Linux-libre 4.7.1-gnupck-4.7.1-gnu

4 files changed, 47 insertions, 34 deletions

diff --git a/drivers/clk/ingenic/cgu.c b/drivers/clk/ingenic/cgu.c
index 7cfb7b2a2..e8248f918 100644
--- a/drivers/clk/ingenic/cgu.c
+++ b/drivers/clk/ingenic/cgu.c
@@ -325,6 +325,7 @@ ingenic_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
 		div = (div_reg >> clk_info->div.shift) &
 		      GENMASK(clk_info->div.bits - 1, 0);
 		div += 1;
+		div *= clk_info->div.div;
 
 		rate /= div;
 	}
@@ -345,6 +346,14 @@ ingenic_clk_calc_div(const struct ingenic_cgu_clk_info *clk_info,
 	div = min_t(unsigned, div, 1 << clk_info->div.bits);
 	div = max_t(unsigned, div, 1);
 
+	/*
+	 * If the divider value itself must be divided before being written to
+	 * the divider register, we must ensure we don't have any bits set that
+	 * would be lost as a result of doing so.
+	 */
+	div /= clk_info->div.div;
+	div *= clk_info->div.div;
+
 	return div;
 }
 
@@ -395,7 +404,7 @@ ingenic_clk_set_rate(struct clk_hw *hw, unsigned long req_rate,
 		/* update the divide */
 		mask = GENMASK(clk_info->div.bits - 1, 0);
 		reg &= ~(mask << clk_info->div.shift);
-		reg |= (div - 1) << clk_info->div.shift;
+		reg |= ((div / clk_info->div.div) - 1) << clk_info->div.shift;
 
 		/* clear the stop bit */
 		if (clk_info->div.stop_bit != -1)
diff --git a/drivers/clk/ingenic/cgu.h b/drivers/clk/ingenic/cgu.h
index 99347e2b9..09700b2c5 100644
--- a/drivers/clk/ingenic/cgu.h
+++ b/drivers/clk/ingenic/cgu.h
@@ -76,8 +76,11 @@ struct ingenic_cgu_mux_info {
 /**
  * struct ingenic_cgu_div_info - information about a divider
  * @reg: offset of the divider control register within the CGU
- * @shift: number of bits to shift the divide value by (ie. the index of
+ * @shift: number of bits to left shift the divide value by (ie. the index of
  *         the lowest bit of the divide value within its control register)
+ * @div: number of bits to divide the divider value by (i.e. if the
+ *	 effective divider value is the value written to the register
+ *	 multiplied by some constant)
  * @bits: the size of the divide value in bits
  * @ce_bit: the index of the change enable bit within reg, or -1 if there
  *          isn't one
@@ -87,6 +90,7 @@ struct ingenic_cgu_mux_info {
 struct ingenic_cgu_div_info {
 	unsigned reg;
 	u8 shift;
+	u8 div;
 	u8 bits;
 	s8 ce_bit;
 	s8 busy_bit;
diff --git a/drivers/clk/ingenic/jz4740-cgu.c b/drivers/clk/ingenic/jz4740-cgu.c
index 305a26c2a..510fe7e0c 100644
--- a/drivers/clk/ingenic/jz4740-cgu.c
+++ b/drivers/clk/ingenic/jz4740-cgu.c
@@ -90,51 +90,51 @@ static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = {
 	[JZ4740_CLK_PLL_HALF] = {
 		"pll half", CGU_CLK_DIV,
 		.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
-		.div = { CGU_REG_CPCCR, 21, 1, -1, -1, -1 },
+		.div = { CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1 },
 	},
 
 	[JZ4740_CLK_CCLK] = {
 		"cclk", CGU_CLK_DIV,
 		.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
-		.div = { CGU_REG_CPCCR, 0, 4, 22, -1, -1 },
+		.div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 },
 	},
 
 	[JZ4740_CLK_HCLK] = {
 		"hclk", CGU_CLK_DIV,
 		.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
-		.div = { CGU_REG_CPCCR, 4, 4, 22, -1, -1 },
+		.div = { CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1 },
 	},
 
 	[JZ4740_CLK_PCLK] = {
 		"pclk", CGU_CLK_DIV,
 		.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
-		.div = { CGU_REG_CPCCR, 8, 4, 22, -1, -1 },
+		.div = { CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1 },
 	},
 
