Add support for Renesas versa3 clock driver(5p35023).
The clock generator provides 6 output clocks.
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
v4->v5:
* Added missing .determine_rate() for muxes
* Fixed smatch warning: replace divide condition 'req->best_parent_rate / req->rate'
with 'req->best_parent_rate >= req->rate' Reported-by: kernel test robot <lkp@xxxxxxxxx>
and Reported-by: Dan Carpenter <error27@xxxxxxxxx>
v3->v4:
* Fixed the warning reported by kernel test robot.
* Added error check for devm_clk_hw_register_fixed_factor_* in probe().
v2->v3:
* Updated copy right information.
* Removed .name from parent data and started using index or struct clk_hw.
* Dropped vc3_clk_out_ops and started using fixed factor clocks for
output clk.
* Dropped vc3_divider_type_parse_dt function.
* Dropped struct vc3_driver_data
RFC->v2:
* Dropped header file <linux/clk.h> and removed all
consumer api's
* struct clk_parent_data used for assigning the parent names.
* Replaced initpointer->const init pointer in vc3_clk_register
* Replaced of_clk_add_hw_provider with devm_clk_add_hw_provider
* Dropped vc3_remove() callback.
---
drivers/clk/Kconfig | 9 +
drivers/clk/Makefile | 1 +
drivers/clk/clk-versaclock3.c | 1144 +++++++++++++++++++++++++++++++++
3 files changed, 1154 insertions(+)
create mode 100644 drivers/clk/clk-versaclock3.c
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 016814e15536..73f2ef11ffd5 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -385,6 +385,15 @@ config COMMON_CLK_SI521XX
This driver supports the SkyWorks Si521xx PCIe clock generator
models Si52144/Si52146/Si52147.
+config COMMON_CLK_VC3
+ tristate "Clock driver for Renesas VersaClock 3 devices"
+ depends on I2C
+ depends on OF
+ select REGMAP_I2C
+ help
+ This driver supports the Renesas VersaClock 3 programmable clock
+ generators.
+
config COMMON_CLK_VC5
tristate "Clock driver for IDT VersaClock 5,6 devices"
depends on I2C
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 0aebef17edc6..ce1b05e73b6f 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -76,6 +76,7 @@ obj-$(CONFIG_CLK_TWL6040) += clk-twl6040.o
obj-$(CONFIG_ARCH_VT8500) += clk-vt8500.o
obj-$(CONFIG_COMMON_CLK_RS9_PCIE) += clk-renesas-pcie.o
obj-$(CONFIG_COMMON_CLK_SI521XX) += clk-si521xx.o
+obj-$(CONFIG_COMMON_CLK_VC3) += clk-versaclock3.o
obj-$(CONFIG_COMMON_CLK_VC5) += clk-versaclock5.o
obj-$(CONFIG_COMMON_CLK_VC7) += clk-versaclock7.o
obj-$(CONFIG_COMMON_CLK_WM831X) += clk-wm831x.o
diff --git a/drivers/clk/clk-versaclock3.c b/drivers/clk/clk-versaclock3.c
new file mode 100644
index 000000000000..e89bfe4b8fd4
--- /dev/null
+++ b/drivers/clk/clk-versaclock3.c
@@ -0,0 +1,1144 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Driver for Renesas Versaclock 3
+ *
+ * Copyright (C) 2023 Renesas Electronics Corp.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/i2c.h>
+#include <linux/limits.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#define NUM_CONFIG_REGISTERS 37
+
+#define VC3_GENERAL_CTR 0x0
+#define VC3_GENERAL_CTR_DIV1_SRC_SEL BIT(3)
+#define VC3_GENERAL_CTR_PLL3_REFIN_SEL BIT(2)
+
+#define VC3_PLL3_M_DIVIDER 0x3
+#define VC3_PLL3_M_DIV1 BIT(7)
+#define VC3_PLL3_M_DIV2 BIT(6)
+#define VC3_PLL3_M_DIV(n) ((n) & GENMASK(5, 0))
+
+#define VC3_PLL3_N_DIVIDER 0x4
+#define VC3_PLL3_LOOP_FILTER_N_DIV_MSB 0x5
+
+#define VC3_PLL3_CHARGE_PUMP_CTRL 0x6
+#define VC3_PLL3_CHARGE_PUMP_CTRL_OUTDIV3_SRC_SEL BIT(7)
+
+#define VC3_PLL1_CTRL_OUTDIV5 0x7
+#define VC3_PLL1_CTRL_OUTDIV5_PLL1_MDIV_DOUBLER BIT(7)
+
+#define VC3_PLL1_M_DIVIDER 0x8
+#define VC3_PLL1_M_DIV1 BIT(7)
+#define VC3_PLL1_M_DIV2 BIT(6)
+#define VC3_PLL1_M_DIV(n) ((n) & GENMASK(5, 0))
+
+#define VC3_PLL1_VCO_N_DIVIDER 0x9
+#define VC3_PLL1_LOOP_FILTER_N_DIV_MSB 0x0a
+
+#define VC3_OUT_DIV1_DIV2_CTRL 0xf
+
+#define VC3_PLL2_FB_INT_DIV_MSB 0x10
+#define VC3_PLL2_FB_INT_DIV_LSB 0x11
+#define VC3_PLL2_FB_FRC_DIV_MSB 0x12
+#define VC3_PLL2_FB_FRC_DIV_LSB 0x13
+
+#define VC3_PLL2_M_DIVIDER 0x1a
