* [PATCH v2 3/3] clk: add support for siflower sf21-topcrm
2026-05-24 13:13 [PATCH v2 0/3] clk: add Siflower SF21 topcrm support Chuanhong Guo
2026-05-24 13:13 ` [PATCH v2 1/3] riscv: add Siflower RISC-V SoC family Kconfig support Chuanhong Guo
2026-05-24 13:13 ` [PATCH v2 2/3] dt-bindings: clock: add header/doc for Siflower sf21-topcrm Chuanhong Guo
@ 2026-05-24 13:13 ` Chuanhong Guo
2026-05-24 14:02 ` sashiko-bot
2 siblings, 1 reply; 5+ messages in thread
From: Chuanhong Guo @ 2026-05-24 13:13 UTC (permalink / raw)
To: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Michael Turquette, Stephen Boyd, Brian Masney, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Philipp Zabel, Yao Zi
Cc: linux-riscv, linux-kernel, linux-clk, devicetree, Chuanhong Guo
This commit adds a driver for the Toplevel clock and reset controller
found on Siflower SF21A6826/SF21H8898 SoCs.
This block contains control for 3 PLLs, several clock mux/gate/divider
blocks, and a reset register for on-chip peripherals.
There are also two registers for enabling PCIe clock output in this
block. They aren't covered by this patch because I can't test those
without a PCIe driver. These will be added with the PCIe driver
patchset later after I get that working.
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
---
drivers/clk/Kconfig | 1 +
drivers/clk/Makefile | 1 +
drivers/clk/siflower/Kconfig | 23 +
drivers/clk/siflower/Makefile | 1 +
drivers/clk/siflower/clk-sf21-topcrm.c | 1017 ++++++++++++++++++++++++++++++++
5 files changed, 1043 insertions(+)
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 1717ce75a907..0fb6a69bb329 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -529,6 +529,7 @@ source "drivers/clk/renesas/Kconfig"
source "drivers/clk/rockchip/Kconfig"
source "drivers/clk/samsung/Kconfig"
source "drivers/clk/sifive/Kconfig"
+source "drivers/clk/siflower/Kconfig"
source "drivers/clk/socfpga/Kconfig"
source "drivers/clk/sophgo/Kconfig"
source "drivers/clk/spacemit/Kconfig"
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index cc108a75a900..8ac25e6694a7 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -145,6 +145,7 @@ obj-y += renesas/
obj-$(CONFIG_COMMON_CLK_ROCKCHIP) += rockchip/
obj-$(CONFIG_COMMON_CLK_SAMSUNG) += samsung/
obj-$(CONFIG_CLK_SIFIVE) += sifive/
+obj-$(CONFIG_CLK_SIFLOWER) += siflower/
obj-y += socfpga/
obj-y += sophgo/
obj-y += spacemit/
diff --git a/drivers/clk/siflower/Kconfig b/drivers/clk/siflower/Kconfig
new file mode 100644
index 000000000000..25e94828360b
--- /dev/null
+++ b/drivers/clk/siflower/Kconfig
@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: GPL-2.0
+
+menuconfig CLK_SIFLOWER
+ bool "Clock driver for Siflower SoCs"
+ depends on ARCH_SIFLOWER || COMPILE_TEST
+ default ARCH_SIFLOWER
+ help
+ Clock drivers for Siflower Linux-capable SoCs.
+
+if CLK_SIFLOWER
+
+config CLK_SF21_TOPCRM
+ tristate "Clock driver for Siflower SF21 toplevel clock & reset module"
+ depends on ARCH_SIFLOWER || COMPILE_TEST
+ default ARCH_SIFLOWER
+ select RESET_CONTROLLER
+ select RATIONAL
+ help
+ Supports the toplevel clock and reset module in Siflower SF21 SoCs.
+ If this kernel is meant to run on Siflower SF21A6826 or SF21H8898,
+ enable this driver.
+
+endif
diff --git a/drivers/clk/siflower/Makefile b/drivers/clk/siflower/Makefile
new file mode 100644
index 000000000000..952a470a4308
--- /dev/null
+++ b/drivers/clk/siflower/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_CLK_SF21_TOPCRM) += clk-sf21-topcrm.o
diff --git a/drivers/clk/siflower/clk-sf21-topcrm.c b/drivers/clk/siflower/clk-sf21-topcrm.c
new file mode 100644
index 000000000000..ad96a2ff97ac
--- /dev/null
+++ b/drivers/clk/siflower/clk-sf21-topcrm.c
@@ -0,0 +1,1017 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <dt-bindings/clock/siflower,sf21-topcrm.h>
+#include <dt-bindings/reset/siflower,sf21-topcrm.h>
+#include <linux/bitfield.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/rational.h>
+#include <linux/reset-controller.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+struct sf_clk_common {
+ void __iomem *base;
