /* GFX CRT */
|
|
/* Reserved 11/12 */
|
|
[ASPEED_CLK_GATE_YCLK] = { 13, 4, "yclk-gate", NULL, 0 }, /* HAC */
|
|
[ASPEED_CLK_GATE_USBPORT1CLK] = { 14, 14, "usb-port1-gate", NULL, 0 }, /* USB2 hub/USB2 host port 1/USB1.1 dev */
|
|
[ASPEED_CLK_GATE_UART5CLK] = { 15, -1, "uart5clk-gate", "uart", 0 }, /* UART5 */
|
|
/* Reserved 16/19 */
|
|
[ASPEED_CLK_GATE_MAC1CLK] = { 20, 11, "mac1clk-gate", "mac12", 0 }, /* MAC1 */
|
|
[ASPEED_CLK_GATE_MAC2CLK] = { 21, 12, "mac2clk-gate", "mac12", 0 }, /* MAC2 */
|
|
/* Reserved 22/23 */
|
|
[ASPEED_CLK_GATE_RSACLK] = { 24, 4, "rsaclk-gate", NULL, 0 }, /* HAC */
|
|
[ASPEED_CLK_GATE_RVASCLK] = { 25, 9, "rvasclk-gate", NULL, 0 }, /* RVAS */
|
|
/* Reserved 26 */
|
|
[ASPEED_CLK_GATE_EMMCCLK] = { 27, 16, "emmcclk-gate", NULL, 0 }, /* For card clk */
|
|
/* Reserved 28/29/30 */
|
|
[ASPEED_CLK_GATE_LCLK] = { 32, 32, "lclk-gate", NULL, 0 }, /* LPC */
|
|
[ASPEED_CLK_GATE_ESPICLK] = { 33, -1, "espiclk-gate", NULL, 0 }, /* eSPI */
|
|
[ASPEED_CLK_GATE_REF1CLK] = { 34, -1, "ref1clk-gate", "clkin", CLK_IS_CRITICAL },
|
|
/* Reserved 35 */
|
|
[ASPEED_CLK_GATE_SDCLK] = { 36, 56, "sdclk-gate", NULL, 0 }, /* SDIO/SD */
|
|
[ASPEED_CLK_GATE_LHCCLK] = { 37, -1, "lhclk-gate", "lhclk", 0 }, /* LPC master/LPC+ */
|
|
/* Reserved 38 RSA: no longer used */
|
|
/* Reserved 39 */
|
|
[ASPEED_CLK_GATE_I3C0CLK] = { 40, 40, "i3c0clk-gate", NULL, 0 }, /* I3C0 */
|
|
[ASPEED_CLK_GATE_I3C1CLK] = { 41, 41, "i3c1clk-gate", NULL, 0 }, /* I3C1 */
|
|
[ASPEED_CLK_GATE_I3C2CLK] = { 42, 42, "i3c2clk-gate", NULL, 0 }, /* I3C2 */
|
|
[ASPEED_CLK_GATE_I3C3CLK] = { 43, 43, "i3c3clk-gate", NULL, 0 }, /* I3C3 */
|
|
[ASPEED_CLK_GATE_I3C4CLK] = { 44, 44, "i3c4clk-gate", NULL, 0 }, /* I3C4 */
|
|
[ASPEED_CLK_GATE_I3C5CLK] = { 45, 45, "i3c5clk-gate", NULL, 0 }, /* I3C5 */
|
|
[ASPEED_CLK_GATE_I3C6CLK] = { 46, 46, "i3c6clk-gate", NULL, 0 }, /* I3C6 */
|
|
[ASPEED_CLK_GATE_I3C7CLK] = { 47, 47, "i3c7clk-gate", NULL, 0 }, /* I3C7 */
|
|
[ASPEED_CLK_GATE_UART1CLK] = { 48, -1, "uart1clk-gate", "uart", 0 }, /* UART1 */
|
|
[ASPEED_CLK_GATE_UART2CLK] = { 49, -1, "uart2clk-gate", "uart", 0 }, /* UART2 */
|
|
[ASPEED_CLK_GATE_UART3CLK] = { 50, -1, "uart3clk-gate", "uart", 0 }, /* UART3 */
|
|
[ASPEED_CLK_GATE_UART4CLK] = { 51, -1, "uart4clk-gate", "uart", 0 }, /* UART4 */
|
|
[ASPEED_CLK_GATE_MAC3CLK] = { 52, 52, "mac3clk-gate", "mac34", 0 }, /* MAC3 */
|
|
[ASPEED_CLK_GATE_MAC4CLK] = { 53, 53, "mac4clk-gate", "mac34", 0 }, /* MAC4 */
|
|
[ASPEED_CLK_GATE_UART6CLK] = { 54, -1, "uart6clk-gate", "uartx", 0 }, /* UART6 */
|
|
