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Diffstat (limited to 'arch/arm/cpu/armv7/exynos/clock.c')
-rw-r--r--arch/arm/cpu/armv7/exynos/clock.c279
1 files changed, 264 insertions, 15 deletions
diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c
index 84a50470a..5bde9d180 100644
--- a/arch/arm/cpu/armv7/exynos/clock.c
+++ b/arch/arm/cpu/armv7/exynos/clock.c
@@ -96,7 +96,7 @@ static int exynos_get_pll_clk(int pllreg, unsigned int r, unsigned int k)
freq = CONFIG_SYS_CLK_FREQ;
- if (pllreg == EPLL) {
+ if (pllreg == EPLL || pllreg == RPLL) {
k = k & 0xffff;
/* FOUT = (MDIV + K / 65536) * FIN / (PDIV * 2^SDIV) */
fout = (m + k / PLL_DIV_65536) * (freq / (p * (1 << s)));
@@ -117,7 +117,7 @@ static int exynos_get_pll_clk(int pllreg, unsigned int r, unsigned int k)
div = PLL_DIV_1024;
else if (proid_is_exynos4412())
div = PLL_DIV_65535;
- else if (proid_is_exynos5250())
+ else if (proid_is_exynos5250() || proid_is_exynos5420())
div = PLL_DIV_65536;
else
return 0;
@@ -362,6 +362,43 @@ unsigned long clock_get_periph_rate(int peripheral)
return 0;
}
+/* exynos5420: return pll clock frequency */
+static unsigned long exynos5420_get_pll_clk(int pllreg)
+{
+ struct exynos5420_clock *clk =
+ (struct exynos5420_clock *)samsung_get_base_clock();
+ unsigned long r, k = 0;
+
+ switch (pllreg) {
+ case APLL:
+ r = readl(&clk->apll_con0);
+ break;
+ case MPLL:
+ r = readl(&clk->mpll_con0);
+ break;
+ case EPLL:
+ r = readl(&clk->epll_con0);
+ k = readl(&clk->epll_con1);
+ break;
+ case VPLL:
+ r = readl(&clk->vpll_con0);
+ k = readl(&clk->vpll_con1);
+ break;
+ case BPLL:
+ r = readl(&clk->bpll_con0);
+ break;
+ case RPLL:
+ r = readl(&clk->rpll_con0);
+ k = readl(&clk->rpll_con1);
+ break;
+ default:
+ printf("Unsupported PLL (%d)\n", pllreg);
+ return 0;
+ }
+
+ return exynos_get_pll_clk(pllreg, r, k);
+}
+
/* exynos4: return ARM clock frequency */
static unsigned long exynos4_get_arm_clk(void)
{
@@ -485,6 +522,27 @@ static unsigned long exynos4x12_get_pwm_clk(void)
return pclk;
}
+/* exynos5420: return pwm clock frequency */
+static unsigned long exynos5420_get_pwm_clk(void)
+{
+ struct exynos5420_clock *clk =
+ (struct exynos5420_clock *)samsung_get_base_clock();
+ unsigned long pclk, sclk;
+ unsigned int ratio;
+
+ /*
+ * CLK_DIV_PERIC0
+ * PWM_RATIO [31:28]
+ */
+ ratio = readl(&clk->div_peric0);
+ ratio = (ratio >> 28) & 0xf;
+ sclk = get_pll_clk(MPLL);
+
+ pclk = sclk / (ratio + 1);
+
+ return pclk;
+}
+
/* exynos4: return uart clock frequency */
static unsigned long exynos4_get_uart_clk(int dev_index)
{
@@ -624,6 +682,53 @@ static unsigned long exynos5_get_uart_clk(int dev_index)
return uclk;
}
+/* exynos5420: return uart clock frequency */
+static unsigned long exynos5420_get_uart_clk(int dev_index)
+{
+ struct exynos5420_clock *clk =
+ (struct exynos5420_clock *)samsung_get_base_clock();
+ unsigned long uclk, sclk;
+ unsigned int sel;
+ unsigned int ratio;
+
+ /*
+ * CLK_SRC_PERIC0
+ * UART0_SEL [6:4]
+ * UART1_SEL [10:8]
+ * UART2_SEL [14:12]
+ * UART3_SEL [18:16]
+ * generalised calculation as follows
+ * sel = (sel >> ((dev_index * 4) + 4)) & mask;
+ */
+ sel = readl(&clk->src_peric0);