+ /* Serializes register RMW sequences by clock ops. */
+ raw_spinlock_t *lock;
+ struct clk_hw hw;
+};
+
+static const struct clk_parent_data sf21_ref_parent[] = {
+ { .index = 0 },
+};
+
+static inline struct sf_clk_common *hw_to_sf_clk_common(struct clk_hw *hw)
+{
+ return container_of(hw, struct sf_clk_common, hw);
+}
+
+static inline u32 sf_readl(struct sf_clk_common *priv, u32 reg)
+{
+ return readl(priv->base + reg);
+}
+
+static inline void sf_writel(struct sf_clk_common *priv, u32 reg, u32 val)
+{
+ return writel(val, priv->base + reg);
+}
+
+static inline void sf_rmw(struct sf_clk_common *priv, u32 reg, u32 clr, u32 set)
+{
+ u32 val;
+
+ val = sf_readl(priv, reg);
+ val &= ~clr;
+ val |= set;
+ sf_writel(priv, reg, val);
+}
+
+struct sf_dual_divider {
+ struct sf_clk_common common;
+ u8 div_reg;
+ u8 div1_offs;
+ u8 div2_offs;
+ u8 en_reg;
+ u8 en_bit;
+ u16 load_reg;
+ u8 load_bit;
+ u8 flags;
+};
+
+#define SF_DUAL_DIVIDER_DIV_MASK GENMASK(2, 0)
+#define SF_DUAL_DIVIDER_START_FROM_1 BIT(0)
+
+static unsigned long sf21_dualdiv_round_rate(unsigned long rate,
+ unsigned long parent_rate,
+ unsigned int max_div,
+ unsigned int *diva,
+ unsigned int *divb)
+{
+ unsigned int div = DIV_ROUND_CLOSEST(parent_rate, rate);
+ unsigned int best_diff, da, db, cur_div, cur_diff;
+
+ if (div <= 1) {
+ *diva = 1;
+ *divb = 1;
+ return parent_rate;
+ }
+
+ best_diff = div - 1;
+ *diva = 1;
+ *divb = 1;
+
+ for (da = 1; da <= max_div; da++) {
+ db = DIV_ROUND_CLOSEST(div, da);
+ if (db > da)
+ db = da;
+
+ cur_div = da * db;
+ if (div > cur_div)
+ cur_diff = div - cur_div;
+ else
+ cur_diff = cur_div - div;
+
+ if (cur_diff < best_diff) {
+ best_diff = cur_diff;
+ *diva = da;
+ *divb = db;
+ }
+ if (cur_diff == 0)
+ break;
+ }
+
+ return parent_rate / *diva / *divb;
+}
+
+static unsigned int sf21_dual_divider_max(struct sf_dual_divider *priv)
+{
+ return FIELD_MAX(SF_DUAL_DIVIDER_DIV_MASK) +
+ !!(priv->flags & SF_DUAL_DIVIDER_START_FROM_1);
+}
+
+static int sf21_dual_divider_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ struct sf_dual_divider *priv =
+ container_of(hw, struct sf_dual_divider, common.hw);
+ unsigned int diva, divb;
+
+ if (!req->rate)
+ return -EINVAL;
+
+ req->rate = sf21_dualdiv_round_rate(req->rate, req->best_parent_rate,
+ sf21_dual_divider_max(priv),
+ &diva, &divb);
+
+ return 0;
+}
+
+static int sf21_dual_divider_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct sf_dual_divider *priv =
+ container_of(hw, struct sf_dual_divider, common.hw);
+ struct sf_clk_common *cmn = hw_to_sf_clk_common(hw);
+ unsigned int div1, div2;
+
+ if (!rate)
+ return -EINVAL;
+
+ sf21_dualdiv_round_rate(rate, parent_rate, sf21_dual_divider_max(priv),
+ &div1, &div2);
+
+ if (priv->flags & SF_DUAL_DIVIDER_START_FROM_1) {
+ div1--;
+ div2--;
+ }
+
+ guard(raw_spinlock_irqsave)(cmn->lock);
+ sf_rmw(cmn, priv->div_reg,
+ (SF_DUAL_DIVIDER_DIV_MASK << priv->div1_offs) |
+ (SF_DUAL_DIVIDER_DIV_MASK << priv->div2_offs),
+ (div1 << priv->div1_offs) | (div2 << priv->div2_offs));
+ sf_writel(cmn, priv->load_reg, BIT(priv->load_bit));
+ sf_writel(cmn, priv->load_reg, 0);
+ return 0;
+}
+
+static unsigned long sf21_dual_divider_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct sf_dual_divider *priv =
+ container_of(hw, struct sf_dual_divider, common.hw);
+ struct sf_clk_common *cmn = hw_to_sf_clk_common(hw);
+ u32 cfg = sf_readl(cmn, priv->div_reg);
+ unsigned long div1 = (cfg >> priv->div1_offs) &
+ SF_DUAL_DIVIDER_DIV_MASK;
+ unsigned long div2 = (cfg >> priv->div2_offs) &
+ SF_DUAL_DIVIDER_DIV_MASK;
+
+ if (priv->flags & SF_DUAL_DIVIDER_START_FROM_1) {
+ div1++;
+ div2++;
+ } else if (!div1 || !div2) {
+ return 0;
+ }
+
+ return parent_rate / div1 / div2;
+}
+
+static int sf21_dual_divider_enable(struct clk_hw *hw)
+{
+ struct sf_dual_divider *priv =
+ container_of(hw, struct sf_dual_divider, common.hw);
+ struct sf_clk_common *cmn = hw_to_sf_clk_common(hw);
+
+ guard(raw_spinlock_irqsave)(priv->common.lock);
+ sf_rmw(cmn, priv->en_reg, 0, BIT(priv->en_bit));
+ sf_writel(cmn, priv->load_reg, BIT(priv->load_bit));