[ASPEED_CLK_GATE_UART7CLK] = { 55, -1, "uart7clk-gate", "uartx", 0 }, /* UART7 */
|
|
[ASPEED_CLK_GATE_UART8CLK] = { 56, -1, "uart8clk-gate", "uartx", 0 }, /* UART8 */
|
|
[ASPEED_CLK_GATE_UART9CLK] = { 57, -1, "uart9clk-gate", "uartx", 0 }, /* UART9 */
|
|
[ASPEED_CLK_GATE_UART10CLK] = { 58, -1, "uart10clk-gate", "uartx", 0 }, /* UART10 */
|
|
[ASPEED_CLK_GATE_UART11CLK] = { 59, -1, "uart11clk-gate", "uartx", 0 }, /* UART11 */
|
|
[ASPEED_CLK_GATE_UART12CLK] = { 60, -1, "uart12clk-gate", "uartx", 0 }, /* UART12 */
|
|
[ASPEED_CLK_GATE_UART13CLK] = { 61, -1, "uart13clk-gate", "uartx", 0 }, /* UART13 */
|
|
[ASPEED_CLK_GATE_FSICLK] = { 62, 59, "fsiclk-gate", NULL, 0 }, /* FSI */
|
|
};
|
|
|
|
static const struct clk_div_table ast2600_eclk_div_table[] = {
|
|
{ 0x0, 2 },
|
|
{ 0x1, 2 },
|
|
{ 0x2, 3 },
|
|
{ 0x3, 4 },
|
|
{ 0x4, 5 },
|
|
{ 0x5, 6 },
|
|
{ 0x6, 7 },
|
|
{ 0x7, 8 },
|
|
{ 0 }
|
|
};
|
|
|
|
static const struct clk_div_table ast2600_mac_div_table[] = {
|
|
{ 0x0, 4 },
|
|
{ 0x1, 4 },
|
|
{ 0x2, 6 },
|
|
{ 0x3, 8 },
|
|
{ 0x4, 10 },
|
|
{ 0x5, 12 },
|
|
{ 0x6, 14 },
|
|
{ 0x7, 16 },
|
|
{ 0 }
|
|
};
|
|
|
|
static const struct clk_div_table ast2600_div_table[] = {
|
|
{ 0x0, 4 },
|
|
{ 0x1, 8 },
|
|
{ 0x2, 12 },
|
|
{ 0x3, 16 },
|
|
{ 0x4, 20 },
|
|
{ 0x5, 24 },
|
|
{ 0x6, 28 },
|
|
{ 0x7, 32 },
|
|
{ 0 }
|
|
};
|
|
|
|
/* For hpll/dpll/epll/mpll */
|
|
static struct clk_hw *ast2600_calc_pll(const char *name, u32 val)
|
|
{
|
|
unsigned int mult, div;
|
|
|
|
if (val & BIT(24)) {
|
|
/* Pass through mode */
|
|
mult = div = 1;
|
|
} else {
|
|
/* F = 25Mhz * [(M + 2) / (n + 1)] / (p + 1) */
|
|
u32 m = val & 0x1fff;
|
|
u32 n = (val >> 13) & 0x3f;
|
|
u32 p = (val >> 19) & 0xf;
|
|
mult = (m + 1) / (n + 1);
|
|
div = (p + 1);
|
|
}
|
|
return clk_hw_register_fixed_factor(NULL, name, "clkin", 0,
|
|
mult, div);
|
|
};
|
|
|
|
static struct clk_hw *ast2600_calc_apll(const char *name, u32 val)
|
|
{
|
|
unsigned int mult, div;
|
|
|
|
if (val & BIT(20)) {
|
|
/* Pass through mode */
|
|
mult = div = 1;
|
|
} else {
|
|
/* F = 25Mhz * (2-od) * [(m + 2) / (n + 1)] */
|
|
u32 m = (val >> 5) & 0x3f;
|
|
u32 od = (val >> 4) & 0x1;
|
|
u32 n = val & 0xf;
|
|
|
|
mult = (2 - od) * (m + 2);
|
|
div = n + 1;
|
|
}
|
|
return clk_hw_register_fixed_factor(NULL, name, "clkin", 0,
|
|
mult, div);
|
|
};
|
|
|
|
static u32 get_bit(u8 idx)
|
|
{
|
|
return BIT(idx % 32);
|
|
}
|
|
|
|
static u32 get_reset_reg(struct aspeed_clk_gate *gate)
|
|
{
|
|
if (gate->reset_idx < 32)
|
|
return ASPEED_G6_RESET_CTRL;
|
|
|
|
return ASPEED_G6_RESET_CTRL2;
|
|
}
|
|
|
|