 	[JZ4740_CLK_MCLK] = {
 		"mclk", CGU_CLK_DIV,
 		.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
-		.div = { CGU_REG_CPCCR, 12, 4, 22, -1, -1 },
+		.div = { CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1 },
 	},
 
 	[JZ4740_CLK_LCD] = {
 		"lcd", CGU_CLK_DIV | CGU_CLK_GATE,
 		.parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 },
-		.div = { CGU_REG_CPCCR, 16, 5, 22, -1, -1 },
+		.div = { CGU_REG_CPCCR, 16, 1, 5, 22, -1, -1 },
 		.gate = { CGU_REG_CLKGR, 10 },
 	},
 
 	[JZ4740_CLK_LCD_PCLK] = {
 		"lcd_pclk", CGU_CLK_DIV,
 		.parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 },
-		.div = { CGU_REG_LPCDR, 0, 11, -1, -1, -1 },
+		.div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 },
 	},
 
 	[JZ4740_CLK_I2S] = {
 		"i2s", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
 		.parents = { JZ4740_CLK_EXT, JZ4740_CLK_PLL_HALF, -1, -1 },
 		.mux = { CGU_REG_CPCCR, 31, 1 },
-		.div = { CGU_REG_I2SCDR, 0, 8, -1, -1, -1 },
+		.div = { CGU_REG_I2SCDR, 0, 1, 8, -1, -1, -1 },
 		.gate = { CGU_REG_CLKGR, 6 },
 	},
 
@@ -142,21 +142,21 @@ static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = {
 		"spi", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
 		.parents = { JZ4740_CLK_EXT, JZ4740_CLK_PLL, -1, -1 },
 		.mux = { CGU_REG_SSICDR, 31, 1 },
-		.div = { CGU_REG_SSICDR, 0, 4, -1, -1, -1 },
+		.div = { CGU_REG_SSICDR, 0, 1, 4, -1, -1, -1 },
 		.gate = { CGU_REG_CLKGR, 4 },
 	},
 
 	[JZ4740_CLK_MMC] = {
 		"mmc", CGU_CLK_DIV | CGU_CLK_GATE,
 		.parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 },
-		.div = { CGU_REG_MSCCDR, 0, 5, -1, -1, -1 },
+		.div = { CGU_REG_MSCCDR, 0, 1, 5, -1, -1, -1 },
 		.gate = { CGU_REG_CLKGR, 7 },
 	},
 
 	[JZ4740_CLK_UHC] = {
 		"uhc", CGU_CLK_DIV | CGU_CLK_GATE,
 		.parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 },
-		.div = { CGU_REG_UHCCDR, 0, 4, -1, -1, -1 },
+		.div = { CGU_REG_UHCCDR, 0, 1, 4, -1, -1, -1 },
 		.gate = { CGU_REG_CLKGR, 14 },
 	},
 
@@ -164,7 +164,7 @@ static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = {
 		"udc", CGU_CLK_MUX | CGU_CLK_DIV,
 		.parents = { JZ4740_CLK_EXT, JZ4740_CLK_PLL_HALF, -1, -1 },
 		.mux = { CGU_REG_CPCCR, 29, 1 },
-		.div = { CGU_REG_CPCCR, 23, 6, -1, -1, -1 },
+		.div = { CGU_REG_CPCCR, 23, 1, 6, -1, -1, -1 },
 		.gate = { CGU_REG_SCR, 6 },
 	},
 
diff --git a/drivers/clk/ingenic/jz4780-cgu.c b/drivers/clk/ingenic/jz4780-cgu.c
index 431f96230..b35d6d9dd 100644
--- a/drivers/clk/ingenic/jz4780-cgu.c
+++ b/drivers/clk/ingenic/jz4780-cgu.c
@@ -296,13 +296,13 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 	[JZ4780_CLK_CPU] = {
 		"cpu", CGU_CLK_DIV,
 		.parents = { JZ4780_CLK_CPUMUX, -1, -1, -1 },
-		.div = { CGU_REG_CLOCKCONTROL, 0, 4, 22, -1, -1 },
+		.div = { CGU_REG_CLOCKCONTROL, 0, 1, 4, 22, -1, -1 },
 	},
 
 	[JZ4780_CLK_L2CACHE] = {
 		"l2cache", CGU_CLK_DIV,
 		.parents = { JZ4780_CLK_CPUMUX, -1, -1, -1 },
-		.div = { CGU_REG_CLOCKCONTROL, 4, 4, -1, -1, -1 },
+		.div = { CGU_REG_CLOCKCONTROL, 4, 1, 4, -1, -1, -1 },
 	},
 