+ sf_writel(cmn, priv->load_reg, 0);
+ return 0;
+}
+
+static void sf21_dual_divider_disable(struct clk_hw *hw)
+{
+ struct sf_dual_divider *priv =
+ container_of(hw, struct sf_dual_divider, common.hw);
+ struct sf_clk_common *cmn = hw_to_sf_clk_common(hw);
+
+ guard(raw_spinlock_irqsave)(priv->common.lock);
+ sf_rmw(cmn, priv->en_reg, BIT(priv->en_bit), 0);
+ sf_writel(cmn, priv->load_reg, BIT(priv->load_bit));
+ sf_writel(cmn, priv->load_reg, 0);
+}
+
+static int sf21_dual_divider_is_enabled(struct clk_hw *hw)
+{
+ struct sf_dual_divider *priv =
+ container_of(hw, struct sf_dual_divider, common.hw);
+ struct sf_clk_common *cmn = hw_to_sf_clk_common(hw);
+
+ return sf_readl(cmn, priv->en_reg) & BIT(priv->en_bit) ? 1 : 0;
+}
+
+#define PLL_CMN_CFG1 0x0
+#define PLL_CMN_BYPASS BIT(27)
+#define PLL_CMN_PD BIT(26)
+#define PLL_CMN_FBDIV GENMASK(25, 14)
+#define PLL_CMN_POSTDIV_PD 13
+#define PLL_CMN_VCO_PD BIT(12)
+#define PLL_CMN_POSTDIV1_OFFS 9
+#define PLL_CMN_POSTDIV2_OFFS 6
+#define PLL_CMN_REFDIV GENMASK(5, 0)
+
+#define PLL_CMN_LOCK 0xc8
+#define PLL_DDR_LOCK 0xcc
+#define PLL_PCIE_LOCK 0xd4
+
+#define CFG_LOAD 0x100
+#define CFG_LOAD_PCIE_PLL_BIT 4
+#define CFG_LOAD_DDR_PLL_BIT 2
+#define CFG_LOAD_CMN_PLL_BIT 1
+#define CFG_LOAD_DIV_BIT 0
+
+#define PLL_LOCK_TIMEOUT_US 1000
+
+static unsigned long sf21_cmnpll_vco_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct sf_clk_common *priv = hw_to_sf_clk_common(hw);
+ u32 cfg = sf_readl(priv, PLL_CMN_CFG1);
+ unsigned long refdiv = FIELD_GET(PLL_CMN_REFDIV, cfg);
+ unsigned long fbdiv = FIELD_GET(PLL_CMN_FBDIV, cfg);
+
+ if (!refdiv || !fbdiv)
+ return 0;
+
+ return div_u64((u64)parent_rate * fbdiv, refdiv);
+}
+
+static int sf21_cmnpll_vco_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ unsigned long fbdiv, refdiv;
+
+ rational_best_approximation(req->rate, req->best_parent_rate,
+ FIELD_MAX(PLL_CMN_FBDIV),
+ FIELD_MAX(PLL_CMN_REFDIV), &fbdiv, &refdiv);
+ if (!refdiv || !fbdiv)
+ return -EINVAL;
+
+ req->rate = div_u64((u64)req->best_parent_rate * fbdiv, refdiv);
+
+ return 0;
+}
+
+static int sf21_cmnpll_vco_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct sf_clk_common *priv = hw_to_sf_clk_common(hw);
+ unsigned long fbdiv, refdiv;
+ u32 val;
+
+ rational_best_approximation(rate, parent_rate, FIELD_MAX(PLL_CMN_FBDIV),
+ FIELD_MAX(PLL_CMN_REFDIV), &fbdiv, &refdiv);
+ if (!refdiv || !fbdiv)
+ return -EINVAL;
+
+ guard(raw_spinlock_irqsave)(priv->lock);
+
+ sf_rmw(priv, PLL_CMN_CFG1, PLL_CMN_REFDIV | PLL_CMN_FBDIV | PLL_CMN_PD,
+ FIELD_PREP(PLL_CMN_REFDIV, refdiv) |
+ FIELD_PREP(PLL_CMN_FBDIV, fbdiv));
+ sf_writel(priv, CFG_LOAD, BIT(CFG_LOAD_CMN_PLL_BIT));
+ sf_writel(priv, CFG_LOAD, 0);
+
+ return readl_poll_timeout_atomic(priv->base + PLL_CMN_LOCK, val, val & 1,
+ 0, PLL_LOCK_TIMEOUT_US);
+}
+
+static const struct clk_ops sf21_cmnpll_vco_ops = {
+ .recalc_rate = sf21_cmnpll_vco_recalc_rate,
+ .determine_rate = sf21_cmnpll_vco_determine_rate,
+ .set_rate = sf21_cmnpll_vco_set_rate,
+};
+
+static struct sf_clk_common cmnpll_vco = {
+ .hw.init = CLK_HW_INIT_PARENTS_DATA("cmnpll_vco", sf21_ref_parent,
+ &sf21_cmnpll_vco_ops, 0),
+};
+
+static const struct clk_ops sf21_cmnpll_postdiv_ops = {
+ .recalc_rate = sf21_dual_divider_recalc_rate,
+ .determine_rate = sf21_dual_divider_determine_rate,
+ .set_rate = sf21_dual_divider_set_rate,
+};
+
+static struct sf_dual_divider cmnpll_postdiv = {
+ .common.hw.init = CLK_HW_INIT_HW("cmnpll_postdiv", &cmnpll_vco.hw,
+ &sf21_cmnpll_postdiv_ops, 0),
+ .div_reg = PLL_CMN_CFG1,
+ .div1_offs = PLL_CMN_POSTDIV1_OFFS,
+ .div2_offs = PLL_CMN_POSTDIV2_OFFS,
+ .load_reg = CFG_LOAD,
+ .load_bit = CFG_LOAD_CMN_PLL_BIT,
+};
+
+#define PLL_DDR_CFG1 0x18
+#define PLL_DDR_BYPASS BIT(23)
+#define PLL_DDR_PLLEN BIT(22)
+#define PLL_DDR_4PHASEEN BIT(21)
+#define PLL_DDR_POSTDIVEN BIT(20)
+#define PLL_DDR_DSMEN BIT(19)
+#define PLL_DDR_DACEN BIT(18)
+#define PLL_DDR_DSKEWCALBYP BIT(17)
+#define PLL_DDR_DSKEWCALCNT GENMASK(16, 14)
+#define PLL_DDR_DSKEWCALEN BIT(13)
+#define PLL_DDR_DSKEWCALIN GENMASK(12, 1)
+#define PLL_DDR_DSKEWFASTCAL BIT(0)
+