static u32 get_clock_reg(struct aspeed_clk_gate *gate)
|
|
{
|
|
if (gate->clock_idx < 32)
|
|
return ASPEED_G6_CLK_STOP_CTRL;
|
|
|
|
return ASPEED_G6_CLK_STOP_CTRL2;
|
|
}
|
|
|
|
static int aspeed_g6_clk_is_enabled(struct clk_hw *hw)
|
|
{
|
|
struct aspeed_clk_gate *gate = to_aspeed_clk_gate(hw);
|
|
u32 clk = get_bit(gate->clock_idx);
|
|
u32 rst = get_bit(gate->reset_idx);
|
|
u32 reg;
|
|
u32 enval;
|
|
|
|
/*
|
|
* If the IP is in reset, treat the clock as not enabled,
|
|
* this happens with some clocks such as the USB one when
|
|
* coming from cold reset. Without this, aspeed_clk_enable()
|
|
* will fail to lift the reset.
|
|
*/
|
|
if (gate->reset_idx >= 0) {
|
|
regmap_read(gate->map, get_reset_reg(gate), ®);
|
|
|
|
if (reg & rst)
|
|
return 0;
|
|
}
|
|
|
|
regmap_read(gate->map, get_clock_reg(gate), ®);
|
|
|
|
enval = (gate->flags & CLK_GATE_SET_TO_DISABLE) ? 0 : clk;
|
|
|
|
return ((reg & clk) == enval) ? 1 : 0;
|
|
}
|
|
|
|
static int aspeed_g6_clk_enable(struct clk_hw *hw)
|
|
{
|
|
struct aspeed_clk_gate *gate = to_aspeed_clk_gate(hw);
|
|
unsigned long flags;
|
|
u32 clk = get_bit(gate->clock_idx);
|
|
u32 rst = get_bit(gate->reset_idx);
|
|
|
|
spin_lock_irqsave(gate->lock, flags);
|
|
|
|
if (aspeed_g6_clk_is_enabled(hw)) {
|
|
spin_unlock_irqrestore(gate->lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
if (gate->reset_idx >= 0) {
|
|
/* Put IP in reset */
|
|
regmap_write(gate->map, get_reset_reg(gate), rst);
|
|
/* Delay 100us */
|
|
udelay(100);
|
|
}
|
|
|
|
/* Enable clock */
|
|
if (gate->flags & CLK_GATE_SET_TO_DISABLE) {
|
|
/* Clock is clear to enable, so use set to clear register */
|
|
regmap_write(gate->map, get_clock_reg(gate) + 0x04, clk);
|
|
} else {
|
|
/* Clock is set to enable, so use write to set register */
|
|
regmap_write(gate->map, get_clock_reg(gate), clk);
|
|
}
|
|
|
|
if (gate->reset_idx >= 0) {
|
|
/* A delay of 10ms is specified by the ASPEED docs */
|
|
mdelay(10);
|
|
/* Take IP out of reset */
|
|
regmap_write(gate->map, get_reset_reg(gate) + 0x4, rst);
|
|
}
|
|
|
|
spin_unlock_irqrestore(gate->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void aspeed_g6_clk_disable(struct clk_hw *hw)
|
|
{
|
|
struct aspeed_clk_gate *gate = to_aspeed_clk_gate(hw);
|
|
unsigned long flags;
|
|
u32 clk = get_bit(gate->clock_idx);
|
|
|
|
spin_lock_irqsave(gate->lock, flags);
|
|
|
|
if (gate->flags & CLK_GATE_SET_TO_DISABLE) {
|
|
regmap_write(gate->map, get_clock_reg(gate), clk);
|
|
} else {
|
|
/* Use set to clear register */
|
|
regmap_write(gate->map, get_clock_reg(gate) + 0x4, clk);
|
|
}
|
|
|
|
