diff options
Diffstat (limited to 'drivers/clk/ingenic/jz4725b-cgu.c')
| -rw-r--r-- | drivers/clk/ingenic/jz4725b-cgu.c | 68 |
1 files changed, 58 insertions, 10 deletions
diff --git a/drivers/clk/ingenic/jz4725b-cgu.c b/drivers/clk/ingenic/jz4725b-cgu.c index 584ff4ff81c7..94cee44c854f 100644 --- a/drivers/clk/ingenic/jz4725b-cgu.c +++ b/drivers/clk/ingenic/jz4725b-cgu.c @@ -9,8 +9,11 @@ #include <linux/clk-provider.h> #include <linux/delay.h> #include <linux/of.h> -#include <dt-bindings/clock/jz4725b-cgu.h> + +#include <dt-bindings/clock/ingenic,jz4725b-cgu.h> + #include "cgu.h" +#include "pm.h" /* CGU register offsets */ #define CGU_REG_CPCCR 0x00 @@ -33,6 +36,14 @@ static const s8 pll_od_encoding[4] = { 0x0, 0x1, -1, 0x3, }; +static const u8 jz4725b_cgu_cpccr_div_table[] = { + 1, 2, 3, 4, 6, 8, +}; + +static const u8 jz4725b_cgu_pll_half_div_table[] = { + 2, 1, +}; + static const struct ingenic_cgu_clk_info jz4725b_cgu_clocks[] = { /* External clocks */ @@ -45,6 +56,7 @@ static const struct ingenic_cgu_clk_info jz4725b_cgu_clocks[] = { .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, .pll = { .reg = CGU_REG_CPPCR, + .rate_multiplier = 1, .m_shift = 23, .m_bits = 9, .m_offset = 2, @@ -56,6 +68,7 @@ static const struct ingenic_cgu_clk_info jz4725b_cgu_clocks[] = { .od_max = 4, .od_encoding = pll_od_encoding, .stable_bit = 10, + .bypass_reg = CGU_REG_CPPCR, .bypass_bit = 9, .enable_bit = 8, }, @@ -66,37 +79,65 @@ static const struct ingenic_cgu_clk_info jz4725b_cgu_clocks[] = { [JZ4725B_CLK_PLL_HALF] = { "pll half", CGU_CLK_DIV, .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, - .div = { CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1 }, + .div = { + CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1, 0, + jz4725b_cgu_pll_half_div_table, + }, }, [JZ4725B_CLK_CCLK] = { "cclk", CGU_CLK_DIV, + /* + * Disabling the CPU clock or any parent clocks will hang the + * system; mark it critical. + */ + .flags = CLK_IS_CRITICAL, .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, - .div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 }, + .div = { + CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1, 0, + jz4725b_cgu_cpccr_div_table, + }, }, [JZ4725B_CLK_HCLK] = { "hclk", CGU_CLK_DIV, .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, - .div = { CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1 }, + .div = { + CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1, 0, + jz4725b_cgu_cpccr_div_table, + }, }, [JZ4725B_CLK_PCLK] = { "pclk", CGU_CLK_DIV, .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, - .div = { CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1 }, + .div = { + CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1, 0, + jz4725b_cgu_cpccr_div_table, + }, }, [JZ4725B_CLK_MCLK] = { "mclk", CGU_CLK_DIV, + /* + * Disabling MCLK or its parents will render DRAM + * inaccessible; mark it critical. + */ + .flags = CLK_IS_CRITICAL, .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, - .div = { CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1 }, + .div = { + CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1, 0, + jz4725b_cgu_cpccr_div_table, + }, }, [JZ4725B_CLK_IPU] = { "ipu", CGU_CLK_DIV | CGU_CLK_GATE, .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, - .div = { CGU_REG_CPCCR, 16, 1, 4, 22, -1, -1 }, + .div = { + CGU_REG_CPCCR, 16, 1, 4, 22, -1, -1, 0, + jz4725b_cgu_cpccr_div_table, + }, .gate = { CGU_REG_CLKGR, 13 }, }, @@ -108,11 +149,10 @@ static const struct ingenic_cgu_clk_info jz4725b_cgu_clocks[] = { }, [JZ4725B_CLK_I2S] = { - "i2s", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + "i2s", CGU_CLK_MUX | CGU_CLK_DIV, .parents = { JZ4725B_CLK_EXT, JZ4725B_CLK_PLL_HALF, -1, -1 }, .mux = { CGU_REG_CPCCR, 31, 1 }, .div = { CGU_REG_I2SCDR, 0, 1, 9, -1, -1, -1 }, - .gate = { CGU_REG_CLKGR, 6 }, }, [JZ4725B_CLK_SPI] = { @@ -205,6 +245,12 @@ static const struct ingenic_cgu_clk_info jz4725b_cgu_clocks[] = { .parents = { JZ4725B_CLK_EXT512, JZ4725B_CLK_OSC32K, -1, -1 }, .mux = { CGU_REG_OPCR, 2, 1}, }, + + [JZ4725B_CLK_UDC_PHY] = { + "udc_phy", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_OPCR, 6, true }, + }, }; static void __init jz4725b_cgu_init(struct device_node *np) @@ -221,5 +267,7 @@ static void __init jz4725b_cgu_init(struct device_node *np) retval = ingenic_cgu_register_clocks(cgu); if (retval) pr_err("%s: failed to register CGU Clocks\n", __func__); + + ingenic_cgu_register_syscore(cgu); } -CLK_OF_DECLARE(jz4725b_cgu, "ingenic,jz4725b-cgu", jz4725b_cgu_init); +CLK_OF_DECLARE_DRIVER(jz4725b_cgu, "ingenic,jz4725b-cgu", jz4725b_cgu_init); |