+#define PLL_DDR_CFG2 0x1c
+#define PLL_DDR_POSTDIV1 GENMASK(29, 27)
+#define PLL_DDR_POSTDIV2 GENMASK(26, 24)
+#define PLL_DDR_FRAC GENMASK(23, 0)
+
+#define PLL_DDR_CFG3 0x20
+#define PLL_DDR_FBDIV GENMASK(17, 6)
+#define PLL_DDR_REFDIV GENMASK(5, 0)
+
+static unsigned long
+sf21_ddrpll_postdiv_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct sf_clk_common *priv = hw_to_sf_clk_common(hw);
+ u32 cfg2 = sf_readl(priv, PLL_DDR_CFG2);
+ u32 postdiv1 = FIELD_GET(PLL_DDR_POSTDIV1, cfg2);
+ u32 postdiv2 = FIELD_GET(PLL_DDR_POSTDIV2, cfg2);
+ u32 cfg3 = sf_readl(priv, PLL_DDR_CFG3);
+ u32 fbdiv = FIELD_GET(PLL_DDR_FBDIV, cfg3);
+ u32 refdiv = FIELD_GET(PLL_DDR_REFDIV, cfg3);
+
+ if (!refdiv || !fbdiv || !postdiv1 || !postdiv2)
+ return 0;
+
+ return div_u64((u64)parent_rate * fbdiv, refdiv * postdiv1 * postdiv2);
+}
+
+static const struct clk_ops sf21_ddrpll_postdiv_ops = {
+ .recalc_rate = sf21_ddrpll_postdiv_recalc_rate,
+};
+
+static struct sf_clk_common ddrpll_postdiv = {
+ .hw.init = CLK_HW_INIT_PARENTS_DATA("ddrpll_postdiv",
+ sf21_ref_parent,
+ &sf21_ddrpll_postdiv_ops, 0),
+};
+
+#define PLL_PCIE_CFG1 0x4c
+#define PLL_PCIE_PLLEN BIT(31)
+#define PLL_PCIE_POSTDIV0PRE BIT(30)
+#define PLL_PCIE_REFDIV GENMASK(29, 24)
+#define PLL_PCIE_FRAC GENMASK(23, 0)
+
+#define PLL_PCIE_CFG2 0x50
+#define PLL_PCIE_FOUTEN_BIT(i) (28 + (i))
+#define PLL_PCIE_BYPASS(i) BIT(24 + (i))
+#define PLL_PCIE_PDIV1_OFFS(i) (21 - 6 * (i))
+#define PLL_PCIE_PDIV2_OFFS(i) (18 - 6 * (i))
+#define PLL_PCIE_PDIV_MASK GENMASK(2, 0)
+
+#define PLL_PCIE_CFG3 0x54
+#define PLL_PCIE_DSKEWFASTCAL BIT(31)
+#define PLL_PCIE_DACEN BIT(30)
+#define PLL_PCIE_DSMEN BIT(29)
+#define PLL_PCIE_DSKEWCALEN BIT(28)
+#define PLL_PCIE_DSKEWCALBYP BIT(27)
+#define PLL_PCIE_DSKEWCALCNT GENMASK(26, 24)
+#define PLL_PCIE_DSKEWCALIN GENMASK(23, 12)
+#define PLL_PCIE_FBDIV GENMASK(11, 0)
+
+static unsigned long
+sf21_pciepll_vco_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
+{
+ struct sf_clk_common *priv = hw_to_sf_clk_common(hw);
+ u32 cfg1 = sf_readl(priv, PLL_PCIE_CFG1);
+ unsigned long refdiv = FIELD_GET(PLL_PCIE_REFDIV, cfg1);
+ u32 cfg3 = sf_readl(priv, PLL_PCIE_CFG3);
+ unsigned long fbdiv = FIELD_GET(PLL_PCIE_FBDIV, cfg3);
+
+ if (!refdiv || !fbdiv)
+ return 0;
+
+ return div_u64((u64)parent_rate * fbdiv, refdiv * 4);
+}
+
+static int sf21_pciepll_vco_enable(struct clk_hw *hw)
+{
+ struct sf_clk_common *priv = hw_to_sf_clk_common(hw);
+ u32 val;
+
+ guard(raw_spinlock_irqsave)(priv->lock);
+ sf_rmw(priv, PLL_PCIE_CFG1, 0, PLL_PCIE_PLLEN);
+ sf_writel(priv, CFG_LOAD, BIT(CFG_LOAD_PCIE_PLL_BIT));
+ sf_writel(priv, CFG_LOAD, 0);
+ return readl_poll_timeout_atomic(priv->base + PLL_PCIE_LOCK, val,
+ val & 1, 0, PLL_LOCK_TIMEOUT_US);
+}
+
+static void sf21_pciepll_vco_disable(struct clk_hw *hw)
+{
+ struct sf_clk_common *priv = hw_to_sf_clk_common(hw);
+
+ guard(raw_spinlock_irqsave)(priv->lock);
+ sf_rmw(priv, PLL_PCIE_CFG1, PLL_PCIE_PLLEN, 0);
+ sf_writel(priv, CFG_LOAD, BIT(CFG_LOAD_PCIE_PLL_BIT));
+ sf_writel(priv, CFG_LOAD, 0);
+}
+
+static int sf21_pciepll_vco_is_enabled(struct clk_hw *hw)
+{
+ struct sf_clk_common *priv = hw_to_sf_clk_common(hw);
+
+ return !!(sf_readl(priv, PLL_PCIE_CFG1) & PLL_PCIE_PLLEN);
+}
+
+static const struct clk_ops sf21_pciepll_vco_ops = {
+ .enable = sf21_pciepll_vco_enable,
+ .disable = sf21_pciepll_vco_disable,
+ .is_enabled = sf21_pciepll_vco_is_enabled,
+ .recalc_rate = sf21_pciepll_vco_recalc_rate,
+};
+
+static struct sf_clk_common pciepll_vco = {
+ .hw.init = CLK_HW_INIT_PARENTS_DATA("pciepll_vco", sf21_ref_parent,
+ &sf21_pciepll_vco_ops,
+ CLK_SET_RATE_GATE),
+};
+
+static const struct clk_ops sf21_pciepll_fout_ops = {
+ .enable = sf21_dual_divider_enable,
+ .disable = sf21_dual_divider_disable,
+ .is_enabled = sf21_dual_divider_is_enabled,
+ .recalc_rate = sf21_dual_divider_recalc_rate,
+ .determine_rate = sf21_dual_divider_determine_rate,
+ .set_rate = sf21_dual_divider_set_rate,
+};
+
+#define SF21_PCIEPLL_FOUT(_name, _idx, _flags) \
+ struct sf_dual_divider _name = { \
+ .common.hw.init = CLK_HW_INIT_HW(#_name, \