spin_unlock_irqrestore(gate->lock, flags);
|
|
}
|
|
|
|
static const struct clk_ops aspeed_g6_clk_gate_ops = {
|
|
.enable = aspeed_g6_clk_enable,
|
|
.disable = aspeed_g6_clk_disable,
|
|
.is_enabled = aspeed_g6_clk_is_enabled,
|
|
};
|
|
|
|
static int aspeed_g6_reset_deassert(struct reset_controller_dev *rcdev,
|
|
unsigned long id)
|
|
{
|
|
struct aspeed_reset *ar = to_aspeed_reset(rcdev);
|
|
u32 rst = get_bit(id);
|
|
u32 reg = id >= 32 ? ASPEED_G6_RESET_CTRL2 : ASPEED_G6_RESET_CTRL;
|
|
|
|
/* Use set to clear register */
|
|
return regmap_write(ar->map, reg + 0x04, rst);
|
|
}
|
|
|
|
static int aspeed_g6_reset_assert(struct reset_controller_dev *rcdev,
|
|
unsigned long id)
|
|
{
|
|
struct aspeed_reset *ar = to_aspeed_reset(rcdev);
|
|
u32 rst = get_bit(id);
|
|
u32 reg = id >= 32 ? ASPEED_G6_RESET_CTRL2 : ASPEED_G6_RESET_CTRL;
|
|
|
|
return regmap_write(ar->map, reg, rst);
|
|
}
|
|
|
|
static int aspeed_g6_reset_status(struct reset_controller_dev *rcdev,
|
|
unsigned long id)
|
|
{
|
|
struct aspeed_reset *ar = to_aspeed_reset(rcdev);
|
|
int ret;
|
|
u32 val;
|
|
u32 rst = get_bit(id);
|
|
u32 reg = id >= 32 ? ASPEED_G6_RESET_CTRL2 : ASPEED_G6_RESET_CTRL;
|
|
|
|
ret = regmap_read(ar->map, reg, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return !!(val & rst);
|
|
}
|
|
|
|
static const struct reset_control_ops aspeed_g6_reset_ops = {
|
|
.assert = aspeed_g6_reset_assert,
|
|
.deassert = aspeed_g6_reset_deassert,
|
|
.status = aspeed_g6_reset_status,
|
|
};
|
|
|
|
static struct clk_hw *aspeed_g6_clk_hw_register_gate(struct device *dev,
|
|
const char *name, const char *parent_name, unsigned long flags,
|
|
struct regmap *map, u8 clock_idx, u8 reset_idx,
|
|
u8 clk_gate_flags, spinlock_t *lock)
|
|
{
|
|
struct aspeed_clk_gate *gate;
|
|
struct clk_init_data init;
|
|
struct clk_hw *hw;
|
|
int ret;
|
|
|
|
gate = kzalloc(sizeof(*gate), GFP_KERNEL);
|
|
if (!gate)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
init.name = name;
|
|
init.ops = &aspeed_g6_clk_gate_ops;
|
|
init.flags = flags;
|
|
init.parent_names = parent_name ? &parent_name : NULL;
|
|
init.num_parents = parent_name ? 1 : 0;
|
|
|
|
gate->map = map;
|
|
gate->clock_idx = clock_idx;
|
|
gate->reset_idx = reset_idx;
|
|
gate->flags = clk_gate_flags;
|
|
gate->lock = lock;
|
|
gate->hw.init = &init;
|
|
|
|
hw = &gate->hw;
|
|
ret = clk_hw_register(dev, hw);
|
|
if (ret) {
|
|
kfree(gate);
|
|
hw = ERR_PTR(ret);
|
|
}
|
|
|
|
return hw;
|
|
}
|
|
|
|
static const char * const vclk_parent_names[] = {
|
|
"dpll",
|
|
"d1pll",
|
|
"hclk",
|
|
"mclk",
|
|
};
|
|
|
|
