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authorMichael Turquette <mturquette@linaro.org>2015-01-27 16:26:12 -0800
committerMichael Turquette <mturquette@linaro.org>2015-01-27 16:26:12 -0800
commitb80418f3c05061094c57ad7a661c9fb14e3f8b73 (patch)
treedd5d12e53b34f610a6f668504fe8ffb9ca063d3f /drivers/clk/rockchip
parente387088a03a07583f248a237cb00c5c955a394c9 (diff)
parente142a4e91443d0fc2185c821626e66729f323d1c (diff)
Merge tag 'v3.20-rockchip-clk1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into clk-next
The two big changes are the additional of the watchdog clock, which we currently only "fake" as the clock gate control is living in a very strange place, but the watchdog driver needs to read the clock rate from it and the setting of rk3288 plls to slow mode upon suspend. Other than that some more exported clocks and a CLK_SET_RATE_PARENT flag for the uart clocks.
Diffstat (limited to 'drivers/clk/rockchip')
-rw-r--r--drivers/clk/rockchip/clk-rk3288.c48
1 files changed, 35 insertions, 13 deletions
diff --git a/drivers/clk/rockchip/clk-rk3288.c b/drivers/clk/rockchip/clk-rk3288.c
index 11194b8329fe..eeadbb6b5206 100644
--- a/drivers/clk/rockchip/clk-rk3288.c
+++ b/drivers/clk/rockchip/clk-rk3288.c
@@ -535,44 +535,44 @@ static struct rockchip_clk_branch rk3288_clk_branches[] __initdata = {
COMPOSITE(0, "uart0_src", mux_pll_src_cpll_gll_usb_npll_p, 0,
RK3288_CLKSEL_CON(13), 13, 2, MFLAGS, 0, 7, DFLAGS,
RK3288_CLKGATE_CON(1), 8, GFLAGS),
- COMPOSITE_FRAC(0, "uart0_frac", "uart0_src", 0,
+ COMPOSITE_FRAC(0, "uart0_frac", "uart0_src", CLK_SET_RATE_PARENT,
RK3288_CLKSEL_CON(17), 0,
RK3288_CLKGATE_CON(1), 9, GFLAGS),
- MUX(SCLK_UART0, "sclk_uart0", mux_uart0_p, 0,
+ MUX(SCLK_UART0, "sclk_uart0", mux_uart0_p, CLK_SET_RATE_PARENT,
RK3288_CLKSEL_CON(13), 8, 2, MFLAGS),
MUX(0, "uart_src", mux_pll_src_cpll_gpll_p, 0,
RK3288_CLKSEL_CON(13), 15, 1, MFLAGS),
COMPOSITE_NOMUX(0, "uart1_src", "uart_src", 0,
RK3288_CLKSEL_CON(14), 0, 7, DFLAGS,
RK3288_CLKGATE_CON(1), 10, GFLAGS),
- COMPOSITE_FRAC(0, "uart1_frac", "uart1_src", 0,
+ COMPOSITE_FRAC(0, "uart1_frac", "uart1_src", CLK_SET_RATE_PARENT,
RK3288_CLKSEL_CON(18), 0,
RK3288_CLKGATE_CON(1), 11, GFLAGS),
- MUX(SCLK_UART1, "sclk_uart1", mux_uart1_p, 0,
+ MUX(SCLK_UART1, "sclk_uart1", mux_uart1_p, CLK_SET_RATE_PARENT,
RK3288_CLKSEL_CON(14), 8, 2, MFLAGS),
COMPOSITE_NOMUX(0, "uart2_src", "uart_src", 0,
RK3288_CLKSEL_CON(15), 0, 7, DFLAGS,
RK3288_CLKGATE_CON(1), 12, GFLAGS),
- COMPOSITE_FRAC(0, "uart2_frac", "uart2_src", 0,
+ COMPOSITE_FRAC(0, "uart2_frac", "uart2_src", CLK_SET_RATE_PARENT,
RK3288_CLKSEL_CON(19), 0,
RK3288_CLKGATE_CON(1), 13, GFLAGS),
- MUX(SCLK_UART2, "sclk_uart2", mux_uart2_p, 0,
+ MUX(SCLK_UART2, "sclk_uart2", mux_uart2_p, CLK_SET_RATE_PARENT,
RK3288_CLKSEL_CON(15), 8, 2, MFLAGS),
COMPOSITE_NOMUX(0, "uart3_src", "uart_src", 0,
RK3288_CLKSEL_CON(16), 0, 7, DFLAGS,
RK3288_CLKGATE_CON(1), 14, GFLAGS),
- COMPOSITE_FRAC(0, "uart3_frac", "uart3_src", 0,
+ COMPOSITE_FRAC(0, "uart3_frac", "uart3_src", CLK_SET_RATE_PARENT,