+ &pciepll_vco.hw, \
+ &sf21_pciepll_fout_ops,\
+ _flags), \
+ .div_reg = PLL_PCIE_CFG2, \
+ .div1_offs = PLL_PCIE_PDIV1_OFFS(_idx), \
+ .div2_offs = PLL_PCIE_PDIV2_OFFS(_idx), \
+ .en_reg = PLL_PCIE_CFG2, \
+ .en_bit = PLL_PCIE_FOUTEN_BIT(_idx), \
+ .load_reg = CFG_LOAD, \
+ .load_bit = CFG_LOAD_PCIE_PLL_BIT, \
+ .flags = SF_DUAL_DIVIDER_START_FROM_1, \
+ }
+
+static SF21_PCIEPLL_FOUT(pciepll_fout0, 0, 0);
+static SF21_PCIEPLL_FOUT(pciepll_fout1, 1, 0);
+static SF21_PCIEPLL_FOUT(pciepll_fout2, 2, 0);
+static SF21_PCIEPLL_FOUT(pciepll_fout3, 3, 0);
+
+struct sf21_clk_muxdiv {
+ struct sf_clk_common common;
+ u16 en;
+ u8 mux_reg;
+ u8 mux_offs;
+ u8 div_reg;
+ u8 div_offs;
+};
+
+#define CRM_CLK_SEL(_x) ((_x) * 4 + 0x80)
+#define CLK_SEL1_PLL_TEST GENMASK(6, 4)
+#define CRM_CLK_EN 0x8c
+#define CRM_CLK_DIV(_x) ((_x) * 4 + 0x94)
+#define CRM_CLK_DIV_MASK GENMASK(7, 0)
+
+static unsigned long sf21_muxdiv_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct sf_clk_common *cmn_priv = hw_to_sf_clk_common(hw);
+ struct sf21_clk_muxdiv *priv =
+ container_of(cmn_priv, struct sf21_clk_muxdiv, common);
+ ulong div_reg = CRM_CLK_DIV(priv->div_reg);
+ u16 div_offs = priv->div_offs;
+ u16 div_val = (sf_readl(cmn_priv, div_reg) >> div_offs) &
+ CRM_CLK_DIV_MASK;
+ div_val += 1;
+ return parent_rate / div_val;
+}
+
+static int sf21_muxdiv_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ unsigned int div;
+
+ if (!req->rate)
+ return -EINVAL;
+
+ div = DIV_ROUND_CLOSEST(req->best_parent_rate, req->rate);
+ if (!div)
+ div = 1;
+ else if (div > CRM_CLK_DIV_MASK + 1)
+ div = CRM_CLK_DIV_MASK + 1;
+
+ req->rate = req->best_parent_rate / div;
+ return 0;
+}
+
+static int sf21_muxdiv_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct sf_clk_common *cmn_priv = hw_to_sf_clk_common(hw);
+ struct sf21_clk_muxdiv *priv =
+ container_of(cmn_priv, struct sf21_clk_muxdiv, common);
+ ulong div_reg = CRM_CLK_DIV(priv->div_reg);
+ u16 div_offs = priv->div_offs;
+ unsigned int div;
+
+ if (!rate)
+ return -EINVAL;
+
+ div = DIV_ROUND_CLOSEST(parent_rate, rate);
+ if (div < 1)
+ div = 1;
+ else if (div > CRM_CLK_DIV_MASK + 1)
+ div = CRM_CLK_DIV_MASK + 1;
+ div -= 1;
+
+ guard(raw_spinlock_irqsave)(cmn_priv->lock);
+ sf_rmw(cmn_priv, div_reg, CRM_CLK_DIV_MASK << div_offs,
+ div << div_offs);
+ sf_writel(cmn_priv, CFG_LOAD, BIT(CFG_LOAD_DIV_BIT));
+ sf_writel(cmn_priv, CFG_LOAD, 0);
+ return 0;
+}
+
+static int sf21_muxdiv_enable(struct clk_hw *hw)
+{
+ struct sf_clk_common *cmn_priv = hw_to_sf_clk_common(hw);
+ struct sf21_clk_muxdiv *priv =
+ container_of(cmn_priv, struct sf21_clk_muxdiv, common);
+
+ guard(raw_spinlock_irqsave)(cmn_priv->lock);
+ sf_rmw(cmn_priv, CRM_CLK_EN, 0, BIT(priv->en));
+ /*
+ * Clock divider value load only happens when the clock is running.
+ * Pulse the CFG_LOAD_DIV so that set_rate() which happened
+ * before enable() is applied.
+ */
+ sf_writel(cmn_priv, CFG_LOAD, BIT(CFG_LOAD_DIV_BIT));
+ sf_writel(cmn_priv, CFG_LOAD, 0);
+ return 0;
+}
+
+static void sf21_muxdiv_disable(struct clk_hw *hw)
+{
+ struct sf_clk_common *cmn_priv = hw_to_sf_clk_common(hw);
+ struct sf21_clk_muxdiv *priv =
+ container_of(cmn_priv, struct sf21_clk_muxdiv, common);
+
+ guard(raw_spinlock_irqsave)(cmn_priv->lock);
+ sf_rmw(cmn_priv, CRM_CLK_EN, BIT(priv->en), 0);
+}
+
+static int sf21_muxdiv_is_enabled(struct clk_hw *hw)
+{
+ struct sf_clk_common *cmn_priv = hw_to_sf_clk_common(hw);
+ struct sf21_clk_muxdiv *priv =
+ container_of(cmn_priv, struct sf21_clk_muxdiv, common);
+ u32 reg_val = sf_readl(cmn_priv, CRM_CLK_EN);
+
+ return reg_val & (BIT(priv->en)) ? 1 : 0;
+}
+
+static u8 sf21_muxdiv_get_parent(struct clk_hw *hw)
+{
+ struct sf_clk_common *cmn_priv = hw_to_sf_clk_common(hw);
+ struct sf21_clk_muxdiv *priv =
+ container_of(cmn_priv, struct sf21_clk_muxdiv, common);
+ ulong mux_reg = CRM_CLK_SEL(priv->mux_reg);
+ u16 mux_offs = priv->mux_offs;
+ u32 reg_val = sf_readl(cmn_priv, mux_reg);
+
+ return reg_val & BIT(mux_offs) ? 1 : 0;
+}
+
+static int sf21_muxdiv_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct sf_clk_common *cmn_priv = hw_to_sf_clk_common(hw);
