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Date: Tue, 19 Mar 2019 14:16:51 +0000
From: Aisheng Dong <aisheng.dong@....com>
To: Jonathan Neuschäfer <j.neuschaefer@....net>,
"linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>
CC: Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>,
dl-linux-imx <linux-imx@....com>,
Lucas Stach <l.stach@...gutronix.de>,
Michael Grzeschik <m.grzeschik@...gutronix.de>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH RESEND] clk: imx5: Fix i.MX50 clock registers
> From: Jonathan Neuschäfer [mailto:j.neuschaefer@....net]
>
> There are a few differences between the i.MX50 clock tree and those of
> i.MX51 and i.MX53 that are not yet handled in clk-imx51-imx53.c.
> This patch handles the following differences:
>
> - i.MX50 does not have a periph_apm clock. Instead, the main bus clock
> (a.k.a. periph_clk) comes directly from a MUX between pll1_sw,
> pll2_sw, pll3_sw, and lp_apm.
> - The MUX bits for esdhc_{a,c,d}_sel are shifted by one bit within
> CSCMR1.
>
Can you please split them into two patches?
Otherwise, the fix seems good to me.
Regards
Dong Aisheng
> Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@....net>
> ---
>
> I'd appreciate some testing from owners of i.MX51 or i.MX53 based boards to
> ensure that I didn't break the driver for these SoCs.
>
> Previous copy of v1:
> ---
> drivers/clk/imx/clk-imx51-imx53.c | 59 +++++++++++++++++++++++--------
> 1 file changed, 45 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/clk/imx/clk-imx51-imx53.c
> b/drivers/clk/imx/clk-imx51-imx53.c
> index e91c826bce70..c85ebd74a8a5 100644
> --- a/drivers/clk/imx/clk-imx51-imx53.c
> +++ b/drivers/clk/imx/clk-imx51-imx53.c
> @@ -164,10 +164,6 @@ static void __init mx5_clocks_common_init(void
> __iomem *ccm_base)
> clk[IMX5_CLK_CKIH1] = imx_obtain_fixed_clock("ckih1", 0);
> clk[IMX5_CLK_CKIH2] = imx_obtain_fixed_clock("ckih2", 0);
>
> - clk[IMX5_CLK_PERIPH_APM] = imx_clk_mux("periph_apm",
> MXC_CCM_CBCMR, 12, 2,
> - periph_apm_sel, ARRAY_SIZE(periph_apm_sel));
> - clk[IMX5_CLK_MAIN_BUS] = imx_clk_mux("main_bus",
> MXC_CCM_CBCDR, 25, 1,
> - main_bus_sel, ARRAY_SIZE(main_bus_sel));
> clk[IMX5_CLK_PER_LP_APM] = imx_clk_mux("per_lp_apm",
> MXC_CCM_CBCMR, 1, 1,
> per_lp_apm_sel, ARRAY_SIZE(per_lp_apm_sel));
> clk[IMX5_CLK_PER_PRED1] = imx_clk_divider("per_pred1",
> "per_lp_apm", MXC_CCM_CBCDR, 6, 2);
> @@ -191,16 +187,10 @@ static void __init mx5_clocks_common_init(void
> __iomem *ccm_base)
> clk[IMX5_CLK_UART_PRED] = imx_clk_divider("uart_pred",
> "uart_sel", MXC_CCM_CSCDR1, 3, 3);
> clk[IMX5_CLK_UART_ROOT] = imx_clk_divider("uart_root",
> "uart_pred", MXC_CCM_CSCDR1, 0, 3);
>