RK3288_CLKSEL_CON(20), 0,
RK3288_CLKGATE_CON(1), 15, GFLAGS),
- MUX(SCLK_UART3, "sclk_uart3", mux_uart3_p, 0,
+ MUX(SCLK_UART3, "sclk_uart3", mux_uart3_p, CLK_SET_RATE_PARENT,
RK3288_CLKSEL_CON(16), 8, 2, MFLAGS),
COMPOSITE_NOMUX(0, "uart4_src", "uart_src", 0,
RK3288_CLKSEL_CON(3), 0, 7, DFLAGS,
RK3288_CLKGATE_CON(2), 12, GFLAGS),
- COMPOSITE_FRAC(0, "uart4_frac", "uart4_src", 0,
+ COMPOSITE_FRAC(0, "uart4_frac", "uart4_src", CLK_SET_RATE_PARENT,
RK3288_CLKSEL_CON(7), 0,
RK3288_CLKGATE_CON(2), 13, GFLAGS),
- MUX(SCLK_UART4, "sclk_uart4", mux_uart4_p, 0,
+ MUX(SCLK_UART4, "sclk_uart4", mux_uart4_p, CLK_SET_RATE_PARENT,
RK3288_CLKSEL_CON(3), 8, 2, MFLAGS),
COMPOSITE(0, "mac_src", mux_pll_src_npll_cpll_gpll_p, 0,
@@ -598,7 +598,7 @@ static struct rockchip_clk_branch rk3288_clk_branches[] __initdata = {
GATE(0, "jtag", "ext_jtag", 0,
RK3288_CLKGATE_CON(4), 14, GFLAGS),
- COMPOSITE_NODIV(0, "usbphy480m_src", mux_usbphy480m_p, 0,
+ COMPOSITE_NODIV(SCLK_USBPHY480M_SRC, "usbphy480m_src", mux_usbphy480m_p, 0,
RK3288_CLKSEL_CON(13), 11, 2, MFLAGS,
RK3288_CLKGATE_CON(5), 14, GFLAGS),
COMPOSITE_NODIV(SCLK_HSICPHY480M, "sclk_hsicphy480m", mux_hsicphy480m_p, 0,
@@ -704,8 +704,8 @@ static struct rockchip_clk_branch rk3288_clk_branches[] __initdata = {
GATE(SCLK_LCDC_PWM0, "sclk_lcdc_pwm0", "xin24m", 0, RK3288_CLKGATE_CON(13), 10, GFLAGS),
GATE(SCLK_LCDC_PWM1, "sclk_lcdc_pwm1", "xin24m", 0, RK3288_CLKGATE_CON(13), 11, GFLAGS),
- GATE(0, "sclk_pvtm_core", "xin24m", 0, RK3288_CLKGATE_CON(5), 9, GFLAGS),
- GATE(0, "sclk_pvtm_gpu", "xin24m", 0, RK3288_CLKGATE_CON(5), 10, GFLAGS),
+ GATE(SCLK_PVTM_CORE, "sclk_pvtm_core", "xin24m", 0, RK3288_CLKGATE_CON(5), 9, GFLAGS),
+ GATE(SCLK_PVTM_GPU, "sclk_pvtm_gpu", "xin24m", 0, RK3288_CLKGATE_CON(5), 10, GFLAGS),
GATE(0, "sclk_mipidsi_24m", "xin24m", 0, RK3288_CLKGATE_CON(5), 15, GFLAGS),
/* sclk_gpu gates */
@@ -805,6 +805,20 @@ static int rk3288_clk_suspend(void)
rk3288_saved_cru_regs[i] =
readl_relaxed(rk3288_cru_base + reg_id);
}
+
+ /*
+ * Switch PLLs other than DPLL (for SDRAM) to slow mode to
+ * avoid crashes on resume. The Mask ROM on the system will
+ * put APLL, CPLL, and GPLL into slow mode at resume time
+ * anyway (which is why we restore them), but we might not
+ * even make it to the Mask ROM if this isn't done at suspend
+ * time.
+ *
+ * NOTE: only APLL truly matters here, but we'll do them all.
+ */
+
+ writel_relaxed(0xf3030000, rk3288_cru_base + RK3288_MODE_CON);
+
return 0;
}
@@ -866,6 +880,14 @@ static void __init rk3288_clk_init(struct device_node *np)
pr_warn("%s: could not register clock hclk_vcodec_pre: %ld\n",
__func__, PTR_ERR(clk));
+ /* Watchdog pclk is controlled by RK3288_SGRF_SOC_CON0[1]. */
+ clk = clk_register_fixed_factor(NULL, "pclk_wdt", "pclk_pd_alive", 0, 1, 1);
+ if (IS_ERR(clk))
+ pr_warn("%s: could not register clock pclk_wdt: %ld\n",
+ __func__, PTR_ERR(clk));
+ else
+ rockchip_clk_add_lookup(clk, PCLK_WDT);
+
rockchip_clk_register_plls(rk3288_pll_clks,
ARRAY_SIZE(rk3288_pll_clks),
RK3288_GRF_SOC_STATUS1);