+#define VC3_PLL2_MDIV_DOUBLER BIT(7)
+#define VC3_PLL2_M_DIV1 BIT(6)
+#define VC3_PLL2_M_DIV2 BIT(5)
+#define VC3_PLL2_M_DIV(n) ((n) & GENMASK(4, 0))
+
+#define VC3_OUT_DIV3_DIV4_CTRL 0x1b
+
+#define VC3_PLL_OP_CTRL 0x1c
+#define VC3_PLL_OP_CTRL_PLL2_REFIN_SEL 6
+
+#define VC3_OUTPUT_CTR 0x1d
+#define VC3_OUTPUT_CTR_DIV4_SRC_SEL BIT(3)
+
+#define VC3_SE2_CTRL_REG0 0x1f
+#define VC3_SE2_CTRL_REG0_SE2_CLK_SEL BIT(6)
+
+#define VC3_SE3_DIFF1_CTRL_REG 0x21
+#define VC3_SE3_DIFF1_CTRL_REG_SE3_CLK_SEL BIT(6)
+
+#define VC3_DIFF1_CTRL_REG 0x22
+#define VC3_DIFF1_CTRL_REG_DIFF1_CLK_SEL BIT(7)
+
+#define VC3_DIFF2_CTRL_REG 0x23
+#define VC3_DIFF2_CTRL_REG_DIFF2_CLK_SEL BIT(7)
+
+#define VC3_SE1_DIV4_CTRL 0x24
+#define VC3_SE1_DIV4_CTRL_SE1_CLK_SEL BIT(3)
+
+#define VC3_PLL1_VCO_MIN 300000000UL
+#define VC3_PLL1_VCO_MAX 600000000UL
+
+#define VC3_PLL2_VCO_MIN 400000000UL
+#define VC3_PLL2_VCO_MAX 1200000000UL
+
+#define VC3_PLL3_VCO_MIN 300000000UL
+#define VC3_PLL3_VCO_MAX 800000000UL
+
+#define VC3_2_POW_16 (U16_MAX + 1)
+#define VC3_DIV_MASK(width) ((1 << (width)) - 1)
+
+enum vc3_pfd_mux {
+ VC3_PFD2_MUX,
+ VC3_PFD3_MUX,
+};
+
+enum vc3_pfd {
+ VC3_PFD1,
+ VC3_PFD2,
+ VC3_PFD3,
+};
+
+enum vc3_pll {
+ VC3_PLL1,
+ VC3_PLL2,
+ VC3_PLL3,
+};
+
+enum vc3_div_mux {
+ VC3_DIV1_MUX,
+ VC3_DIV3_MUX,
+ VC3_DIV4_MUX,
+};
+
+enum vc3_div {
+ VC3_DIV1,
+ VC3_DIV2,
+ VC3_DIV3,
+ VC3_DIV4,
+ VC3_DIV5,
+};
+
+enum vc3_clk_mux {
+ VC3_DIFF2_MUX,
+ VC3_DIFF1_MUX,
+ VC3_SE3_MUX,
+ VC3_SE2_MUX,
+ VC3_SE1_MUX,
+};
+
+enum vc3_clk {
+ VC3_DIFF2,
+ VC3_DIFF1,
+ VC3_SE3,
+ VC3_SE2,
+ VC3_SE1,
+ VC3_REF,
+};
+
+struct vc3_clk_data {
+ u8 offs;
+ u8 bitmsk;
+};
+
+struct vc3_pfd_data {
+ u8 num;
+ u8 offs;
+ u8 mdiv1_bitmsk;
+ u8 mdiv2_bitmsk;
+};
+
+struct vc3_pll_data {
+ u8 num;
+ u8 int_div_msb_offs;
+ u8 int_div_lsb_offs;
+ unsigned long vco_min;
+ unsigned long vco_max;
+};
+
+struct vc3_div_data {
+ u8 offs;
+ const struct clk_div_table *table;
+ u8 shift;
+ u8 width;
+ u8 flags;
+};
+
+struct vc3_hw_data {
+ struct clk_hw hw;
+ struct regmap *regmap;
+ const void *data;
+
+ u32 div_int;
+ u32 div_frc;
+};
+
+static const struct clk_div_table div1_divs[] = {
+ { .val = 0, .div = 1, }, { .val = 1, .div = 4, },
+ { .val = 2, .div = 5, }, { .val = 3, .div = 6, },
+ { .val = 4, .div = 2, }, { .val = 5, .div = 8, },
+ { .val = 6, .div = 10, }, { .val = 7, .div = 12, },
+ { .val = 8, .div = 4, }, { .val = 9, .div = 16, },
+ { .val = 10, .div = 20, }, { .val = 11, .div = 24, },
+ { .val = 12, .div = 8, }, { .val = 13, .div = 32, },
+ { .val = 14, .div = 40, }, { .val = 15, .div = 48, },
+ {}
+};
+
+static const struct clk_div_table div245_divs[] = {
+ { .val = 0, .div = 1, }, { .val = 1, .div = 3, },
+ { .val = 2, .div = 5, }, { .val = 3, .div = 10, },
+ { .val = 4, .div = 2, }, { .val = 5, .div = 6, },
+ { .val = 6, .div = 10, }, { .val = 7, .div = 20, },
+ { .val = 8, .div = 4, }, { .val = 9, .div = 12, },
+ { .val = 10, .div = 20, }, { .val = 11, .div = 40, },
+ { .val = 12, .div = 5, }, { .val = 13, .div = 15, },
+ { .val = 14, .div = 25, }, { .val = 15, .div = 50, },
+ {}
+};
+
+static const struct clk_div_table div3_divs[] = {
+ { .val = 0, .div = 1, }, { .val = 1, .div = 3, },
+ { .val = 2, .div = 5, }, { .val = 3, .div = 10, },
+ { .val = 4, .div = 2, }, { .val = 5, .div = 6, },
+ { .val = 6, .div = 10, }, { .val = 7, .div = 20, },
+ { .val = 8, .div = 4, }, { .val = 9, .div = 12, },
+ { .val = 10, .div = 20, }, { .val = 11, .div = 40, },
+ { .val = 12, .div = 8, }, { .val = 13, .div = 24, },
+ { .val = 14, .div = 40, }, { .val = 15, .div = 80, },
+ {}
+};
+
+static struct clk_hw *clk_out[6];
+
+static unsigned char vc3_pfd_mux_get_parent(struct clk_hw *hw)
+{
+ struct vc3_hw_data *vc3 = container_of(hw, struct vc3_hw_data, hw);
+ const struct vc3_clk_data *pfd_mux = vc3->data;
+ u32 src;
+
+ regmap_read(vc3->regmap, pfd_mux->offs, &src);
+
+ return !!(src & pfd_mux->bitmsk);
+}
+