static const char * const d1clk_parent_names[] = {
|
|
"dpll",
|
|
"epll",
|
|
"usb-phy-40m",
|
|
"gpioc6_clkin",
|
|
"dp_phy_pll",
|
|
};
|
|
|
|
static int aspeed_g6_clk_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct aspeed_reset *ar;
|
|
struct regmap *map;
|
|
struct clk_hw *hw;
|
|
u32 val, rate;
|
|
int i, ret;
|
|
|
|
map = syscon_node_to_regmap(dev->of_node);
|
|
if (IS_ERR(map)) {
|
|
dev_err(dev, "no syscon regmap\n");
|
|
return PTR_ERR(map);
|
|
}
|
|
|
|
ar = devm_kzalloc(dev, sizeof(*ar), GFP_KERNEL);
|
|
if (!ar)
|
|
return -ENOMEM;
|
|
|
|
ar->map = map;
|
|
|
|
ar->rcdev.owner = THIS_MODULE;
|
|
ar->rcdev.nr_resets = 64;
|
|
ar->rcdev.ops = &aspeed_g6_reset_ops;
|
|
ar->rcdev.of_node = dev->of_node;
|
|
|
|
ret = devm_reset_controller_register(dev, &ar->rcdev);
|
|
if (ret) {
|
|
dev_err(dev, "could not register reset controller\n");
|
|
return ret;
|
|
}
|
|
|
|
/* UART clock div13 setting */
|
|
regmap_read(map, ASPEED_G6_MISC_CTRL, &val);
|
|
if (val & UART_DIV13_EN)
|
|
rate = 24000000 / 13;
|
|
else
|
|
rate = 24000000;
|
|
hw = clk_hw_register_fixed_rate(dev, "uart", NULL, 0, rate);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_UART] = hw;
|
|
|
|
/* UART6~13 clock div13 setting */
|
|
regmap_read(map, 0x80, &val);
|
|
if (val & BIT(31))
|
|
rate = 24000000 / 13;
|
|
else
|
|
rate = 24000000;
|
|
hw = clk_hw_register_fixed_rate(dev, "uartx", NULL, 0, rate);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_UARTX] = hw;
|
|
|
|
/* EMMC ext clock divider */
|
|
hw = clk_hw_register_gate(dev, "emmc_extclk_gate", "hpll", 0,
|
|
scu_g6_base + ASPEED_G6_CLK_SELECTION1, 15, 0,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
hw = clk_hw_register_divider_table(dev, "emmc_extclk", "emmc_extclk_gate", 0,
|
|
scu_g6_base + ASPEED_G6_CLK_SELECTION1, 12, 3, 0,
|
|
ast2600_div_table,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_EMMC] = hw;
|
|
|
|
/* SD/SDIO clock divider and gate */
|
|
hw = clk_hw_register_gate(dev, "sd_extclk_gate", "hpll", 0,
|
|
scu_g6_base + ASPEED_G6_CLK_SELECTION4, 31, 0,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
hw = clk_hw_register_divider_table(dev, "sd_extclk", "sd_extclk_gate",
|
|
0, scu_g6_base + ASPEED_G6_CLK_SELECTION4, 28, 3, 0,
|
|
ast2600_div_table,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_SDIO] = hw;
|
|
|
|
/* MAC1/2 RMII 50MHz RCLK */
|
|
hw = clk_hw_register_fixed_rate(dev, "mac12rclk", "hpll", 0, 50000000);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
|
|
/* MAC1/2 AHB bus clock divider */
|
|
hw = clk_hw_register_divider_table(dev, "mac12", "hpll", 0,