> - clk[IMX5_CLK_ESDHC_A_SEL] = imx_clk_mux("esdhc_a_sel",
> MXC_CCM_CSCMR1, 20, 2,
> - standard_pll_sel, ARRAY_SIZE(standard_pll_sel));
> - clk[IMX5_CLK_ESDHC_B_SEL] = imx_clk_mux("esdhc_b_sel",
> MXC_CCM_CSCMR1, 16, 2,
> - standard_pll_sel, ARRAY_SIZE(standard_pll_sel));
> clk[IMX5_CLK_ESDHC_A_PRED] = imx_clk_divider("esdhc_a_pred",
> "esdhc_a_sel", MXC_CCM_CSCDR1, 16, 3);
> clk[IMX5_CLK_ESDHC_A_PODF] = imx_clk_divider("esdhc_a_podf",
> "esdhc_a_pred", MXC_CCM_CSCDR1, 11, 3);
> clk[IMX5_CLK_ESDHC_B_PRED] = imx_clk_divider("esdhc_b_pred",
> "esdhc_b_sel", MXC_CCM_CSCDR1, 22, 3);
> clk[IMX5_CLK_ESDHC_B_PODF] = imx_clk_divider("esdhc_b_podf",
> "esdhc_b_pred", MXC_CCM_CSCDR1, 19, 3);
> - clk[IMX5_CLK_ESDHC_C_SEL] = imx_clk_mux("esdhc_c_sel",
> MXC_CCM_CSCMR1, 19, 1, esdhc_c_sel, ARRAY_SIZE(esdhc_c_sel));
> - clk[IMX5_CLK_ESDHC_D_SEL] = imx_clk_mux("esdhc_d_sel",
> MXC_CCM_CSCMR1, 18, 1, esdhc_d_sel, ARRAY_SIZE(esdhc_d_sel));
>
> clk[IMX5_CLK_EMI_SEL] = imx_clk_mux("emi_sel",
> MXC_CCM_CBCDR, 26, 1,
> emi_slow_sel, ARRAY_SIZE(emi_slow_sel)); @@
> -311,10 +301,6 @@ static void __init mx5_clocks_common_init(void __iomem
> *ccm_base)
> clk_register_clkdev(clk[IMX5_CLK_CPU_PODF], NULL, "cpu0");
> clk_register_clkdev(clk[IMX5_CLK_GPC_DVFS], "gpc_dvfs", NULL);
>
> - /* Set SDHC parents to be PLL2 */
> - clk_set_parent(clk[IMX5_CLK_ESDHC_A_SEL], clk[IMX5_CLK_PLL2_SW]);
> - clk_set_parent(clk[IMX5_CLK_ESDHC_B_SEL], clk[IMX5_CLK_PLL2_SW]);
> -
> /* move usb phy clk to 24MHz */
> clk_set_parent(clk[IMX5_CLK_USB_PHY_SEL], clk[IMX5_CLK_OSC]); }
> @@ -342,8 +328,21 @@ static void __init mx50_clocks_init(struct
> device_node *np)
>
> mx5_clocks_common_init(ccm_base);
>
> + /*
> + * This clock is called periph_clk in the i.MX50 Reference Manual, but
> + * it comes closest in scope to the main_bus_clk of i.MX51 and i.MX53
> + */
> + clk[IMX5_CLK_MAIN_BUS] = imx_clk_mux("main_bus",
> MXC_CCM_CBCDR, 25, 2,
> + standard_pll_sel, ARRAY_SIZE(standard_pll_sel));
> +
> clk[IMX5_CLK_LP_APM] = imx_clk_mux("lp_apm", MXC_CCM_CCSR,
> 10, 1,
> lp_apm_sel, ARRAY_SIZE(lp_apm_sel));
> + clk[IMX5_CLK_ESDHC_A_SEL] = imx_clk_mux("esdhc_a_sel",
> MXC_CCM_CSCMR1, 21, 2,
> + standard_pll_sel, ARRAY_SIZE(standard_pll_sel));
> + clk[IMX5_CLK_ESDHC_B_SEL] = imx_clk_mux("esdhc_b_sel",
> MXC_CCM_CSCMR1, 16, 2,
> + standard_pll_sel, ARRAY_SIZE(standard_pll_sel));
> + clk[IMX5_CLK_ESDHC_C_SEL] = imx_clk_mux("esdhc_c_sel",
> MXC_CCM_CSCMR1, 20, 1, esdhc_c_sel, ARRAY_SIZE(esdhc_c_sel));
> + clk[IMX5_CLK_ESDHC_D_SEL] = imx_clk_mux("esdhc_d_sel",
> MXC_CCM_CSCMR1, 19, 1, esdhc_d_sel, ARRAY_SIZE(esdhc_d_sel));
> clk[IMX5_CLK_ESDHC1_PER_GATE] =