+static int vc3_pfd_mux_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct vc3_hw_data *vc3 = container_of(hw, struct vc3_hw_data, hw);
+ const struct vc3_clk_data *pfd_mux = vc3->data;
+
+ regmap_update_bits(vc3->regmap, pfd_mux->offs, pfd_mux->bitmsk,
+ index ? pfd_mux->bitmsk : 0);
+ return 0;
+}
+
+static const struct clk_ops vc3_pfd_mux_ops = {
+ .determine_rate = __clk_mux_determine_rate,
+ .set_parent = vc3_pfd_mux_set_parent,
+ .get_parent = vc3_pfd_mux_get_parent,
+};
+
+static unsigned long vc3_pfd_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct vc3_hw_data *vc3 = container_of(hw, struct vc3_hw_data, hw);
+ const struct vc3_pfd_data *pfd = vc3->data;
+ unsigned int prediv, premul;
+ unsigned long rate;
+ u8 mdiv;
+
+ regmap_read(vc3->regmap, pfd->offs, &prediv);
+ if (pfd->num == VC3_PFD1) {
+ /* The bypass_prediv is set, PLL fed from Ref_in directly. */
+ if (prediv & pfd->mdiv1_bitmsk) {
+ /* check doubler is set or not */
+ regmap_read(vc3->regmap, VC3_PLL1_CTRL_OUTDIV5, &premul);
+ if (premul & VC3_PLL1_CTRL_OUTDIV5_PLL1_MDIV_DOUBLER)
+ parent_rate *= 2;
+ return parent_rate;
+ }
+ mdiv = VC3_PLL1_M_DIV(prediv);
+ } else if (pfd->num == VC3_PFD2) {
+ /* The bypass_prediv is set, PLL fed from Ref_in directly. */
+ if (prediv & pfd->mdiv1_bitmsk) {
+ regmap_read(vc3->regmap, VC3_PLL2_M_DIVIDER, &premul);
+ /* check doubler is set or not */
+ if (premul & VC3_PLL2_MDIV_DOUBLER)
+ parent_rate *= 2;
+ return parent_rate;
+ }
+
+ mdiv = VC3_PLL2_M_DIV(prediv);
+ } else {
+ /* The bypass_prediv is set, PLL fed from Ref_in directly. */
+ if (prediv & pfd->mdiv1_bitmsk)
+ return parent_rate;
+
+ mdiv = VC3_PLL3_M_DIV(prediv);
+ }
+
+ if (prediv & pfd->mdiv2_bitmsk)
+ rate = parent_rate / 2;
+ else
+ rate = parent_rate / mdiv;
+
+ return rate;
+}
+
+static long vc3_pfd_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct vc3_hw_data *vc3 = container_of(hw, struct vc3_hw_data, hw);
+ const struct vc3_pfd_data *pfd = vc3->data;
+ unsigned long idiv;
+
+ /* PLL cannot operate with input clock above 50 MHz. */
+ if (rate > 50000000)
+ return -EINVAL;
+
+ /* CLKIN within range of PLL input, feed directly to PLL. */
+ if (*parent_rate <= 50000000)
+ return *parent_rate;
+
+ idiv = DIV_ROUND_UP(*parent_rate, rate);
+ if (pfd->num == VC3_PFD1 || pfd->num == VC3_PFD3) {
+ if (idiv > 63)
+ return -EINVAL;
+ } else {
+ if (idiv > 31)
+ return -EINVAL;
+ }
+
+ return *parent_rate / idiv;
+}
+
+static int vc3_pfd_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct vc3_hw_data *vc3 = container_of(hw, struct vc3_hw_data, hw);
+ const struct vc3_pfd_data *pfd = vc3->data;
+ unsigned long idiv;
+ u8 div;
+
+ /* CLKIN within range of PLL input, feed directly to PLL. */
+ if (parent_rate <= 50000000) {
+ regmap_update_bits(vc3->regmap, pfd->offs, pfd->mdiv1_bitmsk,
+ pfd->mdiv1_bitmsk);
+ regmap_update_bits(vc3->regmap, pfd->offs, pfd->mdiv2_bitmsk, 0);
+ return 0;
+ }
+
+ idiv = DIV_ROUND_UP(parent_rate, rate);
+ /* We have dedicated div-2 predivider. */
+ if (idiv == 2) {
+ regmap_update_bits(vc3->regmap, pfd->offs, pfd->mdiv2_bitmsk,
+ pfd->mdiv2_bitmsk);
+ regmap_update_bits(vc3->regmap, pfd->offs, pfd->mdiv1_bitmsk, 0);
+ } else {
+ if (pfd->num == VC3_PFD1)
+ div = VC3_PLL1_M_DIV(idiv);
+ else if (pfd->num == VC3_PFD2)
+ div = VC3_PLL2_M_DIV(idiv);
+ else
+ div = VC3_PLL3_M_DIV(idiv);
+
+ regmap_write(vc3->regmap, pfd->offs, div);
+ }
+
+ return 0;
+}
+
+static const struct clk_ops vc3_pfd_ops = {
+ .recalc_rate = vc3_pfd_recalc_rate,
+ .round_rate = vc3_pfd_round_rate,
+ .set_rate = vc3_pfd_set_rate,
+};
+
+static unsigned long vc3_pll_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct vc3_hw_data *vc3 = container_of(hw, struct vc3_hw_data, hw);
+ const struct vc3_pll_data *pll = vc3->data;
+ u32 div_int, div_frc, val;
+ unsigned long rate;
+
+ regmap_read(vc3->regmap, pll->int_div_msb_offs, &val);
+ div_int = (val & GENMASK(2, 0)) << 8;
+ regmap_read(vc3->regmap, pll->int_div_lsb_offs, &val);
+ div_int |= val;