|
|
scu_g6_base + ASPEED_G6_CLK_SELECTION1, 16, 3, 0,
|
|
ast2600_mac_div_table,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_MAC12] = hw;
|
|
|
|
/* RMII1 50MHz (RCLK) output enable */
|
|
hw = clk_hw_register_gate(dev, "mac1rclk", "mac12rclk", 0,
|
|
scu_g6_base + ASPEED_MAC12_CLK_DLY, 29, 0,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_MAC1RCLK] = hw;
|
|
|
|
/* RMII2 50MHz (RCLK) output enable */
|
|
hw = clk_hw_register_gate(dev, "mac2rclk", "mac12rclk", 0,
|
|
scu_g6_base + ASPEED_MAC12_CLK_DLY, 30, 0,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_MAC2RCLK] = hw;
|
|
|
|
/* MAC1/2 RMII 50MHz RCLK */
|
|
hw = clk_hw_register_fixed_rate(dev, "mac34rclk", "hclk", 0, 50000000);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
|
|
/* MAC3/4 AHB bus clock divider */
|
|
hw = clk_hw_register_divider_table(dev, "mac34", "hpll", 0,
|
|
scu_g6_base + 0x310, 24, 3, 0,
|
|
ast2600_mac_div_table,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_MAC34] = hw;
|
|
|
|
/* RMII3 50MHz (RCLK) output enable */
|
|
hw = clk_hw_register_gate(dev, "mac3rclk", "mac34rclk", 0,
|
|
scu_g6_base + ASPEED_MAC34_CLK_DLY, 29, 0,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_MAC3RCLK] = hw;
|
|
|
|
/* RMII4 50MHz (RCLK) output enable */
|
|
hw = clk_hw_register_gate(dev, "mac4rclk", "mac34rclk", 0,
|
|
scu_g6_base + ASPEED_MAC34_CLK_DLY, 30, 0,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_MAC4RCLK] = hw;
|
|
|
|
/* LPC Host (LHCLK) clock divider */
|
|
hw = clk_hw_register_divider_table(dev, "lhclk", "hpll", 0,
|
|
scu_g6_base + ASPEED_G6_CLK_SELECTION1, 20, 3, 0,
|
|
ast2600_div_table,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_LHCLK] = hw;
|
|
|
|
/* gfx d1clk : use dp clk */
|
|
regmap_update_bits(map, ASPEED_G6_CLK_SELECTION1, GENMASK(10, 8), BIT(10));
|
|
/* SoC Display clock selection */
|
|
hw = clk_hw_register_mux(dev, "d1clk", d1clk_parent_names,
|
|
ARRAY_SIZE(d1clk_parent_names), 0,
|
|
scu_g6_base + ASPEED_G6_CLK_SELECTION1, 8, 3, 0,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_D1CLK] = hw;
|
|
|
|
/* d1 clk div 0x308[17:15] x [14:12] - 8,7,6,5,4,3,2,1 */
|
|
regmap_write(map, 0x308, 0x12000); /* 3x3 = 9 */
|
|
|
|
/* P-Bus (BCLK) clock divider */
|
|
hw = clk_hw_register_divider_table(dev, "bclk", "hpll", 0,
|
|
scu_g6_base + ASPEED_G6_CLK_SELECTION1, 20, 3, 0,
|
|
ast2600_div_table,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_BCLK] = hw;
|
|
|
|
/* Video Capture clock selection */
|
|
hw = clk_hw_register_mux(dev, "vclk", vclk_parent_names,
|
|
ARRAY_SIZE(vclk_parent_names), 0,