+ struct sf21_clk_muxdiv *priv =
+ container_of(cmn_priv, struct sf21_clk_muxdiv, common);
+ ulong mux_reg = CRM_CLK_SEL(priv->mux_reg);
+ u16 mux_offs = priv->mux_offs;
+
+ guard(raw_spinlock_irqsave)(cmn_priv->lock);
+ if (index)
+ sf_rmw(cmn_priv, mux_reg, 0, BIT(mux_offs));
+ else
+ sf_rmw(cmn_priv, mux_reg, BIT(mux_offs), 0);
+
+ return 0;
+}
+
+static const struct clk_ops sf21_clk_muxdiv_ops = {
+ .enable = sf21_muxdiv_enable,
+ .disable = sf21_muxdiv_disable,
+ .is_enabled = sf21_muxdiv_is_enabled,
+ .recalc_rate = sf21_muxdiv_recalc_rate,
+ .determine_rate = sf21_muxdiv_determine_rate,
+ .set_rate = sf21_muxdiv_set_rate,
+ .get_parent = sf21_muxdiv_get_parent,
+ .set_parent = sf21_muxdiv_set_parent,
+};
+
+#define SF21_MUXDIV(_name, _parents, _mux_reg, _mux_offs, _div_reg, \
+ _div_offs, _en, _flags) \
+ struct sf21_clk_muxdiv _name = { \
+ .common.hw.init = CLK_HW_INIT_PARENTS_HW( \
+ #_name, _parents, &sf21_clk_muxdiv_ops, _flags), \
+ .en = _en, \
+ .mux_reg = _mux_reg, \
+ .mux_offs = _mux_offs, \
+ .div_reg = _div_reg, \
+ .div_offs = _div_offs, \
+ }
+
+static const struct clk_hw *clk_periph_parents[] = {
+ &cmnpll_postdiv.common.hw,
+ &ddrpll_postdiv.hw,
+};
+
+static const struct clk_hw *clk_ddr_parents[] = {
+ &ddrpll_postdiv.hw,
+ &cmnpll_postdiv.common.hw,
+};
+
+static const struct clk_hw *clk_gmac_usb_parents[] = {
+ &cmnpll_vco.hw,
+ &ddrpll_postdiv.hw,
+};
+
+static SF21_MUXDIV(muxdiv_cpu, clk_periph_parents, 0, 1, 0, 0, 0,
+ CLK_IS_CRITICAL);
+static SF21_MUXDIV(muxdiv_pic, clk_periph_parents, 0, 3, 3, 16, 1,
+ CLK_IS_CRITICAL);
+static SF21_MUXDIV(muxdiv_axi, clk_periph_parents, 0, 5, 0, 8, 2,
+ CLK_IS_CRITICAL);
+static SF21_MUXDIV(muxdiv_ahb, clk_periph_parents, 0, 7, 0, 16, 3,
+ CLK_IS_CRITICAL);
+static SF21_MUXDIV(muxdiv_apb, clk_periph_parents, 0, 9, 0, 24, 4,
+ CLK_IS_CRITICAL);
+static SF21_MUXDIV(muxdiv_uart, clk_periph_parents, 0, 11, 1, 0, 5, 0);
+static SF21_MUXDIV(muxdiv_iram, clk_periph_parents, 0, 13, 1, 8, 6, 0);
+static SF21_MUXDIV(muxdiv_npu, clk_periph_parents, 0, 17, 1, 24, 8, 0);
+static SF21_MUXDIV(muxdiv_ddrphy, clk_ddr_parents, 0, 19, 2, 0, 9,
+ CLK_IS_CRITICAL);
+static SF21_MUXDIV(muxdiv_ddr_bypass, clk_ddr_parents, 0, 21, 3, 0, 10,
+ CLK_IS_CRITICAL);
+static SF21_MUXDIV(muxdiv_ethtsu, clk_periph_parents, 0, 25, 2, 16, 12,
+ 0);
+static SF21_MUXDIV(muxdiv_gmac_byp_ref, clk_gmac_usb_parents, 0, 27, 2,
+ 24, 13, 0);
+static SF21_MUXDIV(muxdiv_usb, clk_gmac_usb_parents, 1, 1, 1, 16, 24, 0);
+static SF21_MUXDIV(muxdiv_usbphy, clk_gmac_usb_parents, 1, 3, 2, 8, 25,
+ 0);
+static SF21_MUXDIV(muxdiv_serdes_csr, clk_periph_parents, 1, 15, 5, 0,
+ 20, 0);
+static SF21_MUXDIV(muxdiv_crypt_csr, clk_periph_parents, 1, 17, 5, 8,
+ 21, 0);
+static SF21_MUXDIV(muxdiv_crypt_app, clk_periph_parents, 1, 19, 5, 16,
+ 22, 0);
+static SF21_MUXDIV(muxdiv_irom, clk_periph_parents, 1, 21, 5, 24, 23,
+ CLK_IS_CRITICAL);
+
+static int sf21_mux_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ req->rate = req->best_parent_rate;
+ return 0;
+}
+
+static const struct clk_ops sf21_clk_mux_ops = {
+ .get_parent = sf21_muxdiv_get_parent,
+ .set_parent = sf21_muxdiv_set_parent,
+ .determine_rate = sf21_mux_determine_rate,
+};
+
+#define SF21_MUX(_name, _parents, _mux_reg, _mux_offs, _flags) \
+ struct sf21_clk_muxdiv _name = { \
+ .common.hw.init = CLK_HW_INIT_PARENTS_DATA( \
+ #_name, _parents, &sf21_clk_mux_ops, _flags), \
+ .en = 0, \
+ .mux_reg = _mux_reg, \
+ .mux_offs = _mux_offs, \
+ .div_reg = 0, \
+ .div_offs = 0, \
+ }
+
+static const struct clk_parent_data clk_boot_parents[] = {
+ { .hw = &muxdiv_irom.common.hw },
+ { .index = 0 },
+};
+
+static SF21_MUX(mux_boot, clk_boot_parents, 0, 30, CLK_IS_CRITICAL);
+
+static const struct clk_ops sf21_clk_div_ops = {
+ .recalc_rate = sf21_muxdiv_recalc_rate,
+ .determine_rate = sf21_muxdiv_determine_rate,
+ .set_rate = sf21_muxdiv_set_rate,
+};
+
+#define SF21_DIV(_name, _parents, _div_reg, _div_offs, _flags) \
+ struct sf21_clk_muxdiv _name = { \
+ .common.hw.init = CLK_HW_INIT_PARENTS_DATA( \
+ #_name, _parents, &sf21_clk_div_ops, _flags), \