+
+ if (pll->num == VC3_PLL2) {
+ regmap_read(vc3->regmap, VC3_PLL2_FB_FRC_DIV_MSB, &val);
+ div_frc = val << 8;
+ regmap_read(vc3->regmap, VC3_PLL2_FB_FRC_DIV_LSB, &val);
+ div_frc |= val;
+ rate = (parent_rate *
+ (div_int * VC3_2_POW_16 + div_frc) / VC3_2_POW_16);
+ } else {
+ rate = parent_rate * div_int;
+ }
+
+ return rate;
+}
+
+static long vc3_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct vc3_hw_data *vc3 = container_of(hw, struct vc3_hw_data, hw);
+ const struct vc3_pll_data *pll = vc3->data;
+ u64 div_frc;
+
+ if (rate < pll->vco_min)
+ rate = pll->vco_min;
+ if (rate > pll->vco_max)
+ rate = pll->vco_max;
+
+ vc3->div_int = rate / *parent_rate;
+
+ if (pll->num == VC3_PLL2) {
+ if (vc3->div_int > 0x7ff)
+ rate = *parent_rate * 0x7ff;
+
+ /* Determine best fractional part, which is 16 bit wide */
+ div_frc = rate % *parent_rate;
+ div_frc *= BIT(16) - 1;
+ do_div(div_frc, *parent_rate);
+
+ vc3->div_frc = (u32)div_frc;
+ rate = (*parent_rate *
+ (vc3->div_int * VC3_2_POW_16 + div_frc) / VC3_2_POW_16);
+ } else {
+ rate = *parent_rate * vc3->div_int;
+ }
+
+ return rate;
+}
+
+static int vc3_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct vc3_hw_data *vc3 = container_of(hw, struct vc3_hw_data, hw);
+ const struct vc3_pll_data *pll = vc3->data;
+ u32 val;
+
+ regmap_read(vc3->regmap, pll->int_div_msb_offs, &val);
+ val = (val & 0xf8) | ((vc3->div_int >> 8) & 0x7);
+ regmap_write(vc3->regmap, pll->int_div_msb_offs, val);
+ regmap_write(vc3->regmap, pll->int_div_lsb_offs, vc3->div_int & 0xff);
+
+ if (pll->num == VC3_PLL2) {
+ regmap_write(vc3->regmap, VC3_PLL2_FB_FRC_DIV_MSB,
+ vc3->div_frc >> 8);
+ regmap_write(vc3->regmap, VC3_PLL2_FB_FRC_DIV_LSB,
+ vc3->div_frc & 0xff);
+ }
+
+ return 0;
+}
+
+static const struct clk_ops vc3_pll_ops = {
+ .recalc_rate = vc3_pll_recalc_rate,
+ .round_rate = vc3_pll_round_rate,
+ .set_rate = vc3_pll_set_rate,
+};
+
+static unsigned char vc3_div_mux_get_parent(struct clk_hw *hw)
+{
+ struct vc3_hw_data *vc3 = container_of(hw, struct vc3_hw_data, hw);
+ const struct vc3_clk_data *div_mux = vc3->data;
+ u32 src;
+
+ regmap_read(vc3->regmap, div_mux->offs, &src);
+
+ return !!(src & div_mux->bitmsk);
+}
+
+static int vc3_div_mux_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct vc3_hw_data *vc3 = container_of(hw, struct vc3_hw_data, hw);
+ const struct vc3_clk_data *div_mux = vc3->data;
+
+ regmap_update_bits(vc3->regmap, div_mux->offs, div_mux->bitmsk,
+ index ? div_mux->bitmsk : 0);
+
+ return 0;
+}
+
+static const struct clk_ops vc3_div_mux_ops = {
+ .determine_rate = __clk_mux_determine_rate,
+ .set_parent = vc3_div_mux_set_parent,
+ .get_parent = vc3_div_mux_get_parent,
+};
+
+static unsigned int vc3_get_div(const struct clk_div_table *table,
+ unsigned int val, unsigned long flag)
+{
+ const struct clk_div_table *clkt;
+
+ for (clkt = table; clkt->div; clkt++)
+ if (clkt->val == val)
+ return clkt->div;
+
+ return 0;
+}
+
+static unsigned long vc3_div_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct vc3_hw_data *vc3 = container_of(hw, struct vc3_hw_data, hw);
+ const struct vc3_div_data *div_data = vc3->data;
+ unsigned int val;
+
+ regmap_read(vc3->regmap, div_data->offs, &val);
+ val >>= div_data->shift;
+ val &= VC3_DIV_MASK(div_data->width);
+
+ return divider_recalc_rate(hw, parent_rate, val, div_data->table,
+ div_data->flags, div_data->width);
+}
+
+static long vc3_div_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct vc3_hw_data *vc3 = container_of(hw, struct vc3_hw_data, hw);
+ const struct vc3_div_data *div_data = vc3->data;
+ unsigned int bestdiv;
+
+ /* if read only, just return current value */
+ if (div_data->flags & CLK_DIVIDER_READ_ONLY) {
+ regmap_read(vc3->regmap, div_data->offs, &bestdiv);
+ bestdiv >>= div_data->shift;
+ bestdiv &= VC3_DIV_MASK(div_data->width);
+ bestdiv = vc3_get_div(div_data->table, bestdiv, div_data->flags);
+ return DIV_ROUND_UP(*parent_rate, bestdiv);
+ }
+