|
|
scu_g6_base + ASPEED_G6_CLK_SELECTION2, 12, 3, 0,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_VCLK] = hw;
|
|
|
|
/* Video Engine clock divider */
|
|
hw = clk_hw_register_divider_table(dev, "eclk", NULL, 0,
|
|
scu_g6_base + ASPEED_G6_CLK_SELECTION1, 28, 3, 0,
|
|
ast2600_eclk_div_table,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_ECLK] = hw;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(aspeed_g6_gates); i++) {
|
|
const struct aspeed_gate_data *gd = &aspeed_g6_gates[i];
|
|
u32 gate_flags;
|
|
|
|
/*
|
|
* Special case: the USB port 1 clock (bit 14) is always
|
|
* working the opposite way from the other ones.
|
|
*/
|
|
gate_flags = (gd->clock_idx == 14) ? 0 : CLK_GATE_SET_TO_DISABLE;
|
|
hw = aspeed_g6_clk_hw_register_gate(dev,
|
|
gd->name,
|
|
gd->parent_name,
|
|
gd->flags,
|
|
map,
|
|
gd->clock_idx,
|
|
gd->reset_idx,
|
|
gate_flags,
|
|
&aspeed_g6_clk_lock);
|
|
if (IS_ERR(hw))
|
|
return PTR_ERR(hw);
|
|
aspeed_g6_clk_data->hws[i] = hw;
|
|
}
|
|
|
|
return 0;
|
|
};
|
|
|
|
static const struct of_device_id aspeed_g6_clk_dt_ids[] = {
|
|
{ .compatible = "aspeed,ast2600-scu" },
|
|
{ }
|
|
};
|
|
|
|
static struct platform_driver aspeed_g6_clk_driver = {
|
|
.probe = aspeed_g6_clk_probe,
|
|
.driver = {
|
|
.name = "ast2600-clk",
|
|
.of_match_table = aspeed_g6_clk_dt_ids,
|
|
.suppress_bind_attrs = true,
|
|
},
|
|
};
|
|
builtin_platform_driver(aspeed_g6_clk_driver);
|
|
|
|
static const u32 ast2600_a0_axi_ahb_div_table[] = {
|
|
2, 2, 3, 5,
|
|
};
|
|
|
|
static const u32 ast2600_a1_axi_ahb_div_table[] = {
|
|
4, 6, 2, 4,
|
|
};
|
|
|
|
static void __init aspeed_g6_cc(struct regmap *map)
|
|
{
|
|
struct clk_hw *hw;
|
|
u32 val, div, chip_id, axi_div, ahb_div;
|
|
|
|
clk_hw_register_fixed_rate(NULL, "clkin", NULL, 0, 25000000);
|
|
|
|
/*
|
|
* High-speed PLL clock derived from the crystal. This the CPU clock,
|
|
* and we assume that it is enabled
|
|
*/
|
|
regmap_read(map, ASPEED_HPLL_PARAM, &val);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_HPLL] = ast2600_calc_pll("hpll", val);
|
|
|
|
regmap_read(map, ASPEED_MPLL_PARAM, &val);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_MPLL] = ast2600_calc_pll("mpll", val);
|
|
|
|
regmap_read(map, ASPEED_DPLL_PARAM, &val);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_DPLL] = ast2600_calc_pll("dpll", val);
|
|
|
|
regmap_read(map, ASPEED_EPLL_PARAM, &val);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_EPLL] = ast2600_calc_pll("epll", val);
|
|
|
|