> imx_clk_gate2("esdhc1_per_gate", "esdhc_a_podf", MXC_CCM_CCGR3, 2);
> clk[IMX5_CLK_ESDHC2_PER_GATE] =
> imx_clk_gate2("esdhc2_per_gate", "esdhc_c_sel", MXC_CCM_CCGR3, 6);
> clk[IMX5_CLK_ESDHC3_PER_GATE] =
> imx_clk_gate2("esdhc3_per_gate", "esdhc_b_podf", MXC_CCM_CCGR3, 10);
> @@ -372,6 +371,10 @@ static void __init mx50_clocks_init(struct
> device_node *np)
> clk_data.clk_num = ARRAY_SIZE(clk);
> of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
>
> + /* Set SDHC parents to be PLL2 */
> + clk_set_parent(clk[IMX5_CLK_ESDHC_A_SEL], clk[IMX5_CLK_PLL2_SW]);
> + clk_set_parent(clk[IMX5_CLK_ESDHC_B_SEL], clk[IMX5_CLK_PLL2_SW]);
> +
> /* set SDHC root clock to 200MHZ*/
> clk_set_rate(clk[IMX5_CLK_ESDHC_A_PODF], 200000000);
> clk_set_rate(clk[IMX5_CLK_ESDHC_B_PODF], 200000000); @@ -410,6
> +413,10 @@ static void __init mx51_clocks_init(struct device_node *np)
>
> mx5_clocks_common_init(ccm_base);
>
> + clk[IMX5_CLK_PERIPH_APM] = imx_clk_mux("periph_apm",
> MXC_CCM_CBCMR, 12, 2,
> + periph_apm_sel, ARRAY_SIZE(periph_apm_sel));
> + clk[IMX5_CLK_MAIN_BUS] = imx_clk_mux("main_bus",
> MXC_CCM_CBCDR, 25, 1,
> + main_bus_sel, ARRAY_SIZE(main_bus_sel));
> clk[IMX5_CLK_LP_APM] = imx_clk_mux("lp_apm", MXC_CCM_CCSR,
> 9, 1,
> lp_apm_sel, ARRAY_SIZE(lp_apm_sel));
> clk[IMX5_CLK_IPU_DI0_SEL] = imx_clk_mux_flags("ipu_di0_sel",
> MXC_CCM_CSCMR2, 26, 3,
> @@ -422,6 +429,12 @@ static void __init mx51_clocks_init(struct
> device_node *np)
> mx51_tve_sel, ARRAY_SIZE(mx51_tve_sel));
> clk[IMX5_CLK_TVE_GATE] = imx_clk_gate2("tve_gate", "tve_sel",
> MXC_CCM_CCGR2, 30);
> clk[IMX5_CLK_TVE_PRED] = imx_clk_divider("tve_pred", "pll3_sw",
> MXC_CCM_CDCDR, 28, 3);
> + clk[IMX5_CLK_ESDHC_A_SEL] = imx_clk_mux("esdhc_a_sel",
> MXC_CCM_CSCMR1, 20, 2,
> + standard_pll_sel, ARRAY_SIZE(standard_pll_sel));
> + clk[IMX5_CLK_ESDHC_B_SEL] = imx_clk_mux("esdhc_b_sel",
> MXC_CCM_CSCMR1, 16, 2,
> + standard_pll_sel, ARRAY_SIZE(standard_pll_sel));
> + clk[IMX5_CLK_ESDHC_C_SEL] = imx_clk_mux("esdhc_c_sel",
> MXC_CCM_CSCMR1, 19, 1, esdhc_c_sel, ARRAY_SIZE(esdhc_c_sel));
> + clk[IMX5_CLK_ESDHC_D_SEL] = imx_clk_mux("esdhc_d_sel",
> MXC_CCM_CSCMR1, 18, 1, esdhc_d_sel, ARRAY_SIZE(esdhc_d_sel));
> clk[IMX5_CLK_ESDHC1_PER_GATE] =
> imx_clk_gate2("esdhc1_per_gate", "esdhc_a_podf", MXC_CCM_CCGR3, 2);
> clk[IMX5_CLK_ESDHC2_PER_GATE] =
> imx_clk_gate2("esdhc2_per_gate", "esdhc_b_podf", MXC_CCM_CCGR3, 6);
> clk[IMX5_CLK_ESDHC3_PER_GATE] =
> imx_clk_gate2("esdhc3_per_gate", "esdhc_c_sel", MXC_CCM_CCGR3, 10);
> @@ -452,6 +465,10 @@ static void __init mx51_clocks_init(struct
> device_node *np)
> /* set the usboh3 parent to pll2_sw */
> clk_set_parent(clk[IMX5_CLK_USBOH3_SEL], clk[IMX5_CLK_PLL2_SW]);
>