+ return divider_round_rate(hw, rate, parent_rate, div_data->table,
+ div_data->width, div_data->flags);
+}
+
+static int vc3_div_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct vc3_hw_data *vc3 = container_of(hw, struct vc3_hw_data, hw);
+ const struct vc3_div_data *div_data = vc3->data;
+ unsigned int value;
+
+ value = divider_get_val(rate, parent_rate, div_data->table,
+ div_data->width, div_data->flags);
+ regmap_update_bits(vc3->regmap, div_data->offs,
+ VC3_DIV_MASK(div_data->width) << div_data->shift,
+ value << div_data->shift);
+ return 0;
+}
+
+static const struct clk_ops vc3_div_ops = {
+ .recalc_rate = vc3_div_recalc_rate,
+ .round_rate = vc3_div_round_rate,
+ .set_rate = vc3_div_set_rate,
+};
+
+static int vc3_clk_mux_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ int ret;
+ int frc;
+
+ ret = clk_mux_determine_rate_flags(hw, req, CLK_SET_RATE_PARENT);
+ if (ret) {
+ /* The below check is equivalent to (best_parent_rate/rate) */
+ if (req->best_parent_rate >= req->rate) {
+ frc = DIV_ROUND_CLOSEST_ULL(req->best_parent_rate,
+ req->rate);
+ req->rate *= frc;
+ return clk_mux_determine_rate_flags(hw, req,
+ CLK_SET_RATE_PARENT);
+ }
+ ret = 0;
+ }
+
+ return ret;
+}
+
+static unsigned char vc3_clk_mux_get_parent(struct clk_hw *hw)
+{
+ struct vc3_hw_data *vc3 = container_of(hw, struct vc3_hw_data, hw);
+ const struct vc3_clk_data *clk_mux = vc3->data;
+ u32 val;
+
+ regmap_read(vc3->regmap, clk_mux->offs, &val);
+
+ return !!(val & clk_mux->bitmsk);
+}
+
+static int vc3_clk_mux_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct vc3_hw_data *vc3 = container_of(hw, struct vc3_hw_data, hw);
+ const struct vc3_clk_data *clk_mux = vc3->data;
+
+ regmap_update_bits(vc3->regmap, clk_mux->offs,
+ clk_mux->bitmsk, index ? clk_mux->bitmsk : 0);
+ return 0;
+}
+
+static const struct clk_ops vc3_clk_mux_ops = {
+ .determine_rate = vc3_clk_mux_determine_rate,
+ .set_parent = vc3_clk_mux_set_parent,
+ .get_parent = vc3_clk_mux_get_parent,
+};
+
+static bool vc3_regmap_is_writeable(struct device *dev, unsigned int reg)
+{
+ return true;
+}
+
+static const struct regmap_config vc3_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .cache_type = REGCACHE_RBTREE,
+ .max_register = 0x24,
+ .writeable_reg = vc3_regmap_is_writeable,
+};
+
+static struct vc3_hw_data clk_div[5];
+
+static const struct clk_parent_data pfd_mux_parent_data[] = {
+ { .index = 0, },
+ { .hw = &clk_div[VC3_DIV2].hw }
+};
+
+static struct vc3_hw_data clk_pfd_mux[] = {
+ [VC3_PFD2_MUX] = {
+ .data = &(struct vc3_clk_data) {
+ .offs = VC3_PLL_OP_CTRL,
+ .bitmsk = BIT(VC3_PLL_OP_CTRL_PLL2_REFIN_SEL)
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "pfd2_mux",
+ .ops = &vc3_pfd_mux_ops,
+ .parent_data = pfd_mux_parent_data,
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT
+ }
+ },
+ [VC3_PFD3_MUX] = {
+ .data = &(struct vc3_clk_data) {
+ .offs = VC3_GENERAL_CTR,
+ .bitmsk = BIT(VC3_GENERAL_CTR_PLL3_REFIN_SEL)
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "pfd3_mux",
+ .ops = &vc3_pfd_mux_ops,
+ .parent_data = pfd_mux_parent_data,
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT
+ }
+ }
+};
+
+static struct vc3_hw_data clk_pfd[] = {
+ [VC3_PFD1] = {
+ .data = &(struct vc3_pfd_data) {
+ .num = VC3_PFD1,
+ .offs = VC3_PLL1_M_DIVIDER,
+ .mdiv1_bitmsk = VC3_PLL1_M_DIV1,
+ .mdiv2_bitmsk = VC3_PLL1_M_DIV2
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "pfd1",
+ .ops = &vc3_pfd_ops,
+ .parent_data = &(const struct clk_parent_data) {
+ .index = 0
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ },
+ [VC3_PFD2] = {
+ .data = &(struct vc3_pfd_data) {
+ .num = VC3_PFD2,
+ .offs = VC3_PLL2_M_DIVIDER,
+ .mdiv1_bitmsk = VC3_PLL2_M_DIV1,
+ .mdiv2_bitmsk = VC3_PLL2_M_DIV2
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "pfd2",
+ .ops = &vc3_pfd_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &clk_pfd_mux[VC3_PFD2_MUX].hw
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ },
+ [VC3_PFD3] = {