regmap_read(map, ASPEED_APLL_PARAM, &val);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_APLL] = ast2600_calc_apll("apll", val);
|
|
|
|
/* Strap bits 12:11 define the AXI/AHB clock frequency ratio (aka HCLK)*/
|
|
regmap_read(map, ASPEED_G6_STRAP1, &val);
|
|
if (val & BIT(16))
|
|
axi_div = 1;
|
|
else
|
|
axi_div = 2;
|
|
|
|
regmap_read(map, ASPEED_G6_SILICON_REV, &chip_id);
|
|
if (chip_id & BIT(16))
|
|
ahb_div = ast2600_a1_axi_ahb_div_table[(val >> 11) & 0x3];
|
|
else
|
|
ahb_div = ast2600_a0_axi_ahb_div_table[(val >> 11) & 0x3];
|
|
|
|
hw = clk_hw_register_fixed_factor(NULL, "ahb", "hpll", 0, 1, axi_div * ahb_div);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_AHB] = hw;
|
|
|
|
regmap_read(map, ASPEED_G6_CLK_SELECTION1, &val);
|
|
val = (val >> 23) & 0x7;
|
|
div = 4 * (val + 1);
|
|
hw = clk_hw_register_fixed_factor(NULL, "apb1", "hpll", 0, 1, div);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_APB1] = hw;
|
|
|
|
regmap_read(map, ASPEED_G6_CLK_SELECTION4, &val);
|
|
val = (val >> 9) & 0x7;
|
|
div = 2 * (val + 1);
|
|
hw = clk_hw_register_fixed_factor(NULL, "apb2", "ahb", 0, 1, div);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_APB2] = hw;
|
|
|
|
/* USB 2.0 port1 phy 40MHz clock */
|
|
hw = clk_hw_register_fixed_rate(NULL, "usb-phy-40m", NULL, 0, 40000000);
|
|
aspeed_g6_clk_data->hws[ASPEED_CLK_USBPHY_40M] = hw;
|
|
};
|
|
|
|
static void __init aspeed_g6_cc_init(struct device_node *np)
|
|
{
|
|
struct regmap *map;
|
|
int ret;
|
|
int i;
|
|
|
|
scu_g6_base = of_iomap(np, 0);
|
|
if (!scu_g6_base)
|
|
return;
|
|
|
|
aspeed_g6_clk_data = kzalloc(struct_size(aspeed_g6_clk_data, hws,
|
|
ASPEED_G6_NUM_CLKS), GFP_KERNEL);
|
|
if (!aspeed_g6_clk_data)
|
|
return;
|
|
|
|
/*
|
|
* This way all clocks fetched before the platform device probes,
|
|
* except those we assign here for early use, will be deferred.
|
|
*/
|
|
for (i = 0; i < ASPEED_G6_NUM_CLKS; i++)
|
|
aspeed_g6_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER);
|
|
|
|
/*
|
|
* We check that the regmap works on this very first access,
|
|
* but as this is an MMIO-backed regmap, subsequent regmap
|
|
* access is not going to fail and we skip error checks from
|
|
* this point.
|
|
*/
|
|
map = syscon_node_to_regmap(np);
|
|
if (IS_ERR(map)) {
|
|
pr_err("no syscon regmap\n");
|
|
return;
|
|
}
|
|
|
|
aspeed_g6_cc(map);
|
|
aspeed_g6_clk_data->num = ASPEED_G6_NUM_CLKS;
|
|
ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, aspeed_g6_clk_data);
|
|
if (ret)
|
|
pr_err("failed to add DT provider: %d\n", ret);
|
|
};
|
|
CLK_OF_DECLARE_DRIVER(aspeed_cc_g6, "aspeed,ast2600-scu", aspeed_g6_cc_init);
|