> + /* Set SDHC parents to be PLL2 */
> + clk_set_parent(clk[IMX5_CLK_ESDHC_A_SEL], clk[IMX5_CLK_PLL2_SW]);
> + clk_set_parent(clk[IMX5_CLK_ESDHC_B_SEL], clk[IMX5_CLK_PLL2_SW]);
> +
> /* set SDHC root clock to 166.25MHZ*/
> clk_set_rate(clk[IMX5_CLK_ESDHC_A_PODF], 166250000);
> clk_set_rate(clk[IMX5_CLK_ESDHC_B_PODF], 166250000); @@ -506,6
> +523,10 @@ static void __init mx53_clocks_init(struct device_node *np)
>
> mx5_clocks_common_init(ccm_base);
>
> + clk[IMX5_CLK_PERIPH_APM] = imx_clk_mux("periph_apm",
> MXC_CCM_CBCMR, 12, 2,
> + periph_apm_sel, ARRAY_SIZE(periph_apm_sel));
> + clk[IMX5_CLK_MAIN_BUS] = imx_clk_mux("main_bus",
> MXC_CCM_CBCDR, 25, 1,
> + main_bus_sel, ARRAY_SIZE(main_bus_sel));
> clk[IMX5_CLK_LP_APM] = imx_clk_mux("lp_apm", MXC_CCM_CCSR,
> 10, 1,
> lp_apm_sel, ARRAY_SIZE(lp_apm_sel));
> clk[IMX5_CLK_LDB_DI1_DIV_3_5] =
> imx_clk_fixed_factor("ldb_di1_div_3_5", "ldb_di1_sel", 2, 7);
> @@ -527,6 +548,12 @@ static void __init mx53_clocks_init(struct
> device_node *np)
> mx53_tve_ext_sel,
> ARRAY_SIZE(mx53_tve_ext_sel), CLK_SET_RATE_PARENT);
> clk[IMX5_CLK_TVE_GATE] = imx_clk_gate2("tve_gate", "tve_pred",
> MXC_CCM_CCGR2, 30);
> clk[IMX5_CLK_TVE_PRED] = imx_clk_divider("tve_pred",
> "tve_ext_sel", MXC_CCM_CDCDR, 28, 3);
> + clk[IMX5_CLK_ESDHC_A_SEL] = imx_clk_mux("esdhc_a_sel",
> MXC_CCM_CSCMR1, 20, 2,
> + standard_pll_sel, ARRAY_SIZE(standard_pll_sel));
> + clk[IMX5_CLK_ESDHC_B_SEL] = imx_clk_mux("esdhc_b_sel",
> MXC_CCM_CSCMR1, 16, 2,
> + standard_pll_sel, ARRAY_SIZE(standard_pll_sel));
> + clk[IMX5_CLK_ESDHC_C_SEL] = imx_clk_mux("esdhc_c_sel",
> MXC_CCM_CSCMR1, 19, 1, esdhc_c_sel, ARRAY_SIZE(esdhc_c_sel));
> + clk[IMX5_CLK_ESDHC_D_SEL] = imx_clk_mux("esdhc_d_sel",
> MXC_CCM_CSCMR1, 18, 1, esdhc_d_sel, ARRAY_SIZE(esdhc_d_sel));
> clk[IMX5_CLK_ESDHC1_PER_GATE] =
> imx_clk_gate2("esdhc1_per_gate", "esdhc_a_podf", MXC_CCM_CCGR3, 2);
> clk[IMX5_CLK_ESDHC2_PER_GATE] =
> imx_clk_gate2("esdhc2_per_gate", "esdhc_c_sel", MXC_CCM_CCGR3, 6);
> clk[IMX5_CLK_ESDHC3_PER_GATE] =
> imx_clk_gate2("esdhc3_per_gate", "esdhc_b_podf", MXC_CCM_CCGR3, 10);
> @@ -589,6 +616,10 @@ static void __init mx53_clocks_init(struct
> device_node *np)
> clk_data.clk_num = ARRAY_SIZE(clk);
> of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
>
> + /* Set SDHC parents to be PLL2 */
> + clk_set_parent(clk[IMX5_CLK_ESDHC_A_SEL], clk[IMX5_CLK_PLL2_SW]);
> + clk_set_parent(clk[IMX5_CLK_ESDHC_B_SEL], clk[IMX5_CLK_PLL2_SW]);
> +
> /* set SDHC root clock to 200MHZ*/
> clk_set_rate(clk[IMX5_CLK_ESDHC_A_PODF], 200000000);
> clk_set_rate(clk[IMX5_CLK_ESDHC_B_PODF], 200000000);
> --
> 2.20.1
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