+ sel = (sel >> ((dev_index * 4) + 4)) & 0x7;
+
+ if (sel == 0x3)
+ sclk = get_pll_clk(MPLL);
+ else if (sel == 0x6)
+ sclk = get_pll_clk(EPLL);
+ else if (sel == 0x7)
+ sclk = get_pll_clk(RPLL);
+ else
+ return 0;
+
+ /*
+ * CLK_DIV_PERIC0
+ * UART0_RATIO [11:8]
+ * UART1_RATIO [15:12]
+ * UART2_RATIO [19:16]
+ * UART3_RATIO [23:20]
+ * generalised calculation as follows
+ * ratio = (ratio >> ((dev_index * 4) + 8)) & mask;
+ */
+ ratio = readl(&clk->div_peric0);
+ ratio = (ratio >> ((dev_index * 4) + 8)) & 0xf;
+
+ uclk = sclk / (ratio + 1);
+
+ return uclk;
+}
+
static unsigned long exynos4_get_mmc_clk(int dev_index)
{
struct exynos4_clock *clk =
@@ -718,6 +823,47 @@ static unsigned long exynos5_get_mmc_clk(int dev_index)
return uclk;
}
+static unsigned long exynos5420_get_mmc_clk(int dev_index)
+{
+ struct exynos5420_clock *clk =
+ (struct exynos5420_clock *)samsung_get_base_clock();
+ unsigned long uclk, sclk;
+ unsigned int sel, ratio;
+
+ /*
+ * CLK_SRC_FSYS
+ * MMC0_SEL [10:8]
+ * MMC1_SEL [14:12]
+ * MMC2_SEL [18:16]
+ * generalised calculation as follows
+ * sel = (sel >> ((dev_index * 4) + 8)) & mask
+ */
+ sel = readl(&clk->src_fsys);
+ sel = (sel >> ((dev_index * 4) + 8)) & 0x7;
+
+ if (sel == 0x3)
+ sclk = get_pll_clk(MPLL);
+ else if (sel == 0x6)
+ sclk = get_pll_clk(EPLL);
+ else
+ return 0;
+
+ /*
+ * CLK_DIV_FSYS1
+ * MMC0_RATIO [9:0]
+ * MMC1_RATIO [19:10]
+ * MMC2_RATIO [29:20]
+ * generalised calculation as follows
+ * ratio = (ratio >> (dev_index * 10)) & mask
+ */
+ ratio = readl(&clk->div_fsys1);
+ ratio = (ratio >> (dev_index * 10)) & 0x3ff;
+
+ uclk = (sclk / (ratio + 1));
+
+ return uclk;
+}
+
/* exynos4: set the mmc clock */
static void exynos4_set_mmc_clk(int dev_index, unsigned int div)
{
@@ -804,6 +950,29 @@ static void exynos5_set_mmc_clk(int dev_index, unsigned int div)
writel(val, addr);
}
+/* exynos5: set the mmc clock */
+static void exynos5420_set_mmc_clk(int dev_index, unsigned int div)
+{
+ struct exynos5420_clock *clk =
+ (struct exynos5420_clock *)samsung_get_base_clock();
+ unsigned int addr;
+ unsigned int val, shift;
+
+ /*
+ * CLK_DIV_FSYS1
+ * MMC0_RATIO [9:0]
+ * MMC1_RATIO [19:10]
+ * MMC2_RATIO [29:20]
+ */
+ addr = (unsigned int)&clk->div_fsys1;
+ shift = dev_index * 10;
+
+ val = readl(addr);
+ val &= ~(0x3ff << shift);
+ val |= (div & 0x3ff) << shift;
+ writel(val, addr);
+}
+
/* get_lcd_clk: return lcd clock frequency */
static unsigned long exynos4_get_lcd_clk(void)
{
@@ -1324,6 +1493,71 @@ static int exynos5_set_spi_clk(enum periph_id periph_id,
return 0;
}
+static int exynos5420_set_spi_clk(enum periph_id periph_id,
+ unsigned int rate)
+{
+ struct exynos5420_clock *clk =
+ (struct exynos5420_clock *)samsung_get_base_clock();
+ int main;
+ unsigned int fine;
+ unsigned shift, pre_shift;
+ unsigned div_mask = 0xf, pre_div_mask = 0xff;
+ u32 *reg;
+ u32 *pre_reg;
+
+ main = clock_calc_best_scalar(4, 8, 400000000, rate, &fine);
+ if (main < 0) {
+ debug("%s: Cannot set clock rate for periph %d",
+ __func__, periph_id);
+ return -1;
+ }
+ main = main - 1;
+ fine = fine - 1;
+
+ switch (periph_id) {
+ case PERIPH_ID_SPI0:
+ reg = &clk->div_peric1;
+ shift = 20;