+ .data = &(struct vc3_pfd_data) {
+ .num = VC3_PFD3,
+ .offs = VC3_PLL3_M_DIVIDER,
+ .mdiv1_bitmsk = VC3_PLL3_M_DIV1,
+ .mdiv2_bitmsk = VC3_PLL3_M_DIV2
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "pfd3",
+ .ops = &vc3_pfd_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &clk_pfd_mux[VC3_PFD3_MUX].hw
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ }
+};
+
+static struct vc3_hw_data clk_pll[] = {
+ [VC3_PLL1] = {
+ .data = &(struct vc3_pll_data) {
+ .num = VC3_PLL1,
+ .int_div_msb_offs = VC3_PLL1_LOOP_FILTER_N_DIV_MSB,
+ .int_div_lsb_offs = VC3_PLL1_VCO_N_DIVIDER,
+ .vco_min = VC3_PLL1_VCO_MIN,
+ .vco_max = VC3_PLL1_VCO_MAX
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "pll1",
+ .ops = &vc3_pll_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &clk_pfd[VC3_PFD1].hw
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ },
+ [VC3_PLL2] = {
+ .data = &(struct vc3_pll_data) {
+ .num = VC3_PLL2,
+ .int_div_msb_offs = VC3_PLL2_FB_INT_DIV_MSB,
+ .int_div_lsb_offs = VC3_PLL2_FB_INT_DIV_LSB,
+ .vco_min = VC3_PLL2_VCO_MIN,
+ .vco_max = VC3_PLL2_VCO_MAX
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "pll2",
+ .ops = &vc3_pll_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &clk_pfd[VC3_PFD2].hw
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ },
+ [VC3_PLL3] = {
+ .data = &(struct vc3_pll_data) {
+ .num = VC3_PLL3,
+ .int_div_msb_offs = VC3_PLL3_LOOP_FILTER_N_DIV_MSB,
+ .int_div_lsb_offs = VC3_PLL3_N_DIVIDER,
+ .vco_min = VC3_PLL3_VCO_MIN,
+ .vco_max = VC3_PLL3_VCO_MAX
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "pll3",
+ .ops = &vc3_pll_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &clk_pfd[VC3_PFD3].hw
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ }
+};
+
+static const struct clk_parent_data div_mux_parent_data[][2] = {
+ [VC3_DIV1_MUX] = {
+ { .hw = &clk_pll[VC3_PLL1].hw },
+ { .index = 0 }
+ },
+ [VC3_DIV3_MUX] = {
+ { .hw = &clk_pll[VC3_PLL2].hw },
+ { .hw = &clk_pll[VC3_PLL3].hw }
+ },
+ [VC3_DIV4_MUX] = {
+ { .hw = &clk_pll[VC3_PLL2].hw },
+ { .index = 0 }
+ }
+};
+
+static struct vc3_hw_data clk_div_mux[] = {
+ [VC3_DIV1_MUX] = {
+ .data = &(struct vc3_clk_data) {
+ .offs = VC3_GENERAL_CTR,
+ .bitmsk = VC3_GENERAL_CTR_DIV1_SRC_SEL
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "div1_mux",
+ .ops = &vc3_div_mux_ops,
+ .parent_data = div_mux_parent_data[VC3_DIV1_MUX],
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT
+ }
+ },
+ [VC3_DIV3_MUX] = {
+ .data = &(struct vc3_clk_data) {
+ .offs = VC3_PLL3_CHARGE_PUMP_CTRL,
+ .bitmsk = VC3_PLL3_CHARGE_PUMP_CTRL_OUTDIV3_SRC_SEL
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "div3_mux",
+ .ops = &vc3_div_mux_ops,
+ .parent_data = div_mux_parent_data[VC3_DIV3_MUX],
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT
+ }
+ },
+ [VC3_DIV4_MUX] = {
+ .data = &(struct vc3_clk_data) {
+ .offs = VC3_OUTPUT_CTR,
+ .bitmsk = VC3_OUTPUT_CTR_DIV4_SRC_SEL
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "div4_mux",
+ .ops = &vc3_div_mux_ops,
+ .parent_data = div_mux_parent_data[VC3_DIV4_MUX],
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT
+ }
+ }
+};
+
+static struct vc3_hw_data clk_div[] = {
+ [VC3_DIV1] = {
+ .data = &(struct vc3_div_data) {
+ .offs = VC3_OUT_DIV1_DIV2_CTRL,
+ .table = div1_divs,
+ .shift = 4,
+ .width = 4,
+ .flags = CLK_DIVIDER_READ_ONLY
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "div1",
+ .ops = &vc3_div_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &clk_div_mux[VC3_DIV1_MUX].hw
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ },
+ [VC3_DIV2] = {
+ .data = &(struct vc3_div_data) {
+ .offs = VC3_OUT_DIV1_DIV2_CTRL,
+ .table = div245_divs,
+ .shift = 0,
+ .width = 4,
+ .flags = CLK_DIVIDER_READ_ONLY
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "div2",
+ .ops = &vc3_div_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &clk_pll[VC3_PLL1].hw
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ },
+ [VC3_DIV3] = {
+ .data = &(struct vc3_div_data) {