 	[JZ4780_CLK_AHB0] = {
@@ -310,7 +310,7 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 		.parents = { -1, JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL,
 			     JZ4780_CLK_EPLL },
 		.mux = { CGU_REG_CLOCKCONTROL, 26, 2 },
-		.div = { CGU_REG_CLOCKCONTROL, 8, 4, 21, -1, -1 },
+		.div = { CGU_REG_CLOCKCONTROL, 8, 1, 4, 21, -1, -1 },
 	},
 
 	[JZ4780_CLK_AHB2PMUX] = {
@@ -323,20 +323,20 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 	[JZ4780_CLK_AHB2] = {
 		"ahb2", CGU_CLK_DIV,
 		.parents = { JZ4780_CLK_AHB2PMUX, -1, -1, -1 },
-		.div = { CGU_REG_CLOCKCONTROL, 12, 4, 20, -1, -1 },
+		.div = { CGU_REG_CLOCKCONTROL, 12, 1, 4, 20, -1, -1 },
 	},
 
 	[JZ4780_CLK_PCLK] = {
 		"pclk", CGU_CLK_DIV,
 		.parents = { JZ4780_CLK_AHB2PMUX, -1, -1, -1 },
-		.div = { CGU_REG_CLOCKCONTROL, 16, 4, 20, -1, -1 },
+		.div = { CGU_REG_CLOCKCONTROL, 16, 1, 4, 20, -1, -1 },
 	},
 
 	[JZ4780_CLK_DDR] = {
 		"ddr", CGU_CLK_MUX | CGU_CLK_DIV,
 		.parents = { -1, JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, -1 },
 		.mux = { CGU_REG_DDRCDR, 30, 2 },
-		.div = { CGU_REG_DDRCDR, 0, 4, 29, 28, 27 },
+		.div = { CGU_REG_DDRCDR, 0, 1, 4, 29, 28, 27 },
 	},
 
 	[JZ4780_CLK_VPU] = {
@@ -344,7 +344,7 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 		.parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL,
 			     JZ4780_CLK_EPLL, -1 },
 		.mux = { CGU_REG_VPUCDR, 30, 2 },
-		.div = { CGU_REG_VPUCDR, 0, 4, 29, 28, 27 },
+		.div = { CGU_REG_VPUCDR, 0, 1, 4, 29, 28, 27 },
 		.gate = { CGU_REG_CLKGR1, 2 },
 	},
 
@@ -352,7 +352,7 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 		"i2s_pll", CGU_CLK_MUX | CGU_CLK_DIV,
 		.parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_EPLL, -1, -1 },
 		.mux = { CGU_REG_I2SCDR, 30, 1 },
-		.div = { CGU_REG_I2SCDR, 0, 8, 29, 28, 27 },
+		.div = { CGU_REG_I2SCDR, 0, 1, 8, 29, 28, 27 },
 	},
 
 	[JZ4780_CLK_I2S] = {
@@ -366,7 +366,7 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 		.parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL,
 			     JZ4780_CLK_VPLL, -1 },
 		.mux = { CGU_REG_LP0CDR, 30, 2 },
-		.div = { CGU_REG_LP0CDR, 0, 8, 28, 27, 26 },
+		.div = { CGU_REG_LP0CDR, 0, 1, 8, 28, 27, 26 },
 	},
 
 	[JZ4780_CLK_LCD1PIXCLK] = {
@@ -374,7 +374,7 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 		.parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL,
 			     JZ4780_CLK_VPLL, -1 },
 		.mux = { CGU_REG_LP1CDR, 30, 2 },
-		.div = { CGU_REG_LP1CDR, 0, 8, 28, 27, 26 },
+		.div = { CGU_REG_LP1CDR, 0, 1, 8, 28, 27, 26 },
 	},
 
 	[JZ4780_CLK_MSCMUX] = {
@@ -386,21 +386,21 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 	[JZ4780_CLK_MSC0] = {
 		"msc0", CGU_CLK_DIV | CGU_CLK_GATE,
 		.parents = { JZ4780_CLK_MSCMUX, -1, -1, -1 },
-		.div = { CGU_REG_MSC0CDR, 0, 8, 29, 28, 27 },
+		.div = { CGU_REG_MSC0CDR, 0, 2, 8, 29, 28, 27 },
 		.gate = { CGU_REG_CLKGR0, 3 },
 	},
 