+ pre_reg = &clk->div_peric4;
+ pre_shift = 8;
+ break;
+ case PERIPH_ID_SPI1:
+ reg = &clk->div_peric1;
+ shift = 24;
+ pre_reg = &clk->div_peric4;
+ pre_shift = 16;
+ break;
+ case PERIPH_ID_SPI2:
+ reg = &clk->div_peric1;
+ shift = 28;
+ pre_reg = &clk->div_peric4;
+ pre_shift = 24;
+ break;
+ case PERIPH_ID_SPI3:
+ reg = &clk->div_isp1;
+ shift = 16;
+ pre_reg = &clk->div_isp1;
+ pre_shift = 0;
+ break;
+ case PERIPH_ID_SPI4:
+ reg = &clk->div_isp1;
+ shift = 20;
+ pre_reg = &clk->div_isp1;
+ pre_shift = 8;
+ break;
+ default:
+ debug("%s: Unsupported peripheral ID %d\n", __func__,
+ periph_id);
+ return -1;
+ }
+
+ clrsetbits_le32(reg, div_mask << shift, (main & div_mask) << shift);
+ clrsetbits_le32(pre_reg, pre_div_mask << pre_shift,
+ (fine & pre_div_mask) << pre_shift);
+
+ return 0;
+}
+
static unsigned long exynos4_get_i2c_clk(void)
{
struct exynos4_clock *clk =
@@ -1341,9 +1575,11 @@ static unsigned long exynos4_get_i2c_clk(void)
unsigned long get_pll_clk(int pllreg)
{
- if (cpu_is_exynos5())
+ if (cpu_is_exynos5()) {
+ if (proid_is_exynos5420())
+ return exynos5420_get_pll_clk(pllreg);
return exynos5_get_pll_clk(pllreg);
- else {
+ } else {
if (proid_is_exynos4412())
return exynos4x12_get_pll_clk(pllreg);
return exynos4_get_pll_clk(pllreg);
@@ -1375,9 +1611,11 @@ unsigned long get_i2c_clk(void)
unsigned long get_pwm_clk(void)
{
- if (cpu_is_exynos5())
+ if (cpu_is_exynos5()) {
+ if (proid_is_exynos5420())
+ return exynos5420_get_pwm_clk();
return clock_get_periph_rate(PERIPH_ID_PWM0);
- else {
+ } else {
if (proid_is_exynos4412())
return exynos4x12_get_pwm_clk();
return exynos4_get_pwm_clk();
@@ -1386,9 +1624,11 @@ unsigned long get_pwm_clk(void)
unsigned long get_uart_clk(int dev_index)
{
- if (cpu_is_exynos5())
+ if (cpu_is_exynos5()) {
+ if (proid_is_exynos5420())
+ return exynos5420_get_uart_clk(dev_index);
return exynos5_get_uart_clk(dev_index);
- else {
+ } else {
if (proid_is_exynos4412())
return exynos4x12_get_uart_clk(dev_index);
return exynos4_get_uart_clk(dev_index);
@@ -1397,17 +1637,23 @@ unsigned long get_uart_clk(int dev_index)
unsigned long get_mmc_clk(int dev_index)
{
- if (cpu_is_exynos5())
+ if (cpu_is_exynos5()) {
+ if (proid_is_exynos5420())
+ return exynos5420_get_mmc_clk(dev_index);
return exynos5_get_mmc_clk(dev_index);
- else
+ } else {
return exynos4_get_mmc_clk(dev_index);
+ }
}
void set_mmc_clk(int dev_index, unsigned int div)
{
- if (cpu_is_exynos5())
- exynos5_set_mmc_clk(dev_index, div);
- else {
+ if (cpu_is_exynos5()) {
+ if (proid_is_exynos5420())
+ exynos5420_set_mmc_clk(dev_index, div);
+ else
+ exynos5_set_mmc_clk(dev_index, div);
+ } else {
if (proid_is_exynos4412())
exynos4x12_set_mmc_clk(dev_index, div);
else
@@ -1439,10 +1685,13 @@ void set_mipi_clk(void)
int set_spi_clk(int periph_id, unsigned int rate)
{
- if (cpu_is_exynos5())
+ if (cpu_is_exynos5()) {
+ if (proid_is_exynos5420())
+ return exynos5420_set_spi_clk(periph_id, rate);
return exynos5_set_spi_clk(periph_id, rate);
- else
+ } else {
return 0;
+ }
}
int set_i2s_clk_prescaler(unsigned int src_frq, unsigned int dst_frq,
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-31 12:46:31 +0000