Commit 1df88c68 authored by Olof Johansson's avatar Olof Johansson
Browse files

Merge tag 'imx-drivers-4.19' of... 

Merge tag 'imx-drivers-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into next/drivers

i.MX drivers update for 4.19:
 - Handle i.MX6SL chip errata ERR006287 in the safest possible way by
   keeping the DISP domain always-on, because Upon resuming from power
   gating, the modules in the display power domain (eLCDIF, EPDC, PXP
   and SPDC) might fail to perform register reads correctly.
 - Use GENPD_FLAG_ALWAYS_ON flag for i.MX6QP PU ERR009619 handling.
   It is functionally identical to the exsiting implementation but
   simpler and slightly faster.

* tag 'imx-drivers-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux

:
  soc: imx6qp: Use GENPD_FLAG_ALWAYS_ON for PU errata
  soc: imx: gpc: Disable 6sl display power gating for ERR006287

Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
parents 85a03fe9 69c04aee

drivers/soc/imx/gpc.c

+12 −6
Original line number Diff line number Diff line
@@ -47,7 +47,6 @@ struct imx_pm_domain { 
	unsigned int reg_offs;

	signed char cntr_pdn_bit;

	unsigned int ipg_rate_mhz;

	unsigned int flags;

};



static inline struct imx_pm_domain *
@@ -62,9 +61,6 @@ static int imx6_pm_domain_power_off(struct generic_pm_domain *genpd) 
	int iso, iso2sw;

	u32 val;



	if (pd->flags & PGC_DOMAIN_FLAG_NO_PD)

		return -EBUSY;



	/* Read ISO and ISO2SW power down delays */

	regmap_read(pd->regmap, pd->reg_offs + GPC_PGC_PUPSCR_OFFS, &val);

	iso = val & 0x3f;
@@ -288,26 +284,31 @@ static struct imx_pm_domain imx_gpc_domains[] = { 
struct imx_gpc_dt_data {

	int num_domains;

	bool err009619_present;

	bool err006287_present;

};



static const struct imx_gpc_dt_data imx6q_dt_data = {

	.num_domains = 2,

	.err009619_present = false,

	.err006287_present = false,

};



static const struct imx_gpc_dt_data imx6qp_dt_data = {

	.num_domains = 2,

	.err009619_present = true,

	.err006287_present = false,

};



static const struct imx_gpc_dt_data imx6sl_dt_data = {

	.num_domains = 3,

	.err009619_present = false,

	.err006287_present = true,

};



static const struct imx_gpc_dt_data imx6sx_dt_data = {

	.num_domains = 4,

	.err009619_present = false,

	.err006287_present = false,

};



static const struct of_device_id imx_gpc_dt_ids[] = {
@@ -413,8 +414,13 @@ static int imx_gpc_probe(struct platform_device *pdev) 


	/* Disable PU power down in normal operation if ERR009619 is present */

	if (of_id_data->err009619_present)

		imx_gpc_domains[GPC_PGC_DOMAIN_PU].flags |=

				PGC_DOMAIN_FLAG_NO_PD;

		imx_gpc_domains[GPC_PGC_DOMAIN_PU].base.flags |=

				GENPD_FLAG_ALWAYS_ON;



	/* Keep DISP always on if ERR006287 is present */

	if (of_id_data->err006287_present)

		imx_gpc_domains[GPC_PGC_DOMAIN_DISPLAY].base.flags |=

				GENPD_FLAG_ALWAYS_ON;



	if (!pgc_node) {

		ret = imx_gpc_old_dt_init(&pdev->dev, regmap,

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