 	[JZ4780_CLK_MSC1] = {
 		"msc1", CGU_CLK_DIV | CGU_CLK_GATE,
 		.parents = { JZ4780_CLK_MSCMUX, -1, -1, -1 },
-		.div = { CGU_REG_MSC1CDR, 0, 8, 29, 28, 27 },
+		.div = { CGU_REG_MSC1CDR, 0, 2, 8, 29, 28, 27 },
 		.gate = { CGU_REG_CLKGR0, 11 },
 	},
 
 	[JZ4780_CLK_MSC2] = {
 		"msc2", CGU_CLK_DIV | CGU_CLK_GATE,
 		.parents = { JZ4780_CLK_MSCMUX, -1, -1, -1 },
-		.div = { CGU_REG_MSC2CDR, 0, 8, 29, 28, 27 },
+		.div = { CGU_REG_MSC2CDR, 0, 2, 8, 29, 28, 27 },
 		.gate = { CGU_REG_CLKGR0, 12 },
 	},
 
@@ -409,7 +409,7 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 		.parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL,
 			     JZ4780_CLK_EPLL, JZ4780_CLK_OTGPHY },
 		.mux = { CGU_REG_UHCCDR, 30, 2 },
-		.div = { CGU_REG_UHCCDR, 0, 8, 29, 28, 27 },
+		.div = { CGU_REG_UHCCDR, 0, 1, 8, 29, 28, 27 },
 		.gate = { CGU_REG_CLKGR0, 24 },
 	},
 
@@ -417,7 +417,7 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 		"ssi_pll", CGU_CLK_MUX | CGU_CLK_DIV,
 		.parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, -1, -1 },
 		.mux = { CGU_REG_SSICDR, 30, 1 },
-		.div = { CGU_REG_SSICDR, 0, 8, 29, 28, 27 },
+		.div = { CGU_REG_SSICDR, 0, 1, 8, 29, 28, 27 },
 	},
 
 	[JZ4780_CLK_SSI] = {
@@ -430,7 +430,7 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 		"cim_mclk", CGU_CLK_MUX | CGU_CLK_DIV,
 		.parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, -1, -1 },
 		.mux = { CGU_REG_CIMCDR, 31, 1 },
-		.div = { CGU_REG_CIMCDR, 0, 8, 30, 29, 28 },
+		.div = { CGU_REG_CIMCDR, 0, 1, 8, 30, 29, 28 },
 	},
 
 	[JZ4780_CLK_PCMPLL] = {
@@ -438,7 +438,7 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 		.parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL,
 			     JZ4780_CLK_EPLL, JZ4780_CLK_VPLL },
 		.mux = { CGU_REG_PCMCDR, 29, 2 },
-		.div = { CGU_REG_PCMCDR, 0, 8, 28, 27, 26 },
+		.div = { CGU_REG_PCMCDR, 0, 1, 8, 28, 27, 26 },
 	},
 
 	[JZ4780_CLK_PCM] = {
@@ -453,7 +453,7 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 		.parents = { -1, JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL,
 			     JZ4780_CLK_EPLL },
 		.mux = { CGU_REG_GPUCDR, 30, 2 },
-		.div = { CGU_REG_GPUCDR, 0, 4, 29, 28, 27 },
+		.div = { CGU_REG_GPUCDR, 0, 1, 4, 29, 28, 27 },
 		.gate = { CGU_REG_CLKGR1, 4 },
 	},
 
@@ -462,7 +462,7 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 		.parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL,
 			     JZ4780_CLK_VPLL, -1 },
 		.mux = { CGU_REG_HDMICDR, 30, 2 },
-		.div = { CGU_REG_HDMICDR, 0, 8, 29, 28, 26 },
+		.div = { CGU_REG_HDMICDR, 0, 1, 8, 29, 28, 26 },
 		.gate = { CGU_REG_CLKGR1, 9 },
 	},
 
@@ -471,7 +471,7 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 		.parents = { -1, JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL,
 			     JZ4780_CLK_EPLL },
 		.mux = { CGU_REG_BCHCDR, 30, 2 },
-		.div = { CGU_REG_BCHCDR, 0, 4, 29, 28, 27 },
+		.div = { CGU_REG_BCHCDR, 0, 1, 4, 29, 28, 27 },
 		.gate = { CGU_REG_CLKGR0, 1 },
 	},