+ .en = 0, \
+ .mux_reg = 0, \
+ .mux_offs = 0, \
+ .div_reg = _div_reg, \
+ .div_offs = _div_offs, \
+ }
+
+static SF21_DIV(div_pvt, sf21_ref_parent, 3, 8, 0);
+
+static const struct clk_hw *clk_pll_test_parents[] = {
+ &cmnpll_postdiv.common.hw,
+ &ddrpll_postdiv.hw,
+ &pciepll_fout3.common.hw,
+};
+
+static u8 sf21_pll_test_get_parent(struct clk_hw *hw)
+{
+ struct sf_clk_common *cmn_priv = hw_to_sf_clk_common(hw);
+ u32 reg_val = sf_readl(cmn_priv, CRM_CLK_SEL(1));
+ u8 parent = FIELD_GET(CLK_SEL1_PLL_TEST, reg_val);
+
+ if (parent >= ARRAY_SIZE(clk_pll_test_parents))
+ return 0;
+
+ return parent;
+}
+
+static int sf21_pll_test_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct sf_clk_common *cmn_priv = hw_to_sf_clk_common(hw);
+
+ if (index >= ARRAY_SIZE(clk_pll_test_parents))
+ return -EINVAL;
+
+ guard(raw_spinlock_irqsave)(cmn_priv->lock);
+ sf_rmw(cmn_priv, CRM_CLK_SEL(1), CLK_SEL1_PLL_TEST,
+ FIELD_PREP(CLK_SEL1_PLL_TEST, index));
+ return 0;
+}
+
+static const struct clk_ops sf21_clk_pll_test_ops = {
+ .recalc_rate = sf21_muxdiv_recalc_rate,
+ .determine_rate = sf21_muxdiv_determine_rate,
+ .set_rate = sf21_muxdiv_set_rate,
+ .get_parent = sf21_pll_test_get_parent,
+ .set_parent = sf21_pll_test_set_parent,
+};
+
+static struct sf21_clk_muxdiv muxdiv_pll_test = {
+ .common.hw.init = CLK_HW_INIT_PARENTS_HW("muxdiv_pll_test",
+ clk_pll_test_parents,
+ &sf21_clk_pll_test_ops, 0),
+ .en = 0,
+ .mux_reg = 0,
+ .mux_offs = 0,
+ .div_reg = 3,
+ .div_offs = 24,
+};
+
+static const struct clk_ops sf21_clk_gate_ops = {
+ .enable = sf21_muxdiv_enable,
+ .disable = sf21_muxdiv_disable,
+ .is_enabled = sf21_muxdiv_is_enabled,
+};
+
+#define SF21_GATE(_name, _parents, _en, _flags) \
+ struct sf21_clk_muxdiv _name = { \
+ .common.hw.init = CLK_HW_INIT_PARENTS_HW( \
+ #_name, _parents, &sf21_clk_gate_ops, _flags), \
+ .en = _en, \
+ .mux_reg = 0, \
+ .mux_offs = 0, \
+ .div_reg = 0, \
+ .div_offs = 0, \
+ }
+
+static const struct clk_hw *clk_pcie_parents[] = {
+ &pciepll_fout1.common.hw,
+};
+
+static SF21_GATE(pcie_refclk_n, clk_pcie_parents, 15, 0);
+static SF21_GATE(pcie_refclk_p, clk_pcie_parents, 16, 0);
+
+#define SF21_NUM_CLKS 31
+
+static struct clk_hw_onecell_data sf21_hw_clks = {
+ .num = SF21_NUM_CLKS,
+ .hws = {
+ [SF21_CLK_CMNPLL_VCO] = &cmnpll_vco.hw,
+ [SF21_CLK_CMNPLL_POSTDIV] = &cmnpll_postdiv.common.hw,
+ [SF21_CLK_DDRPLL_POSTDIV] = &ddrpll_postdiv.hw,
+ [SF21_CLK_PCIEPLL_VCO] = &pciepll_vco.hw,
+ [SF21_CLK_PCIEPLL_FOUT0] = &pciepll_fout0.common.hw,
+ [SF21_CLK_PCIEPLL_FOUT1] = &pciepll_fout1.common.hw,
+ [SF21_CLK_PCIEPLL_FOUT2] = &pciepll_fout2.common.hw,
+ [SF21_CLK_PCIEPLL_FOUT3] = &pciepll_fout3.common.hw,
+ [SF21_CLK_CPU] = &muxdiv_cpu.common.hw,
+ [SF21_CLK_PIC] = &muxdiv_pic.common.hw,
+ [SF21_CLK_AXI] = &muxdiv_axi.common.hw,
+ [SF21_CLK_AHB] = &muxdiv_ahb.common.hw,
+ [SF21_CLK_APB] = &muxdiv_apb.common.hw,
+ [SF21_CLK_UART] = &muxdiv_uart.common.hw,
+ [SF21_CLK_IRAM] = &muxdiv_iram.common.hw,
+ [SF21_CLK_NPU] = &muxdiv_npu.common.hw,
+ [SF21_CLK_DDRPHY_REF] = &muxdiv_ddrphy.common.hw,
+ [SF21_CLK_DDR_BYPASS] = &muxdiv_ddr_bypass.common.hw,
+ [SF21_CLK_ETHTSU] = &muxdiv_ethtsu.common.hw,
+ [SF21_CLK_GMAC_BYP_REF] = &muxdiv_gmac_byp_ref.common.hw,
+ [SF21_CLK_USB] = &muxdiv_usb.common.hw,
+ [SF21_CLK_USBPHY] = &muxdiv_usbphy.common.hw,
+ [SF21_CLK_SERDES_CSR] = &muxdiv_serdes_csr.common.hw,
+ [SF21_CLK_CRYPT_CSR] = &muxdiv_crypt_csr.common.hw,
+ [SF21_CLK_CRYPT_APP] = &muxdiv_crypt_app.common.hw,
+ [SF21_CLK_IROM] = &muxdiv_irom.common.hw,
+ [SF21_CLK_BOOT] = &mux_boot.common.hw,
+ [SF21_CLK_PVT] = &div_pvt.common.hw,
+ [SF21_CLK_PLL_TEST] = &muxdiv_pll_test.common.hw,
+ [SF21_CLK_PCIE_REFN] = &pcie_refclk_n.common.hw,
+ [SF21_CLK_PCIE_REFP] = &pcie_refclk_p.common.hw,
+ }
+};
+
+struct sf21_clk_ctrl {
+ void __iomem *base;
+ /* Serializes register RMW sequences by clock ops. */
+ raw_spinlock_t clk_lock;
+ /* Serializes register RMW sequences by reset ops. */
+ spinlock_t rst_lock;
+ struct reset_controller_dev rcdev;
+ const u32 *reset_bits;
+ unsigned int nr_resets;
+};
+