+ .offs = VC3_OUT_DIV3_DIV4_CTRL,
+ .table = div3_divs,
+ .shift = 4,
+ .width = 4,
+ .flags = CLK_DIVIDER_READ_ONLY
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "div3",
+ .ops = &vc3_div_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &clk_div_mux[VC3_DIV3_MUX].hw
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ },
+ [VC3_DIV4] = {
+ .data = &(struct vc3_div_data) {
+ .offs = VC3_OUT_DIV3_DIV4_CTRL,
+ .table = div245_divs,
+ .shift = 0,
+ .width = 4,
+ .flags = CLK_DIVIDER_READ_ONLY
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "div4",
+ .ops = &vc3_div_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &clk_div_mux[VC3_DIV4_MUX].hw
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ },
+ [VC3_DIV5] = {
+ .data = &(struct vc3_div_data) {
+ .offs = VC3_PLL1_CTRL_OUTDIV5,
+ .table = div245_divs,
+ .shift = 0,
+ .width = 4,
+ .flags = CLK_DIVIDER_READ_ONLY
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "div5",
+ .ops = &vc3_div_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &clk_pll[VC3_PLL3].hw
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ }
+};
+
+static struct vc3_hw_data clk_mux[] = {
+ [VC3_DIFF2_MUX] = {
+ .data = &(struct vc3_clk_data) {
+ .offs = VC3_DIFF2_CTRL_REG,
+ .bitmsk = VC3_DIFF2_CTRL_REG_DIFF2_CLK_SEL
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "diff2_mux",
+ .ops = &vc3_clk_mux_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &clk_div[VC3_DIV1].hw,
+ &clk_div[VC3_DIV3].hw
+ },
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ },
+ [VC3_DIFF1_MUX] = {
+ .data = &(struct vc3_clk_data) {
+ .offs = VC3_DIFF1_CTRL_REG,
+ .bitmsk = VC3_DIFF1_CTRL_REG_DIFF1_CLK_SEL
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "diff1_mux",
+ .ops = &vc3_clk_mux_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &clk_div[VC3_DIV1].hw,
+ &clk_div[VC3_DIV3].hw
+ },
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ },
+ [VC3_SE3_MUX] = {
+ .data = &(struct vc3_clk_data) {
+ .offs = VC3_SE3_DIFF1_CTRL_REG,
+ .bitmsk = VC3_SE3_DIFF1_CTRL_REG_SE3_CLK_SEL
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "se3_mux",
+ .ops = &vc3_clk_mux_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &clk_div[VC3_DIV2].hw,
+ &clk_div[VC3_DIV4].hw
+ },
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ },
+ [VC3_SE2_MUX] = {
+ .data = &(struct vc3_clk_data) {
+ .offs = VC3_SE2_CTRL_REG0,
+ .bitmsk = VC3_SE2_CTRL_REG0_SE2_CLK_SEL
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "se2_mux",
+ .ops = &vc3_clk_mux_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &clk_div[VC3_DIV5].hw,
+ &clk_div[VC3_DIV4].hw
+ },
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ },
+ [VC3_SE1_MUX] = {
+ .data = &(struct vc3_clk_data) {
+ .offs = VC3_SE1_DIV4_CTRL,
+ .bitmsk = VC3_SE1_DIV4_CTRL_SE1_CLK_SEL
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "se1_mux",
+ .ops = &vc3_clk_mux_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &clk_div[VC3_DIV5].hw,
+ &clk_div[VC3_DIV4].hw
+ },
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT
+ }
+ }
+};
+
+static struct clk_hw *vc3_of_clk_get(struct of_phandle_args *clkspec,
+ void *data)
+{
+ unsigned int idx = clkspec->args[0];
+ struct clk_hw **clkout_hw = data;
+
+ if (idx >= ARRAY_SIZE(clk_out)) {
+ pr_err("invalid clk index %u for provider %pOF\n", idx, clkspec->np);
+ return ERR_PTR(-EINVAL);
+ }
+
+ return clkout_hw[idx];
+}
+
+static int vc3_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ u8 settings[NUM_CONFIG_REGISTERS];
+ struct regmap *regmap;
+ const char *name;
+ int ret, i;
+
+ regmap = devm_regmap_init_i2c(client, &vc3_regmap_config);
+ if (IS_ERR(regmap))
+ return dev_err_probe(dev, PTR_ERR(regmap),
+ "failed to allocate register map\n");
+
+ ret = of_property_read_u8_array(dev->of_node, "renesas,settings",
+ settings, ARRAY_SIZE(settings));
+ if (!ret) {
+ /*
+ * A raw settings array was specified in the DT. Write the
+ * settings to the device immediately.