+#define SF21_SOFT_RESET 0xc0
+
+static const u32 sf21_topcrm_reset_bits[] = {
+ [SF21_RESET_GIC] = BIT(1),
+ [SF21_RESET_AXI] = BIT(2),
+ [SF21_RESET_AHB] = BIT(3),
+ [SF21_RESET_APB] = BIT(4),
+ [SF21_RESET_IRAM] = BIT(5),
+ [SF21_RESET_NPU] = BIT(7),
+ [SF21_RESET_DDR_CTL] = BIT(8),
+ [SF21_RESET_DDR_PHY] = BIT(9),
+ [SF21_RESET_DDR_PWR_OK_IN] = BIT(10),
+ [SF21_RESET_DDR_CTL_APB] = BIT(11),
+ [SF21_RESET_DDR_PHY_APB] = BIT(12),
+ [SF21_RESET_USB] = BIT(19),
+ [SF21_RESET_PVT] = BIT(23),
+ [SF21_RESET_SERDES_CSR] = BIT(24),
+ [SF21_RESET_CRYPT_CSR] = BIT(28),
+ [SF21_RESET_CRYPT_APP] = BIT(29),
+ [SF21_RESET_NPU2DDR_ASYNCBRIDGE] = BIT(30),
+ [SF21_RESET_IROM] = BIT(31),
+};
+
+static inline struct sf21_clk_ctrl *
+rcdev_to_sf21_topcrm(struct reset_controller_dev *rcdev)
+{
+ return container_of(rcdev, struct sf21_clk_ctrl, rcdev);
+}
+
+static int sf21_topcrm_reset_update(struct reset_controller_dev *rcdev,
+ unsigned long id, bool assert)
+{
+ struct sf21_clk_ctrl *ctrl = rcdev_to_sf21_topcrm(rcdev);
+ u32 bit = ctrl->reset_bits[id];
+ u32 reg;
+
+ guard(spinlock_irqsave)(&ctrl->rst_lock);
+ reg = readl(ctrl->base + SF21_SOFT_RESET);
+ if (assert)
+ reg &= ~bit;
+ else
+ reg |= bit;
+ writel(reg, ctrl->base + SF21_SOFT_RESET);
+
+ return 0;
+}
+
+static int sf21_topcrm_reset_assert(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ return sf21_topcrm_reset_update(rcdev, id, true);
+}
+
+static int sf21_topcrm_reset_deassert(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ return sf21_topcrm_reset_update(rcdev, id, false);
+}
+
+static int sf21_topcrm_reset_status(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ struct sf21_clk_ctrl *ctrl = rcdev_to_sf21_topcrm(rcdev);
+ u32 bit = ctrl->reset_bits[id];
+
+ return !(readl(ctrl->base + SF21_SOFT_RESET) & bit);
+}
+
+static const struct reset_control_ops sf21_topcrm_reset_ops = {
+ .assert = sf21_topcrm_reset_assert,
+ .deassert = sf21_topcrm_reset_deassert,
+ .status = sf21_topcrm_reset_status,
+};
+
+static int sf21_topcrm_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct sf21_clk_ctrl *ctrl;
+ int i, ret;
+
+ ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
+ if (!ctrl)
+ return -ENOMEM;
+
+ ctrl->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(ctrl->base))
+ return dev_err_probe(dev, PTR_ERR(ctrl->base),
+ "failed to map resources\n");
+
+ raw_spin_lock_init(&ctrl->clk_lock);
+ spin_lock_init(&ctrl->rst_lock);
+
+ for (i = 0; i < sf21_hw_clks.num; i++) {
+ struct clk_hw *hw = sf21_hw_clks.hws[i];
+ struct sf_clk_common *common;
+
+ if (!hw)
+ continue;
+ common = hw_to_sf_clk_common(hw);
+ common->base = ctrl->base;
+ common->lock = &ctrl->clk_lock;
+ ret = devm_clk_hw_register(dev, hw);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "failed to register clock %d\n",
+ i);
+ }
+
+ ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
+ &sf21_hw_clks);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to add hw provider\n");
+
+ ctrl->reset_bits = sf21_topcrm_reset_bits;
+ ctrl->nr_resets = ARRAY_SIZE(sf21_topcrm_reset_bits);
+ ctrl->rcdev.owner = THIS_MODULE;
+ ctrl->rcdev.nr_resets = ctrl->nr_resets;
+ ctrl->rcdev.ops = &sf21_topcrm_reset_ops;
+ ctrl->rcdev.of_node = dev->of_node;
+ ctrl->rcdev.of_reset_n_cells = 1;
+
+ ret = devm_reset_controller_register(dev, &ctrl->rcdev);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "failed to register reset controller\n");
+
+ return 0;
+}
+
+static const struct of_device_id sf21_topcrm_dt_ids[] = {
+ { .compatible = "siflower,sf21-topcrm" },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, sf21_topcrm_dt_ids);
+
+static struct platform_driver sf21_topcrm_driver = {
+ .probe = sf21_topcrm_probe,
+ .driver = {
+ .name = "sf21-topcrm",
+ .suppress_bind_attrs = true,
+ .of_match_table = sf21_topcrm_dt_ids,
+ },
+};
+module_platform_driver(sf21_topcrm_driver);
+
+MODULE_AUTHOR("Chuanhong Guo <gch981213@gmail.com>");
+MODULE_DESCRIPTION("driver for Siflower SF21 top clock and reset module");
+MODULE_LICENSE("GPL");
--
2.54.0
^ permalink raw reply related [flat|nested] 5+ messages in thread