+ */
+ for (i = 0; i < NUM_CONFIG_REGISTERS; i++) {
+ ret = regmap_write(regmap, i, settings[i]);
+ if (ret) {
+ dev_err(dev, "error writing to chip (%i)\n", ret);
+ return ret;
+ }
+ }
+ } else if (ret == -EOVERFLOW) {
+ dev_err(&client->dev, "EOVERFLOW reg settings. ARRAY_SIZE: %zu",
+ ARRAY_SIZE(settings));
+ return ret;
+ }
+
+ /* Register pfd muxes */
+ for (i = 0; i < ARRAY_SIZE(clk_pfd_mux); i++) {
+ clk_pfd_mux[i].regmap = regmap;
+ ret = devm_clk_hw_register(dev, &clk_pfd_mux[i].hw);
+ if (ret)
+ return dev_err_probe(dev, ret, "%s failed\n",
+ clk_pfd_mux[i].hw.init->name);
+ }
+
+ /* Register pfd's */
+ for (i = 0; i < ARRAY_SIZE(clk_pfd); i++) {
+ clk_pfd[i].regmap = regmap;
+ ret = devm_clk_hw_register(dev, &clk_pfd[i].hw);
+ if (ret)
+ return dev_err_probe(dev, ret, "%s failed\n",
+ clk_pfd[i].hw.init->name);
+ }
+
+ /* Register pll's */
+ for (i = 0; i < ARRAY_SIZE(clk_pll); i++) {
+ clk_pll[i].regmap = regmap;
+ ret = devm_clk_hw_register(dev, &clk_pll[i].hw);
+ if (ret)
+ return dev_err_probe(dev, ret, "%s failed\n",
+ clk_pll[i].hw.init->name);
+ }
+
+ /* Register divider muxes */
+ for (i = 0; i < ARRAY_SIZE(clk_div_mux); i++) {
+ clk_div_mux[i].regmap = regmap;
+ ret = devm_clk_hw_register(dev, &clk_div_mux[i].hw);
+ if (ret)
+ return dev_err_probe(dev, ret, "%s failed\n",
+ clk_div_mux[i].hw.init->name);
+ }
+
+ /* Register dividers */
+ for (i = 0; i < ARRAY_SIZE(clk_div); i++) {
+ clk_div[i].regmap = regmap;
+ ret = devm_clk_hw_register(dev, &clk_div[i].hw);
+ if (ret)
+ return dev_err_probe(dev, ret, "%s failed\n",
+ clk_div[i].hw.init->name);
+ }
+
+ /* Register clk muxes */
+ for (i = 0; i < ARRAY_SIZE(clk_mux); i++) {
+ clk_mux[i].regmap = regmap;
+ ret = devm_clk_hw_register(dev, &clk_mux[i].hw);
+ if (ret)
+ return dev_err_probe(dev, ret, "%s failed\n",
+ clk_mux[i].hw.init->name);
+ }
+
+ /* Register clk outputs */
+ for (i = 0; i < ARRAY_SIZE(clk_out); i++) {
+ switch (i) {
+ case VC3_DIFF2:
+ name = "diff2";
+ break;
+ case VC3_DIFF1:
+ name = "diff1";
+ break;
+ case VC3_SE3:
+ name = "se3";
+ break;
+ case VC3_SE2:
+ name = "se2";
+ break;
+ case VC3_SE1:
+ name = "se1";
+ break;
+ case VC3_REF:
+ name = "ref";
+ break;
+ default:
+ pr_err("invalid clk output %d\n", i);
+ return -EINVAL;
+ }
+
+ if (i == VC3_REF)
+ clk_out[i] = devm_clk_hw_register_fixed_factor_index(dev,
+ name, 0, CLK_SET_RATE_PARENT, 1, 1);
+ else
+ clk_out[i] = devm_clk_hw_register_fixed_factor_parent_hw(dev,
+ name, &clk_mux[i].hw, CLK_SET_RATE_PARENT, 1, 1);
+
+ if (IS_ERR(clk_out[i]))
+ return PTR_ERR(clk_out[i]);
+ }
+
+ ret = devm_of_clk_add_hw_provider(dev, vc3_of_clk_get, clk_out);
+ if (ret)
+ return dev_err_probe(dev, ret, "unable to add clk provider\n");
+
+ return ret;
+}
+
+static const struct of_device_id dev_ids[] = {
+ { .compatible = "renesas,5p35023" },
+ { /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dev_ids);
+
+static struct i2c_driver vc3_driver = {
+ .driver = {
+ .name = "vc3",
+ .of_match_table = of_match_ptr(dev_ids),
+ },
+ .probe_new = vc3_probe,
+};
+module_i2c_driver(vc3_driver);
+
+MODULE_AUTHOR("Biju Das <biju.das.jz@xxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Renesas VersaClock 3 driver");
+MODULE_LICENSE("GPL");
--
2.25.1
